成矿过程中由流体混合而导致金属沉淀的研究

STUDIES ON METAL DEPOSITION BY FLUID MIXING DURING ORE-FORMING PROCESSES

对成矿流体的研究已成为当前矿床学和地球化学领域重要的前沿课题，其主要进展之一就是确认由不同性质流体的混合导致金属沉淀是矿石形成的重要方式。从流体混合过程的现代自然现象研究出发，以近年来国内外最近研究成果为基础，以岩浆水与大气降水的混合为重点，综述了成矿过程中几种主要的导致金属沉淀的流体混合作用，并对其主要机理─—冷却、稀释、酸碱度改变和氧化还原反应──进行了初步讨论。

The study of ore-forming fluid is one of the major and frontier subjects in the field ofmineral deposits and geochemistry.Among which,the mixing of different kinds of fluid isan important way to cause the deposition of ore metal.Based on the latest research fruitsfrom home and abroad,this paper synthetically introduces the recent progress related tothis topic,which includes the present flocculation of metals during the mixing of river wa-ter and sea water,as well as several main processes of fluid mixing during different kindsof ore formation,especially the mixing of magmatic water and meteoic water.The princi-pal mechanisms of metal deposition from fluid mixing i.e.cooling,dilution,pH change,and redox reaction,have also been discussed in this paper.