摘要
抱伦金矿为大型中温热液石英脉型矿床,矿石以含金石英脉型为主,次为含金蚀变岩型。主要金属矿物为黄铁矿和磁黄铁矿,次要金属矿物20多种;脉石矿物有石英、方解石、绢云母和绿泥石等。金矿物主要为自然金,次为金、铋和银的固溶体,含Au8.20%～99.30%,Ag≤52.71%,Bi≤91.20%。铋、碲矿物有自然金属、硫化物、铋化物、硫盐和碲化物等类型。金矿石含Bi0.18×10-6～16×10-6,平均4.11×10-6,富矿石中达419×10-6。该矿床属较特殊的富铋类型,与琼西戈枕剪切带的金矿有相似之处,在琼西-粤东金矿带大陆一侧存在类似矿床,它们在成因上均应与岩浆和韧—脆性断裂活动有关。
The Baolun gold deposit is a large mesothermal quartz vein deposit. The ores are mainly of quartz vein type and less commonly of alteration type. The dominant metallic minerals are pyrite and pyrrhotite with more than 20 subordinate metallic minerals. The gangue minerals include quartz, calcite, sericite and chlorite. Gold minerals are dominantly native gold and subordinately Au, Bi and Ag solutions, which contain 8.20-99.30% Au, ≤552.71% Ag and ≤91.20% Bi. The bismuth and tellurium minerals include native metals, sulfides, bismuthides, sulphosalts and tellurides. Gold ore contains （0.18-16）×10^-6 Bi, with an average of 4.11×10^-6, and the rich ore contains as high as 419×10^-6 Bi. This Au deposit belongs to a special Bi-rich hydrothermal vein type, displaying some similarities to Au deposits in the Gezhen shear zone on western Hainan Island. Similar bismuthiferous gold deposits occur on the continental side.They are genetically related to magrnatism and ductile-brittle faulting.
出处
《地质通报》
CAS
CSCD
北大核心
2006年第6期745-755,共11页
Geological Bulletin of China
基金
原地质矿产部定向科研项目《海南省乐东九所-抱伦地区金、银、钼多金属矿控矿构造及成矿规律研究》(地科定97-16)
国土资源部地质调查项目《海南岛高品位大型热液金矿床调查预测与典型矿床研究》(200110000003)的部分研究成果.
关键词
海南岛
抱伦金矿
金矿石
成分
铋矿物
成因矿物学
Hainan Island
Baolun gold deposit
gold ore
composition
bismuthiferous mineral
minerageny
