滇东地区晚二叠世煤田煤层对比

CORRELATION ON COAL SEAMS IN UPPER PERMIAN COAL FIELDS OF EASTERN YUNNAN REGION

滇东地区晚二叠世煤田是云南省主要焦煤产地。含煤岩系可分为恩洪型、老厂型和镇雄型。煤层对比经多年实践探索,以高岭石泥岩夹矸作为标志层最为有效,结合特殊岩性层、动物化石、煤层煤质等综合运用,至今,全区各煤田主要煤层的对比已获得众所公认的结果,主要煤层编号得到了统一。M_7煤层顶面可作为长兴阶(P_2 c)与龙潭阶(P_2 l)的界面,M_9煤层是滇东、黔西、川南区域上的主煤层,其分布之广、煤质之好、储量之大为各煤层之冠。

The Late Permian coal fields in Eastern Yunnan are the main coking coal occurrences in Yunnan province. The coal measures can be divided into the Enhong, Laochang and Zhenxiong types. According to the practice and probes in many years, it its the most effective to take the sloams of kaolinite mud-stone as the key beds, comprehensively apply the particular lithologic layers, faunas and coal quality, etc. marks in coal seam correlation. Up to now, the correlation work for major coal seams in various coal fields of the whole region has been achieved a well-known success and on agreement for number of the major coal seams has been reached. The roof of coal bed M_7 can be taken as the boundary of the, Changxing(PaC)with Longtan(P_2l)stages; coal bed M_9 is a regionally major one in Eastern Yunnan, Western Guichou and Southern Sichuan, it occupies the first place Iii distributed range, quality and resere.