云南西畴小洞锑矿床成矿地质条件及找矿远景分析

Ore-forming geological conditions and Prospecting prediction of the Xiaodong Antimony Deposits in Xichou County,Yunnan Province

西畴小洞锑矿床分布在古陆边缘相对隆起与凹陷的过渡带,与区内的同生构造相伴而生,矿体贮存在中寒武世田蓬组下段浅海陆棚相碎屑岩-热水沉积岩中,严格受地层层位控制。由于受褶皱构造的影响,矿体呈似层状贮存于叠加褶皱背斜周围,产状随硅质岩层变化,属于变质热液改造的热水沉积型锑矿床。通过分析小洞锑矿床的成矿地质条件,认为小洞矿床的外围、大锡板一带、玉麦地一带、蚂蝗箐—六卫厂等区域具有较好的成矿条件。

Holes antimony deposit distribution on the edge of the ancient land of relative uplift and depression area, accompanied by syngenetic structures in the area of a born, orebody occur- rence in the lower Cambrian Tian Peng group neritic shelf facies metamorphic clastic rocks, hot water sedimentary strata, strictly by stratigraphic position control; Influenced by fold structure, ore body is like a layer surrounding the occurrence in the superimposed fold anti- cline, occurrence changes over the siliceous rock, the hot water deposition by metamorphic hydrothermal reformation type antimony deposit. Through the analysis of small hole antimo- ny deposit ore-forming geological conditions, put forward the small hole in the periphery of the ore deposit, a tin plate area, YuMai area, leeches wellknown-six defended the prospec- ting prospect areas such as the factory has good metallogenic conditions.