高精度磁测与四道γ能谱在金矿床上的应用—─以阿希金矿为例

AN APPLICATION OF HIGH-PRECISION MAGNETICMEASUREMENT AND“FOUR γ CHANNEL ENERGY SPECTRUM”IN THE GOLD DEPOSIT—TAKING ASI GOLD DEPOSIT AS AN EXAMPLE

对阿希金矿床高精度磁测结果分析，发现了环状磁异常，它是火山岩地区控矿构造—环状构造的反映。对该异常进行了延拓处理，得出其浅部为环状和放射状断裂，深部为南北向断裂。对该矿床又作了四道γ能谱测量，发现它可以清晰的划分矿化蚀变带与围岩的界线，其基本规律是：钾道和总道含量在矿化蚀变带上明显升高。

Based on the analytical results of high precision magnetic measurement for gold deposit in Asi area,a circum-shape magnetic anomaly was found,which is the reflect of circum structures,i.e.ore control structures in volcanic rock regions.By the analysis of downward continuation of magnetic anomaly,we found out that the circum and radiate faults are developed in the shallow parts,while SN trending faults are develop in the deeper parts.Besides,by the sid of “four γ channel energy”the demarcation lines between the mineralization zone and wall rock are showed clearly.The basic characteristics are that the content for potassium and total channels are higher distinctly in mineralization zone,while the content for thorite channel is lower.