卡林型金矿自然重砂特征及其找矿意义——以黔西南地区为例

黔西南地区是中国西南低温成矿域中卡林型金矿最重要的矿化集中区,由于该地区金的粒径极小,难以构成自然重砂异常,故不能直接运用自然金矿物来指示寻找黔西南的卡林型金矿。在贵州省矿产资源潜力评价项目的工作过程中,对黔西南地区的自然重砂矿物特征进行了较为系统的研究,发现采用细粒黄铁矿(载金矿物)、砷矿物(伴生矿物)、锑矿物和汞矿物的自然重砂组(综)合异常对寻找黔西南地区的卡林型金矿具有一定的指导作用和找矿意义。

Characteristics and prospecting significance of natural heavy minerals for Carlin-type gold deposits in southwestern Guizhou

Southwestern Guizhou is the most important mineralization concentration area of Southwest China low temperature metallogenic domain with micro-disseminated gold deposits. However, due to the extremely small particles of gold, it is difficult for gold to form natural heavy mineral anomalies, and hence the natural gold method cannot be applied in the direct search for such micrograined type gold deposits. The authors made a systematic study of the characteristics of natural heavy minerals in southwestern Guizhou. During the implementation of the mineral resource potential assessment project in Guizhou Province by the Natural Heavy Mineral Research Group, the authors found that anomalies of such natural heavy minerals as micro-fine grained pyrite (auriferous mineral), arsenic minerals (associated minerals) , antimony minerals and mercury minerals are helpful to finding this type of gold indirectly.