热液型金矿床围岩蚀变过程中元素迁移规律——以张家口地区东坪、后沟、水晶屯金矿为例  

ACTIVE LAWS OF ELEMENT MIGRATION IN WALL-ROCK ALTERATION PROCESSES FOR HYDROTHERMAL GOLD DEPOSITS: AS EVIDENCED BY DONGPING, HOUGOU AND SHUIJINGTUN GOLD DEPOSITS

作　　者：魏俊浩[1] 刘丛强[1] 丁振举[2] 

机构地区：[1]中国科学院地球化学研究所,贵阳51002 [2]中国地质大学,武汉430074

出　　处：《矿物学报》2000年第2期200-206,共7页Acta Mineralogica Sinica

基　　金：国家"九五"攀登计划预选项目!(批准号:95预 39);国家杰出青年基金!(批准号:49625304)联合资助

摘　　要：张家口地区东坪、后沟、水晶屯金矿围岩蚀变发育 ,主要的蚀变类型有钾长石化、硅化、黄铁矿化、绿泥石化等。通过蚀变岩常量元素、微量元素的定量计算发现 ,三个金矿床围岩蚀变过程中元素迁移、富集有明显的规律 ,即常量元素 (SiO2 、K2 O、FeO) ,亲硫元素 (成矿元素 :Au、Ag、As、Sb、Bi、Pb、Zn)明显富集 ,其它亲铜亲铁元素 (Cr、Co、Ni、Cu)略有富集。There are several major types of altered rocks, such as K\|feldspathization, silication, pyritization, chloritization, etc. in the Dongping, Hougou, Shuijingtun gold deposits of Zhangjiakou area. The regularities found by quantitative calculation are obvious enrichment characteristic for major elements (SiO\-2, K\-2O, FeO) and metallogenic elements (sulphophile elements: Au, Ag, As, Sb, Bi, Pb, Zn) little enrichment trends for transitional elements (Cr, Co, Ni, Cu) in the altered rocks of three gold deposits. Altered hydrothermal solution is a high\|silicon alkali fluid carrying metallogenic elements from deep\|seated.

关 键 词：围岩蚀变 元素迁移 金矿床 热液型 

分 类 号：P618.510.1[天文地球—矿床学]