玻利维亚波托西市岗鲁蒂约斯矿区锡矿床地质特征与成矿模式的探讨

On the Geological Features and Metallogenic Model of Gangludiyuesi Tin Deposit in Potosi City,Bolivia

玻利维亚波托西市岗鲁蒂约斯矿区位于南美洲安第斯成矿带中部。矿区内锡矿床主要产于近顺层侵入、缓倾的斜长斑岩的内外接触带中,缓倾斜长斑岩内外接触带地层为白垩系上段紫红色粉砂岩与中段灰白色细砂岩、硅质砂岩。矿床成因类型为受地层控制的层状岩浆热液型锡石-硫化物型矿床。

Gangludiyuesi deposit in Potosi city of Bolivia is located in the middle of South America Andean metallogenic belt. Tin deposit is mainly produced into the inner and outer contact zone of near bedding intursion and gently inclined plagiophyre. The inner and outer contact zone layer of near gently inclined plagiophyre are the amaranth siltstone of upper Cretaceous and gray fine-grained sandstone and silica sandstone of middle Cretaceous. The genesis type of deposit belongs to the layered magmatic hydrothermal type cassiterite-sulfide deposit which controlled by the strata.