| 刘桂梅,王身龙,夏训银,傅金强,王茜,袁航.广西博白县三叉冲矽卡岩型钨钼矿地球物理特征及找矿预测[J].矿产勘查,2020,11(5):994-1001 |
| 广西博白县三叉冲矽卡岩型钨钼矿地球物理特征及找矿预测 |
| Geophysical characteristics of the Sanchachong skarn type tungsten and molybdenum deposit and its prospecting prediction in Guangxi |
| 投稿时间：2020-01-02 |
| DOI： |
| 中文关键词: 钨钼矿 矽卡岩型 三叉冲 方法试验 地球物理特征 找矿预测 博白县 广西 |
| 英文关键词: molybdenum deposit,skarn type tungsten,Sanchachong deposit,method experiment,geophysical characteristics,metallogenic prognosis,Guangxi |
| 基金项目: |
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| 中文摘要: |
| 三叉冲钨钼矿位于博白—岑溪深断裂的西南段,是钦杭成矿带(广西段)大型钨钼矿床之一。矿体赋存于三叉冲复式花岗岩岩株与奥陶系中统东冲组接触带内,受北东向断裂控制。本文通过岩石物性分析,认为矿体具有中低电阻率和中高极化率的物性特征。在矿区开展了高精度磁测、激电中梯、激电测深和音频大地电磁法(EH4)试验,结合地质资料和地球物理异常特征分析,试验结果表明已知矿体部位磁异常不明显,矿体位于低阻向高阻变化梯度带和低极化背景下的相对高极化异常内,视电阻率值一般小于500 Ω·m,充电率值30mV/V左右,激电测深和EH4断面图可反映出矿体倾向和埋深。在三叉冲矿区和外围开展了综合物探成矿预测,圈定了2个成矿有利靶区。 |
| 英文摘要: |
| The Sanchachong tungsten and molybdenum ore located in the southwest of the Bobai-Qinxi depth fault, it’s a large tungsten molybdenum ore of Qin-hang metallogenic belt (Guangxi ). The deposit occurred in the contact belt between San-Cha-Chong compound granite stock and Dong-Chong formation of middle Ordovician, and its controlled by NE trend faults. This paper base on the results of rock physical property analysis, indicate ore deposit has the physical characteristics of both medium-low resistivity and medium-high polarizability. Through the high-precision magnetic measurement、induction electrical mid-gradient survey、IP sounding and high frequency magnetotelluric method(EH4) test, combined with geological data and geophysical anomaly analysis result, indicate that the magnetic anomaly of the known ore body is not obvious, the deposit located in the gradient band from low resistivity to high resistivity and the high polarizability anomalies in low polarizability background, the apparent resistivity is lower than 500Ω·m,and changeability is about 30mV/V, the IP sounding and EH4 prospecting result can indicate the dip direction and buried depth of the deposit. Base on the prospecting result carry out metallogenic prognosis in Sanchachong deposit and adjacent area, two prospecting targets are given. |
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