新疆柯柯亚地区上石炭统硅质岩成因及意义  

ORIGIN AND SIGNIFICANCE OF UPPER CARBONIFEROUS SERIES CHERTS IN THE KEKEYA OF XINJIANG

作　　者：张宏宝[1] 张洋[1] 李凤鸣[2,3] 王书芬[4] 李金和[1] 杨建坤[1] 

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]新疆地质矿产勘查开发局,新疆乌鲁木齐830000 [3]中国地质大学(北京),北京100083 [4]河北省保定地质工程勘查院,河北保定071051

出　　处：《新疆地质》2011年第4期377-380,共4页Xinjiang Geology

基　　金：新疆1∶5万区域地质矿产调查项目管理办公室(XJQDZ2006-04)项目资助

摘　　要：新疆柯柯亚地区上石炭统(柳树沟组、齐家沟组、奥尔吐组)硅质岩分布广泛.通过野外地质填图、剖面测制和常量、微量、稀土元素研究,结果表明,这些硅质岩是海底火山喷发多次活动结果.研究区硅质岩具高TiO2、富Ni、贫Co,低K2O、P2O5,Al2O3与TiO2呈正相关,在TiO2-Al2O3双变量图解中,属火山成因硅质岩,δCe与陆缘硅质岩非常接近,形成于大陆边缘环境.Cherts are wildly distributed in the Upper Carboniferous （Liushugouzu C21,Qijiagouzu C2q and Aoertuzu C2ae） in Kekeya area of Xinjiang.By detailed field observation in mapping,profile survey, combined with the date of macro-analysis,Ree and other trace elements.The results show that those cherts come from the many times volcanic eruption.The Characteristic of chert such as rich in TiO2 and Ni,But very poor in Co,K2O,P2O5,The AL2O3 varies directly with TiOE,discrimination diagram of biviriates TiO2-Al2O3,belong to the chert of volcanogenic, and the δCe approach with chert of terrigenous very much,deposited in the environment of continental margin.Therefore,it is significance of directing to study on Siliceous.

关 键 词：柯柯亚 上石炭统 硅质岩 火山成因 大陆边缘 

分 类 号：P578.94[天文地球—矿物学]