DOI: 10.5176/2251-3353_GEOS13.48
Authors: L.Mahesh Bilwa, Nagamadhu C.J., Prameela M. and Dipin Malvila
Abstract: Present investigation of Organic Matter (OM) distribution pattern from deep water bore hole samples from Adichapuram bore hole no– 4 of Nagapattinam Sub-basin, Cauvery Basin, Tamil Nadu. This study have revealed organic matter, bio degraded material, woody organic matter, amorphous organic matter and very less quantity of spores and pollens between 3834 metres to 3420 meters. The present investigation concern to the total depth 414 m thicknesses. The colour variation also studied from all the 59 samples has revealed a cyclic change of colours from dark grey to light grey. This colour change is due to Palaeodepositional climatic variation have controlled the colour of the sediments. An attempt has been made to unravel the distribution and relationships with other organic matter of the sediments are discussed. Comprehensive account have been brought out on sediments under investigation from subsurface of the basin are studied depth wise. The possible relationship of organic matter and its percentage were calculated according to stratigraphic position from the bottom to the top of the bore hole samples. Organic and palynological facies types were separated and studied in detail to make possible percentage and classify group like humic – woody, fusinite – charcoal and biodegraded material types.
Keywords: Deep water sub surface sediments, organic matter, woody organic matter, amorphous organic matter, Palynomorphs, estimate percentage organic matter, distribution pattern, source rock evaluation, variation colour sediments depositional environment
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