北祁连石居里地区Cu(Zn)-S矿床地质特征及综合成矿模式  

Geological Characteristics and Comprehensive Metallogenic Model of Copper and/or Zinc Sulfide Deposits in Shijuli Area, North Qilian Mountains

作　　者：邬介人[1] 于浦生[1] 任秉琛[1] 

机构地区：[1]中国地质调查局西安地质矿产研究所,陕西西安710054

出　　处：《矿床地质》2001年第4期339-346,共8页Mineral Deposits

基　　金：中国地质调查局地质调查项目 (编号 :K4.2 .3.4)"甘肃省石居里一带铜矿评价"的资助

摘　　要：文章主要论述了北祁连山西段石居里矿田内Ⅵ号沟、Ⅷ号沟、九个泉等矿床的基本地质特征 ,并与北祁连山东段老虎山地区银硐沟、猪嘴哑吧等矿床对比。结合其早古生代构造演化历史、古洋脊或弧间、弧后拉张环境确定矿床类型 ,将上述 3个矿床归属为蛇绿岩Cu(Zn)_S型矿床 (类塞浦路斯型 )。建立综合成矿模式的基本要求 :(1)矿床具有一定的时控性 ,有一定的含矿层位 ;(2 )生长性断裂的积极参与 ;(3)海底火山喷发、喷气中心与次级盆地双向控制 ;(4 )多元热流体成矿系统。Early Paleozoic massive sulfide deposits of ophiolitic type in North Qilian Mountains are distributed mainly in areas of Early and Middle Ordovician basic volcanic and volcano_sedimentary rocks. During the process from continental margin rifting to ocean spreading and the thrusting of island arc, ophiolite suites and massive sulfide deposits were formed. These deposits, similar to those of Cyprus_type ore deposits, are generally called ophiolite_type deposits. In this paper, basic geological and geochemical characteristics of many typical deposits are summarized, and their origins are determined. On such a basis, a comprehensive metallogenic model for the whole Shijuli orefield is set up. All this serves the purposes of guiding ore_hunting practice, enlarging ore prospects and pushing forward the prospecting work for this type of deposits both in North Qilian Mauntains and in the whole country.

关 键 词：北祁连山 早古生代 蛇绿岩 成矿模式 硫化物矿床 铜锌矿床 

分 类 号：P618.41[天文地球—矿床学] P618.43[天文地球—地质学]