摘要
朋村铅锌矿区位于广西大瑶山铅锌多金属成矿带内,矿体呈层状、似层状、透镜状产于下泥盆统上伦组北东向层间断裂内,赋矿围岩为白云岩。矿区已有探矿工程控制矿体赋存标高50～-150 m,控制深度较小;物性测量结果显示铅锌矿石视电阻率平均值为2 500Ω·m,而赋矿围岩白云岩视电阻率平均值为29 542Ω·m,物性差异显著。为评价矿区深部成矿潜力,本次研究采用大功率可控源音频大地电磁测深法开展了视电阻率测深,测量结果表明矿区内己控制矿体均位于低阻异常内或低阻异常上盘,与低阻异常产状一致,两侧围岩总体表现为高阻。测量断面上低阻异常向深部可延伸约600 m,延伸较大,矿区深部仍具有较大成矿潜力。
Pengcun Lead -Zinc District is located on the Dayaoshan lead -zinc polymetallic metallogenic belt in Guangxi. The ore bodies occur as stratiform or stratoid beds and lenticular type in the NE fault zone of Lower Devonian Shanglun Formation,with wall rocks of dolomite. The occurrence level of the existing mineral exploration engineering in the district is controlled within 50 -150 m, comparatively shallow. The physical measurement results show that the average apparent resistivity of lead - zinc ore is 2 500Ω·m, while that of the dolomite wall rocks is 29 542Ω·m,dramatically different in physical nature. In order to evaluate the deep metallogenic potential of the district, this study applies the high-power Controlled Source Audio Frequency Magneto Telluric method to conduct apparent resistivity ex-ploration. The measurement shows that the controlled ore body in the district are located in low resistivity abnormity or the hanging wall of the low resistivity abnormity, and the wall rocks on both sides generally exhibit high resistivity. The abnormal low resistivity on the measured segments can extend to the depth of about 600 re,and the extension is large, indicating good metallogenic potentials in deep part of the district.
作者
郭佳
张作伦
牛博
Guo Jia;Zhang Zuolun;Niu Bo(China Non-Metallic Minerals Industry Association;China International Engineering Consulting Corporation)
出处
《黄金》
CAS
2018年第11期19-22,共4页
Gold
基金
国土资源部国土资源战略研究重点实验室开放课题(DD20160357)
关键词
铅锌矿床
可控源音频大地电磁测深法
电阻率
成矿潜力
朋村铅锌矿区
大瑶山铅锌多金属成矿带
lead - zinc deposit
Controlled Source Audio Frequency Magneto Telluric
resistivity
metallogenic potential
Pengcun Lead- Zinc District
Dayaoshan lead -zinc polymetallic metallogenic belt
