青海省冷湖-鱼卡地区中侏罗统含煤地层特征分析  

Middle Jurassic Series Coal-bearing Strata Characteristic Analysis in Lenghu-Iqe Area,Qinghai Province

作　　者：岳天祥 

机构地区：[1]青海煤炭地质局,青海西宁810001

出　　处：《中国煤炭地质》2011年第12期18-20,29,共4页Coal Geology of China

摘　　要：柴达木盆地北缘冷湖-鱼卡地区侏罗系广泛分布,出露良好,在各露头剖面、钻井剖面资料的基础上,以沉积学理论为指导,系统研究了区内侏罗系含煤地层特征。结果表明:冷湖-赛什腾地区中侏罗统的沉积从盆地边缘开始向腹部扩展,并受基底断裂所形成的山前断陷控制;在西区的冷湖一带石门沟组发育,主要煤层形成于河漫沼泽相;东区的鱼卡一带大煤沟组发育,主要煤层沉积环境为三角洲间湾沼泽。The Jurassic System is widely spread in the Lenghu-Iqe area on the north margin of the Qaidam Basin.Based on outcrop sections,and borehole section data,and under the guidance of sedimentological theory,systematically studied Jurassic coal-bearing strata characteristics in the area.The result has demonstrated that： the middle Jurassic deposit in the Lenghu-Sesten area expanded from basin margin to hinterland,and controlled by piedmont fault depression originating from basement fault.The Shimengou Formation is well developed in the Lenghu district in the west,main coal seams were deposited in flood plain bog facies;while the Dameigou Formation is well developed in the Iqe district in the east,main coal sedimentary environment was deltaic interdistributary bogs.

关 键 词：冷湖-鱼卡 大煤沟组 石门沟组 沉积特征 

分 类 号：P534.52[天文地球—古生物学与地层学]