大兴安岭中段木瑞组的发现及其地质意义  

Discovery and geological significance of Murui Formation in middle segment of Greater Khingan Range

作　　者：李望东[1] 聂立军[1] 王聪[1] 周晓东[1] 

机构地区：[1]吉林省区域地质矿产调查所,吉林长春130012

出　　处：《吉林地质》2013年第4期11-12,共2页Jilin Geology

摘　　要：在内蒙古1:5万蘑菇山幅、柴河源幅、苏河屯幅、兴安幅四幅区域地质调查中,研究人员通过详细的野外地质调查,首次在中侏罗统满克头鄂博组下部发现木瑞组,二者为整合接触关系。该组岩石类型为紫红色泥质粉砂岩夹灰白色砾岩,出露不完整,从而证明大兴安岭中段在中侏罗世历经陆相山间盆地堆积,具快速堆积特点。该组可作为一个区域性的标志层,对研究大兴安岭中段在中侏罗世期间地质演化史具有重要意义。In regional geological survey of 1：50000 mushroom mountain sheet,Chaiheyuan sheet,Suhetun sheet,Xing＇an sheet four sheets in Inner Mongolia,through detailed field geological survey,first time discovered Murei Fm in the lower of Middle Jurassic manketouebo Fm,the two are conformable contact.The rock type is aubergine pelitic siltstone mix offwhite conglomerate,exposed incomplete.That proved the middle part of Greater Khingan Range experienced accumulation of continental intermountain basin in the Middle Jurassic,with rapid accumulation feature.The group is a regional marker beds,has great significance to study the geological evolution history of Greater Khingan Range middle part in the Middle Jurassic.

关 键 词：区域地质调查 大兴安岭中段 木瑞组 山间盆地堆积 标志层 

分 类 号：P534.52[天文地球—古生物学与地层学]