云南李子坪锡多金属矿区地球化学特征及找矿预测

Geochemical characteristics and exploration prediction in Liziping tin polymetallic mining area,Yunnan

工作区在区域地球化学上属滇东南Sn、W、Ag、Au多金属地球化学区的南东端老君山Sn、Zn、Ag、W、Sb多金属地球化学分区。元素的化探异常分布与花岗岩和深变质岩系(花岗片麻岩、片麻岩、片岩类)分布规律基本一致,为Sn、W、Bi、U、Th、Be等元素高含量区,Li、B、Sr、Nb、Ta、Ag、As、Cu、Zn、Pb、Cd、Mo、F、Au等元素部分高含量区。土壤地球化学测量中采用一种非正规网度,系统研究土壤中化探元素富集规律,总结其与基岩及矿化体的联系。通过运用化探找矿方法,发现化探异常并进行查证,优选了重要异常,确定找矿靶区;结合已知锡多金属矿化体部位,开展地质地球化学剖面测量,圈定甲1类异常AP-3异常1个,经深部钻探工程验证,初步确定为一中型锡多金属矿床。

The work area belongs to Laojunshan Sn-Zn-Ag-W-Sb polymetallic mineralization area in the southeast part of Yunnan Province.The geochemical anomaly distribution of elements is basically consistent with those of granite and deep metamorphic rock series,granite gneiss,gneiss and schist.There are a high content area of Sn,W,Bi,U,Na2O,Th,Be and some parts of high content areas of Li,B,Sr,Nb,Ta,Ag,As,Cu,Zn,Pb,Cd,Mo,F,Au and other elements.An informal network is used in soil geochemical survey to systematically study the enrichment regularity of geochemical elements in the soil,and to analyze its relationship with bedrock and mineralization bodies.Through the geochemical exploration method,element anomalies are discovered and verified,important anomalies are selected and the prospecting target area is determined.With the combination of known tin polymetallic mineralization body position,the geological and geochemical profile survey is carried out,and AP-3 anomaly of class A1 is delineated and it is verified by the deep drilling project.The prospecting result is preliminarily shown that there is a medium-scale tin polymetallic deposit in the mining area.