湘东北地区脉型金矿床的活化转移

来源期刊：中南大学学报(自然科学版)1999年第1期

论文作者：刘亮明 彭省临 吴延之

文章页码：4 - 7

关键词：脉型金矿床;活化转移;冷家溪群;湘东北

Key words：vein type gold deposits; mobilization; Lengjiaxi Group; northeastern Hunan

摘    要：通过综合分析湘东北地区冷家溪群中金 的分布规律、矿石和围岩的稀土元素及同位素地球化学特征等,论证了湘东北地区的脉型金矿床是分散在冷家溪群中的金在冷家溪群的构造－热改造演化过程中活化 转移而成的,长距离的活化转移主要发生在武陵－加里东期,在印支－燕山期又发生了再活化转移,活化和再活化转移都是通过流体来进行的.

Abstract: All vein type gold deposits in northeastern Hunan are hosted in the Lengjiaxi Group, a group of low metamorphic rocks. By analyzing the distribution pattern of Au and associated elements in Lengjiaxi Group, REE and isotopic geochemical charactristics of ores and their host rocks and so on, it is demonstrated that, the vein type gold deposits are mainly formed by mobilization of dispersed gold in the Lengjiaxi Group during its tectonic thermal reforming processes. Long distant mobilization of gold and associated elements mainly took place in the Wulingian Caledonian period, and remobilization mainly in the Indonian Yanshanian period. The mobilization and remobilization processes of gold are carried out with the help of fluids.