关于雪峰山一带金成矿区的成矿时代  

On the mineralization epoch of Xuefeng metallogenetic province

作　　者：刘继顺[1] 

机构地区：[1]中南工业大学地质系

出　　处：《黄金》1993年第7期7-12,共6页Gold

摘　　要：雪峰金成矿区的矿床(点)均赋存在前寒武纪地层中,但武陵-雪峰期成矿作用并不重要,火山沉积-变质热液成矿模式并不能很好地解释本区金矿床的形成.根据铅同位素资料分析和矿床构造地质研究,认为本区金的成矿时代与华南地区铀的成矿时代一样,主要为中新生代,金矿化可能主要与中新生代地壳拉张伸展作用所致的热水改造富集作用有关.All of the deposits and mineralized districts from Xuefeng gold metallogenetic province occur inside the pre-cambrian strata. Most of model ages from ore lead isotope in these gold deposits are less than 800Ma, so Wulin-gian-Xuefengian metallogenesis would not be of importance and the model involving volcanic sedimentation and metamorphic hydrothermal transformation could not explain well the formation of the gold deposits.On the basis of analyses of lead isotope and geologic setting of the deposits, it is revealed that the metallogenetic epochof gold,just being the same as those of uranium in South China, would be chiefly of meso-cenozoic and the gold mineralization is related to the remaking and enrichment of hydrothermal solution caused by the extension of the crust during meso-cenozoic.

关 键 词：金矿 成矿期 铅同位素 

分 类 号：P618.51[天文地球—矿床学]