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Thakur, O. P.
- Petrographic Characterization of Khadsaliya Lignites, Bhavnagar District, Gujarat
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1 Birbal Sahni Institute of Palaeobotany, 53 University Road, Lucknow - 226 007, IN
1 Birbal Sahni Institute of Palaeobotany, 53 University Road, Lucknow - 226 007, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 76, No 1 (2010), Pagination: 40-46Abstract
The petrological studies on Khadsaliya lignites from Bhavnagar district have been carried out for their microconstituent's characterization. Quantitative estimation of macerals reveal, due to high amount of macerals of huminite group, that this lignite deposits has formed from forest dominated vegetation in a fast subsiding basin, experiencing almost uniform environmental conditions, with slight intermittent fluctuations. The rank based on Ro max % values indicates that lignites are less mature and have not reached the sub-bituminous stage of coalification as those of the lignites from Panandhro (Gujarat) and Neyveli (Tamil Nadu) fields. High pyrite content in the Khadsaliya lignite makes it not much suitable for combustion purpose.Keywords
Maceral, Maturation, Palaeodeposition, Khadsaliya Lignite, Cenozoic, Gujarat.- Petrographic and Depositional Characteristics of Tadkeshwar Lignite Deposits (Cambay Basin), Gujarat
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Authors
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1 Organic Petrology Group, Birbal Sahni Institute of Palaeobotany, 53 University Road, Lucknow - 226 007, IN
2 Department of Geology, Kurukshetra University, Kurukshetra - 136 119, IN
1 Organic Petrology Group, Birbal Sahni Institute of Palaeobotany, 53 University Road, Lucknow - 226 007, IN
2 Department of Geology, Kurukshetra University, Kurukshetra - 136 119, IN
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 80, No 3 (2012), Pagination: 329-340Abstract
Tadkeshwar lignite deposits are one of the important Lower Tertiary lignite deposits of Cambay Basin, Gujarat. These lignites are rich in huminite macerals followed by liptinite and inertinite with moderate to high proportions of associated mineral matter. Under fluorescence mode these are found to be rich in liptinite macerals, in particular the liptodetrinite and resinite. The type of huminite suggests that the lignite is formed from mixed vegetal source, i.e. woody forest vegetation and herbs, shrubs. The composition of macerals indicates the deposition of lignite in sub-aqueous condition in wet-reducing environment with intermittent exposure and subsidence of the peat surface. The rank of the Main and the Leader seams, determined through reflectance measurement, indicate that the lignite is less mature. The considerable amount of perhydrous huminite may have contributed to the lower reflectance values in some of the samples. Low rank and appreciable amount of mineral matter make the lignite suitable for its utilization in thermal power plants, however when upgraded or mixed with better quality coals it can be used for other industries.Keywords
Maceral, Rank, Petrology, Tadkeshwar Lignite, Cenozoic, Cambay Basin, Gujarat.References
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