柴北缘含煤区构造演化与构造控煤作用  

Tectonic Evolution and Structural Control of Coal in Northern Margin of Qaidam Basin Coal-bearing Zone

作　　者：占文锋[1] 林亮[2] 孙红波[2] 孙军飞[2] 

机构地区：[1]北京工业职业技术学院,北京100042 [2]中国矿业大学(北京),北京100083

出　　处：《中国煤炭地质》2008年第10期25-27,33,共4页Coal Geology of China

基　　金：中国煤炭地质总局科技发展资金(2008-Ⅰ-02);青海省煤炭资源潜力评价课题

摘　　要：采用共轭剪节理古应力场反演、沉降史反演和平衡剖面分析方法,将柴北缘含煤区构造演化划分为5个阶段:前中生代、基底形成阶段;早、中侏罗世伸展沉降阶段;晚侏罗世—白垩世构造反转、挤压抬升剥蚀阶段;古新世—渐新世强烈挤压阶段;中新世以来盆地定型阶段。印支期后多次大规模的构造运动,使得煤系展布呈现出南北分带、东西分区的基本规律。三条隆起带南麓,含煤地层抬升变浅,多遭受剥蚀;三条凹陷带内煤系广泛分布,浅部形成较大面积的有利勘查开发区块,为柴北缘预测找煤的重点区域。By the use of conjugate shear joints paleostress field inversion, subsidence history inversion and balanced cross section analysis, five tectonic evolution stages in the northern margin of the Qaidam Basin coal-bearing zone were reconstructed： （1）formation of basement before the Mesozoic. （2）extension and subsidence during the early and middle Jurassic. （3）tectonic reversion and compressed uplifting, denudation during late Jurassic and Cretaceous. （4）intensive compression from Paleocene to Oligoeene. （5） finalization of basin after the Miocene. Several periods of regional tectonic activities since the Indosinian stage lead the basic pattern of coal measures showing SN zonation and EW division. The coal measures were raised to shallow, but three uplift belts in the south had denuded away. Whereas the coal measures distributed widely in three depressions, areas in favor of exploration and exploitation are preferred targets of coal prediction in northern margin of Qaidam Basin.

关 键 词：柴北缘含煤区 构造演化 构造控煤 

分 类 号：P618.110.2[天文地球—矿床学]