| 王西荣,胡长友,李绍侠,汪维炎.安徽戴家河金矿含金建造特征及金的赋存状态研究[J].矿产勘查,2017,8(4):574-582 |
| 安徽戴家河金矿含金建造特征及金的赋存状态研究 |
| Characteristics of gold-bearing formation and study on gold occurrence in Daijiahe gold deposit, Anhui |
| 投稿时间：2016-09-06 |
| DOI： |
| 中文关键词: 蚀变岩型 金矿 安徽 戴家河 |
| 英文关键词: altered rock type,gold deposit, Daijiahe, Anhui |
| 基金项目:安徽省市场风险勘查基金项目(编号:DK2008-06-10)资助。 |
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| 中文摘要: |
| 磨子潭—晓天火山岩盆地是安徽省重要的岩金矿产区,戴家河金矿位于该成矿带内,以蚀变岩型和石英细脉带型为主。通过地质调查、钻探施工等技术手段,大致查清区内金矿体和含金建造地质特征。对采集的11件样品,运用镜下鉴定、电子探针微区测试(X射线荧光光谱分析)技术、X射线背散射图像观察显微—粗粒金的形态、大小及其内部结构、构造特征,进行分析。通过研究,得出该区金矿体的形态、规模、产状主要受含金石英细脉带和含金破碎蚀变岩带控制,破碎蚀变岩型矿石品位一般为3×10-6～7×10-6,高于石英细脉带型金矿(2×10-6～3×10-6)；金主要以银金矿产出,金的成色变化于640～774之间,金的赋存方式有晶隙金、裂隙金和包体金3种类型,呈显微细粒状分布于石英中。 |
| 英文摘要: |
| The Mozitan - Xiaotian volcanic basin is an important gold-producing area in Anhui where Daijiahe gold deposit occurs, there are two types of gold deposits in this belt, i.e., altered rock type and quartz fine veinlet type. The geological characteristics of gold-bearing formation and gold orebodies were studied by the geological survey and drilling work.Total 11 samples were collected for studying gold occurrence of gold grain, morphology and internal texture by using microscopic identification, electron probe (X-ray fluorescence spectral analysis techniques), X-ray backscatter imagery. The microscope study result indicated that the shape, scale and occurrence of gold orebody was mainly controlled by gold-bearing quartz veinlet and fracture altered zone. The fracture altered rock type ore grade general ranges from 3×10-6 to 7×10-6, higher than that of quartz veinlet type gold orebody which is generally 2×10-6~3×10-6. The main gold-bearing mineral is mainly elctrum, the purity of gold ranges from 640 to 774. The main occurrences of gold are crystal, fissure gold and inclusion gold. The gold grain mainly occurs in form of micro fine grained in quartz vein. |
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