新疆岔路口一带基性-超基性岩地质特征及找矿意义  

Geological Characteristics of Basic-Ultrabasic Rocks and Its Prospecting Significance in Chalukou,Xinjiang

作　　者：赵芳 屈李华 卢慧林[1] 夏辉 蒋忠祥[1] 侯明利 伊永国[1] 云鹏 李司俊阳 周权 ZZhao Fang;Qu Lihua;Lu Huilin;Xia Hui;Jiang Zhongxiang;Hou Mingli;Yi Yongguo;Yun Peng;Li Sijunyang;Zhou Quan(Geophysical and Geochemical prospecting group of Xinjiang bureau of geology and mineral resources Exploration and Development,Changji,Xinjiang,831100,China)

机构地区：[1]新疆维吾尔自治区地质矿产勘查开发局地球物理化学探矿大队,新疆昌吉831100

出　　处：《新疆地质》2022年第2期204-210,共7页Xinjiang Geology

基　　金：新疆地质矿产勘查开发局项目新疆和田县卡孜勒一带铅锌矿选区研究(XGMB201924)资助。

摘　　要：以新发现的基性-超基性岩体为研究对象,结合区域地质、化探背景,在岩相学观察基础上,对区内岩体地质特征、岩石矿物组合、热液蚀变特征、物理化学特征进行系统分析,总结该岩体的找矿意义,划分铜镍找矿预测区。结果表明:岩体以辉石岩为主,次为纯橄榄岩、橄辉岩、角闪岩及少量玄武岩、安山岩,具有岩浆铜镍硫化物矿床磁黄铁矿-镍黄铁矿-黄铜矿的典型矿物组合特征;热液蚀变见蛇纹石化、阳起石化、绿帘石化等,蚀变导致岩体镁铁比值偏小;岩体具有较好的铜镍异常且异常面积大,具多级浓度分带特征。地球物理特征表明,岩体具岩浆型铜镍矿产的一般规律,反映该岩体具有寻找铜镍矿的潜力。The study of basic-ultrabasic rock masses in the Chalukou,West Kunlun,has significant implications for the exploration of copper-nickel sulfide deposits in this district.Taking the newly discovered basic ultrabasic rock mass as the research object,combined with the regional geological and geochemical background,on the basis of petrographic ob-servation,this paper systematically analyzes the geological characteristics,rock mineral assemblage,hydrothermal altera-tion characteristics and physicochemical characteristics of the rock mass in the area,summarizes the prospecting signifi-cance of the rock mass,and divides the regional copper nickel prospecting prediction area.The results show that the rock mass is mainly pyroxenite,followed by pure peridotite,olivine pyroxenite,amphibolite and a small amount of basalt and andesite;It has typical mineral assemblage characteristics of pyrrhotite nickel pyrite chalcopyrite in magmatic copper nickel sulfide deposit;Serpentinization,Yangqi fossilization and epidotization can be seen in hydrothermal alteration,which leads to the small magnesium iron ratio of the rock mass;The rock mass has good copper nickel anomaly with large anomaly area and multi-level concentration zoning characteristics.The geophysical characteristics show that the rock mass has the general law of magmatic copper nickel ore,which reflects that the rock mass has the potential to look for copper nickel ore.

关 键 词：西昆仑 超基性岩 岩石矿物组合 物理化学特征 找矿意义 

分 类 号：P588.125[天文地球—岩石学]