Fig. 2

1:5000 Geological map of North Kochakali coal mine with location of samples, sampling area, faults, and boreholes (done by ArcGIS 10.4,1995–2016 Esri, http://www.esri.com).

1:5000 Geological map of North Kochakali coal mine with location of samples, sampling area, faults, and boreholes (done by ArcGIS 10.4,1995–2016 Esri, http://www.esri.com).