库车拗陷侏罗系物源-古水流体系特征及其研究意义  

Characteristics of Jurassic sedimentary provenance and palaeocurrent system in Kuqa Depression and its research significance

作　　者：范亚楠 王昌勇[1] 高志勇[2] 冯佳睿[2] 刘满仓[2] 林世国[2] FAN Yanan;WANG Changyong;GAO Zhiyong;FENG Jiarui;LIU Mancang;LIN Shiguo(State Key Laboratory of Oil&Gas Reservoir Geology and Exploitation,Chengdu University of Technology,Chengdu 610059,China;Petroleum Geology Research and Laboratory Center,PetroChina Research Institute of Petroleum Exploration and Development,Beijing 100083,China)

机构地区：[1]油气藏地质及开发工程国家重点实验室(成都理工大学),成都610059 [2]中国石油勘探开发研究院石油地质实验研究中心,北京100083

出　　处：《成都理工大学学报（自然科学版）》2021年第3期296-308,共13页Journal of Chengdu University of Technology: Science & Technology Edition

基　　金：中国石油天然气股份有限公司科学研究与技术开发项目(2019B-0505);国家科技重大专项(2016ZX05007-003)。

摘　　要：通过对重矿物特征、不同成因石英阴极发光特性及古流向分析,探讨侏罗纪南天山构造带差异隆升对库车拗陷“源-汇”系统的影响。库车拗陷侏罗系重矿物组合特征、石英阴极发光特征平面上表现出明显的东西方向分异性;古流向主要为近南北方向;物源主要来自南天山造山带岩浆岩及变质岩,少量来自沉积岩;侏罗纪南天山存在多期强烈构造挤压和隆升,南天山构造活动具有明显的分段性和继承性,且东段隆升时间早于西段。南天山东早西晚的构造隆升控制了物源及古水流体系的变化,东段构造活动更为频繁、强烈,并导致了较大的地形起伏,在东段及其所对应的拗陷区发育多个相对独立的古水系。The influence of the differential uplift of the southern Tianshan structural belt in Jurassic on the“source-sink”system in Kuqa depression is discussed through the analysis of the characteristics of heavy minerals,the cathodoluminescence characteristics of quartz with different genesis and the paleo-flow direction.Characteristics of Jurassic heavy mineral assemblage and quartz cathodoluminescence show obvious east-west differentiation in the plane of Kuqa Depression and the ancient flow direction is mainly near north-south.The depositional provenance is mainly from magmatic rocks and metamorphic rocks in the southern Tianshan orogenic belt,with minor source from sedimentary rock.There were multiple periods of strong tectonic compression and uplift in the southern Tianshan area during Jurassic period,and the tectonic activities show obvious segmentalization and inheritance,and the uplifting time of the eastern segment was earlier than that of the western segment.The tectonic uplift in the eastern part of the South Tianshan Mountains controlled the changes of provenance and palaeocurrent system in the early and late periods,and the tectonic activities in the eastern part were more frequent and intense,resulting in greater topographic relief,and several relatively independent palaeocurrent systems developed in the depression area of eastern segment.

关 键 词：重矿物 ZTR指数 阴极发光 构造演化 南天山 

分 类 号：P588.2[天文地球—岩石学]