青海聚乎更矿区侏罗纪含煤岩系沉积相研究  

A Study on Jurassic Coal-bearing Rock Series Sedimentary Facies in Juhugeng Mine Area,Qinghai

作　　者：杨德寿 王青平 童海奎 

机构地区：[1]青海煤炭地质勘查院,青海西宁810001

出　　处：《中国煤炭地质》2011年第12期15-17,共3页Coal Geology of China

摘　　要：木里煤田聚乎更矿区位于祁连拗褶带西段,区内含煤地层为中侏罗统木里组和江仓组。根据野外露头剖面、钻孔岩心的观察及测井曲线特征,对中侏罗统的沉积特征和沉积相平面展布特征进行研究。结果表明:中侏罗统木里组主要发育辫状河-辫状河三角洲沉积体系,江仓组主要发育辫状河三角洲-湖泊沉积体系,厚煤层多发育在辫状河三角洲沉积体系,且物源多来自研究区东北部托莱山和南部大通山地区。该结论有利于查明潜在的赋煤区,为下一步的煤炭地质勘探工作提供理论依据。The Juhugeng mine area,Muri coalfield is situated in the western sector of the Qilian depression and fold belt;coal-bearing strata in the area belong to the middle Jurassic Muri Formation and Jiangcang Formation.Based on field outcropped section,borehole core observation and logging trace characters,studied Middle Jurassic Series sedimentary features and facies planar distribution characteristics.The result has demonstrated that： in the middle Jurassic Muri Formation,mainly braided stream-braided stream delta sedimentary system has been developed;while in the Jiangcang Formation mainly braided stream delta-lacustrine sedimentary system.The thick coal seams were usually developed in the braided stream delta sedimentary system;the provenance was mainly from the Tulai Mountains to the northeast and the Datong Mountains to the south of the study area.The conclusion is propitious to find out potential coal hosting areas,thus the theoretical basis to further coal geological exploration works.

关 键 词：沉积相 沉积体系 含煤岩系 中侏罗统 聚乎更矿区 

分 类 号：P534.52[天文地球—古生物学与地层学]