EXPERIMENTAL GEOCHEMISTRY STUDY ON GOLD IN WATER-ROCK REACTION UNDER THERMAL FLUID SYSTEM AT MESO-LOW TEMPERATURE

作     者：GU Li 1, DAI Ta gen 2 (1. Bioengineering College, Chongqing University, Chongqing 400044, China 2. College of Resource, Enviroment and Civil Engineering, Central South University, Changsha 410083, China) 

作者机构：Bioengineering CollegeChongqing UniversityChongqing 400044China College of ResourceEnviroment and Civil EngineeringCentral South UniversityChangsha 410083China 

出 版 物：《Geotectonica et Metallogenia》 (大地构造与成矿学（英文版）)

年 卷 期：2001年第25卷第1期

页      面：140-148页

学科分类：070902[理学-地球化学] 0709[理学-地质学] 07[理学] 

基　　金：The Doctoral Foundation of the Education Ministry of China(970 53 0 1) The Natural Science Foundationof Hunan province (97JJ2 0 5) 

主　　题：Thermal fluid system water-rock interaction gold experimental geochemistry 

摘      要：Based on the knowing geochemical characteristics of wall rock in the Mobin gold deposit and composition of fluid inclusion in ore,water rock experiments were carried out, important achievements are acquired as following: Gold is mainly derived from the ore bearing wall rock,i.e., a series of epimetamorphic clastic gritstone, sandy slate, and tuffaceous slate in the Wuqiang Banxi Formation, Wuqiangxi Group. In thermal system with middle low temperature chlorine gold may be derived form stable complex ions, so it is quite important in gold metallogenic process. Sulphur and chlorine perform as the major negative ions throughout the gold activation and migration movement. The concentration of sulphur and chlorine ions, pH value and temperature are of deciding significance for gold activation, migration and precipitation.