库车坳陷东部下侏罗统阿合组重矿物特征及物源分析  

Heavy mineral characteristics and provenance analysis of Lower Jurassic Ahe formation in eastern Kuqa depression

作　　者：张恩泽 张立强[1] 严一鸣 徐振平[2] 周露[2] ZHANG Enze;ZHANG Liqiang;YAN Yiming;XU Zhenping;ZHOU Lu(School of Geosciences,China University of Petroleum,Qingdao,Shandong 266580,China;Research Institute of Exploration and Development,Tarim Oilfield Company,PetroChina,Korla,Xinjiang 841000,China)

机构地区：[1]中国石油大学(华东)地球科学与技术学院,山东青岛266580 [2]中国石油塔里木油田公司勘探开发研究院,新疆库尔勒841000

出　　处：《中国科技论文》2023年第9期1021-1027,1040,共8页China Sciencepaper

基　　金：中国石油天然气集团有限公司重大科技项目(ZD2019-183);中国科学院战略性先导科技专项(A类)(XDA14010202)。

摘　　要：为探明库车坳陷东部下侏罗统阿合组物源性质及具体物质来源,为研究区油气勘探开发提供理论依据,利用相关性分析、Q型聚类分析等多元统计方法,对阿合组重矿物的稳定性及组合特征进行了分析。研究表明,阿合组重矿物类型以稳定矿物为主,呈现远离物源区的特征,研究区母岩性质主要为中、酸性岩浆岩及变质岩,对应了北部南天山造山带虎拉山与哈尔克山2个潜在物源区的安山岩、流纹岩、花岗岩及变质岩基底。利用重矿物组合平面分布差异将研究区分为5个分区,其中虎拉山主要控制研究区东部的吐东区,物源方向为自东北向西南;哈尔克山主要控制明南区、吐孜区、迪北区及克孜区,物源方向为自北向南。In order to explore the provenance property and specific material source of the Ahe formation in the east of Kuqa depression as well as to provide theoretical basis for oil and gas exploration and development,the stability and combination characteristics of heavy minerals in clastic rocks of the Lower Jurassic Ahe formation in the east of Kuqa depression were analyzed using multiple statistical methods such as correlation analysis and Q-type cluster analysis.The results show that the heavy minerals of the Ahe formation are mainly stable ones,which means that the sediment is far away from the source area.The properties of source rock in the study area are mainly neutral,acidic magmatic and metamorphic rocks,which is in good accordance with the basement of andesite,rhyolite,granite and metamorphic rock in two potential provenance areas of Hula mountain and Halke mountain in the northern southern Tianshan orogenic belt.The studied area is divided into five zones based on the difference in the plane distribution of heavy mineral assemblages.Hula mountain mainly controls Tudong district in the east of the study area,with provenance direction from northeast to southwest.Halke mountain mainly controls Mingnan district,Tuzi district,Dibei district and Kezi district,with provenance direction from north to south.

关 键 词：重矿物 物源分析 多元统计方法 阿合组 库车坳陷 

分 类 号：P618.13[天文地球—矿床学]