青海省天峻县疏勒河地区铜及多金属综合信息成矿预测  

APPLICATION OF COMPREHENSIVE INFORMATION IN METALLOGENIC PREDICTION OF COPPER AND POLYMETALLIC IN SHULE RIVER,TIANJUN COUNTY,QINGHAI PROVINCE

作　　者：张文斌 张子鸣 杨延峰 郑德胜 ZHANG Wen-bin;ZHANG Zi-ming;YANG Yan-feng;ZHENG De-sheng(The Second Institute of Geology and Mineral Exploration, Gansu Provincial Bureau of Geology and Mineral Exploration and Development, Lanzhou 730020, China;Northwest. Geological Exploration Institute of China Metallurgical Geology Bureau, Xi ＇an 710061, China)

机构地区：[1]甘肃省地矿局第二地质矿产勘查院,甘肃兰州730020 [2]中国冶金地质总局西北地质勘查院,陕西西安710061

出　　处：《甘肃地质》2018年第1期43-50,共8页Gansu Geology

基　　金：中国地质调查局矿调项目(1212011221054)

摘　　要：研究区位于中—南祁连弧盆系中祁连岩浆弧区。区内以沉积地层分布最为广泛,地层时代跨度大,其中青白口系碎屑岩与碳酸盐岩组成的建造、奥陶系中基性火山喷出岩—碳酸盐岩—碎屑岩建造及二叠系碎屑岩系与成矿关系密切。区内断裂纵横交错,褶皱发育,总体构造线以NW、NWW向为主,近EW向、NNE、NNW向次之。区域岩浆活动主要表现在加里东期,岩浆从超基性—基性—中酸性—酸性都有不同程度的出露。区内主要成矿类型有岩浆热液型钨钼矿、砂岩型铜矿、中低温热液型铜矿及铅锌矿。本文从成矿地质背景分析入手,研究了与成矿有关的地质特征,应用MORPAS软件将研究区划分为3 km×3 km的单元格,提取变量,构置证据图层,计算单元找矿信息量,对研究区进行了铜及多金属矿的成矿预测,圈定并评价了6处找矿靶区,其中Ⅰ类靶区3处,Ⅱ类靶区3处。为该区今后部署铜、钨钼、铅锌等矿产勘查工作提供了重要依据,指出了进一步工作的方向。The study area is located in Qilian magmatic arc zone in the middle-south Qilian arc basin.The distribution of sedimentary strata is the most widely distributed in the area,which the construction of clastic rocks and carbonate rocks in Qingbaikou and the set of basic volcano-carbonate-clastic rock construction in Ordovician and Permian clastic rock series are closely related to mineralization.The fracture crisscross and fold development in the area,the main general tectonic line is NW and NWW,the second is near EW、NNE and NNW.The regional magmatic activity is mainly manifested in the caledonian stage,and the magma is exposed to different degrees from the ultralization-basilicity-the acid-acid.The main metallogenic types in the area include magmatic hydrothermal tungsten molybdenum ore,sandstone type copper mine,middle and low temperature hydrothermal copper and lead-zinc ore.After the completion of 1 ∶ 50 000 mineralization project in this area,rich geological,geophysical,geochemical,remote sensing and mineral data have been accumulated,which has laid a good foundation for the comprehensive information mineralization prediction.From the analysis on metallogenic geological background,the research related to the ore-forming geological characteristics,the author applies the MORPAS software to divide the study area into 3 km × 3 km cells,extract variables,compose evidence layers,calculate the amount of mining information,and make metallogenic prediction of copper and polymetallic ore.Finally,six prospecting target areas have been delineated and evaluated in the study area（threeⅠclass target,threeⅡclass target）,which provide an important basis for the future deployment of copper,tungsten molybdenum,lead zinc and other mineral exploration in the area,and points out the direction of further work.

关 键 词：铜及多金属 综合信息 证据权法 找矿信息量法 成矿预测 青海 

分 类 号：P61[天文地球—矿床学]