宝清煤田七星河区沉积环境演化与聚煤规律  

The Law of Depositional Environment Evalution & Coal Accumulation in Qixinghe Area of Baoqing Coalfield

作　　者：蔡玉兰[1] 邹艳荣[1] 王连元[1] 张长生 

机构地区：[1]黑龙江矿业学院矿产资源开发工程系

出　　处：《黑龙江矿业学院学报》1996年第1期20-24,共5页

基　　金：煤炭部优秀青年科研基金项目部分成果

摘　　要：七星河区位于宝清煤田南缘,区内存在5种等时界面,将含煤岩系分为6个成因单元10个亚单元。沉积环境演化经历了初始充填期、湖泊扩张期、湖泊收缩期、湖泊淤浅期和结束充填期5个阶段。区内主要的聚煤作用发生在湖泊淤浅期,聚煤有利部位位于废弃的扇三角洲体之上。Qixinghe area lies in the southern margin of Baoqing Coalfield. There are five types of chronostratigraphic boundaries in the area. By the boundaries, the coal-bearing sequence is divided into six genetic strantigraphic units and further into ten subunits. The evalution of deposi-tional environment goes through five stages, i. e. beginning- filling, lacustrine expanding, lacustrine contracting, lacustrine shallowing and end-rilling period. The main coal accumulation took place in the lacustrine shalowing period and the best place of coal accumulation is on the abandoned fan-delta bodies.

关 键 词：煤田 成因 地层 沉积环境 聚煤规律 

分 类 号：P618.110.2[天文地球—矿床学]