中国地质调查2016，Vol.3Issue(4)：19-28,10.
雅鲁藏布江南带白垩纪地层划分及特征
Division and characteristics of the Cretaceous formation in southern Yarlung-Zangbo suture zone in Tibet
摘要
Abstract
A large number of Radiolarian fossils were found in the southern Yarlung-Zangbo suture zone of Xi-ukang Group,Lake Rakshastal-Saga county,eastern Danga region through the 1∶250 000 regional geological survey.And lithostratigraphic units for seven formation from Jurassic to Eocene are disintegrated through the de-tailed investigation and the characteristic of Radiolarian fossils.The Cretaceous formations are defined as Zheba Formation and Sangdanlin Formation.The characteristic of Zheba Formation is mainly composed of siliceous rocks,mudstone,shale and basaltic sandstone,and Zheba Formation is a conformity between upper Jurassic Dan-ga Formation and lower Cretaceous Sangdanlin Formation,and it is rich in Radiolarian fossils of lower Cretaceous. The characteristic of Sangdanlin Formation mainly consists of quartz sandstone,sandstone,mudstone,shale and siliceous rocks,intercalated with basalt.Sangdanlin Formation is a conformity between Zheba Formation of Early Cretaceous and Denggang Formation of Paleocene,and it is abundant in radiolarian and foraminifera fossils of Late Cretaceous.The establishment and research about the Zhaba and Sangdanlin Formations of Cretaceous can further enrich the basic information in southern Yarlung-Zangbo suture zone.It also improves our research level and provides new data for the sedimentary palaeogeographic and tectonic study in this area.关键词
雅鲁藏布江南带/白垩纪/地层划分Key words
southern Yarlung-Zangbo suture zone in Tibet/Cretaceous/stratigraphic division分类
天文与地球科学引用本文复制引用
张计东,范永贵,刘思林,马超,李先,廖云峰,刘洪章..雅鲁藏布江南带白垩纪地层划分及特征[J].中国地质调查,2016,3(4):19-28,10.基金项目
中国地质调查局基础地质调查“西藏1∶5万埃永错东地区4幅区域地质调查（编号1212011121245）”项目资助。 （）
