青海祁漫塔格卡尔却卡地区铜多金属矿找矿预测  

Ore Prospecting Prediction of Cu-polymetallic Deposit in Kaerqueka Area,Qimantage Area of Qinghai Province

作　　者：王盘喜[1,2] 张鹏 王振宁 郭峰 冯乃琦 王红杰[1,2] WANG Panxi;ZHANG Peng;WANG Zhenning;GUO Feng;FENG Naiqi;WANG Hongjie(Zhengzhou Institute of Multipurpose Utilization of Mineral Resources,CAGS,Zhengzhou 450006,China;Key Laboratory for Polymetallic Ores'Evaluation and Utilization,Minitry of Natural Resources,Zhengzhou 450006,China;The Third Geological Exploration Institute of Qinghai Province,Xining 810008,China)

机构地区：[1]中国地质科学院郑州矿产综合利用研究所,河南郑州450006 [2]自然资源部多金属矿综合利用评价重点实验室,河南郑州450006 [3]青海省第三地质勘查院,青海西宁810008

出　　处：《金属矿山》2021年第11期129-141,共13页Metal Mine

基　　金：中国地质调查局地质调查项目(编号:DD20190269,DD20160073)。

摘　　要：卡尔却卡位于东昆仑造山带西段祁漫塔格地区,伯喀里克—香日德印支期金、铅、锌(铜、稀有、稀土)三级成矿带的最西端,区域矿产呈NW—SE向带状分布。前人对区内研究侧重于矿物学、矿床学和岩石地球化学,缺乏找矿预测研究。通过系统总结区内地质、矿产、物探、化探、遥感特征,建立了铜多金属矿找矿预测模型,开展了找矿预测。研究表明:①卡尔却卡地区典型矿床为铜多金属矿,主要成矿时代为印支期,含矿层位为奥陶纪祁漫塔格群,含矿岩性为矽卡岩、大理岩,接触带为最主要的控矿构造、次为断裂,印支期中酸性侵入岩与区内成矿关系最为密切,矿石矿物为黄铜矿、闪锌矿、方铅矿、辉钼矿等。②硫化物氧化带是重要的地表找矿标志;矽卡岩型多金属矿可引起正负伴生、强度大、形态规则、连续性好的强磁异常;局部重力异常达0.2~1.0 mGal,围岩密度较高时出现一级异常叠加更高的次级异常,围岩为较低密度岩体时,表现为幅值较大的似尖峰状异常;激电异常往往表现为低阻高极化特征。③依据已知矿(化)点、矿化线索及重要地球物理、地球化学异常和遥感异常,结合含矿建造,容矿岩石、重要控矿构造特征,圈定了6处多金属矿找矿远景区,可为区内开展下一步勘查工作提供借鉴。Kaerqueka is located in the Qimantag area of western section of East Kunlun orogenic belt,and the westernmost of Indosinian gold,lead and zinc(copper,rare earth)tertiary metallogenic belt in Berkarik-Xiangride.The regional mineral resources are zonal distribution of NW—SE.Previous studies in this area focus on mineralogy,depositology and lithogeochemistry,but lack of ore prospecting prediction research.Through the systematic summary of the geological,mineral resource,geophysical,geochemical and remote sensing characteristics in this area,the Cu-polymetallic ore prospecting prediction model is established,and the ore prospecting prediction is carried out.The study shows that:①The typical deposits in Kaerqueka area are Cu-polymetallic deposits,and the main metallogenic epoch is Indosinian.The ore-bearing layer is the Qimantag Group of Ordovician,the ore-bearing lithology is skarn and marble,and the contact zone is the most important orecontrolling structure,followed by faults.The intermediate-acid intrusive rocks in Indosinian are most closely related to regional mineralization.The ore minerals are chalcopyrite,sphalerite,galena,molybdenite,etc.②The sulfide oxidation zone is an important indicator for surface prospecting.Skarn polymetallic deposit can cause strong magnetic anomaly of positive and negative associated,high intensity,regular shape and good continuity.The local gravity anomaly is 0.2~1.0 mGal,the first-order anomaly superimposes the higher secondary anomaly when the density of the surrounding rock is high,it shows a large amplitude of spike-like anomaly while the surrounding rock is low density rock mass.The IP anomaly is often characterized by low resistance and high polarization.③Based on the known ore(mineralization)points,mineralization clues and important geophysical,geochemical anomalies and remote sensing anomalies,combined with ore-bearing formations,ore-bearing rocks and important ore-controlling structures,six prospecting prospects for polymetallic deposits are delineated,which can pr

关 键 词：铜多金属矿 祁漫塔格 卡尔却卡 异常特征 找矿预测 

分 类 号：TD11[矿业工程—矿山地质测量] P612[天文地球—矿床学]