摘要
虎圩金矿位于湿热多雨的江西省东部，赋存在东乡火山岩盆地北部，江南地体与赣中地体的拼接带上。因此，矿区断裂构造发育、岩浆活动频繁。金矿化产于燕山中期侵入的花岗闪长玢岩的内外接触带上。矿化以充填交代张性断裂构造带的脉状形式产出。矿体为不规则脉状和透镜状，具明显的垂直分带现象。上部为氧化矿石，具黑色土状，蜂窝状构造，Au含量达工业品位以上，形成金矿体。此外，氧化矿石还富Co，相对贫Cu、Zn、Ag和Pb。下部为铅锌硫化物矿石，具块状或浸染状构造。除Pb、Zn达工业要求外，还伴生Cu、Ag、An和Gd，具综合利用价值，其AU含量一般为＜0．5g／t。当含Au的铅锌硫化物出露地表后，在大气降水诸因素的作用下，硫化物转变为硫酸盐，其中许多组分淋失，Au残留富集成矿，形成表生富集型金矿。
The Huxu gold deposit, which is located in the eastern part of Jiangxi Province, occurs in the north of the Dongxiang volcanic basin and the jointing zone between the Jiangnan terrain and the Gangzhong terrain. Thereby, fault structures are well developed and magmatic activity frequently occurred. Gold mineralization occurs in the endo-and exo-contact zones of the Middle-Yenshanian granodiorite. The mineralization occurs as veins filling and metasomatizing tensile fractures. The orebodies occur as irregular veins and lenses. The oxidized ores exhibit black earthy and honeycombed structures. Their Au contents are so high as to be of industrial value. In addition, the oxidized ores are rich in Co and poor in Cu, Zn, Ag, and Pb, Pb-Zn sulfide ores exhibitmassive and impregnated structures. Au (<0. 5g/t), Cu, Ag and Gd, except for Pb and Zn, are at commercial importance.Affter exposure of the Au-bearing Pb-Zn sulfides, Pb-Zn sulfides would be converted to sulfates under the action of meteoric water. The residual Au was enriched to form the supergene enrichment-type gold deposits.
出处
《矿物学报》
CAS
CSCD
北大核心
1996年第3期278-283,共6页
Acta Mineralogica Sinica
基金
国家黄金科技攻关项目!90051-03-4
中国科学院地球化学开放研究实验室联合资助
关键词
硫化物矿床
含金
金矿床
Au-bearing sulfide
enrichment
surgene enrichment-type gold ore
