摘要
沉积岩型金矿床是我国主要金矿类型，集中产在两个“金三角”区，储矿岩为寒武－三叠系的细碎屑浊积岩、热水硅岩和泥灰岩。背斜、穹隆和次级断裂控制矿体，地球化学指标与卡林型金矿相似。元素组合与现代温泉和海洋热水沉积物中的基本一致。有机质参与成矿，成矿流体可能主要为被加热改造的大气降水。
Sediment hosted gold deposits the major type of gold depositsin China,occurprincipally in two “triangular regions of gold”。The host rocks of ore bodies are generally the Cambrian to Triassic fine clastic turbidite,hydrothermal chert and marl.Gold ore bodies are structurally controlled by domes,anticlines and second order faults.This type of gold deposits is similar to the Carlin gold deposits (U.S.A.)in mineral assemblage and geochemical marks,and exhibits element association similar to those of the modern springs and hydrothermal sediments in sea floor.It is suggested that organic matters also played an important role in gold mineralization.The ore forming solution of gold may be thermal altered meteoric water and thermal source may be related to the local abnormal geotherm.
出处
《地球化学》
CAS
CSCD
北大核心
1997年第1期11-23,共13页
Geochimica
基金
国家黄金管理局攻关项目
国家自然科学基金
关键词
沉积岩型
金矿床
地球化学
找矿方向
sediment hosted gold deposit,geology and geochemistry,organic geochemistry
