青海祁漫塔格卡尔却卡地区铜多金属矿找矿预测

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。

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

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 ore-controlling 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 provide reference for conducting further exploration in the region.