Classification and combination relationship of mineral resources in coal measures

The coexisting phenomenon of various mineral resources in coal measures has attracted a lot of attention in recent years. The study on mineral resources type classification and their combination relationship is the foundation of comprehensive exploration and evaluation of minerals in coal measures. Through the systematic collection of previous research results,field research,and symposium discussions,the concept of mineral resources in coal measures was de- termined again as the whole mineral resources which distributes in coal and coal measures and nearby strata,and these minerals had genetic or spatial relationship with coal. The types of mineral resources were divided from several aspects such as economic value,occurrence condition, genetic mechanism, phase behavior and industrial classification. The classification system of minerals combination was preliminarily established according to the current occurrence of min- eral resources in coal measures. This classification system consists of six categories including coal-energy mineral,coal-metallic mineral,coal-nonmetallic mineral,coal-energy mineral-metallic mineral,coal-energy mineral-nonmetallic min- eral and coal-nonmetallic mineral-metallic mineral. Based on the temporal and spatial differentiation of China ’ s coalfield geology and coal minerals distribution,the minerals combination types in coal measures of five coal occur- rence areas were briefly summarized.