大义山羊角脑地区土壤地球化学特征及找矿预测研究

Study on Soil Geochemical Characteristics and Ore Prospecting in Yangjiaonao Area in Dayishan

羊角脑矿区位于钦杭成矿带东段的大义山复式岩体边缘,是寻找锡多金属矿的有利地段。为解决浅覆盖区的找矿问题,在该区开展1∶1万土壤地球化学测量;运用数学统计法、因子分析法和相关分析法对分析数据进行研究。结果表明Sn、Cu、As等元素可能参与了研究区的成矿作用。选择传统对数统计法在区内圈定了Sn、Cu、As异常,结果显示研究区内各元素异常明显,套合较好,大体呈近EW向展布。根据组合异常叠加特征圈定了3个综合异常区,最后通过槽探和钻探工程的验证,发现多条脉型锡多金属矿脉,取得了较好的找矿效果。

Yangjiaonao mining area is located at the edge of Dayishan complex rock mass in the east of Qinhang metallogenic belt,which is a favorable area for finding tin polymetallic ore.In order to solve the problem of prospecting in shallow overburden area,1∶10000 soil geochemical survey is carried out in this area.The results show that Sn,Cu,and other elements may be involved in the mineralization of the study area.The traditional logarithmic statistical method was used to determine the Sn,Cu and as anomalies in the inner circle of the study area.The results show that the anomalies of each element in the study area are obvious,well nested,and generally distributed in the EW direction.According to the stacking characteristics of combined anomalies,three comprehensive anomaly areas are delineated.Finally,through the verification of trenching and drilling engineering,multiple vein type tin polymetallic ore veins are found,and good prospecting results are achieved.