高原寒冷区地球电化学方法寻找隐伏金矿对比试验

为了解高原寒冷景观区隐伏金矿地电化学异常特征,选取辛曲矿区和扎家同哪矿区进行对比试验。结果表明,两个矿区的地电提取Au含量均较低,且多为难以连片的狭窄异常,但矿体的分布基本限定在地电化学综合异常范围内。两个矿区有不同的异常特征：产出较陡的辛曲金矿异常多呈狭窄的单峰,峰值与矿体头部相对应;而产出较缓的扎家同哪金矿,异常呈多峰异常形态,在矿头对应部位有异常峰,且异常沿矿体倾斜方向呈阶梯式变弱,表明在高原寒冷景观区地球电化学方法对隐伏金矿体赋存范围和产出形态均有指示作用。结合地电化学异常成因机制、成矿地质条件,初步构建了高原寒冷景观条件下破碎带型金矿地电化学找矿模型。

Comparative Test of Prospecting Hidden Gold Mine in Cold Plateau Area by Geoelectricalchemsitry

In order to study the geoelectrochemical anomaly features in cold plateau areas,the Xinqu and Zhajiatongna mines are selected in the comparative test.The test results show that Au contents are lows,and anomalies are narrow and cannot be merged into a zone.The distribution of ore body is limited in the geoelectrochemical anomaly areas.The anomalous features are different in the two mines.In Xingqu mining area,anomaly is steep unimodal,and the peak of the modal is on the top of the deposit.In Zhajiatongna mine,the anomaly is multimodal with gentle slope,anomaly peak is on the top of the deposit,but its strength decreases with a step rate along the slope.It shows that the geoelctrochemistry is effective to show the extent and occurrence of the ore bodies.Combined with the mechanics of geoelctrochemistry and the geological condition of the ore-forming,the respecting model is established in the landscape of cold plateau.