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河南省桐柏县上上河金矿物质组成及其地质意义
供稿: 李铭;郭跃闪 时间: 2018-11-19 次数:

作者;李铭;郭跃闪

作者单位:河南省地质矿产勘查开发局第一地质勘察院;河南理工大学资源环境学院

摘要:矿石组分及矿相研究表明,上上河金矿主要矿石矿物为自然金、自然银、黄铁矿、黄铜矿和黝铜矿,黄铁矿与金的关系密切。自然金常以包体金、裂隙金、粒间金形式存在于硫化物中或嵌布在矿物粒间,其中包体金占56%。金的成色较高,一般大于808‰。0.010~0.074 mm的中细粒金占89.96%,小于0.01 mm的微粒金占7.58%,大于0.074 mm的粗粒金仅占2.46%。含黄铜矿、黝铜矿的矿石,一般金品位较高。以硫化物为主的简单矿石类型和较粗的嵌布粒度,有利于金的磨矿和浮选。主要金属矿物中普遍存在的类质同象,对金矿形成有利。围岩对矿石的化学成分影响较大,反映了热液成矿的特征,指示找矿应以热液矿床为主要目标。

基金:中国地质调查局科研项目(12120114035401);

关键词:物质组分;地质意义;上上河金矿;

DOI:10.16186/j.cnki.1673-9787.2015.04.008

分类号:P618.51

Abstract:The results of the mineral composition and ore phase show that: the main ore mineral of Shangshanghe gold deposit is native gold,native silver,pyrite,chalcopyrite and tetrahedrite,and pyrite is closely related with gold. Native gold exists in sulfide or disseminated between mineral grains in form of inclusion gold,fissure gold,intergranular gold,and inclusion gold more than 56% of the total. Gold has quite high fineness,generally greater than 808 × 10-3. 0. 074 ~ 0. 01 mm in the fine grained gold accounted for 89. 96%,less than0. 01 mm particles grain accounted for 7. 58%,greater than 0. 074 mm of coarse grained accounted for only2. 46%. Ores containing chalcopyrite,tetrahedrite,generally have a higher grade of gold. The simple ore type mainly composed of sulfide and coarser disseminated extent is favor for grinding and flotation. Isomorphous is widespread in main metallic minerals,which is beneficial for forming gold deposits. Surrounding rock has a great influence on the chemical constituents of ore,showing the characteristics of hydrothermal mineralization,indicating that prospecting should take hydrothermal deposit as a main target.

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