福建寿宁寨坪矿区银矿地质特征及找矿远景分析

The Geological Characteristics and Prospecting Potential of Zhaiping Silver Mine in Shouning County,Fujian Province

寨坪矿区地处闽东火山断坳带东北缘,位于华安—浙东Au-Pb-Zn-Ag-Mo-Cu-叶蜡石-明矾石成矿亚带内。区内银矿明显受断裂构造控制,矿体多呈脉状、透镜状贮存于北北东和北北西向断裂带中,少数产于花岗斑岩体与南园组火山岩接触带内。通过地质测量、化探测量和探矿工程揭露,目前已发现4个矿脉带和7条银矿体。综合分析认为,矿区银矿成矿物质主要来源于南园组火山岩和燕山晚期侵入的花岗斑岩,寨坪银矿属于浅层低温热液型银矿床,具有较好的找矿前景。

Zhaiping mine is located in the northeastern of volcano rift belt in eastern Fujian prov- ince, and metallogenic subzone of Au-Pb-Zn-Ag-Mo-Cu-pyrophyllite-alunite in Huaan-Zhe- dong. The silver deposits are obviously controlled by faults. The orebodies are mostly vein shaped and lenticular. The orebodies are mainly occurred in the NNE and NNW trending fault structures, a few in the contact zone of granite porphyry and volcano rock Nanyuan formation. Through geological survey, geochemical survey and prospecting engineering, 4 ore belts and 7 ore bodies have been found in the mine area. Comprehensive analysis shows that the mining of silver minerals mainly came from the volcano rock Nanyuan formation volcano rock and granite porphyry in late yanshanian, it belongs to the shallow low temperature hydrothermal type silver deposit and has good prospecting potential.