钦—杭成矿带(南段)粤西塘蓬——长山地化地物综合异常及其找矿远景分析  

Comprehensive Geochemical and Geophysical Anomalies and Ore-Prospecting Potential of the South Section of the Qin-Hang Metallogenic Belt,Tangpeng-Changshan Area,West Guangdong Province,China

作　　者：虞鹏鹏[1,2] 周永章[1,2] 陈宣谕[1,3] 梁锦[1,2] 李红中[1,2] 高乐[1,2] 

机构地区：[1]广东省地质过程与矿产资源探查重点实验室,广州510275 [2]中山大学地球科学与地质工程学院地球环境与地球资源研究中心,广州510275 [3]中国科学院广州地球化学研究所,广州510640

出　　处：《矿物岩石地球化学通报》2014年第3期366-376,共11页Bulletin of Mineralogy, Petrology and Geochemistry

基　　金：中国地质调查局项目(资[2010]矿评01-15-33)

摘　　要：为寻找塘蓬—长山地区矿产资源,采用1∶5万水系沉积物测量和1∶5万高精度磁场测量方法提取其中找矿信息。结果圈定出YC1、YC2、YC3三个综合异常区域,并明显地圈出Au、Ag、Pb、Zn中低温元素组成的异常区和Cu、Bi、W、Sn高温元素组合组成的异常区,异常范围大、强度高,展布受断裂带控制明显。1∶5万高精度磁场总体呈北东走向展布,分为北部正值背景区(强度一般为0~100nT)和南部低缓负值背景区(强度一般为-110^-50nT)。研究区内沿石英脉两侧有以绢云母化、黄铁矿化为主的围岩蚀变现象。本文认为区内热液型铅锌钨锡多金属矿床、石英脉型金(银)矿床有较好的找矿前景。Tangpeng-Changshan study area is located in the Qin-Hang metallogenic belt,Lianjiang city.1：50,000 stream sediment survey and 1：50 000 high precision magnetic field measurement were carried out to estimate the ore-prospecting potential of the Tangpeng-Changshan area.The study defined three comprehensive anomaly areas of YC1,YC2,and YC3,and anomaly areas of low temperature elements （Au,Ag,Pb,Zn） and high temperature elements （Cu,Bi,W,Sn）,which are of wide range,high strength,and obviously controlled by faults.1：50,000 high precision magnetic field shows NE-trend,and could be divided into a northern positive background area （intensity generally 0-100 nT） and a southern low and negative background area （intensity generally-110 to-50 nT）.Both sides of the quartz vein in the study area exist wall rock alterations of mainly sericitization and pyritization.Therefore,this study suggests that the quartz vein type gold （silver） and the high-temperature hydrothermal type Pb,Zn,W,Sn polymetallic deposits may have good ore-prospecting potential in the study area.

关 键 词：水系沉积物测量 高精度磁测 地球化学异常 钦—杭成矿带 

分 类 号：P618.2[天文地球—矿床学] P631[天文地球—地质学] P632