云南绿春县杨家寨黄竹林地区金及多金属地球化学异常评价及找矿模型

黄竹林地区位于云南哀牢山成矿带南部,杨家寨西南部,出露地层主要为下二叠统高井朝组砂板岩及石英砂岩.通过土壤地球化学剖面测量在黄竹林地区圈定了一个金异常区,异常区浓集中心明显,高值点连续分布,三级分带特征明显,元素相互套合较好,并确定黄竹林地区元素组合为Au-As-Sb-Ag-Mo-Hg和Cu-Pb-Zn.通过高井朝组地层岩石样原生晕分析,显示该区为韧性剪切带型金矿的地球化学前缘晕和近矿晕特征,具有中深部找矿潜力.通过地质矿产信息和地球化学信息提出了适合本地区的韧性剪切带型金及多金属找矿模型.

Evaluation of gold and polymetallic geochemical anomalies and ore-prospecting model in Huangzhulin area of Yangjiazhai in Luchun County,Yunnan Province

Huangzhulin area is located in the southern Ailaoshan metallogenic belt of Yunnan Province, and lies in southwest Yangji-azhai. The lower Permian sandstone, slate and quartz sandstone are main exposed strata. Through soil geochemical profile measure-ment, a gold anomaly was delineated in Huangzhulin area. The abnormal area has obvious concentration, continuous distribution of high value points, and obvious three-stage zoning. The anomaly is a good composite anomaly with the association of Au-As-Sb-Ag-Mo-Hg and Cu-Pb-Zn. Through the analysis of primary halos of rock samples from Gaojingchao Group, the authors detected the geochemical characteristics of the front halo and near-ore halo of the ductile shear zone type of gold deposit, which has the middle and deep prospec-ting potential. Based on the geological, mineral resources and geochemical information, the authors present an ore-prospecting model for ductile shear zone type gold and polymetallic deposits in this area.