Sedimentary and evolutionary characteristics of Sinian in the Tarim Basin  

作　　者：Kaibo Shi Bo Liu Weimin Jiang Xiaoqiao Gao Shiqi Liu Yingchu Shen 

机构地区：[1]School of Earth and Space Science,Peking University,Beijing 100871,China [2]Institute of Oil and Gas,Peking University,Beijing 100871,China [3]School of Earth Sciences and Resources,China University of Geosciences,Beijing 100083,China

出　　处：《Petroleum Research》2017年第3期264-280,共17页石油研究（英文）

基　　金：The workwas supported by China Geological Survey Project(No.DD20160175-1-1);the National Natural Science Foundation of China(No.41272137,No.41572117).

摘　　要：Analysis of Sinian outcrops in the peripheral regions of the Tarim Basin,drilling and seismic data within the Tarim Basin,and combined with previous studies,distribution of Sinian strata,tectonic setting,sedimentary system and lithofacies palaeogeography were well discussed.Results showed that three sedimentary systems were developed in the Sinian System of the Tarim Basin,i.e.the clastic sedimentary system,the clastic-carbonate mixed sedimentary system,and the carbonate sedimentary system,vertical sedimentary characteristics evolved from the clastic sedimentary system to the carbonate sedimentary system.These three sedimentary systems were corresponded to three transgression-regression cycles in the Sinian.The marine transgression during the initial period of the Early Sinian(ZSQI)resulted in development of the clastic sedimentary system in the lower part of the Lower Sinian;the transgression during the late period of the Early Sinian(ZSQII)led to formation of the clastic-carbonate mixed sedimentary system in the upper part of the Lower Sinian;the transgression during the initial period of the Late Sinian(ZSQIII)resulted in development of carbonate sedimentary system in the Upper Sinian.Three regressions resulted in formation of three unconformities,which were on the middle part of the Lower Sinian,the top of the Lower Sinian and the top of the Upper Sinian respectively.Due to breakup of Rodinia supercontinent in the Neoproterozoic,the Tarim Basin was in the continental rifting evolutionary process.In the Sinian,the basin experienced evolutionary processes of intra-cratonic depression and passive continental margin,thus characteristic of the lithofacies palaeogeography was characterized by uplifts in the south and depressions in the north.In the Early Sinian,the Tarim Basin developed the Bachu-Tazhong-Tadongnan uplift and the Tabei residual ancient land,and the shore-shelf sedimentary environment in the north as well as the shore-shelf-bathyal sedimentary environment in the southwest.In the Late Sinian,the Tabei

关 键 词：SINIAN Sequence Clastic sedimentary system Clastic-carbonate mixed sedimentary SYSTEM Carbonate sedimentary system Lithofacies palaeogeography Tarim Basin 

分 类 号：P53[天文地球—古生物学与地层学]