Missing Coal Seam between East and West Bokaro near Lugu Hill of Damodar Basin, India: A Geological Model
- PDF / 2,933,418 Bytes
- 10 Pages / 595 x 842 pts (A4) Page_size
- 56 Downloads / 173 Views
Missing Coal Seam between East and West Bokaro near Lugu Hill of Damodar Basin, India: A Geological Model Sugata Kumar Sinha and Saurabh Datta Gupta* Indian Institute of Technology (Indian School of Mines) Dhanbad E-mail: [email protected]; [email protected]*
ABSTRACT The coal formation of the Damodar basin is found in parts of the Indian states of West Bengal and Jharkhand. However, the potentiality of the coal formation and its presence across the basin are not equal. Both East Bokaro and West Bokaro are highly fertile and productive for high-quality coal. However, due to the lack of coal seams, no significant discoveries can be made between these two regions. The purpose of the present study is to identify the reasons for the lack of coal seam between the areas of the eastern and western Bokaro of the Damodar basin. The study area was chosen near the Lugu hill, adjacent to the Ghato area in the West Bokaro based on the geological significance. The presence of the coal seam is not identified in the study area. To reach the objective of the study an integrated geological model was developed based on laboratory analysis, computational and analytical approach. Newly acquired shallow seismic data, earlier acquired digitized gravity data and drilled well data were used for the study. Rock samples were collected from discrete areas of the Lugu hill for laboratory analysis. The integrated geological depositional model suggests that crustal thinning and basement upliftment is the significant reason for the absence of coal seam in between East and West Bokaro. Several tectonic activities and associated intrusion are another factor for the absence of coal in the area. INTRODUCTION The coal exploration in Damodar river valley basin started long back. Dhanbad, the coal capital of India, is situated in this area. A large variety of minerals resources are found in this region which has contributed to the economic development of the country (Bhattacharya et.al., 2002; Narain, 1994; Chakraborty and Ghosh, 2005). East and West Bokaro coalfields are two areas for coal production. However, few areas between East and West Bokaro are not suitable for coal production due to absence of coal seam. Earlier a few regional level of studies were conducted in the Damodar basin for basin evaluation. This study is focussed on the development of Talchir Formation, sea level changes followed by glaciogenic sedimentation and structural changes after the post-glacial period along with rebound of strata indicates fault block upliftment scenario after the fracturing and differentiation of crust (Ghosh and Mitra, 1967). This theory is widely accepted for regional level; however, this model does not account for subtle level variation of coal deposition in Gondwana Formation. In 1991, Giese and Jacobshagen showed tectonic inversion of intercontinental ranges (Giese and Jacobshagen, 1991). The analysis was helpful for our study towards configuration of basement deposition and post basement deposition of the Gondwana Formation to the Pan
Data Loading...
