福建天湖山煤矿区童子岩组一段沉积环境与聚煤规律

Depositional Environment and Coal Accumulating Pattern of No.1 Member Tongziyan Formation in Tianhushan Coalmine Area Fujian

通过对童子岩组一段沉积特征分析,并结合天湖山矿区在闽西南凹陷区的空间位置,分析了天湖山矿区童子岩组一段的沉积环境和聚煤规律,划分了童子岩组一段的三个成煤期,这三个成煤期的聚煤作用随着海水进退而改变,煤层的好坏并不随着底板砂岩的厚薄而改变。

Analyzed depositional features of the No.1 member of Tongziyan Formation and spatial position of Tianhushan coalmine area in southwestern Fujian depression, so that the depositional environment and coal accumulating pattern were found out. The author pointed out there are three coal-forming stages can be divided in No.J member of Tongziyan Formation,coal accumulation changed along with marine transgression and regression, while coal seam ebb and flow with no relation to thickness of floor sandstones.