新疆希勒库都克铜钼矿床地质特征和成因探讨  

GEOLOGICAL CHARACTERISTICS AND GENESIS OF THE XILEKUDUKE CU-MO DEPOSIT,XINJIANG

作　　者：王玉往[1] 王京彬[1] 王书来[1] 龙灵利[1] 王莉娟[1] 浦克信[1] 汪树栋[1] 唐萍芝[1] 

机构地区：[1]北京矿产地质研究院,北京100012

出　　处：《新疆地质》2010年第4期370-376,共7页Xinjiang Geology

基　　金：国家重点基础研究发展规划(2007CB411304和2001CB409806)项目资助

摘　　要：希勒库都克为近年来发现的一个以钼为主的铜钼矿床.在对矿床地质背景、矿区地质特征、矿体和矿石特征、矿化阶段和分带、围岩蚀变及矿床地球化学研究基础上,认为希勒库都克矿床以铜-钼组合、细脉浸染状矿化为特征,成矿与中酸性（次火山）斑岩脉有关,围岩蚀变具斑岩矿床的分带特征.成矿物质来自含矿斑岩,成矿流体来自岩浆水和天水混合.成矿温度和盐度较高,属斑岩铜钼矿床成因.辉钼矿Re-Os等时线年龄为（327.1±2.9）Ma.进一步研究表明,该矿床含矿斑岩锆石U-Pb年龄为（329.2±8.2）Ma,SiO2在70.37%～73.46%,K2O在3.65%～3.96%,铝饱和指数（A/CNK）为0.99~1.03,σ为1.48～1.87,属弱过铝质高钾钙碱性系列岩石.矿床产于后碰撞构造环境,在新疆北部这类斑岩铜钼矿床具良好的找矿潜力.The Xilekuduke is a new-exploration molybdenum-dominant Cu-Mo deposit proved up by recent work.Based on the study of the geological setting,geology of ore district,orebody and ore types,mineralization stage and zoning,wallrock alteration,as well as geochemistry on mineral deposit,it is considered that the Xilekuduke deposit may be attributed to a porphyry Cu-Mo deposit evidenced by such characteristics as copper-molybdenum assemblage,vein-let and disseminated mineralization,close relationship with felsic sub-volcanic porphyry dyke,porphyry-type wallrock alteration zoning,ore-forming material from porphyry,ore-forming fluid from magma or mixed-water by magma water and meteoric water,as well as high mineralization temperature and salinity.The Re-Os isochron age of molybdenite is 327.1±2.9Ma.The hosted porphyry with 329.2±8.2 Ma of zircon U-Pb dating,belongs to peraluminous K-high calc-alkaline rock series characterized by 70.37%~73.46% of SiO2,3.65%~3.96% of K2O,and 0.99~1.03 of A/CNK value.The deposit occurs the post-collisional tectonic setting,and this type of post-collisional porphyry Cu-Mo deposit provides with a well prospecting potential in North Xinjiang.

关 键 词：新疆北部 希勒库都克 斑岩铜钼矿 后碰撞 

分 类 号：P618.41[天文地球—矿床学] P618.65[天文地球—地质学]