西藏申扎地区晚三叠世多布日组地层剖面的启示——对冈底斯印支运动的地层学制约  

An inspiration from the section of the Late Triassic Duoburi Formation in the Xainza area—Stratigraphic constraints on the Indosinian movement in Gangdise

作　　者：曲永贵[1] 王永胜[1] 张树岐[1] 吕鹏[1] 姜雪飞[1] 

机构地区：[1]吉林省地质调查院,吉林长春130061

出　　处：《地质通报》2003年第7期470-473,共4页Geological Bulletin of China

基　　金：中国地质调查局青藏高原1:25万多巴区幅区域地质调查项目成果之一。

摘　　要：冈底斯地区古生代台地之上上叠一个重要的沉积地层单元———上三叠统多布日组。其层序特征及底部不整合界面性质的研究,确认了该区在早中生代曾发生过强烈的褶皱运动,随后为一次重要的拉伸事件所更替,从而进一步证实了印支运动对冈底斯地区产生过深刻的影响。On the Paleozoic platform in the Gangdise area lies an important sedimentary unit—the Upper Triassic Duoburi Formation.Through a study of the characteristics of the sequence of strata and the nature of the unconformity at the base,the authors ascertain that strong folding took place in the early Mesozoic and was later replaced by an important extensional event.This confirms that the Indosinian exerted a pro-found effect on the Gangdise area.

关 键 词：冈底斯 多布日组 晚三叠世 角度不整合 印支运动 

分 类 号：P534.51[天文地球—古生物学与地层学] P542.2[天文地球—地质学]