桂西北MS金矿区岩石地球化学异常特征

本文通过对MS微粒浸染型金矿点进行了剖面和面积的岩石地球化学测量,及其结果并进行统计分析研究,认为该矿点具有如下特征:As—Sb—Hg—Au异常组合赋存于中三叠统百逢组中段砂页岩中,与层间破碎带有关; Hg、Sb异常较弱,As、Au异常较强且吻合,表明AS、Au异常是近矿异常。实践证明,该法具有较好的找矿效果,据初步评价认为可望找到一个中型规模的金矿床。

CHARACTERISTICS OF ROCK GEOCHEMICAL ANOMALIES IN THE MS GOLD DISTRICT,NORTHWESTERN GUANGXI

This paper is based on the study of the data obtained by profile and area rock geochemical survey in the MS micro-grained gold district in Northwestern Guangxi. The result of the study shows that the gold district has the following geochemical characteristics: (1) As-Sb-Hg-Au anomalies occur in the sandstone and shale of the Beifeng Formation (Middle Triassic) adjacant to the major fault, and is linked to inter formational crust zones; (2) Hg and Sb anomalies are low in intensity while As and Au anomalies are higher and show better coincidence (this usually indicates that the As and Au anomalies are near orebody) . From the result of this study it can be seen that the discovery of a gold deposit of medium size is expectable, and that the geochemical methods employed proved to be effective in gold exploration.