摘要
广西罗维多金属矿区出露地层为寒武系小内冲组和黄洞口组,分布多处土壤Ag、Pb、Zn、W、Bi异常,异常具Pb-Ag-Zn、Bi-W、Zn-Bi-W-Pb等组合特征。区内砂泥岩和铅锌矿石样品的磁性无明显差别。经高精度磁测圈出异常3个,反演估算异常磁源体顶面埋深23~43 m或更深;利用EH4大地电磁测深对高磁异常进行查证,以反演电阻率断面图确定低阻和中低阻区的空间分布。经综合＂地、化、物＂资料后进行钻探工程验证,发现多个银铅锌钨铋多金属矿体,找矿效果甚佳。
The outcropped strata in the Luowei deposit area,Guangxi are sandstone and mudstones of Xiaoneichong and Huangdongkou formation of Middle to Upper Cambian system. Soil geochemical anormalies of Ag,Pb,Zn,W and Bi are widely distributed,these anormaliesare characterized with Pb- Ag- Zn,Bi- W and Zn- Bi- W- Pb assoications. There are no apparent magnetic anomaly difference between mudstone,sandstone and Pb- Zn ore. Three magnetic anormalies have been outlined in the area by appying high precision MT survey,and the upper surface of magnetic- source of these anormalies are 23 to 43 meters deep or deeper below the surface based on inverse calculation. The MT anomalies were checked by EH4 Audio- frequency MT,the spatial distributions of anomalies of low to low- middle resistivities were determined by inversed cross- section diagraph. The test drilling test on these anormalies has found more Ag- Pb- Zn- W- Bi polymetallic orebodies,thus has achieved effective prospecting results.
出处
《矿产勘查》
2014年第5期780-788,共9页
Mineral Exploration
基金
2011年广西大规模地质矿产勘查项目(编号:桂国土资发〔2011〕46号)资助
关键词
银铅锌钨铋多金属矿床
高精度磁测
EH4大地电磁测深
钻探
广西罗维
Ag-Pb-Zn-W-Bi polymetallic ore deposit
high precision MT
EH4 Audio-frequency MT
test drilling
Luowei area
Guangxi
