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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。
Hu Wei gold mine is located in the hot and humid eastern Jiangxi Province, which exists in the northern part of Dongxiang volcanic basin, Jiangnan terrane and Ganzhong terrane splicing. Therefore, the fault structure of mining area develops and the magmatic activity is frequent. Gold mineralization occurred in the Yanshanian intrusive granodiorite porphyrite inner and outer contact zone. Mineralization takes the form of a vein that fills the tectonism of the tectonic zone of the Zhangjiakou fault. The ore body is irregular veins and lenticular, with obvious vertical zonation. The upper part is oxidized ore, with black earthy, honeycomb structure, Au content above the industrial grade, the formation of gold ore body. In addition, oxidized ores also are rich in Co, relatively poor in Cu, Zn, Ag and Pb. The lower part of the lead-zinc sulfide ore, with massive or disseminated structure. In addition to the industrial requirements of Pb and Zn, Cu, Ag, An and Gd are also associated with the comprehensive utilization value, and the AU content is generally <0.5g / t. When Au-containing lead-zinc sulfide is exposed to the earth’s surface, the sulphide is converted to sulphate under the action of atmospheric precipitation. Many of these components are leached and the Au remnant is enriched to form ore and enriched gold .