青海省西藏大沟口金异常区物化探找矿分析

Analysis on the geophysical and geochemical prospecting in the Tibet Dagoukou gold deposit, Qinghai province

西藏大沟口金异常区属东昆仑造山带的西藏大沟印支-燕山期金、锑成矿带。通过在1/5万水系沉积物异常区开展1/1万土壤测量,圈出4处具矿致土壤异常,进而开展1/5000激电中梯剖面测量,圈出2条低阻高极化异常带。经探槽揭露,发现2条含金蚀变破碎带和5条金矿化体。在综合分析成矿地质条件、地球化学特征、地球物理特征和矿化体特征的基础上,对矿区找矿前景做了分析,认为区内中深部找矿潜力较大。

Xizang Dagoukou gold deposit belongs to the East Kunlun orogenic belt, Xizang Dagou YinzhiYanshan gold antimony metallogenic belt. 4 soil anomalies related to mineral deposit have been found with 1/10000 geochemical soil survey in the 1/50 000 geochemical stream sediment anomaly areas. And then 2 anomaly zones that have low resistivity and high polarization are delimited with measurement of 1/5 000 Ip Intermediate Gradient profile survey in the fore soil anomaly areas. After that, 2 auriferous alteration-fracture zones and 5 gold mineralizing bodies are found after exploratory trench exposing. On the basis of comprehensive analysis of the geological conditions, geophysical characteristics, geochemical characteristics and mineralization body characteristics, the potential prospecting is analyzed, and it is suggesed that the potential of mid-deep prospecting is better in this area.