Palynodating of subsurface sediments,Raniganj Coalfield,Damodar Basin,West Bengal |
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Authors: | Srikanta Murthy B Chakraborti M D Roy |
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Institution: | (1) Central Institute of Mining and Fuel Research, Barwa Rd, Dhanbad, 826 015, India |
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Abstract: | The Gondwana sediments comprising fine-grained shales, carbonaceous shales, sandstones and the coal horizon in borecore RT-4
(approximately 547.00m thick) from Tamra block, Raniganj Coalfield, Damodar Basin, are analyzed palynologically. Based on
the distribution pattern of marker palynotaxa, two assemblage zones are identified. In the Barren Measures Formation, dominance
of enveloping monosaccate (Densipollenites) along with striate bisaccate (Striatopodocarpites, Faunipollenites) pollen taxa, and the FAD’s of Kamthisaccites and Arcuatipollenites observed at 30.75, have equated this strata (30.75–227.80 m thick) with the Raniganj Formation of Late Permian in age. Downwards
in the Barakar Formation, between 423.80–577.70 m depths, an abundance of non-striate (Scheuringipollenites) and striate (Faunipollenites and Striatopodocarpites) bisaccate pollen taxa is observed, that dates late Early Permian in age. |
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