藏北色哇地区索布查组、曲色组岩石地层、层序地层、生物地层特征及三叠系与侏罗系界线LITHOSTRATIGRAPHY,SEQUENCE STRATIGRAPHY,AND BIOSTRATIGRAPHY OF THE SUOBUCHA AND QUSE FORMATIONS AND THE TRIASSIC-JURASSIC BOUNDARY IN THE SEWA AREA ON THE SOUTH MARGIN OF THE QIANGTANG BASIN,NORTHERN TIBET
王永胜,郑春子
摘要(Abstract):
对藏北羌塘盆地南缘色哇地区的三叠纪与侏罗纪地层进行研究,在下侏罗统曲色组之下发现了一套以灰岩为主的地层,建立了索布查组,该组下部产晚三叠世腕足类、双壳类、六射珊瑚,上部产早侏罗世菊石,因此确定索布查组地质时代为晚三叠世—早侏罗世。三叠系-侏罗系界线应在索布查组之内,三叠系与侏罗系可能为整合接触。
关键词(KeyWords): 岩石地层;层序地层;生物地层;索布查组;曲色组;上三叠统;下侏罗统;三叠系-侏罗系界线;藏北
基金项目(Foundation): 中国地质调查局区域地质调查(No200313000018)项目资助
作者(Author): 王永胜,郑春子
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