Source and location mechanism for lode gold deposits hosted in metamorphic rocks in northeastern Hunan, China

来源期刊：中南大学学报(英文版)2001年第2期

论文作者：LIU Liang-ming PENG Sheng-lin YANG Qun-zhou

文章页码：108 - 113

Key words：lode gold deposit; location; fluid focus; seismic pump; northeastern Hunan

Abstract: For understanding the source and location mechanismof lode gold deposits hosted in metamorphic rocks in northeasternHunan, the authors analyzed the REE (rare earth elements) in ores and their host rocks,metallogenic elements in host rocks near and distant fromthe ore-bodies, and characteristics of ore-controlling structures, and deduced their genetic implication. Their geochemical features of REE and metallogenic elements suggest that they are formed by mobilization of dispersed metallogenic materials in Lengjiaxi Group of Middle Proterozoic during deformation and metamorphism process, mainly in Wulingian period. From the attributes of ore-controlling structures and regularity of location of gold metallization, it is concluded that the location of gold deposits is closely related to reverse shearing. Ore-forming fluids are focused on the secondary faults and extension fractures of reverse shear zones of nearly EW strike by stress-driven diffusion and seismic pumping.