青海省都兰县热水乡温泉地区磁力异常特征及找矿远景  

Magnetic anomaly characteristics of Wenquan area,Reshui township,Dulan county,Qianghai province and the ore prospecting potential

作　　者：欧栋 王见荥 OU Dong;WANG Jianying(The Second Comprehensive Geophysical Prospecting Brigade Co.,Ltd,Shaanxi Geological Mining,Xi'an 710016,China;Hebei Shallow Geothermal Energy Research Center,Hebei Institute of Geophysical Exploration,Langfang 065099,Hebei,China)

机构地区：[1]陕西地矿第二综合物探大队有限公司,西安710016 [2]河北省地球物理勘查院(河北省浅层地热能研究中心),河北廊坊065099

出　　处：《地质找矿论丛》2022年第3期367-376,共10页Contributions to Geology and Mineral Resources Research

摘　　要：青海省都兰县热水乡温泉地区具有较好资源潜力,陆续发现铅、锌、银、钼等多金属矿化现象。本文基于在该区开展1∶1万高精度磁测工作,对磁异常进行处理,推断区内断裂分布,并预测铅锌矿、钼矿等有利区。结果表明:区内有一级断裂3条,二级断裂41条;一级断裂控制地层展布及岩体分布,二级断裂控制地层局部分布和部分岩体分布,并为岩脉侵入通道。该区北部等轴状低缓中等磁力异常区可能为较大规模隐伏花岗闪长岩,此岩体与围岩接触部位是寻找铅锌矿化的有利区。研究区南部已发现的钼矿化带位于侏罗纪钾长花岗岩之中,呈现明显高磁异常,沿NW向断裂带边部的6处异常区为钼矿远景区。研究区中部沿一级断裂F_(1)存在隐伏的侏罗纪钾长花岗岩,岩体侵入为热水提供热源,断裂为热水运移通道,靠近察汗乌苏河的隐伏岩体附近为地热有利区。Wenquan area is potential for mineral resources prospecting and Pb-Zn-Ag-Mo polymetallic mineralization has been discovered here.High precision magnetic survey at scale 1∶10000 is carried out.Magnetic anomalies are outlined and processed,fault distribution inferred,potential areas of Pb-Zn ore and Mo ore predicted.There are 3 faults-I,41 faults-II.Fault-I controls distribution of strata and intrusive bodies Fault-II controls local distribution of some strata and is conduit of the dyke intrusion.The low and gentle equiaxial magnetic anomaly area in the south study area may be caused by large-sized blind granodiorite.Contact zone of granodioritic body with the wall rock is the target for Pb-Zn ore prospecting.In the south study area the known Mo mineralization zone occurs in the K-feldspar granite with evident high magnetic anomaly.6 anomaly areas along NE fault are the targets for Mo ore prospecting.In the central study area blind Jurassic K-feldspar granite intrudes along fault F_(1)(the fault-I).Intrusion of the granite supplies heat source for hot water and the fault serves as channel thus blind intrusive body about Chahanwusu river the target for geothermal resource prospecting.

关 键 词：高精度磁测 磁力异常 断裂构造 多金属矿化 地热 找矿远景 都兰县 青海省 

分 类 号：P631.221[天文地球—地质矿产勘探] P618.4[天文地球—地质学]