陕西商洛马角寺钼矿区土壤地球化学特征及找矿前景——地球化学找矿的典型实例

Soil geochemical characteristics and prospecting potential in Majiaosi molybdenum area in Shangluo,Shanxi province ——Typical case of geochemical prospecting

陕西商洛马角寺钼矿位于小秦岭多金属成矿带西部,矿区出露元古界至新生界地层,区内褶皱和断裂较为发育。1∶50 000水系沉积物测量在本区圈出Mo、Pb、Zn等元素异常,指示有多金属找矿前景。在区内开展1∶10 000土壤测量工作,并对取得的大量数据进行统计分析,研究总结矿区土壤地球化学特征,显示本区Mo、(Au)为成矿元素,Ag、Pb、Zn等为指示元素;同时,在区内再次圈出Mo、Ag、Pb、Zn等元素异常,异常再现性较好。运用1∶2 000地球化学剖面对土壤异常进行查证,发现一条含钼矿化构造带(Q1),从中圈出Mo矿体多条。综合研究1∶10 000地球化学特征显示,本区仍有Mo、(Au)矿床的找矿前景。

BZMajiaoshi molybdenum deposit is located in the western polymetallic metallogenic belt of Small Qinling Mountains,Shangluo,Shanxi province.The exposed strata are from Proterozoic to the Cenozoic.The fold and fracture is de-veloped in the region.Element anomalies such as Mo,Pb,and Zn etc.have been circled by stream sediment survey of 1∶5 000 scale,which indicated a polymetallic ore prospect in the area.Soil survey work of 1∶10 000 scale in the region has been done. And statistical analysis on the large number of obtained data has been processed.Study on geochemical characteristics of soil in mining area display that the Mo,（Au）are ore-forming elements and Ag,Pb,Zn etc.belong to the indicator elements in this area.In addition,element anomalies such as Mo,Ag,Pb,Zn etc.are reflected again in the region.And abnormal reproduc-ibility is better.The verification of soil anomaly using geochemical profile of 1∶2 000 scale get a molybdenum mineralization belt （Q1）,in which many Mo ore bodies developed.Comprehensive study on geochemical characteristics of 1∶10000 scale shows that there is Mo,（Au）deposit prospecting in this area as well.