摘要
对夹皮沟金矿的区域、矿带、矿体和成矿元素等构造地球化学特征进行了系统分析 ,结果表明 ,中生代太平洋板块向华北板块碰撞、俯冲 ,其效应激发了幔源和壳源岩浆的发生 ,成矿微量元素活化、迁移并形成区域性Au、Cu侧向分带。矿带内Cu Au Bi对称性分布、控矿构造组合类型与矿体原生晕序列的相关性以及稳定同位素所揭示的构造分馏等特征 ,都体现夹皮沟金矿带是幔-壳流体加入、矿质多源、中生代构造 -岩浆 -成矿作用的产物。
Genesis of Jiapigou gold deposits has been argued for a long time. Systematic tectono?geochemical analysis on the gold ore bodies, deposit belt and ore forming elements indicates that subduction and collision of the Paleo?Pacific plate with the North China plate during Mesozoic time resulted in generation of mantle?sourced and crust?sourced magmas and fluids. Mobilization and migration of ore?forming elements in the fluids yielded lateral Au, Cu zoning in regional scale and symmetric Au?Cu?Bi distribution within the one belt. Close relationship of controlling structure assemblage with features of primary halos, and stable isotope fractionation characteristics etc. show that the Jiapigou gold deposits were the products of Mesozoic tectono?magmatic and metallogenetic activity, in which both the mantle?sourced and crust?sourced fluids played an important role and ore forming materials were multiple?sourced.
出处
《高校地质学报》
CAS
CSCD
2000年第3期405-411,共7页
Geological Journal of China Universities
基金
国家攀登计划(95-预-25)
国土资源部重点基础科技项目(9501107)
国土资源部变质动力开放实验室联合资助项目
关键词
夹皮沟金矿带
构造地球化学
特征分析
Jiapigou gold deposits
tectono-geochemical analysis
characteristic analysis
