Coal-controlled structural styles and coal occurrence regularity in northern Qaidam Basin

Using the analytical method for structure controlling coal,the coalfield structural styles were system studied in northern Qaidam Basin. Based on the analysis results,the coal-controlled structural styles were classified into six types,and their genetic and the relationship with coal occurrence regularity were discussed,and the occurrence regularity of coal measures was found out.The conclusions indicate that the tectonic deformation is intense in the front of the uplifted belts,the coal-controlled structural styles are characterized by the combination of reverse faults,the coal seams are uplifted to the shallow and easy to be exploited,but the scale of mines is small because of the serious damages of coal seams.On the contrary,the stress-strain is weak in the depressions,the coal-controlled structural styles are characterized by fault-fold and fault-monocline,and the occurrence of coal seams is stable,the shallow of the depressions should become the key areas of coalfield exploration and development.