利用多重地层划分理论对皖南龙潭煤系地层的初步厘定  

PRELIMINARY DETERMINATION OF THE LONGTAN COAL MEASURES STRATA IN SOUTH ANHUI USING MULTIPLE STRATIGRAPHIC DIVISION THEORY

作　　者：姜松[1] 

机构地区：[1]安徽省煤田地质局勘查研究院,安徽合肥230088

出　　处：《安徽地质》2010年第2期90-94,共5页Geology of Anhui

摘　　要：安徽省南部晚二叠世早期含煤地层,主要分布在扬子地层区的下扬子地层分区和江南地层分区之中。根据岩性、岩相古地理分布及生物面貌等不同特征,在下扬子地层分区中可进一步划分为巢湖—安庆地层小区和宿松—繁昌地层小区;江南地层分区中划分为广德~休宁地层小区。以往煤田地质系统将上述三个地层小区中的晚二叠世早期含煤岩石地层均称为龙潭组,而我省地矿系统则把龙潭组下部的砂页岩段划出,称为堰桥组或银屏组。本文根据多重地层划分原则,把巢湖~安庆地层小区和广德—休宁地层小区中一套含煤碎屑岩石地层含（银屏组/堰桥组）统称为龙潭组;宿松—繁昌地层小区则称为吴家坪组。The early coal-bearing strata of the late Permian mainly occur in the lower Yangtze stratigraphic division and Jiangnan stratigraphic division of the Yangtze Stratigraphy in southern Anhui Province.Based on lithology,lithofacies paleogeographic distribution and biological appearances,the lower Yangtze stratigraphic division can be further divided into the Chaohu-Anqing and Sosong-Fanchang subs,and the Jiangnan stratigraphic division into Guangde-Xiuning sub.In the past,the early coal-bearing strata of the late Permian in abovementioned three subs were all called the Longtan Formation in the coal geology circle,while the sandy shale member of the lower Longtan Formation was removed from the formation and called Yanqiao Formation or Yinping Formation in the geological and mineral exploration circle in our province.This paper,based on multiple stratigraphic division rule,tends to put the set of coal-bearing clastic rock strata（including Yinping/Yanqiao Formation） from the Chaohu-Anqing and Guangde-Xiuning subs together and name it Longtan Formation,leaving the Susong-Fanchang sub to be called Wujiaping Formation.

关 键 词：多重地层划分 岩石地层 年代地层 生物地层 龙潭组 吴家坪阶 

分 类 号：P535[天文地球—古生物学与地层学]