Palaeodepth Studyfrom Parts Of Makum Coalfield In The Belt Of Schuppen, North Eastern India


Ranjan Kumar Sarmah


The study area , a part of the Makum Coalfield is located in the Upper Assam region of north – eastern India. The present study is confined only to the Tikak Parbat Formation of Barail Group and based on the analysis of petro graphic and chemical parameters of samples of coals.

Different methods have been employed to find out the palaeodepth of the base of Tikak Parbat Formation of Barail Group and loss of cover thereafter using existing sedimentary pile from palaeodepth data. It is found that out of Method I, IIA and IIB, data of Method I is close to that of Method IIB. A maximum palaeodepth reached in Tikak Hills area is 2500m, while around Ledo-Tirap Colliery area, it is 2439m which is close to the actual stratigraphic thickness of total sediments had there been no erosion. A loss of cover due to erosion is variable in space and it is approximately 2100m to 2400m in Tirap and Tikak Hill sections respectively.