Abstract
The present research work attempts to understand the organo-petrological facets of the lignite hosted in the Tertiary successions in Rajasthan. The maceral diversity was analyzed qualitatively and quantitatively which recorded huminite as the dominant microscopic constituent followed by inertinite and liptinite. The rank parameter of coal evaluated through vitrinite reflectance measurement random (VRo) shows the values vary between 0.19 to 0.27% suggesting lignite in rank. The petrographic investigation point towards the primary phase of degradation of organic matter corroborated through the dominance of huminite suggesting frequent flooding and the presence of funginite, demonstrating intense fungal activity in the mire. The paleodepositional model records elevated values of gelification Index (GI) ranging from 1.63 to 3.88 with well-preserved cell structures pointing towards an early phase of coalification. The model and plot of GI and TPI show that the paleomire developed in a limnic setting.
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Acknowledgement
The research has been funded by the Department of Science and Technology, DST-Purse program 5050. The authors extend thanks to the Head of the Department for extending all facilities in the department and specially using DST-PURSE and DST-FIST facility (Automatic polisher, Buehler and Elemental analyser, Eurovector and Photometer) in MP Singh Lab of Coal and Organic Petrology.
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A.S. Naik, serves as Professor in the Department of Geology, Banaras Hindu University Varanasi. Area of Specialization Coal Petrology and Geochemistry. Contribution Conceptualization and Supervision
Vishvajeet Singh, obtained his postgraduate degree, M.Sc. Tech (Geology), pursuing Ph.D. in the Department of Geology Banaras Hindu University, Varanasi. Contribution Conducting research, Data generation
D Mohanty, currently holds a position of Senior Principal Scientist & HoS, Non-Conventional Gases Research Group, CSIR-Central Institute of Mining and Fuel Research, Barawadih, Dhanbad. Contribution Review and supervision
R.K. Majhi is working at present as Assistant Professor in the Department of Geology, DD College, Keonjhar, Odisha. Contribution Data Curation
Govind Kumar holds postgraduate degree, M.Sc.Tech (Geology) and is a Ph.D. student in the Department of Geology Banaras Hindu University Varanasi. Contribution Conducting research and performing the experiments, or data/evidence collection
Neeraj Upadhyay has a postgraduate degree in Geology, M.Sc. Tech (Geology), and is pursuing a Ph.D. in the Department of Geology at Banaras Hindu University Varanasi. Contribution Conducting research and performing the experiments, i.e., data/evidence collection
Manju Kumari has received her postgraduate degree (M.Sc.) in Environmental Science and is a doctoral student in the Department of Geology Banaras Hindu University Varanasi. Contribution Data interpretation; Preparation of the manuscript.
Shweta Rai holds postgraduate degree in Geology, M.Sc. Tech (Geology), and presently pursuing Ph.D. in the Department of Geology at Banaras Hindu University Varanasi. Contribution Data interpretation; Preparation of the manuscript.
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Naik, A.S., Singh, V., Mohanty, D. et al. Organic Petrological Facets and the Evolution of Paleomire, Matasukh Lignite Deposits, Rajasthan, India. J Geol Soc India 99, 1372–1378 (2023). https://doi.org/10.1007/s12594-023-2484-9
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DOI: https://doi.org/10.1007/s12594-023-2484-9