土壤地球化学测量在光山县徐坪金矿普查中应用效果

Application effect of soil geochemical survey in general survey of Xuping gold deposit in Guangshan County

徐坪金矿位于东秦岭—大别山金银多金属成矿带的北麓,该成矿带地表植被覆盖严重,基岩露头少且不连续,地表的构造特征研究不清。因此在矿区圈定的小比例尺Au元素地化异常的基础上,开展大比例尺的土壤地球化学测量,圈定的综合异常的浓集中心,成为找矿的重点部位。本次通过这些工作,在矿区发现了14个Au矿(化)体。通过研究发现,在Au矿体出露的地表,不仅发育Au元素的浓集中心,Cu、Mo、Pb、Ag等元素的浓集中心也分布于相同或相近的部位,说明这些元素在该矿区为相关指示元素,具有相近的分布特征。因此,应用此找矿方法,根据Au、Ag等矿体的形成机理,在这个成矿带中其他的小比例尺Au元素地化异常中,有可能找到其他以金为主的多金属矿体,具有一定的借鉴意义。

Xuping gold deposit is located in the north foot of the gold and silver polymetallic metallogenic belt in Dabie Mountain, east Qinling. The surface vegetation of the belt is serious, the bedrock outcrops are few and discontinuous, and the structural characteristics of the surface are unclear. Therefore, on the basis of the small scale Au element geochemical anomaly delineated in the mining area, the large scale soil geochemical survey is carried out, and the concentration center of the comprehensive anomaly is the key part of prospecting. Through these work, 14 Au ore bodies have been found in the mining area. It is found that the concentration center of Au elements is not only developed on the surface of Au ore body, but also in the same or similar places of Cu, Mo, Pb, Ag, which indicates that these elements are related indicating elements in the mining area and have similar distribution characteristics. Therefore, applying this prospecting method, according to the formation mechanism of Au、Ag and other ore bodies, it is possible to find other polymetallic ore bodies dominated by gold in other small-scale Au geochemical anomalies in this metallogenic belt, which has a certain reference significance.