金在高压干体系下的迁移实验研究及其与位错、象力的关系分析  

EXPERIMENTAL STUDIES OF GOLD MIGRATION AT ANHYDROUS HIGH TEMPERATURE-HIGH PRESSURE CONDITIONS AND ITS RELATIONSHIP WITH DISLOCATION AND IMAGE FORCE

作　　者：王仲武[1] 

机构地区：[1]中国科学院地球化学研究所,贵阳550002

出　　处：《矿物学报》1996年第2期184-190,共7页Acta Mineralogica Sinica

基　　金：中国科学院矿床地球化学开放研究实验室资助

摘　　要：构造活动和动力作用与金的成矿不可分割，金的活化和多次富集成矿都要经过从含金矿物和岩石中析出这一过程，该过程主要由物理迁移和部分化学作用所致。高温高压干体系下实验研究、以及显微观察和电子探针分析认为，在动力作用下，含金矿物和岩石主要通过净边和溶蚀作用使金释放出来，在应力释放的裂隙构造部位富集沉淀。金的拆出是岩石的高温蠕变、位错的攀移消失、象力的吸附和加载应力等系列作用所引起。Structural activlties and kinetics are associated closely with the mineralization of gold,and the mobilization and enrichment of gold always involve the process in which gold is extracted from Au-bearing rocks and minerals. This process is due to the physical migration of elements and some chemical reactions between minerals and rocks and other materials.High temperature-high pressure experiments on a dry system, microscopic observations and electron microprobe analyses show that gold was removed fr0m Au-bearing minerals and rocks by means of resorption and purification, and was precipitated at the structural places where strain is released. The removal of gold is related to high-temperature deformation and disappearance of dis-locations, as well as to image force and strain.

关 键 词：金 高温高压 净化 熔蚀 位错 分析 

分 类 号：P578.11[天文地球—矿物学]