摘要
Sannicolas锡银矿区位于东科迪勒拉古生代褶皱带,属于玻利维亚中部山区一个重要的多金属成矿带。该区受区域构造运动和变形变质作用的影响,无论是断层构造控矿的矿体,还是褶皱构造层控的矿体,均遭受区域动力变质热液和岩浆热液的侵蚀。通过研究矿化类型、蚀变等特征,认为该矿床主要形成于板块边缘,与年轻的火山弧或弧后盆地同硅铝质地壳深熔作用形成的钙碱性、碱性长英质岩浆有关。该矿床成因类型属于岩浆热液型多金属矿床。
The Sannicolas tin -silver deposit is located in the Paleozoic eastern Cordillera fold belt which is an important poly- metallic metallogenetic belt in the central mountainous area of Bolivia. Influenced by the regional tectonic movement, deformation and metamorphism in the district, both Sn - Ag orebodies controlled by fault structure and strata - bound fold structure undergone the re- form of the regional dynamic metamorphic hydrothermal and magmatic hydrothermal. By studying the types of mineralization, alteration and other characteristics, it is thought that the deposit formed in the plate margin, and is associated with the calc -alkaline, alkaline felsic magma which were formed by deep re - melting of the young volcanic arc or back - arc basin with the alumino - silicate crust. The genesis of the deposit is the magmatic hydrothermal type polymetallic deposit.
出处
《矿产勘查》
2013年第5期578-583,共6页
Mineral Exploration
