甘肃省武威市东南部找煤前景分析  

Analysis on Coal Prospecting Prospects in Southeastern Wuwei of Gansu Province

作　　者：王红霞 WANG Hongxia(Gansu Coalfield Geological Bureau,Lanzhou,Gansu 730000)

机构地区：[1]甘肃煤田地质局,甘肃兰州730000

出　　处：《中国煤炭地质》2024年第3期1-5,共5页Coal Geology of China

摘　　要：河西走廊北祁连一带发育众多侏罗系小型聚煤盆地。前人研究了武威盆地石炭系发育自生自储式生储盖组合,但对侏罗系勘探研究程度较低。通过对武威市东南部一带侏罗纪古地理和后期构造特征的分析研究,认为研究区中侏罗世地层整体为湖沼泽相含煤碎屑岩建造,处于温暖潮湿的河流、沼泽及浅水湖泊相还原环境,具备中生代煤系沉积并保存下来的有利条件。根据研究区所处的构造单元及构造体系对成煤作用控制的特征,研究区所属构造单元的次一级隆起部位是今后开展找煤工作较为有利的地段。Numerous Jurassic small coal gathering basins have been developed along the north Qilian of the Hexi Corridor.The Carboniferous System of the Wuwei Basin has developed a self-generating and self-storage type of production and storage cover combination,but the degree of exploration and research on the Jurassic System is relatively low.By analysing the Jurassic paleogeography and later tectonic features along the southeastern part of Wuwei City,it is concluded that the Middle Jurassic strata of the study area as a whole was constructed as a lake-marsh-phase coal-bearing detritus,and was in a warm and humid environment of rivers,marshes,and shallow lakes in a phase-reduced environment,which possessed the favourable conditions for the deposition of Mesozoic coal deposits and preservation of the coal system.The characteristics of the structural units and systems control the coal-forming process in the study area,the secondary uplifts are favorable locations for the future coal exploration.

关 键 词：边缘拗陷 过渡型褶曲 次一级隆起 河西走廊侏罗系盆地 

分 类 号：P618.11[天文地球—矿床学]