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通过对海南抱板金矿几个切穿矿脉剖面的矿石和围岩的铅同位素组成分析,发现铅同位素组成与矿的产出具有相关关系,铅同位素的异常可能反映了成矿物质来源深度的差异,据此可进行铅同位素化探评价。提出了“正异常以深部找矿为主,负异常注意扩大横向找矿”的原则。土外山地区是地表的浅层金矿化,而二甲、北牛为深源金矿化,在土外山地区深部应可能找到对应于二甲、北牛的深源金矿化层。
Through the analysis of lead isotopic compositions of ore and surrounding rock in several cut-through vein sections of the Baogu gold deposit in Hainan Province, it is found that there is a correlation between the Pb isotopic composition and ore output. The abnormal Pb isotope may reflect the source depth of ore- Difference, which can be lead isotope geochemical evaluation. Proposed the principle of “positive anomaly to deep prospecting, negative anomalies to expand lateral prospecting”. The extra-terrestrial mountainous area is the shallow gold mineralization of the earth’s surface, while the dimethyl and northern cattle are deep-source gold mineralization. Deep-source gold mineralization corresponding to the dimethyl and northern cattle should be found in the deep extra-terrestrial mountains.