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金银矿体位于同一矿田并共存在同一个构造破碎蚀变带内 ,严格地受控于下石炭统梓门桥组 (C1 z)和上三叠统小坪组 (T3x)之间的滑覆构造破碎带 ,这一构造带也是 C1 z和 T3x间的平行不整合界面。围岩蚀变以硅化、粘土化和硫化物化为主。本文通过对金、银矿矿石及围岩的微量元素组成特征的分析 ,认为金、银矿物质来源是不同的 :金可能来源于矿区周围的下石炭统梓门桥组地层 ,银则来源于粤西地区广泛分布的中 -新元古代地层 (云开杂岩和震旦系 )。在对金、银矿体和围岩稀土元素地球化学研究的基础上 ,推断金、银成矿作用和围岩蚀变作用皆属热液交代作用的结果 ,而非热水沉积作用的产物
The gold-silver ore bodies are located in the same ore field and coexist in the same structural crustal alteration zone and are strictly controlled by the slip between the Lower Carboniferous Zimenqiao Formation (C1 z) and the Upper Triassic Xiaoping Formation (T3x) Covering the fault zone, this zone is also a parallel unconformity interface between C1 z and T3x. Wall rock alteration to silicification, clay and sulfide-based. Based on the analysis of the trace element composition of gold, silver ores and surrounding rocks, the authors think that the sources of gold and silver minerals are different: gold may come from the Lower Carboniferous Zimenqiao Formation around the mining area, while silver comes from The Meso - Neoproterozoic strata widely distributed in western Guangdong (Yun - Kai complex and Sinian system). Based on the REE geochemical study of gold, silver orebody and surrounding rock, it is inferred that the gold and silver mineralization and the alteration of wall rocks are the result of hydrothermal metasomatism rather than the product of hydrothermal sedimentation