9431724156

Visiting Research Professor, IIPE (Indian Institute of Petroleum & Energy), Visakhapatnam, Andhra Pradesh -530003, India

• More than 14 years of teaching and research at Ranchi University, Ranchi
• 28  years of teaching and research at IIT(ISM) Dhanbad
• Research Experience at Silesian Technical University, Poland
• Research Experience at University of Newcadtle upon Tyne, UK

B.Sc.(Hons), M.Sc.,  Ph.D., LLB. 

43 years of teaching and research.

i) Full Member of International Committee for Coal & Organic Petrology (ICCP).

ii) Member of TSOP (The Society for Organic Petrology); INTERLABORATORY STUDY: TESTING REPRODUCIBILITY OF BIOMASS FUELS COMPONENT IDENTIFICATION USING REFLECTED LIGHT MICROSCOPY

iii) Member of EAOG (European Association of Organic Geochemists).

iv) Member of IGCP – 269.

v) Member of IGCP – 325

vi) Member of the Society of Economic Geologists and Mineral Technologists (SEGMITE).

vii) Member of International Commission on Fossil Fuels (CFF) with special responsibility for coal resources.

viii) Member, South Asian Association of Economic Geologists

ix) International Commissions I, II & III-Working in International Commission

I (General Coal and Organic Petrology), International Commission

II (Geological Application of Coal and Organic Petrology) and International

Commission III (Application of Coal Petrology to Industries) of ICCP.

x) Member, International Working Group on “Microscopy of Carbon Materials".

Foreign Journals:

1. Sameeksha Mishra,Anup Krishna Prasad, Arya Vinod, Anubhav Shukla, Shailayee Mukherjee, Bitan Purkait, Varma, A. K., Bhabesh C Sarkar 2025. A Multi-Model Approach for Estimation of Ash Yield in Coal Using Fourier Transform Infrared Spectroscopy, Scientific Reports, 15:13786; pp1-18 DOI: https://doi.org/10.1038/s41598-025-98071-3 .

2.  Kumar,D., Adsul, T. , Moroeng, O. M. , Pachuau, Z., Panigrahi,A. Ghosh,S., Datta,A. , Sen, R., Varma, A. K. 2025. Climatic reconstruction of the Late Palaeocene using sedimentary archives from the Bikaner-Nagaur Basin, Rajasthan, India. International Journal of Coal Geology, V. 299, pp 1-14 DOI:https://doi.org/10.1016/j.coal.2025.104695

3.  Hazra,B.; Chandra,D.; Vishal,V.; Ostadhassan M.; Sethi, C.; Saikia, B. K.; Pandey J. K.; Varma, A K. , 2024. Experimental study on pore structure evolution of thermally treated shales: implications for CO2 storage in underground thermally treated shale horizons, International Journal of Coal Science and Technology, Vol.11,pp1-21 DOI: https://doi.org/10.1007/s40789-024-00717-6

4. Adsul,T.; O'Beirne, Molly D.; Fike, D.; Ghosh, S.; Werne,J.; P Gilhooly III, W.; Hackley, Paul C.; Javin, Hatcherian J.; Philip, B.; Hazra, B.; Bhattacharyya, S.; Konar

R.; Varma, A. K.; 2024. Decoding Paleomire Conditions of Paleogene Superhigh-Organic-Sulfur Coals, International Journal of Coal Geology, V. 290, pp 1-19 DOI: https://doi.org/10.1016/j.coal.2024.104559,

5.  AryaVinod , Anup Krishna Prasad, Sameeksha Mishra , Bitan Purkait , Shailayee Mukherjee, Anubhav Shukla, Nirasindhu Desinayak , Bhabesh Chandra Sarkar & Atul KumarVarma, 2024. A novel multi-model estimation of phosphorus in coal and its ash using FTIR spectroscopy, Scientific Report(2024) 14:13785s. https://doi.org/10.1038/s41598-024-63672-x

6.  Predeanu,G., Wojtaszek-Kalaitzidi, M., Suárez Ruiz, I., Suárez Ruiz, Bălănescu, M.N., Gómez Borrego, A., Ghiran, M.D., Hackley, P.C., Kalaitzidis S., Kus, J., Mastalerz, Misz-Kennan, M., Pusz, S., Rodrigues, S., Siavalas, G., Varma ,A., Zdravkov, A., Životić, D. 2024. Structure and morphology of chars and activated carbons obtained from thermal treatment of coal and biomass origin materials, including their wastes: results from the ICCP Microscopy of Carbon Materials Working Group, International Journal of Coal Geology . DOI: https://doi.org/10.1016/j.coal.2024.104519

7.  Ghosh, S., Adsul,T., Tiwari,B., Kumar, D., Varma, A. K., 2024. Exploring Geochemical Signatures in Production Water: Insights from Coalbed Methane and Shale Gas Development – A Brief Review, Manuscript ID: methane-2748156., Methane ,172-190pp, doi: https://doi.org/10.3390/methane3010011

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8.  Lenka, P., Majhi, D.K., Kumar, D., Varma, A. K., 2024.Geochemical paradigms of Paleo-Mesoproterozoic Vindhyan Basin shales to decipher kerogen type, thermal maturity and hydrocarbon generation potential, The Society for Organic Petrology Newsletter, vol. 41/1, p.17. https://www.tso,p.org/newsletters/41_1.pdf

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9.  Kanu, S., Kumar, D., G,hosh, S., Varma, A. K., 2024. Source and Palaeodeposition environment of organic matter in Paleo-Mesoproterozoic shales of Vindhyan Basin, India, The Society for Organic Petrology Newsletter, vol. 41/1, p.16. https://www.tsop.org/newsletters/41_1.pdf

10.  Kumar, D., Mukherjee, R., Paul, S., Majhi, D.K., Adsul,T., Varma, A. K., 2024. Assessment of the organic matter source, depositional environment and hydrocarbon generation potential of Barsingsar lignite-shale-carbonaceous shale sequence from Western Rajasthan, India, The Society for Organic Petrology Newsletter, vol. 41/1, p.15. https://www.tsop.org/newsletters/41_1.pdf

11.  Adsul,T., O'Beirne, Molly D., Ghosh,S., Werne, Josef P., Mani, D., Bhattacharyya, S., Varma,A. K., 2023. Molecular fossil chronicles and geochemical probes of Paleogene coals from Meghalaya, India, Organic Geochemistry, Vol.184, 104659; DOI: https://doi.org/10.1016/j.orggeochem.2023.104659.

12.  Agnieszka Drobniak, Maria Mastalerz, Zbigniew Jelonek, Iwona Jelonek, Tushar Adsul, Neža Malenšek Andolšek, Omid Haeri Ardakani, Tara Congo, Batbold Demberelsuren, Bryon S. Donohoe, Ashley Douds, Deolinda Flores, Ranjin Ganzorig, Santanu Ghosh, Andrew Gize, Paula Alexandra Goncalves, Paul Hackley, Javin Hatcherian, James C. Hower, Stavros Kalaitzidis, Sławomir Kędzior, Wayne Knowles, Jolanta Kus, Kacper Lis, Grzegorz Lis, Bei Liu, Qingyong Luo, Du Meili, Divya Mishra, Magdalena Misz-Kennan,Theophile Mugerwa, Jennifer L. Nedzweckas, Jennifer M.K. O'Keefe, Jackie Park, Richard Pearson, Henrik I. Petersen, Julito Reyes, Joana Ribeiro, Genaro de la Rosa-Rodriguez, Piotr Sosnowski, Brett Valentine, Atul Kumar Varma, Małgorzata Wojtaszek-Kalaitzidi, Zhanjie Xu, Alexander Zdravkov, Konrad Ziemianin,2023. Interlaboratory Study: Testing Reproducibility of Solid Biofuels Component Identification Using Reflected Light Microscopy, International Journal of Coal Geology, Vol.277,pp 1-13, DOI : https://doi.org/10.1016/j.coal.2023.104331

13. Sameeksha Mishra, Anup Krishna Prasad , Anubhav Shukla, Arya Vinod,

Kumari Preety, Atul Kumar Varma,2023. Estimation of Carbon Content in High-Ash Coal Using Mid-Infrared Fourier-Transform Infrared Spectroscopy, Minerals, DOI : .https://doi.org/10.3390/min13070938

14.  Adsul ,T., Ghosh, S., Kumar, S., Tiwari,B., Dutta,S., Varma, A.K.,2023. Biogeochemical Controls on Methane Generation: A Review on Indian Coal Resources, Minerals,vol.13, Issue 5, 695, pp 1-42, DOI : https://doi.org/10.3390/min13050695

15.  Shukla,A., Prasad ,A. K., Mishra,S., Vinod, A.,Varma, A.K., 2023. Rapid Estimation of Sulfur Content in High Ash Indian Coal using Mid-Infrared FTIR data, Minerals, pp1-20, 13,Issue 5, DOI: https://doi.org/10.3390/min13050634

16. Kumar Sawan; Lahiri,Sivaji; Hazra, Bodhisatwa; Varma, Atul Kumar; 2023 Understanding Permeability Anisotropy in Natural Fracture Framework of Coals using Topological Properties and Fluid flow, TSOP Newsletter, Vol.40, No.1, pp 15-16.

17.  Tiwari, B., Ghosh, S., Kumar S., Varma, A.K., 2023. Trace and rare earth elements in the Permian shales: geochemical paradigms, Arabian Journal of Geosciences, vol. 16:272 pp 1-22; https://doi.org/10.1007/s12517-023-11361-w7.

18.  Adsul ,T., Ghosh, S., Ojha, A., Bhattacharyya, S., Varma, A.K.,. 2023. Spectral narratives of microstructural restyling and their controls on hydrocarbon generation potential from coal, International Journal of Coal Science & Technology,Vol.10, pp1-33, DOI: https://doi.org/10.1007/s40789-023-00591-8

19.  Kumar S., Varma, A.K., Mendhe, V. A., Kumar, Shikhar, Uday Bhan, 2022. Geochemical and petrographical fngerprints of coal bed methane potential in the Son valley Basin, India, Arabian Journal of Geosciences, 15:1705, https://doi.org/10.1007/s12517-022-11007-3

20.  Mishra, D.K., Hackley, P.C., Jubb, A.M., Sanders, M.M., Agrawal, S., and Varma, A.K., 2022, Maturation study of vitrinite in carbonaceous shales and coals, Int. J.Coal Geol, vol. 259, No. 104044; pp 1-13 DOI:https://doi.org/10.1016/j.coal.2022.104044.

21. Kumar, D., Ghosh, S., Tiwari, B.,Adsul, T., Varma A.K., 2022. Relevance of Rock Eval data in assessing the depositional environment of the bio-sedimentary rocks in the Bikaner -Nagaur Basin, Rajasthan, India, ICCP News No.82. pp 9-11.

22. Ghosh, S., Ojha, A., Varma A.K., 2022. Geochemical signatures of potassium metasomatism in anthracite from the Himalayan fold-thrust belts of Sikkim, International Journal of Coal Science & Technology, vol. 9, Issue 1 pp 29-50, DOI 10.1007/s40789-022-00495-z .

23.  Preety, Kumari , Prasad, Anup K. , Varma, Atul K., Hesham El-Askary,2022. Accuracy Assessment, Comparative Performance,and Enhancement of Public Domain Digital Elevation Models (ASTER 30 m, SRTM 30 m, CARTOSAT 30 m, SRTM 90 m, MERIT 90 m, and TanDEM-X 90 m) Using DGPS, Remote Sensing, 14, 1334pp 1-36 DOI: https://doi.org/10.3390/rs14061334

24.  Sen, Debadatta, Ghosh, S., Varma, Atul Kumar, 2022. Functional Group Chemistry and its Functions in Coal Carbonization: A Scientific Intelligence from Infrared spectroscopy, Arabian Journal of Geosciences,15:406; DOI:https://doi.org/10.1007/s12517-022-09719-7

25.  Adsul ,T,Ghosh, S., Varma A.K.,2021. Expressive Bittersweet Association of Sulfur with Coal, TSOP Newsletter, Vol. 38, No.4, pp 10-12; DOI: https://www.tsop.org/newsletters/38_4.pdf; DOI: 10.13140/RG.2.2.19748.40328

26.  Das, Piyush Ranjan; Mendhe, Vinod Atmaram; Kamble, Alka Damodhar; Sharma, Pushpa; Shukla, Priyanka and Varma, Atul Kumar,2021. Petrographic and Geochemical Controls on Methane Genesis, Pore Fractal Attributes, and Sorption of Lower Gondwana Coal of Jharia Basin, India, ACS Omega,pp A-Z, DOI: https://doi.org/10.1021/acsomega.1c02040

27.  Biswas S., Varma, A. K., Kumar, M., Saikia, B. K., 2021. Multi analytical approach of provenance signatures and indication of marine environment in coal and shale bearing sequence from Makum Coalfield, India., Arabian Journal of Geosciences, 14:2183; pp1-23 , DOI: https://doi.org/10.1007/s12517-021-08569-z

28.  Kumar, S., Varma, A. K., Mendhe, V. A., Tiwari,B., 2021. Multi scale pore characterization of Barakar shale in the Mand Raigarh Basin, India: scientifc upshots from geochemical approaches and imaging techniques., Arabian Journal of Geosciences, 14:2188; pp 1-15, DOI: https://doi.org/10.1007/s12517-021-08585-z

29.  Kumar, D., Ghosh, S., Varma A.K.,2021. Influence of palaeovegetation shifts on organic matter sources: An acuity from the n-alkane palaeohydrological proxies. TSOP Newsletter, Vol. 38, No.3, pp 8-10; DOI: https://www.tsop.org/newsletters/38_3.pdf

30.  Kumar, D., Ghosh, S., Tiwari, B., Varma A.K., Mathews, Runcie P., Chetia, R., 2021. Palaeocene-Eocene Organic Sedimentary Archives of Bikaner-Nagaur Basin, Rajasthan, India: An Integrated Revelation from Biogeochemical and Elemental Proxies, International Journal of Coal Geology, 247,103848 pp1-21 DOI:https://doi.org/10.1016/j.coal.2021.103848

31.  Khangar, Ranjit G. , Mendhe, Vinod Atmaram, Varma, Atul Kumar , Mishra, Vivek Kumar , Pandey, Shashanka , 2021.Organo-inorganic facets of shale gas reservoir of Jharia Basin of damodar valley, India, Journal of Natural Gas Science and Engineering, JNGSE Vol.95, pp1-25,104176 DOI: https://doi.org/10.1016/j.jngse.2021.104176

32.  Buragohain, J., Mendhe, V. A., Varma A.K., and Shukla, P., 2021. Organo-Lithotype Controls on Cleat/Fractures, Matrix-Associated Pores, and Physicomechanical Properties of Coal Seams of Raniganj Coalfield, India, ACS Omega, DOI : https://doi.org/10.1021/acsomega.1c02041

33. Bannerjee, M., Mendhe, V. A., Kamble, A. D., Varma, A. K., Singh, B. D., Kumar S.2021. Facets of coalbed methane reservoir in East Bokaro Basin, India, Journal of Petroleum Science and Engineering,

DOI: https://doi.org/10.1016/j.petrol.2021.109255

34.  Ghosh S., Varma, A. K., 2021.Deformational Features of Macerals in Anthracite from the Rangit Tectonic Window, Sikkim, India., TSOP Newsletter , Vol. 38, No.2,pp 11-12; DOI: https://www.tsop.org/newsletters/38_2.pdf

35.  Dutta, S., Ghosh S., Varma, A. K., 2021.Methanogenesis in the Eocene Tharad lignite deposits of Sanchor Sub-Basin, Gujarat, India: Insights from gas molecular ratio and stable carbon isotopic compositions, Journal of Natural Gas Science and Engineering V.91, 103970.DOI: https://doi.org/10.1016/j.jngse.2021.103970 .

36.  Mishra, Divya Kumari; Varma, Atul Kumar; Mendhe,Vinod Atmaram, Agrawal, Shailesh; Singh, Bhagwan Das; Hackley, Paul C. 2021, Organo-Facies and Mineral Effects on Sorption Capacity of Low- Maturity Permian Barakar Shales from the Auranga Basin, Jharkhand, India, Energy & Fuels, American Chemical SocietyDOI:https://doi.org/10.1021/acs.energyfuels.0c04310

37.  Boral, P., Varma A. K. and Maity, S.,2021. Nitration of Jharia basin coals, India: a study of structural modifications by XRD and FTIR techniques., International Journal of Coal Science and Technology,1-20, DOI: https://doi.org/10.1007/s40789-021-00422-8 .

38.  Ghosh, B., Sahoo , B. K., Jha ,P. K., Manjhi , K. K., Sahu, J. N. and A. K. Varma, 2020. Effect of Microlithotype Maceral Distribution on Coke Quality, Coke and Chemistry, vol.63, No.6, pp 294-302.Q3, Springer; DOI: https://doi.org/10.3103/S1068364X20060058

39.  Ghosh S., Ojha, A., Varma, A. K.,2020. Spectral manifestations of coal metamorphism: Insights from coal microstructural framework, International Journal of Coal Geology, Volume 228, 103549. https://doi.org/10.1016/j.coal.2020.103549. Q1.

40.  Tiwari, B., Ojha, A., Ghosh, S., Varma, A.K., Mendhe, V.A., Mondal, A., 2020. A composite microstructural and geochemical approach to quench the quest for hydrocarbon from Barren Measures shales of Jharia Basin, India. Journal of Natural Gas Science and Engineering V.78, 103310, 1-16. https://doi.org/10.1016/j.jngse.2020.103310 . Q1.

41.  Biswas, S., Varma, A.K., Kumar, M., Mani, D., Saxena,V. K., Mishra,V.,2020. Influence of geochemical, organo-petrographical and palynofacies assemblages on hydrocarbon generation: A study from upper Oligocene coal and shale of the Makum Coal Basin, Assam, India, Marine and Petroleum Geology, V. 114,104206.DOI: https://doi.org/10.1016/J.MARPETGEO.2019.104206 . Q1.

42.  Misra, S., Das, S.K., Varma, A.K., Mani, D., Kalpana, M.S., Ekblad, A., Biswas, S. 2020. Multi-proxy approach on the hydrocarbon generation perspective of Barjora Basin, India. Marine and Petroleum Geology, V. 112,104108. DOI: https://doi.org/10.1016/J.MARPETGEO.2019.104108. Q1.

43.  Samad, S.K., Mishra, D.K., Mathews, R.P., Ghosh, S., Mendhe, V.A.,Varma, A.K., 2020.Geochemical attributes for source rock and palaeoclimatic reconstruction of the Auranga Basin, India, Journal of Petroleum Science and Engineering,V.185, 10665 doi: https://doi.org/10.1016/j.petrol.2019.106665. Q1.

44.  Anwita, Santanu Ghosh, Atul Kumar Varma,∗, Supriyo Kumar Das, Debayan Pal,Gaurav Solanki,2020.Metamorphic transformations of nitrogen functionalities: Stabilization of organic nitrogen in anthracite and its effect on δ15N parameter. Marine and Petroleum Geology, V. 112,104090. Q1.DOI: https://doi.org/10.1016/j.marpetgeo.2019.104090

45.  Ghosh, Santanu, Varma, Atul Kumar.,2020. Secondary microbial methanogenesis in the coal beds of the Raniganj Basin, India: A future quest for microbially enhanced methane production, The Society for Organic Petrology Newsletter Vol. 37, No. 2, pp 8-9. https://www.tsop.org/newsletters/38_2.pdf

46. Sahoo, S. K., Suresh, N., Varma, A. K., 2020. Flotation production of vitrinite maceral concentrate and its optimization using response surface approach. International Journal of Coal Preparation and Utilization. Vol.40, 155-174p (DOI: 10.1080/19392699.2017.1356827). Q2.

47.  Varma, A. K., Sahoo, A., Saikia, B. K., Das, T., 2019.Petrographic controls of coal from Ib valley Basin for carbon nano-products formation, International Journal of Coal Geology,Vol.211,1-18. Article id: 103211. Q1.DOI: https://doi.org/10.1016/j.coal.2019.103211

48.  Mishra,V., Chakravarty,S., Finkelman ,R. B., Varma, A. K., 2019. Geochemistry of Rare Earth Elements in Lower Gondwana Coals of the Talchir Coal Basin, India,. Journal of Geochemical Exploration 204 :43–56. Q1.DOI: https://doi.org/10.1016/j.gexplo.2019.04.006

49.  Misra, S., Varma, A. K., Hazra, B., Biswas, S., Samad, S.K.,2019. The influence of the thermal aureole asymmetry on hydrocarbon generative potential of coal beds: insights from Raniganj Basin, West Bengal, India. International Journal of Coal Geology,Vol.206,91-105. Q1. DOI: https://doi.org/10.1016/j.coal.2019.03.008

50.  Kumar S., Mendhe, V.A, Kamble, A. D., Varma, A. K., Mishra, D. K., Bannerjee, M., Buragohain, J., Prasad, A. K.2019.Geochemical attributes, pore structures and fractal characteristics of Barakar shale deposits of Mand-Raigarh Basin, India, Marine and Petroleum Geology, V. 103,377-396. Q1.DOI: https://doi.org/10.1016/j.marpetgeo.2019.02.026

51.  Hazra, B., Chandra, D., Singh, A. K., Varma, A. K., Mani, D., Singh, P. K., Boral, P., Buragohain, J.,.2019. Comparative pore structural attributes and fractal dimensions of Lower Permian organicmatter-bearing sediments of two Indian basins:Inferences from nitrogen gas adsorption, Energy Sources, Part A: Recovery,Utilization, and Environmental Effects,V.41, pp 2975-2988. DOI: 10.1080/15567036.2019.1582737 (Link: https://doi.org/10.1080/15567036.2019.1582737). Q2.

52.  Varma, A. K., Biswas,S., Patil ,D. J., Mani, D., Misra,S., Hazra,B., 2019. Significance of lithotypes for hydrocarbon generation and storage. Fuel,Volume 235, Pages 396-405. Q1. DOI: https://doi.org/10.1016/j.fuel.2018.07.111

53.  Sahoo, S. K., Suresh, N., Varma, A. K.2019. Kinetic Studies on Petrographic Components of Coal in Batch Flotation Operation. International Journal of Coal Preparation and Utilization, vol.39, no.5 Pages 259-280 To link to this article: http://dx.doi.org/10.1080/19392699.2017.1314966. Q2.

54.  Sahoo, S. K., Suresh, N., Varma, A. K.2019. Performance evaluation of basic flotation kinetic models using advanced statistical techniques. International Journal of Coal Preparation and Utilization.Vol.39, Issue 2, pp 65-87, Manuscript ID: https://doi.org/10.1080/19392699.2017.1302436. Q2.

55.  Ghosh ,B., Sahoo,B. K., Chakraborty B., Manjhi, K. K., Das, S. K., Sahu, J. N., and Varma, A K.,2018. Influence of coke structure on coke quality using image analysis method., Int J Coal Sci Technol.,V,5,p.473-485. https://doi.org/10.1007/s40789-018-0227-0

56. Mendhe, V. A., Kumar, S., Kamble, A. D., Mishra, S., Varma, A. K., Bannerjee, M., Mishra, V.K.,Sharma,S., Buragohain,J., Tiwari, B. 2018, Organo-mineralogical insights of shale gas reservoir of Ib-River Mand-Raigarh Basin, India. Journal of Natural Gas Science and Engineering,Volume 59, November 2018, Pages 136-155. Q1.

DOI: https://doi.org/10.1016/j.jngse.2018.08.026

57.  Ghosh,S. , Rodrigues,S., Varma, A. K., Esterle ,J., Patra,S., Dirghangi,S. S.,2018. Petrographic and Raman spectroscopic characterization of coal from Himalayan fold-thrust belts of Sikkim, India., International Journal of Coal Geology,Vol.196,246-259. Q1. DOI : https://doi.org/10.1016/j.coal.2018.07.014

58. Patra S., Dirghangi, S.S., Rudra, A., Dutta S. Ghosh,,S., Varma, A. K., Shome D., Kalpana,M.S.,2018. Effects of thermal maturity on biomarker distributions in Gondwana coals from the Satpura and Damodar Valley Basins,India. International Journal of Coal Geology,Vol.196,63-81. Q1.

59. Mendhe, V. A.,Kumar,V., Saxena, V.K., Bannerjee, M., Kamble, A. D., Singh, B.D., Mishra, S.,Sharma,S.,Kumar,J. Varma, A. K., Mishra, D. K. , Samad S. K. ,2018. Evaluation of gas resource potentiality, geochemical and mineralogical characteristics of Permian shale beds of Latehar-Auranga Coalfield, India. International Journal of Coal Geology,Vol.196,43-62. Q1.

60.  Misra,S., Varma, A. K.,Das,S.K., Mani,D., Biswas,S.,2018. Thermal controls of lamprophyre sill on hydrocarbon generation outlook of shale beds in Raniganj basin, India. Journal of Natural Gas Science and Engineering 56, 536–548. Q1.DOI: https://doi.org/10.1016/j.jngse.2018.06.028

61.  Sahoo, S. K. , Suresh, N. and Varma, A. K., 2018. Performance evaluation of batch coal flotation from the petrologic point of view. International Journal of Coal Preparation And Utilization pp 1-18. Q2. doi. https://doi.org/10.1080/19392699.2018.1455668

62.  Ghosh,S. , Golding, S.D. Varma, A. K., Baublys. K. A. 2018. Stable isotopic composition of coal bed gas and associated formation water samples from Raniganj Basin, West Bengal, India. International Journal of Coal Geology Volume 191, 15 April 2018, Pages 1–6. Q1.DOI: https://doi.org/10.1016/j.coal.2018.02.019

63.  Mishra, D. K. , Samad S. K. , Varma, A. K., Mendhe, V. A. ,2018. Pore geometrical complexity and fractal facets of Permian shales and coals from Auranga Basin, Jharkhand, India. Journal of Natural Gas Science and Engineering, 52, 25–43. Q1. DOI: https://doi.org/10.1016/j.jngse.2018.01.014

64.  Hazra ,B., Wood, D. A., Vishal,V., Varma, A. K., Dhruba Sakha, Singh,A.K. , 2018. Porosity controls and fractal disposition of organic-rich Permian shales using low-pressure adsorption techniques, Fuel, 220,837-848. Q1.DOI: https://doi.org/10.1016/j.fuel.2018.02.023

65. Mendhe, V. A., Mishra, S. , Varma, A. K., Kamble, A. D., Bannerjee, M., Singh, B.D., Sutay, T. M. , Singh, V. P., 2018. Geochemical and petrophysical characteristics of Permian shale gas reservoirs of Raniganj Basin, West Bengal, India. International Journal of Coal Geology,Vol.188,1-24. Q1. DOI:

10.1016/j.coal.2018.01.012

66.  Hazra ,B., Wood, D. A., Varma, A. K., Sarkar, B. C. Tiwari,B., Singh,A.K. , 2018. Insights into the effects of matrix retention and inert carbon on the petroleum generation potential of Indian Gondwana shales. Marine and Petroleum Geology, Vol. 91,125-138. Q1.DOI: https://doi.org/10.1016/j.marpetgeo.2017.12.028

67.  Varma, A. K., Mishra, D. K. , Samad S. K. , Prasad A. K. , Panigrahi, D. C., Mendhe, V. A. , Singh, B. D., 2018. Geochemical and organo-petrographic characterization for hydrocarbon generation from Barakar Formation in Auranga Basin, India, International Journal of Coal Geology,Vol.186,97-114. Q1.DOI: https://doi.org/10.1016/j.coal.2017.12.002

68.  Mishra,S., Mendhe, V. A., Varma, A. K., Kamble, A. D., Sharma, S., Bannerjee, M., Kalpana, M.S. , 2018. Influence of organic and inorganic content on fractal dimensions of Barakar and Barren Measures shale gas reservoirs of Raniganj basin, India, Journal of Natural Gas Science and Engineering 49 , 393– 409. Q1.DOI: https://doi.org/10.1016/j.jngse.2017.11.028

69.  Sahoo,S. K. , Suresh,N. and Varma, A. K., 2017. Determining the Best Particle Size-Class for Flotation of a High Ash Coal, International Journal of Coal Preparation and Utilization, https://doi.org/10.1080/19392699.2017.1409216. Q2.

70.  Mendhe, V. A., Mishra,S.,Khangar, R. G., Kamble, A. D., Kumar, D., Varma, A. K., Singh, H., Kumar, S., Bannerjee, M., 2017. Organo-petrographic and pore facets of Permian shale beds of Jharia Basin with implications to shale gas reservoir, Journal of Earth Science, October 2017, Volume 28, Issue 5, pp 897–916. Q3.DOI: https://doi.org/10.1007.s/12583-017-0779-8

71.  Bhowmick,T., Nayak, B., Varma,A.K.,2017. Chemical and mineralogical composition of Kathara Coal, East Bokaro Coalfield, India, Fuel 208 , 91–100. Q1. DOI:http://dx.doi.org/10.1016/j.fuel.2016.08.092

72.  Sahoo, S. K., Suresh, N., Varma, A. K.,2017. Characterization of macerals from the coal flotation froth fraction. Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, Vol.39, pp 992-998. DOI: 10.1080/15567036.2017.1283550. To link to this article: http://dx.doi.org/10.1080/15567036.2017.1283550. Taylor & Francis; Vol.39, No.9, 893-898. Q2.

73.  Mendhe, V. A, Bannerjee, M.,Varma, A. K., Kamble, A. D., Mishra, S., 2017. Fractal and pore dispositions of coal seams with significance to coalbed methane plays of East Bokaro,Jharkhand,India. Journal of Natural Gas Science & Engineering Vol.38,412-433. Q1.DOI: http://dx.doi.org/10.1016/j.jngse.2016.12.020

74.  Mendhe, V. A, Mishra, S., Varma, A. K., Kamble, A. D., Bannerjee, M., Sutay, T.,2017. Gas reservoir characteristics of the Lower Gondwana Shales in Raniganj Basin of Eastern India. Journal of Petroleum Science and Engineering,149, 649-664. Q1. DOI: http://dx.doi.org/10.1016/j.petrol.2016.11.008

75.  Mishra, V., Bhowmick, T., Chakravarty, S., Varma, A. K.,Sharma, M., 2016. Influence of coal quality on combustion behaviour and mineral phases transformations. Fuel,vol.186, 443-455. Q1.DOI: http://dx.doi.org/10.1016/j.fuel.2016.08.092

76.  Hazra,B. , Varma, A. K., Bandopadhyay, A. K., Chakravarty, S., Buragohain,J., Samad, S. K., Prasad ,A.K.,2016. FTIR, XRF, XRD and SEM characteristics of Permian shales, India. Journal of Natural Gas Science & Engineering Vol.32,239-255. Q1.DOI: https://doi.org/10.1016/j.jngse.2016.03.098

77. Mendhe, V.A., Misra, S., Varma. A.K, Singh,A.P.,2016. Coalbed methane-produced water quality and its management options in Raniganj Basin, West Bengal, India, App Water Sci DOI 10.1007/s13201-015-0326-7. pp1-9.

78. Hazra,B. Varma,A.K., Bandopadhyay,A.K., Mendhe,V.A., Singh,B.D., Saxena,V.K., Samad,S.K., Mishra,D.K., 2015. Petrographic insights of organic matter conversion of Raniganj basin shales, India. International Journal of Coal Geology ,Vol.150-151, 193-209.Q1. DOI:10.1016/j.coal.2015.09.001

79. Kumar, A., Saxena,V. K., Varma, A. K., Tiwari. H. P., Kumar, A., 2015. Effect of dilation of coal blend on push force and coke quality in stamp charged coke making process. International Journal of Engineering Sciences & Research Technology, 4 (11),638-644.

80.  Varma. A.K, Biswal S., Hazra, B., Mendhe, V.A., Misra, S., Samad,S.K., Singh,B. D., Dayal, A.M, Mani, D.,2015. Petrographic characteristics and methane sorption dynamics of coal and shaly-coal samples from Ib Valley Basin,Odisha, India. Int.J. Coal Geol. Vol.141-142, 51-62. Q1.DOI: https://doi.org/10.1016/j.coal.2015.03.005

81.  Varma. A.K, Hazra, B., Mendhe, V.A. Chinara,I and Dayal, A.M. 2015. Assessment of organic richness and hydrocarbon generation potential of Raniganj Basin Shales, West Bengal, India, Marine and Petroleum Geology, 59, 480 -490. Q1.DOI: https://doi.org/10.1016/j.marpetgeo.2014.10.003

82. G. Predeanu, C. Panaitescu, M. B˘al˘anescu, G. Bieg, A. G ´omez Borrego, M.A. Diez, P. Hackley, B. Kwiecinska, M. Marques, M.Mastalerz, M.Misz-Kennan, S. Pusz, I. Su´arez Ruiz, S. Rodrigues, A.K. Singh, A.K. Varma,Zdravkov, D. Životić 2015. Microscopical characterization of carbon materials derived from coal and petroleum and their interaction phenomena in making steel electrodes, anodes and cathode blocks for the microscopy of carbon materials working group of ICCP. International Journal of Coal Geology ,139, 63-79. Q1.

83.  Varma. A.K, Hazra, B., Samad, S.K., Panda, S. and Mendhe, V.A., 2014. Methane sorption dynamics and hydrocarbon generation of shale samples from West Bokaro and Raniganj basins, India. Journal of Natural Gas Science & Engineering, vol.21, 1138-1147. Q1.DOI: https://doi.org/10.1016/j.jngse.2014.11.011

84.  Varma. A K, Hazra,B., and Srivastava, A..,2014.Estimation of total organic carbon in shales through color manifestations. Journal of Natural Gas Science & Engineering ,vol.18, 53-57. Q1. https://doi.org/10.1016/j.jngse.2014.01.014

85. Varma. A K, Hazra,B., and Srivastava, A.,2014.Corrigendum to “Estimation of total organic carbon in shales through color manifestations. Journal of Natural Gas Science & Engineering ,vol.20, 1. Q1.

86.  Varma. A K,.Kumar,M., Saxena, V.K., Sarkar,A. and Banerjee, S.K.,2014.Petrographic controls on combustion behavior of inertinite rich coal and char and fly ash formation, Fuel,vol.128, 199-209. Q1. DOI: https://doi.org/10.1016/j.fuel.2014.03.004

87. Ray, S.K., Panigrahi, D.C. and Varma,A.K., 2014. An electro-chemical method for determining the susceptibility of Indian coals to spontaneous heating,

International Journal of Coal Geology vol.128-129,68-80. Q1.

DOI: 10.1016/j.coal.2014.04.008

88. Varma. A K, Banerjee,S. K. and Sen, D.,2013. Petrographic characterization and rank evaluation of coal seams belonging to Korba basin, Chhattisgarh, India, International Journal of Applied and Natural Sciences, International Academy of Science , Engineering and Technology (IASET), Vol.2, Issue 4,117-124.

89. Varma ,A.K., Mendhe V. A and Singh A. K.2006. Measurement of permeability with gas/liquid whole core permeameter and porosimeter in coalbed methane exploration. ICCP News,No.37, 29 pp.

90. Varma, A.K.,2005.Kinetic studies of carbon dioxide sequestration on coal samples with Intelligent Gravitymetric Analyser. ICCP News,No.36, pp 57-58.

91. Varma, A K 2002. Thermogravimetric investigations in prediction of coking behaviour and coke properties derived from inertinite rich coals. Fuel, vol. 81, No. 10,pp 1321-1334. Q1.

92.  International Committee for Coal and Organic Petrology (ICCP), 2000. The new inertinite classification (ICCP System 1994), Fuel, vol.80, pp.459-471. Q1.DOI: https://doi.org/10.1016/S0016-2361(00)00102-2

93.  International Committee for Coal and Organic Petrology (ICCP), 1998.The new vitrinite classification (ICCP System 1994),Fuel,vol.77 No.5,pp.349-358. Q1.DOI: https://doi.org/10.1016/S0016-2361(98)80024-0

94. Varma, A K 1996. Facies control on the petrogtraphic composition of inertitic coals. International Journal of coal Geology, V. 30 (1996) 327-335 (special volume Coalification and Coal Petrology). Q1.

95. Varma, A K 1996. Influence of petrographical composition on coking behaviour of inertinite rich coals. International Journal of Coal Geology, V. 30 (1996), 337-347 (Special volume on Coalification and coal Petrology). Q1.

96.  Gabzdyl, W. and Varma, A K 1992. Mean reflectance of Vitroplast – a significant character of hydrogenation residue. Fuel, V. 71. pp 476-479. Q1.DOI: https://doi.org/10.1016/0016-2361(92)90044-O

97. Gabzdyl W. and Varma, A K 1993. Thermogravimetric studies in prediction of coal behaviour during coal liquefaction. Journal of Thermal Analysis, V. 39, pp. 31-40. Q1.

98. Varma, A. K. 1990.Warunki geologiczne występowania i charakterystyka petrograficzno-chemiczna węgli induyjskich,Prezegląd Górniczy, v. 46, nr, 7-8, pp. 1-13.

99. Varma, A K 1992. Petrology of the residues after Hydrogenation of inertinitic coals. Prace Kmisji Naukowych, PAN zeszyt nr. 16, p. 108.

100. Varma. A K 1989. Geological petrographic characters of coals from Jharia and Raniganj coalfields in India. Prace Komisji Naukowych, Zeazyt nr. 14. Polska Academia Nauk, p. 44.

International Conferences:

1. Gabzdyl, W. and Varma, A K 1991. Influence of petrographical factors on hydrogenation of inertinite rich coals from the Upper Silesian Coal Basin of Poland. Proceedings of 1991 International Conference on Coal Science, Newcastle upon Tyne, UK, pp. 719-722.

2. Varma, A K 1997. Microstructural and microtextural investigations of cokes derived from inertinite rich coals. Proceedings ICCS 97. 9th International Conference on Coal Science held at Essen, Germany during September 7-12, 1997 (Ed. A Ziegler, K H.van Heek, J Klein and W. Wangzl), Vol II, pp 697-700 DGMK Tagungsberichte, 9703

3. Varma, A K 1993. Reflectance studies of hydrogenation residue derived from inertinitic coals. Proceedings of 7th International Conference on Coal Science, Banff, Alberta, Canada, Vol I, pp 582-585

4. Varma, A K 1992. Influence of petrographical composition on coking behaviour of inertinite rich coals, 29th international Geological Congress, Kyoto, Japan, Abstracts, vol 3, 82.

5. Varma, A K 1992. Facial controls of petrographic composition of inertinitic coals. 29th International Geological Congress, Kyoto, Japan, Abstracts, Vol 3, p 825.

6. Varma, A K 1996. Petrographic investigations of liquefaction residue obtained from inertinite rich coals. Abstracts volume 2 of 3, 30th International Geological Congress, 4-14. August 1996. Beijing, China, p. 887.

7. Varma, A K 1996. Thermogravimetric studies in prediction of coking behaviour of inertinite rich coals. Abstracts volume 2 of 3, 30th International Geological Congress, 4-14, August 1996. Beijing, China, p. 890.

8. Varma, A K 1994. Geological and petrological controls on coal liquefaction. Proceedings of the International symposium on coal and organic petrology. Fukuoka, Japan, Nov. 16-18, 1994. pp 70-73.

9. Varma, A K 1995. Inertinite rich coals as source for petroleum. First International Petroleum Conference and Exhibition (PETROTECH-95). Abstract volume, p. 269.

10. Varma, A. K 1991. Presented a research paper entitled “Petrology of the residues after hydrogenation of inertinite coals”, Scientific Commission, Polish Academy of Sciences , Prace Kmisji Naukowych, PAN zeszyt nr. 16, p. 108.

11. Mazumdar, S and Varma, A K 2000. Sorption isotherm for coal bed methane exploration – a case study from Jharia coal Basin, Bihar, India In. D C Panigrahi (Ed) Mine Environment and ventilation. 145-149 pp Oxford & IBH.

12. Varma, A K, Singh, P and Singh, A K 2002. Petrographic conditions for coal bed methane exploration in Barakar Formation coal seams of East Bokaro and North Karanpura coalfields, Jharkhand, India , International conference on “Emerging concepts in Organic petrology & Geochemistry,A1.3.4, 31st August-4th September, 2002, Banff , Alberta, Canada .

13. Varma, A K,. Saxena, V K and Choudhary,A. 2001.Petrographic characterisation of coal seams from Karharbari, Barakar and Raniganj Formations- Studies from Giridih and Jharia Coalfields, Jharkhand, India, ICCAMB- 2001. International conference on challenges in Coal and Mineral Beneficiation, December 7-8, Dhanbad (India), Tata MC Graw-Hill publishing company, New Delhi, pp. 195-202.

14. Varma,A K and Mazumdar, S. 2001. Cleat pattern and petrographic investigations of some coal seams in Jharia coalfield, India for coal bed methane. In: Coal bed Methane prospects and potentialities, Proc. vol. Int. Sem,1999, SAAEG(South Asian Association of Economic Geologists), pp 131-140.

15. Singh, P., Varma, A. K. and Saxena, V.K. 2003. Petrographic characterisation of various coal seams belonging to different geological periods. Submitted for presentation and publication at International Conference on “Processing on Gondwana coals challenges and solutions” held at Kolkatta during February 21-22,2003.

16. Varma, A. K., 2000, Thermogravimetric investigations in pridiction of coking properties and coke structures of inertinite rich coals, 31st International Geological Congress Rio de Janeiro.

17. Varma, A. K., 2000. Mineral phases in hydrogenation residue, 31st International Geological Congress Rio de Janeiro.

18. Varma, A.K. and Kumar, M., 2004. Petrographic aspects of coal combustion.

32nd International Geological Congress held from 20-28th August 2004 at

Florence, Italy (abstract published).

19. Shalini Gautam, V.K., Saxena, V.K., Sharma, T. and Varma, A.K., 2005. Influence of moisture and stamping on coke strength, In: Proc. International Seminar on Mineral Processing Technology [MPT-2005] held at Indian School of Mines, Dhanbad during 6-8 January 2005, Tata McGraw-Hill Publishing Company Limited, New Delhi, 325- 332.

20. Varma, A.K., Kumar, B.N., Saxena, V.K. and Sarkar, A. 2005. Petrographic controls for solvent extraction of coal, In: Proc. International Seminar on

Mineral Processing Technology [MPT-2005] held at Indian School of Mines, Dhanbad during 6-8 January 2005, Tata McGraw-Hill Publishing Company Limited, New Delhi, 319-324.

21. Varma,A.K.,Mishra,S.2005.Geological and petrographic characterisation for phosphorous distribution in some coal seams of Jharia coalfield,

Jharkhand,India.57th Annual Meeting of the International Committee for Coal and Organic Petrology-ICCP. Abstracts. 18-23rd September,2005,Patras,

Greece.pp22.

22. Mendhe, V.A., Singh, A.K., Sinha, A.and. Varma,A.K., 2006. Geological characterisation of coal seams for coalbed methane reservoir with special reference to Cambay basin., Proc. 1st Asian Mining Congress,MGMI,Kolkata, India, pp 577-583

23. Varma,A.K., Mohanta A., Singh,A.K., MendheV.A., Asthana D., and Venkatesh,A.S., 2007. Geological and petrographic investigations for carbon dioxide sequestration in Rajmahal Traps of Birbhum, West Bengal. In:Gurdeep Singh, D.Laurence and K.Lahiri-Dutt (Eds) Proc.1st Int.Conf. Managing the Social and Environmental Consequences of Coal Mining in India, New Delhi,19-21 November,2007,743-750.

24. Varma, A.K., Choudhary R., Singh, A.K., Singh, H.R., Mendhe, V.A. and Saxena, V.K., 2007. Geological and petrographic investigations for coalbed methane reservoir characterization– a case study from Raniganj coalbasin, west Bengal, India,Int.Conf.,ISMU,Dhanbad,published in Abstracts, International Conference on Present Status and Future Trends in Petroleum Industry,PEGJP 07, ISMU, Dhanbad, 6-8 December,2007, 49-50pp.

25. Varma, A.K., Choudhary R., Singh, A.K., Singh, H.R., Mendhe, V.A. and Saxena,V.K., 2009. Use of petrographic aspects for coal bed methane reservoir

modeling– a case study from Raniganj coal basin, West Bengal, India, In: D.C. Panigrahi (Ed) 9th International Mine Ventilation Congress, 45-54pp , Technical papers: Poster Session, 10-13 November, 2009.

26. Varma,A.K., Kumar, M.,Saxena,V.K. and Sarkar, A. 2010. Petrographic applications in prediction of combustion behaviour of inertinite rich coal and char and flyash formation, TSOP Meeting, 12-16 September, 2010, Denver, USA.,27pp.

27. Saxena,V.K., Varma,A.K., Ahirwar, N and Mendhe,V.A., 2010. Technological characterization of selected coal seams for estimation of potentiality of coal bed methane – case studies from east and west Bokaro coalfields, Jhakhand, India TSOP Meeting, 12-16 September, 2010, Denver, USA,25pp.

28. Saxena,V.K., Varma,A.K. and Kumar, G.,2010. Effect of stamping and binder on coke quality of LVMC coal. In: R.Singh, A.Das, P.K.Banerjee, K.K.Bhattacharyya, N.G.Goswami (Eds) Proc. XI International Seminar on Mineral Processing Technology,Jamshedpur, 15-17 December, 2010,Allied Publishers Pvt Ltd, New Delhi, pp489-497.

29. Varma,A.K.,2011. Nanopore Evolution and petrographic composition of coals for Coal MineMethane. First Indo-US Workshop on Coal Mine Methane, sponsored by United States Environment Protection Agency,Published by Cygnus.Kolkata,141-147.

30. Varma,A.K., Chinara,I., Mendhe,V.A. and Singh,B.D.,2011. Hydrocarbon Generation Evaluation Through Rock Eval Pyrolysis-Case Study Of Raniganj Coal Basin, West Bengal, India.In:Eds O.P.Varma,B.C.Sarkar,A.K.Varma,M.K.Mukherjee, S.Singh (Eds) New Paradigms of Exploration and Sustainable Mineral Development: Vision 2050; Nov.10-12,2011, pp 475-484

31. Gluyas, J., Davies, R., Sarkar,B.C., Varma, A.K., Craig, Jonathan &Thusu, B., 2011. A Holistic Approach to the Exploitation of Geoenergy Resources with Reference to the Gondwana Basin India. In: 17th Convention of Indian Geological Congress and International Conference on New Paradigms of Exploration and Sustainable Mineral Development: Vision 2050, Nov.10-12,2011, Abstract,659p.

32. Varma,A.K., Kumar,S., Mendhe,V.A. and Saxena,V.K.,2011. Petrographical Controls for Coal Bed Methane –A Case Study from Son Valley Coal Basin. In: 17th Convention of Indian Geological Congress and International Conference on New Paradigms of Exploration and Sustainable Mineral Development: Vision 2050,Abstract, Nov.10-12,2011,47p.

33. Varma,A.K., Panda,S. and Mendhe,V.A. 2011. Organo-Geochemical and Petrographical Characterization For Shale Gas Exploration- A Case Study From West Bokaro Coal Basin, Jharkhand, India. In: 17th Convention of Indian Geological Congress and International Conference on New Paradigms of Exploration and Sustainable Mineral Development: Vision 2050, Abstract, Nov.10-12,2011, 49p.

34. Varma,A.K., Chinara,I., Mendhe,V.A. and Hazra,B.,2012. Estimation of Carbon Dioxide Storage-A Case Study of Raniganj Coal Basin, West Bengal, India. CO2ReMoVe Closing Conference IFP Energies nouvelles, Rueil-Malmaison, France ■ 29 February 2012.

35.  Kant, U., Saxena, V. K., Sarkar , A. . Varma,A. K., Mishra, K K., 2012. Characterization of Coal ash from a Captive Power plant for Potential End uses, Proceedings of the EUROCOALASH 2012 Conference, Thessaloniki Greece, September 25-27 2012,pp 1-14 http://www.evipar.org/innet/files/EUROCOALASH2012/Docs/slides/010_Kant_et_al_EUROCOALASH2012-paper.p...

36. 36. Varma,A. K., Khatun, M., Mendhe, V. A., Saxena, V. K., Singh, B. D., Dayal, A. M. and Hazra, B.,2012. Petrographic aspects of shale gas –a case study from Raniganj Coal Basin. International Workshop on Exploration and Exploitation of Shale Gas, NGRI,Hyderabad, 19-20 December2012,Abstracts 8p.

37.  Kant , U., Saxena, V K, A, Sarkar , Varma .Atul K and Mishra,K K. 2012. Characterization of Coal ash from a Captive Power plant for Potential End uses, Proceedings of the EUROCOALASH 2012 Conference, Thessaloniki Greece, September 25-27 2012,pp1-14; http:// www.evipar.org; URL https://www.academia.edu/88495107/Characterization_of_Coal_ash_from_a_Captive_Power_plant_for_Potent...

38. Panigrahi , D.C.and Varma, A. K., 2013.Petrograhical and Technological Controls of Shale Gas and their Environmental Implications. World Petrocoal Congress 2013, 15-17 February,2013, New Delhi. Keynote Presentation

39. Varma,A.K., Hazra,B.,Mendhe,V.A. Chinara,I.,2013. Organic Richness of Raniganj Shales From Raniganj Basin, India for Hydrocarbon Generation

Abstract Published and paper presented at Annual General Meeting of the Geological Society of India and International Conference on “FUTURE CHALLENGES IN EARTH SCIENCES FOR ENERGY AND MINERAL RESOURCES (ESEMR 2013) from 14-16 November 2013,Indian School of Mines, Dhanbad,p117.

40. Mendhe,V.A. ,Das,P.R.,Varma,A.K., Hazra,P.N., 2013. Investigation on Desorption Parameters of Coal Seams in South-Eastern Part of Jharia Coalfield, Jharkhand Abstract Published and paper presented at Annual General Meeting of the Geological Society of India and International Conference on “FUTURE CHALLENGES IN EARTH SCIENCES FOR ENERGY AND MINERAL RESOURCES (ESEMR 2013) from 14-16 November 2013,Indian School of Mines, Dhanbad,p118.

41. Varma,A.K., Banerjee,S.K.,and Saxena,V.K.,2013. Petrographic Appraisal of Coal Seams From Korba Basin, Chhatisgarh, India. Abstract Published and paper presented at Annual General Meeting of the Geological Society of India and International Conference on “FUTURE CHALLENGES IN EARTH SCIENCES FOR ENERGY AND MINERAL RESOURCES (ESEMR 2013) from 14-16 November 2013,Indian School of Mines, Dhanbad,p.116.

42. Varma,A.K., Hazra,B.,Mendhe,V.A. Chinara,I.,2013. Hydrocarbon Generation Potential of Shales from Raniganj Basin, West Bengal,India. Paper presented at International Seminar on Mineral Processing Technology (MPT-2013),Proceedings of International Seminar on Mineral processing Technology (MPT-2013),10-12 December,2013 vol.I. pp 12-14.

43. Varma,A.K., Banerjee,S.K.,and Saxena,V.K.,2013. Coal Beds of Korba Coalbasin: Geological and Petrographic Assessment. Paper presented at International Seminar on Mineral Processing Technology (MPT-2013),International Seminar on Mineral processing Technology (MPT-2013),10-12 December,2013,Abstract Volume pp9-10.

44. Varma,A.K., Banerjee,S.K., Debadatta Sen, Bodhisatwa Hazra, Vinod Kumar Saxena and Bhagwan D. Singh. 2014. Petrographic controls on coal seams from Korba basin, Chhattisgarh, India for char development.66th Annual Meeting and Symposium of International Committee for Coal and Organic Petrology [ICCP-2014], Science City, Kolkata, 20-27 September, 2014, Abstract volume,p.61.

45. Varma,A.K., Hazra,B., Suresh Kumar Samad, Sneha Panda, Vinod Atmaram Mendhe and Satbeer Singh 2014. Shale gas potential of lower Permian shales from Raniganj and West Bokaro basins, India. 66th Annual Meeting and Symposium of International Committee for Coal and Organic Petrology [ICCP-2014], Science City, Kolkata, 20-27 September, 2014, Abstract volume p.40-41.

46. Boral,P.,Maity,S. and Varma,A.K 2014.Evaluation of nitration effect on petrographic characteristics of coals from Jharia coalfield,India, by FTIR and wide angle X-ray scattering. 66th Annual Meeting and Symposium of International Committee for Coal and Organic Petrology [ICCP-2014], Science City, Kolkata, 20-27 September, 2014, Abstract volume,p.72.

47. Mishra,S., Mendhe,V.A., Kamble, A., Bannerjee,M. and Varma,A.K.2015. Prospects of Lower Gondwana shale gas exploitation in Raniganj Coalfield, West Bengal , International Conference on “ Current perspective and emerging issues in Gondwana evolution, February 19-20,2015, BSIP, Lucknow.p.1

48. Varma, A.K., Misra, S., Chakrabortty, S., Das, S.K. , Hazra, B., Patil, D.J,, Singh B.D., Biswas, S. , Samad, S.K.,2015. Effect of igneous intrusion on hydrocarbon generation behavior of coal seam in Jambad area, Raniganj basin, India., In: J. Kus, P. David, S. Kalaitzidis, H-M. Schulz & R.F. Sachsenhofer (Eds.). ICCP Program & Abstract Book. 67th Annual Meeting of the International Committee for Coal and Organic Petrology, September 5-11. 2015, Potsdam, Germany. Schriftenreihe der Deutschen Gesellschaft für Geowissenschaften Heft 87, 65.

49. Sahoo,S.K., Suresh,N., Varma,A.K. 2016. Studies on separation of macerals from coal by froth flotation. Paper presented at International Seminar on Mineral Processing Technology (MPT-2016),Proceedings of International Seminar on Mineral processing Technology (MPT-2016),5-7 January,2016 pp 98-109.

50. Varma A.K., Mishra,D.K., Mendhe, V.A., Samad, S. K. .2016.Hydrocarbon Generation Potential of Shale gas from Auranga Basin, Jharkhand. Poster Presentation at 6th World PetroCoal Congress 15-17 February 2016, New Delhi, India.

51. Varma A.K., Biswas,S., Misra,S., Hazra,B.,2016. Organo-petrographic studies for hydrocarbon generation, storage and depositional environment of coal and shale in Barjora area, West Bengal, India, Presentation at 35th International Geological Congress, Cape Town, South Africa (Record no.35 IGC/3888)

52. Varma A.K., Mishra,D.K., Biswas,S., Samad, S. K., Mendhe, V.A., 2016. Geochemical, Mineralogical and Pore structure of Shales from Auranga basin, Jharkhand, India. 35th International Geological Congress,Cape Town, South Africa (Record no.35 IGC/4255).

53. Sahoo, S.K., Suresh,N., Varma,A.K. 2017.Textural analysis procedure of petrographic images for recognition and characterisation of Minerals. XVI International Conference on Mineral Processing Technology,MPT- 2017 held during 1-3 Feb 2017, Chennai Book of Abstracts,p.256.

54. Sahoo, S.K., Suresh,N., Varma,A.K. 2017.Correlation between average gray value (AGV) of froth image and its ash content. XVI International Conference on Mineral Processing Technology,MPT- 2017 held during 1-3 Feb 2017, Chennai, Book of Abstracts,p.255.

55. Sahoo, S.K., Suresh,N., Varma,A.K. 2017.Characterization of flotation froth fraction by using traditional KBr-FTIR spectroscopy. XVI International Conference on Mineral Processing Technology,MPT- 2017 held during 1-3 Feb 2017, Chennai Book of Abstracts,p.257.

56. Sahoo, S.K., Suresh,N., Varma,A.K. 2017.Application of Neural Network for classification of coal macerals. XVI International Conference on Mineral Processing Technology,MPT- 2017 held during 1-3 Feb 2017, Chennai Book of Abstracts,p.254.

57. Varma,A.K., Balram Tiwari , Ashutosh Mondal , Vinod Atmaram Mendhe, Amit Kumar Verma , Susheel Kumar,2017. Thermal maturity and hydrocarbon potential of shales from the Jharia coal basin, Jharkhand, India. World Petrocoal Congress 2017, International Conference and Exhibition, 15-17 February 2017 at Convention Centre- NDCC, Parliament Street, New Delhi. Theme: - Petroleum-Coal-Gas: Sustainable Management of the Future Energy Mix.

58. Anwita, Sangwai, J., Varma,A.K., 2017 Effects of anionic surfactant on coals for investigation of viscosity and flow behavior of coal water suspension. World Petrocoal Congress 2017, International Conference and Exhibition, 15-17 February 2017 at Convention Centre- NDCC, Parliament Street, New Delhi. Theme:- Petroleum-Coal-Gas: Sustainable Management of the Future Energy Mix.

60. Hazra,B., Varma,A.K., Mendhe,V.A. and Buragohain,J. 2017. Shale gas potential, methane sorption capacity and petrographic characteristics of Raniganj basin shales, India. NexGen Technologies for Mining and Fuel Industries,New Delhi, pp 1383-1392.

61. Mendhe,V.A., Mishra,S., Bannerjee,M., Kumar,S.,Singh,H., Khangar, R., Varma,A.K. and Kamble,A.D.,2017. Evaluation of thermal maturity pore structure and behavior of gas transport in Permian shale beds of Jharia basin, Jharkhand. NexGen Technologies for Mining and Fuel Industries,New Delhi, pp 1397-1408.

62.Bodhisatwa Hazra_and Atul Kumar Varma, 2017. Hydrocarbon Generation Potential and Petrographic Characteristics of Shales from the Raniganj Sub-basin, Damodar Basin, India., Proc. International Workshop on Indian Shale Oil and Gas Exploration; organized by the Department of Earth Sciences at the Annamalai University (Tamil Nadu) in January 2016;97-103.

63. Varma,A.K., , Ghosh,S., Patil, D. J ., Mani, D. and Biswas, S., 2017.Effects of tectonism on the organic matter of coal from Sikkim, India: Insights from petrography and geochemical proxies. Goldschmidt2017 Abstract., 13-18 August,2017,Paris, France

64. Ojha A, Sangwai, J and Varma,A.K., 2017. The Effect of Dispersing and Stabilizing Additives and the Rheology of Resulting Suspension Slurry. Goldschmidt2017 Abstract., 13-18 August,2017,Paris, France. https://goldschmidt.info/2017/abstracts/abstractView?id=2017004274

65. Varma,A.K., Biswas, S., Patil, D. J ., Mani, D. 2017. Organogeochemical proxies for hydrocarbon generation from coal,India. GSA Annual Meeting in Seattle, Washington, Geological Society of America, Nov. 2017 Abstracts and Programs, Vol.49,No.6.doi:10,1130/abs/2017AM-294869.

66. Mishra, V., Biswas, R. D., Chakravarty, S., Varma,A.K., 2017. Concentration and Distribution of Microelements from Talcher Coal Basin, India. International Seminar on Mineral Processing, XVI MPT, Chennai, 1-3 Feb 2017 India, pp1-6.

67. Varma,A.K., Biswas, S., Patil, D. J ., Mani, D. Ghosh,S.,2017. Organogeochemical and petrographical- investigations for hydrocarbon generation of coal and shale from Makum coal basin, Assam, India. 69th Annual Meeting of the International Committee for Coal and Organic Petrology, Romanian Academy Library, Bucharest, Romania, SDGG Heft 92: 59-60p.

68. Varma,A.K., Ghosh,S., Patil, D. J ., Mani, D. Biswas, S., 2017. Effects of tectonic activities on the organic matter of coal from Sikkim, India: Insights from petrography and geochemical proxies. 69th Annual Meeting of the International Committee for Coal and Organic Petrology, Romanian Academy Library, Bucharest, Romania, SDGG Heft 92: 61-62p.

69. Varma,A.K., Biswas,S., Tiwari,B., 2018. Influence of maceral reactivity on hydrocarbon generation of coal and shale from Makum coal basin, India. In: Shifeng Dai & Yuegang Tang (Editors), program & Abstracts, Vol.35, 35th TSOP Annual Meeting,China University of Mining and Technology (Beijing),August 17-21,2018,Beijing,China,pp 111-112.

70. Varma,A.K., Tiwari,B.,Mondal,A.,Mendhe, V.A., Biswas,S., 2018.Geochemical, petrographical and thermal characteristics of Barren Measures shales of Jharia coal basin,India and their implications for hydrocarbon generation and production. In: Shifeng Dai & Yuegang Tang (Editors), program & Abstracts, Vol.35, 35th TSOP Annual Meeting,China University of Mining and Technology (Beijing),August 17-21,2018,Beijing,China,pp 113-114.

71.Ghosh,S., Varma,A.K.,Patra,S., Dirghangi,S.S.,Mendhe,V.A. and Mukherjee,S., 2018.Optical and macromolecular investigations of the coals from Himalayan fold thrust belts, Sikkim, India: a target to produce artificial graphite for nuclear reactors and activated carbons. XVII International Seminar on Mineral Processing Technology, MPT-2018, 10-12 October 2018, Dhanbad, India, Abstract p.111. Proceedings pp1-8.

72. Sahoo,A., Varma,A.K., 2018.Maceral and geochemical characteristics of coal seams of Ib Valley coal basin, Odisha, for oil and gas generation. XVII International Seminar on Mineral Processing Technology, MPT-2018, 10-12 October 2018, Dhanbad, India, Abstract p.103, Proceedings pp1-12.

73. Boral,P., Maity S., Singh, A K., Varma, A. K., 2018. Structural characterization of selected Indian coal by wide angle X-ray scattering and its correlation with petrographic rank parameter, 70th Annual Meeting of ICCP, September 23-29, 2018, Brisbane, Australia p. 24-25.

74. Boral,P., Maity S., Singh, A K.,Singh,P.K., Varma, A. K., 2018. Effect of Nitration on Indian Bituminous Coals: a Study by X-ray Diffraction and FT-IR Techniques. 2018International Pittsburgh Coal Conference Xuzhou, Jiangsu Province, CHINA,October 15 - 18, 2018.

75.Ghosh, S., Varma, A.K., Mukherjee, S., 2019. “Microbial alteration of thermogenic coal bed gas of Raniganj Basin India: A future quest for microbially enhanced methane production.” At: “International Conference and Exhibition on Energy and Environment: Challenges and Opportunities”, New Delhi, India (Poster presentation; February 19 – 24, 2019).

76.Varma, A.K., Tiwari, B., Samad, S.K., Mendhe, V.A., 2019 “Petrographic and geochemical characterization of Barren Measures shales from Jharia Coal Basin, India.” At: “International Conference and Exhibition on Energy and Environment: Challenges and Opportunities”, New Delhi, India (Poster presentation; February 19 – 24, 2019).

77. Varma, A.K., Samad, S.K., Tiwari, B., Misra, S., Mishra, D.K., Hazra, B., 2019.“Comparative study of hydrocarbon generation behaviour of Gondwana Basins of India.” At: “International Conference and Exhibition on Energy and Environment: Challenges and Opportunities”, New Delhi, India (Poster presentation; February 19 – 24, 2019).

78. S. Biswas, A. Varma, M. Kumar and D. Mani,2019. Hydrocarbon Generation Potentiality of Tertiary Shales from Makum Basin, Assam, India. 81st EAGE Conference and Exhibition 2019, London, Poster: Unconventional A, 03 June 2019; DOI: 10.3997/2214-4609.201901107

79. Sahoo,A., Varma,A.K., Saikia, B.K. and Das, T., 2019.Organopetrographic Attributes for Carbon Nano-Products Formation from Coal-A., Case Study From Ib Vally Coal Basin, Odisha, India, 71st International Committee for Coal and Organic Petrology, 15-21 September, 2019, The Hague, The Netherlands, Ed. George Siavalas Book of Abstracts,PO-10.

80. Tiwari, B., Varma,A.K., Ojha,A., Ghosh, S., Mendhe, V.A. 2019. Multi-proxy aspects for hydrocarbon potential of Barren Measures shales from the Jharia coal Basin, India., 71st International Committee for Coal and Organic Petrology, 15-21 September, 2019, The Hague, The Netherlands, Ed. George Siavalas Book of Abstracts,PO-04.

81. Santanu Ghosh, Anwita, Atul Kumar Varma, Supriyo Kumar Das, Debayan Pal, Gaurav Solanki.2019. Reactions and stabilization of organic nitrogen moieties and their influence on δ15N parameter in coals., 71st International Committee for Coal and Organic Petrology, 15-21 September, 2019, The Hague, The Netherlands, Ed. George Siavalas Book of Abstracts,PO-08.

82. Adsul ,T., Ghosh, S., Varma,A. K. 2021. Allusions of Raman Spectroscopy on Microstructural Ordering and Thermal Maturity Assessment of Kerogen., 72nd International Committee for Coal and Organic Petrology, 19 – 25 September 2021 in Prague, Czech Republic. Online presentation.

83. Mishra, Divya K., Hackley, Paul C., Jubb, Aaron M. , Agrawal, Shailesh , Atul K. Varma.2021. Maturation study of vitrinite from carbonaceous shales and coal: Preliminary insights from hydrous pyrolysis, 37th TSOP Annual Meeting,Sofia, Bulgaria,September,12-14,2021, pp1-3.

84. Adsul, Tushar, Ghosh,Santanu; Bhattacharyya,S., Konar,R., Varma, Atul K.,2021. Structural and Chemical Upshots with Prograding Coal Rank: A Perspicacity from Spectral Probes, Connects 2021, October 10-13,2021,The Geological Society of America Abstracts with Programs. Vol 53, No. 6, 2021 doi: 10.1130/abs/2021AM-365300

85. Varma, Atul K.; Sen, Debadatta ; Ojha,Anwita; Adsul, Tushar; Ghosh,Santanu; Kumar Susheel, 2022. A spectral probe on thermal maturity and rheology of bituminous coals from nitrogen geochemistry, Abstract Volume, p.21-22, ICCP 2022. New Delhi, 18-25 October,2022.

86. De, Sanjukta; Varma, Atul K.; Sengupta, Debashish. Organic petrography and geochemical analysis to evaluate Cambay Shale in south Cambay Basin, India, for shale gas potential. Abstract Volume, p.36-37, 73rd Annual Meeting of ICCP 2022, New Delhi, 18-25 October,2022.

87. Adsul, Tushar, Ghosh,Santanu; Varma, Atul K.;Bhattacharyya,S., Source and Palaeodepositional Environment of Eocene Meghalaya Coals, India: A Rock Eval and Stable Carbon Minutiae, Abstract Volume, p.58-59, 73rd Annual Meeting of ICCP 2022, New Delhi, 18-25 October,2022.

88. Mishra, Divya, Aggarwal, Neha, Varma, Atul K.,Mendhe, V.A.,2022. Fluvial facies milieu potential for hydrocarbon generation in L. Permian shales of Auranga Coalfield from India, Abstract Volume, p.51-52, 73rd Annual Meeting of ICCP 2022, New Delhi, 18-25 October,2022.

89. Adsul, Tushar, Ghosh,Santanu; Varma, Atul K, Kumar, Susheel,2022. Carbon Dioxide Geo-sequestration: A Scientific Anecdote, AGU Fall Meeting 2022 Conference; DOI: 10.13140/RG.2.2.27337.01120

90. Pranay S. Bawangade, Vinod Atmaram Mendhe, Atul Kumar Varma, 2023.Clean Energy Resource Development – a Case Study of Reservoirs of Coalbed Methane in Mand-Raigarh Basin, Chhattisgarh, India,3rd International Conference on Pure And Applied Chemistry (IconPAC - 2023) Clean Energy Emerging Technologies: Hydrogen, Methanol, Ethanol and Fuel Cells Production Challenges and Issues on 27th to 28th January 2023 pp 18.

91. Tusar Chandra Patel, Vinod Atmaram Mendhe, Satyendra K. Singh, Atul Kumar Varma, 2023,Coalbed methane exploration and reservoir characterization of coal seams of ChurchaRO underground mine, Baikunthpur area, Chhattisgarh, India, 3rd International Conference on Pure And Applied Chemistry (IconPAC - 2023) Clean Energy Emerging Technologies: Hydrogen, Methanol, Ethanol and Fuel Cells Production Challenges and Issues on 27th to 28th January 2023 pp 32.

92. Adsul, Tushar; Varma, Atul K., 2023. Hydrogen Generation and CO2 Storage in Coal,

International Seminar on Petroleum Exploration: Scopes, Prospects, and Strategies with a Special Anecdote on North-East India.

93. Adsul, Tushar; Ghosh, Santanu; O’Beirne, Molly D; Werne, Josef P.; Gilhooly III, William P.:

Houghton, Jennifer; Fike, David; Hackley, Paul C.; Hatcherian, Javian, J.; Varma, Atul K., 2023.

Decrypting palaeomire conditions of superhigh-organic-sulfur –coals from Meghalaya, India, Joint 74th

ICCP and 39th TSOP Meeting, 17-24th September 2023, Patras, Greece, p.44.

94. Hatcherian, Javian, J.; Adsul, Tushar; Hackley, Paul ; Ghosh, Santanu; Varma, Atul K., 2023. Impact of

pyrite -sourced sulfur on catagenesis in gilsonite undergoing hydrous pyrolysis. Joint 74th ICCP and 39th

TSOP Meeting, 17-24th September 2023, Patras, Greece, p.70.

95. G. Predeanu, M. Wojtaszek- Kalaizidi; I. Su´arez Ruiz, S.; M. B˘al˘anescu, A. G omez Borrego, M.A.

Diez; L. Garcia; M.D.Ghiran; P. Hackley; S. Kalaitzidis; J.Kus; D. Mansidor; M.Mastalerz, M.Misz-

Kennan; S. Pusz, S. Rodriguez; G.Siavalas; A.K. Singh; P. Tomillo; A.K. Singh, A. Varma, A;

A.Zdravkov; D. Životić, 2023. Microscopic characterization of carbon materials derived from coal and biomass and their interaction phenomena in making high grade products, Joint 74th ICCP and 39th TSOP Meeting, 17-24th September 2023, Patras, Greece, p.73.

96. Varma, Atul K.; Adsul, Tushar; Ghosh, Santanu, 2025. Unlocking the Secrets of Hidden Hydrogen:

Geological Factors and Their Role, International Conference on “ Exploring the potential of Natural

Hydrogen : A Sustainable Energy Frontier, 10-11 April, 2025, Visakhapatnam, India; Abstract

Proceedings, A7: 9-10.

97. Singh, R.K; Shalivahan; Kumar,K.V.; Varma, Atul K.;2025. Identification of the Promising Zones of

Natural Hydrogen using Petrophysics and Geophysics as Proxies, , International Conference on

“ Exploring the potential of Natural Hydrogen : A Sustainable Energy Frontier, 10-11 April, 2025,

Visakhapatnam, India; Abstract Proceedings, A7: 9-10.

1. “Multi-model method and system of estimation of ash yield in coal using mid-infrared Fourier transform infrared spectroscopy”,  No. 202431065336, Published 06.09.2024.

2. “A method of multi-model estimation of carbon in coal using mid-infrared Fourier transform infrared spectroscopy”, No. 202431076911, Published 18/10/2024.

3. “A novel multi-model method of estimation of the gross calorific value (GCV) in coal using mid-infrared fourier transform infrared spectroscopy", No. 202531012376, Published  28/02/2025.

4. “A method for rapid estimation of phosphorus content in coal and ash using mid-infrared Fourier transform spectroscopy and application of machine learning techniques”, No. 202531033924, Published 11/04/2025.

1. A.K.Varma, A.S. Venkatesh, Y.R.Dhar and V.K.Saxena (Eds), Frontier areas in

geological and technological aspects of fossil fuel and mineral resources (GTFM-2006), Allied Publishers Private Limited, New Delhi, 1-344pp.

2. A.K.Varma, R.K.Dubey, B.C.Sarkar and V.K.Saxena (Eds),2010. Geological and

Technological Facets of CBM, Shale Gas, Energy Resources and CO2 Sequestration.2010. Allied Publishers Private Limited, New Delhi, 1-288+i-xi pp.

3 O.P.Varma, B.C.Sarkar, A.K.Varma,M.K.Mukherjee and S.Singh, 2011. Proceedings of 17th Convention of Indian Geological Congress and International Conference on New Paradigms of Exploration and Sustainable Mineral Development: Vision 2050 (NPESMD2011) during 10-12 November 2011 at ISM, Dhanbad. vii p+pp 1-852.

4.Asthana,D.,Sarangi,S., Varma,A.K. and Singh,S.2013. Abstract Volume. Annual General Meeting of the Geological Society of India and International Conference on “FUTURE CHALLENGES IN EARTH SCIENCES FOR ENERGY AND MINERAL RESOURCES (ESEMR 2013) from 14-16 November 2013,Indian School of Mines, Dhanbad.

1. Varma, A.K.,2006. Four years with my Guru, Prof. W.Gabzdyl. In : K.Probierz,

I.Jonczy and M.Lewandowska (Eds)-PROFESSOR ZW. DR HAB. INŻ. WIESŁAW

GABZDYL-UCZONY,PEDAGOG,ORGANIZATOR NAUKI, GEOLOG I

PETROLOG WĘGLOWY, BADACZ GÓNOŚLĄSKIEGO ZAGŁĘBIA

WĘGLOWEGO, Gliwice, Poland, 67-68p.

2. Varma,A.K., Das, P.R.,Mendhe,V.A, Hazra, B., Samad,S.K. and Buragohain, J. 2015. Hydrocarbon generation potential of selected borehole samples from Jharia basin, Jharkhand, In: Shrivastawa,K.L. & Srivastava,P.K.(Eds), Frontiers of Earth Science, Indian Science Congress Association &Scientific Publishers , Jodhpur, India, pp 222-224

3. Varma,A.K., Sen,D.,Mendhe,V.A, Mishra,D.K., Misra,S.,Anwita and Das, P.R., 2015. Petrographic make up in deciphering depositional environment of Damodar valley coal basins, In: Shrivastawa,K.L. & Srivastava,P.K.(Eds), Frontiers of Earth Science, Indian Science Congress Association &Scientific Publishers , Jodhpur, India,pp 477-480.

4. Varma,A.K 2017." Shale Mineralogy” in A.M. Dayal and D.Mani (Eds) “ Shale Gas: Exploration and Environmental and Economic Impacts" Elsevier Publication, pp 77-93.

5. Varma,A.K., Ghosh,S., 2020. Supercritical carbon dioxide — a glimpse from the modern era of green chemistry In: Inamuddin and Abdullah M. Asiri (Editors) “Advanced Nanotechnology and Application of Supercritical Fluids”, Springer, pp 75- 124.

6.  Ghosh,S.,Adsul, T., Varma,A.K., 2023. Organic Matter and Mineralogical Acumens in CO2 Sequestration, Green Sustainable Process for Chemical and Environmental Engineering and Science: Carbon Dioxide Capture and Utilization; Chapter 26, 561-594, Elsevier; DOI: https://doi.org/10.1016/B978-0-323-99429-3.00016-3

7.  Sanjukta De, Atul Kumar Varma and Debashish Sengupta, 2024. Recent Advances in Well Logging Techniques for Exploration of Shale Reservoirs, In: Boruah, A., Verma, S., Ganguli, S.S. (eds) Unconventional Shale Gas Exploration and Exploitation. Advances in Oil and Gas Exploration & Production. pp 49-67 Springer, Cham. https://doi.org/10.1007/978-3-031-48727-9_4 Springer.

8. Misra,S., Varma,A.K., 2023. Catalytic conversion involving hydrogen from lignin, In: Editor(s):Inamuddin, Tariq Altalhi, Sayed Mohammed Adnan, Mohammed A. Amin

Wiley Scrivener Publishing , Materials for Hydrogen Production, Conversion, and Storage, Chapter 2,pp 41-64.

https://onlinelibrary.wiley.com/doi/book/10.1002/9781119829584

9. Ghosh,S., Varma,A.K., 2023. Geothermal energy-driven hydrogen production systems, In: Editor(s):Inamuddin, Tariq Altalhi, Sayed Mohammed Adnan, Mohammed A. Amin

Wiley Scrivener Publishing. Materials for Hydrogen Production, Conversion, and Storage, Chapter 12,pp 343-395

https://onlinelibrary.wiley.com/doi/book/10.1002/9781119829584

10. Kumar, D., Adsul, T., Ghosh,S., Varma,A.K., 2023. Coal for Hydrogen Production and

Storage, In: Technological Advancements in Solid-Gaseous Biofuels Production, Wiley

Scrivener, Chapter 19. (accepted).

11. Sahoo,A., Adsul, T., Ghosh,S., Varma,A.K., 2023. Microstructural Maneuvering for

Bioenergy Production, In: Technological Advancements in Solid-Gaseous Biofuels

Production, Wiley Scrivener, Chapter 12. pp 299-332.

12. Ghosh,S., Adsul, T., Tiwari, B., Varma,A.K., 2023. Organic Characterization of Mars,

In: Mars World: An Exploration to Chemical Sciences, Elsevier. (accepted).

13. Varma,A.K., 2024. India's Contribution to Coal Petrology through ICCP, Commemorative volume, ICCP, 75th ICCP meeting, pp 211-220.

1. National Mineral Award, 1999
   Awarded by the Government of India in recognition of significant contributions in the field of coal and lignite exploration.

2. Polish Government Scholarship
   Awarded through the Government of India to conduct advanced research on “coal conversion” in Poland.

3. International Geohost Grant, 1992
   Conferred by the 29th International Geological Congress, Kyoto, Japan.

4. Commonwealth Fellowship Award, 2003
   Awarded by the Commonwealth Commission to undertake research in the United Kingdom.

5. COE Invited Research Fellowship, 2008
   Granted by Hokkaido University, Japan.

6. Farthest Travel Award, 2010
   Awarded at the TSOP (The Society for Organic Petrology) Meeting held in Denver, USA.

7. Canara Bank Research Publication Award, 2016
   In recognition of excellence in research publication.

8. IIME Best Paper Award, 2018
   Presented to the team comprising Vivek Mishra, Trisrota Bhowmick, Sanchita Chakravarty, Atul Kumar Varma, and Mamta Sharma for the paper titled “Influence of coal quality on combustion behaviour and mineral phase transformations” at the IIME Conference, Dhanbad (October 10–12, 2018).

9. MGMI Award of Excellence in Earth Science / Mineral Engineering, 2023–24
   Awarded by The Mining, Geological & Metallurgical Institute of India for outstanding contributions to Earth Science and Mineral Engineering.

1. Coordinator, M.Tech. (Petroleum Exploration), Indian School of Mines, Dhanbad

2. Coordinator, M.Tech. (Mineral Exploration) , Indian School of Mines, Dhanbad

3. Hostel Warden, Indian School of Mines, Dhanbad

4. Member of a Committee for Eligibility Criteria for admission to M.Phil. /M.Tech.

courses at Indian School of Mines, Dhanbad

5. Member, Library Committee, Indian School of Mines, Dhanbad.

6. Secretary, Departmental Advisory Committee (DAC), Department of Applied

Geology, Indian School of Mines, Dhanbad.

7. Secretary, Board of Courses of Studies (BOCS), Department of Applied Geology,

Indian School of Mines, Dhanbad.

8. Member, ISM Canteen.

9. Teacher in-Charge, Coal Geology and Organic Petrology Lab., Department of Applied

Geology, Indian School of Mines, Dhanbad.

10. Member, Departmental Research Committee (DRC), Department of Applied Geology,

Indian School of Mines, Dhanbad.

11. Teacher in- charge , ISM Geological Society, Department of Applied Geology,

Indian School of Mines, Dhanbad.

12. Teacher-in-Charge, Library, Department of Applied Geology,

Indian School of Mines, Dhanbad.

13. Convener, Equipment Categorisation Committee, Indian School of Mines, Dhanbad.

14. Tabulator

15. Member, Selection Committee for admission to M.Tech. (Petroleum Exploration), Indian School of Mines, Dhanbad.

16. Member of the Committee assigned for looking into consultancy assignments, Indian School of Mines, Dhanbad.

17. Member of the Committee to review the rules for Minor Research Project, Indian School of Mines, Dhanbad.

18. Member, Standing Committee of DAC for recommending purchase of books.

19. Member and Convener, Moderation Board, M.Tech. (Mineral Exploration)

20. Coordinator, BOCS of 5-year integrated M.Sc.Tech, 3-year M.Sc.Tech and 2-year M.Sc. Courses.

21. Member, Security cum Campus Welfare Committee of ISM.

22. Member of Working Group for taking up collaborative agreements, MoUs with various organizations.

23. Coordinator, Moderation Board M.Tech(MEX)).

24. Chairman, Procedure Recommending Committee for Dead Stock

25. Teacher-in-Charge, Geochemical Lab.

26. Teacher-in –Charge, Rock Cutting Section Lab.

27. Teacher-in-Charge, MPV Microscope Lab.

28. Teacher-in-Charge, Training of students

29. Member, Research Council

30. Member, House Allotment Committee

31. Member, Moderation Board, Petroleum Engg.

32. Member, Academic Council, ISM

33. Chairman, Golden Jubilee Lecture Theatre and Penman Hall

34. Head, Department of Applied Geology, IIT ( ISM),Dhanbad

35. Co-Convener, Basant 2013

36. Convener, Basant 2014

37. Coordinator, DST-FIST Level II/Applied Geology

38. Associate Dean (Students Welfare)

39. Associate Dean (Faculty)

40. Former Member, Board of Governors (BOG), IIT(ISM)

1. Bhattacharya, R.M. An investing,ation into pillar fire problem in bord & pillar method of mining in Raniganj coalfield and categorisation of pillars with respect to their proneness to spontaneous heating (Ph.D. Degree awarded in 2004).

2. Mendhe, V. A. Geologic and petrographic controls on the coalbed methane from coal seams of Northern part of Cambay Basin, Gujarat. (Ph.D. awarded in,2008).

3. Banerjee,S.K. Geological and Petrographic Conditions of Coal Seams for

Char Development- Case Study of Korba Coalfield, Chhattisgarh (Ph.D awarded in

2014; Registration No. 2010/DR/0142)

4. Boral,P. Structural parameters of coals and their modifications by nitric acid treatment from selected Indian coal basins (Ph.D. awarded in 2017).

5. Hazra B.. Geological and Petrographical Facets for Shale Gas- a Case Study of Raniganj Coal Basin, West Bengal,India. (Ph.D. Awarded in 2015)

6. Khangar, Ranjit G. “ Study of Petrographic Facets And Adsorption Behavior of Shale Gas Reservoir In Jharia Basin, India”. Ph.D.awarded vide Notification no.Exam/219905/Ex.Bd/2007-08(vol.III dt 11.07.2022)

7. Mishra, Divya Kumari” Geological and Petrographical Controls on Kerogens for Oil and Gas Generation Attributes Auranga Basin, Jharkhand,India” (Ph.D.awarded vide Notification no.Exam/219905/Ex.Bd/2007-08(vol.III dt 17.09.2018).

8. Kumar,S.”Petrographical Controls and Gas Reservoir Characteristics of Shale Beds- a Case Study of Mand – Raigarh Area, Chhatisgarh,India”. (Admn No. 2014/DR/1018; Ph.D. Awarded vide Notification No. Exam/219905/Ex.Bd/2007-08 (Vol.III) dated 24th August,2020.

9. Subhashree Mishra. Gas Reservoir characteristics of shale beds in Northern Part of Raniganj coal basin, West Bengal,India (2014 DR 1050) (Ph.D Awarded in 2018)

10. Misra, S. Petrographical and Organo-geochemical Studies of Coal and Shale of Raniganj & Barjora Basins, West Bengal, India, (2014/Dr/0041vide notification No.Exam/219905/EX.Bd./2007-08 (Vol.III dated 09th December 2019).

11. Anwita. “Petrographic and Geochemical Controls on Coking and Rheological Behaviour of Bituminous Coals From Raniganj And Jharia Basins, India”( PhD awarded in 2022; 2014DR0119)

12. Samad Suresh Kumar. “Organogeochemical, Petrological and Palaeoclimatological Facades of Shale and Coal for Hydrocarbon Generation and Storage: a Case Study from Auranga Basin, Jharkhand, India”. (Adm. No. 2014DR0175; Ph. D. awarded vide notification No.Exam/219905/EX.Bd./2007-08 (Vol.III dated 07th October 2021).

13. Sahoo, Saroj Kumar. “ Studies on separation of macerals from coal by froth flotation.” (Ph.D.Thesis, 26.06.2018 awarded)

14. Bhowmick, Trisrota. “Mineralogical and Petrographical Characterization of Mineral Rich Non Coking Coals from Lower Gondwana Coal Basins of India”. (Ph.D.awarded vide Notification no.Exam/219905/Ex.Bd/2007-08(vol.III dt 17.09.2018).

15. Vivek Mishra. “Trace Element Geochemistry and Petrographic Investigations of Coal and Shaly Coal from Talchir and Ib valley basins of Odisha, India”. (Ph.D.awarded vide Notification no.Exam/219905/Ex.Bd/2007-08(vol.III dt 09.10.2018)

16. Banerjee, Mollika.2022” Petrographic Controls and Gas Sorption Properties of Coal Seams in East Bokaro Coal Basin, India”. ”. (Ph.D.awarded vide Notification no.Exam/219905/Ex.Bd/2007-08(vol.III dt 25.04.2022)

17. Sanki,B. Petrographic And Geochemical Controls on Coal And Shale for Hydrocarbon Generation From Makum and Barjora Basins of India : Experimental Modeling.( Adm. No. 2015DR0204 ) vide Exam/ 219905/Ex Bd/2007-08/(vol.III) dated 18.02.2021

18. Tiwari,Balram- An insight into organopetrographical geochemical and microstructural characteristics to quench the quest of shale gas and coal bed methane in Jharia Basin, India (Adm.No. 2015DR0027) (Ph.D.awarded vide Notification no.Exam/219905/Ex.Bd/2007-08(vol.III dt 02.07.2021)

19. Ghosh, Santanu.Optical and Geochemical Paradigms of Coal Metamorphism from Bituminous to Anthracite with an Assessing Note on Secondary Microbial Methanogenesis from Bituminous Rank (Adm No. 2016DR0039 vide Exam/ 219905/Ex Bd/2007-08/(vol.III) dated 05..04.2021 ). (No. 1369/Exam/ 2199/ PHD/AGL/ SG/20 dated 19th March,2021).

20. Subir Dutta, Geochemical characterization of Eocene age Tharad Lignite deposits and associated seam gas, Sanchor Sub-Basin, Gujarat, India (Ph.D Awarded Vide Exam 219905/Ex.Bd/ 2007-08(Vol.III dated 17.10.2023

21. Kumari Preety,2022. Assessment of Vertical Accuracy, Relative performance, and Enhancement of Space-Based Digital Elevation Models (DEMS) Using Differential Global Positioning System (DGPS) vide Exam/ 219905/Ex Bd/2007-08/(vol.III) dated 05.09.2022 ).

22. Ghosh, Bablu, 2023. Petrographic Controls on Carbonisation for Coke Formation. (Ph.D Awarded Vide

23. Dinesh Kumar (Adm No. 17DP000259)2023. Petrological and Geochemical Settings for Hydrocarbon Attributes on Palaeogene Organic Sedimentary Archives of Bikaner-Nagaur Basin, Rajasthan, India PhD Awarded Vide

24. Mr. Akhandal Sahoo, 2023 (Adm No. 2015DR0105). Petrographic Controls on

Carbon Nano-products Formation, Ph.D Awarded Vide

25. Das , Piyush Ranjan, 2023 “Petrographic Controls on Coal Bed Methane of Jharia Coal

Basin, Jharkhand, India”. (Ph.D Awarded Vide Exam 219905/Ex.Bd/ 2007-08(Vol.III dated

03.04.2023

26. Mr. Anubhav Shukla,2023. (Adm. No.: 17DR000435),’Rapid Estimation of Sulfur In Indian Coal Using Mid-Infrared FTIR Spectroscopy and Modeling of Gross Calorific Value, and Carbon Nanoproducts’.Ph.D Awarded Vide 2236/Exam/2199/PhD/AGL/AS/23 dated 15.09.2023.

27. Mr. John Buragohain. 2024. (Adm No. 2011DR0140). Cleat and Fracture Studies of Coal Seams from Raniganj Basin, India for Evaluation of Gas Reservoir Permeability Ph.D Awarded Vide 2389/Exam/2199/PhD/AGL/JB/23 dated 06.06.2024.

28.Adsul Tushar Prakash,2024. Petrological and Geochemical Niceties of Organic Matter and its Interplay with Sulfur Moieties in Paleogene Superhigh-Organic-Sulfur Coals of Meghalaya, India with A Brief Note on the Organic Matter Sulfurization Mechanism .

Lectures delivered outside the Campus at :

a) Institute of Applied Geology, Silesian Technical University, Gliwice, Poland.

b) Polish Academy of Sciences, Poland.

c) Jadavpur University, Calcutta, India.

d) Binoba Bhabe University, Hazaribag (Bihar) India.

e) National Metallurgical Laboratory, Jamshedpur, India.

f) University of Newcastle upon Tyne, UK

g) Central Mining Research Institute, CMRI, Dhanbad

20. Other EDC Lectures

a) Delivered lecture on ‘’ Coal Geology ‘’ under 5-days training programme on “ Coal Preparation – Principles and Plant Practices” during 25-29 July 2011.

b) Delivered lecture on ‘’ Coal Geology ‘’ on 21.05.2012 under 5-Weeks training programme for Management trainees of E & M and Excavation Disciplines of Coal India Limited during 21st may- 30 June 2011.

c) ) Delivered lecture on ‘’ Coal Geology ‘’ under 5-days training programme on “ Coal Preparation – Principles and Plant Practices” during 26- 22nd June 2012

d) Delivered lecture on ‘’ Coal Geology ‘’ on 27.06.2012 under 5-Weeks training programme for Management trainees of E & M and Excavation Disciplines of Coal India Limited –Two sessions

e) Delivered lecture on ‘’ Coal Geology ‘’ on 30.0.2012 under 5-Weeks training programme for Management trainees of E & M and Excavation Disciplines of Coal India Limited –Two sessions

f) Delivered lecture on ‘’ Coal Geology ‘’ on 05.08.2013 under 5-Weeks training programme for Management trainees of E & M and Excavation Disciplines of Coal India Limited –Two sessions

g) Delivered lecture on ‘’ Coal Geology ‘’ on 10.08.2013 under 5-Weeks training programme for Management trainees of E & M Cadre of Coal India Limited –Two sessions

h)Delivered lecture on “Origin of Shale Gas and Shale Gas Reservoir Characterization” under Certificate Course on “ Advanced shale gas drilling and production techniques” on 1st June 2015 organized by Dr. V.Mahto, PE. ISM, Dhanbad.

i) Delivered lectures on ‘’ COAL FORMATION AND ITS GEOLOGY

‘’ (one session)on 22.02.2016 and “COAL PETROGRAPHY(two sessions) on 29.02.2016

Executive trainees of Coal India Limited organised by Fuel and Mineral Engg Dept, ISM, Dhanbad.

·       Fuel

·       International Journal of Coal Geology

·       Journal of Natural Gas Science and Engineering

·       International Journal of Coal Science and Technology

·       Marine and Petroleum Geology

·       Organic Geochemistry

·       Journal of Petroleum Science and Engineering

·       Journal of Geological Society of India

·       Current Science