陇东煤田中侏罗世延安Ⅰ期聚煤规律研究  

Study on Coal Accumulation Law of Yan'an I Period in Middle Jurassic of Longdong Coalfield

作　　者：曹大文 CAO Dawen(th Team,Gansu Coalfield Geology Bureau,Lanzhou 730000,China)

机构地区：[1]甘肃煤田地质局一四九队,兰州730000

出　　处：《煤炭技术》2024年第10期112-117,共6页Coal Technology

摘　　要：基于系统分析的方法进行聚煤规律研究。从煤系基底构造特征、层序地层分析基础上将煤田延安期分为5个成煤期。从主要延安Ⅰ期(主要成煤期)古气候、古地理、沉积环境入手,较全面地总结了该期煤田内聚煤规律:分析物源区位于西部,河流走向由西向东,主要可采煤5层为分流河道间泛滥平原沼泽相沉积,并反映了主要可采煤层东薄西厚,煤层数东少西多,向湖泊方向尖灭的规律特征。对预测区内煤炭资源,开展煤炭地质工作有很好的指导作用。Based on the method of systematic analysis of coal accumulation law,the Yan'an period of coal field is divided into five coal-forming periods based on the structural characteristics of coal measure basement and sequence stratigraphy analysis.Starting from the paleoclimate,paleogeography and sedimentary environment of the main Yan'an I period(main coal-forming period),the law of coal accumulation in the coal field of this period is summarized comprehensively:The source area of the analysis is located in the west,the river runs from west to east,and the main recoverable coal,layers are swamp facies deposits in the flood plain between distributary channels,which reflects the law characteristics of the main recoverable coal seams thin in the east and thick in the west,fewer coal seams in the east and more coal seams in the west,and sharp out in the direction of the lake.Provides an excellent guide for predicting coal resources in the region and developing coal geology work.

关 键 词：陇东煤田 延安组 古地理 沉积环境 聚煤规律 

分 类 号：P534.52[天文地球—古生物学与地层学] P536[天文地球—地质学]