厚层覆盖区综合物化探方法找金试验研究——以广西兴安金石金矿为例

RESEARCH ON PROSPECTING Au DEPOSIT STUDY WITH GEOPHYSICAL AND GEOCHEMICAL METHOD FOR DEEPLY CONCEALED DEPOSIT——taking Jinshi Au deposit of Guangxi as an example

在兴安金石金矿外围 4号分散流异常区 ,通过地电化学提取金测量法 ,查明测区存在 5个走向规模小于 5 0 m的金异常区 ,W( Au) 最大值为 72 .4× 10 - 9,高出背景值十几倍 ,并藉综合土壤吸附汞测量 ,高精度磁测和激发极化法等多种物化探方法来确定这些异常区的地质、地球化学和地球物理特征 ,提出金矿成矿的有利部位在金的地电提取高异常区、高汞量异常区、高磁性异常区、低视电阻率异常区和中等视极化率异常区的“三高一低一中”的找矿模式。确定测区的北北东角 (右下角 )

In No.4 anomaly area of dispersion trains outside Jinshi Au deposit in Xingan, five Au anomalies which are less than 50m in trend by the method of the geoelectrochemical extraction,have been indentified ,and maximum w (Au) (72.4×10 -9 ) is more than 10 times that of background,and by using the methods of soil absorption Hg measurement, high procision magnetic measurement and the induced polorization mothed to determine geological, geochemical and geophysical feature related with anomalies,and a prospecting model of 'three high one low one medium' has been proposed,namely, mineralization lies within the most favorable position of the anomaly area of high geoeletro extraction, high soil absorption Hg, high magnet, low apparent resistivity and medium apparent chargeability, therefore, it is indicated that NNE zone of the area is favorable for mineralization.