摘要
通过野外地质考察、岩心观察和样品测试分析对塔西南坳陷叶城—和田地区二叠系的地层和沉积特征进行研究,确定该区二叠系的的地层划分对比方案。二叠纪早期继承了石炭纪的广泛海侵,为碳酸盐岩台地发育的鼎盛时期,中期海水自东向西退去,发育海陆交互相沉积,晚期地壳抬升,西高东低,海水退去,仅在和田地区山前地带发育陆相沉积。二叠系依次发育3种沉积相模式,分别为碳酸盐岩沉积相模式、混积陆棚沉积相模式和碎屑岩沉积相模式。
On the basis of the seniors＇ study,we research on the strata and sedimentary characteristics of Permian in Yecheng-Hetian area of southwest Tarim basin by using field geologic investigation,core observation and sample test.We have Clarified the project of stratigraphy division and correlation of Permian in this area.The early Permian,it inherited the extensive transgression of carboniferous period,was the peak period the development of carbonate platform.In the middle Permian,marine regressed from east to west,and it developed interbedded marine-continental facies deposits.In the later Permian,crust uplift,the land descended from west to east,and marine regressed entirely,only developed continental deposits in submountain region of Hetian area.There are three sedimentary facies modes,including carbonate deposits sedimentary facies mode,mixed continental shelf deposit sedimentary facies mode and clastic rocks deposit sedimentary facies mode.
出处
《重庆科技学院学报（自然科学版）》
CAS
2013年第2期39-44,共6页
Journal of Chongqing University of Science and Technology：Natural Sciences Edition
基金
全国油气资源战略选区调查与评价国家专项(第二批)(2009GYXQ02)
关键词
塔西南
叶城—和田地区
二叠系
沉积特征
Southwest Tarim basin
Yecheng-Hetian area
Permian
sedimentary characteristics
