西藏吉隆沟石炭纪沉积相与层序地层特征  

The Carboniferous sedimentary facies and sequence stratigraphy in the Gyironggou in Gyirong, Xizang

作　　者：魏文通[1] 张振利[1] 孙肖[1] 刘洪章[1] 李金和[1] 田立富[2] 

机构地区：[1]河北省区域地质矿产调查研究所,河北廊坊065000 [2]石家庄经济学院,河北石家庄050031

出　　处：《沉积与特提斯地质》2004年第1期21-26,共6页Sedimentary Geology and Tethyan Geology

基　　金：中国地质调查局 1:2 5万<萨嘎县幅>;<桑桑区幅>;<吉隆县幅>区域地质调查 (2 0 0 0 1 30 0 0 0 91 81 )

摘　　要：西藏北喜马拉雅地层分区石炭纪仅发育杜内期—维宪期沉积 ,时间跨度约 30Ma ,含亚里组与纳兴组两个岩石地层单位。据吉隆沟地层的特征可识别出潮坪、三角洲及浅海陆棚等沉积相。由层序界面性质与地层结构特征划分为 2个Ⅰ型层序、7个Ⅱ型层序、2个层序组 ,属 1个超层序。多数层序仅由海侵体系域 (TST)和高水位体系域(HST)The Toumaisian and Visean deposits with a timespan of about 30 Ma developed in the Carboniferous strata in the Northern Himalaya stratigraphic subprovince in Xizang consist of two lithostratigraphic units: Yali and Naxing Formations, in which the tidal-flat, delta and shallow-marine shelf facies may be recognized. These stratigraphic sequences are involved in one supersequence, and consist of two I type sequences, seven II type (sequences) and two sequence sets, most of which are composed of the transgressive systems tract (TST) and highstand systems tract (HST).

关 键 词：吉隆沟 石炭纪 层序地层 沉积相 西藏 

分 类 号：P512.2[天文地球—地质学]