| 黑龙江三道湾子金矿Au-Ag-Te系列矿物特征及其成矿流体 |
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| 引用本文： | 余宇星,许虹,吴祥珂,杨利军,田竹,高燊,王秋舒.黑龙江三道湾子金矿Au-Ag-Te系列矿物特征及其成矿流体[J].岩石学报,2012,28(1):345-356. |
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| 作者姓名： | 余宇星 许虹 吴祥珂 杨利军 田竹 高燊 王秋舒 |
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| 作者单位： | 中国地质大学,北京,100083 |
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| 基金项目： | 本文受中国地质调查局地质项目(1212011121083)和国土资源部公益性行业科研专项(200811011)联合资助. |
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| 摘 要： | 本文采用光学显微镜、扫描电镜和电子探针对黑龙江省三道湾子金矿中Au-Ag-Te系列矿物碲银矿、碲金银矿、针碲金银矿、斜方碲金矿和碲金矿进行了详细的矿物学研究,本次研究还发现Au2Te的存在。碲化物矿物多呈粒状或脉状分布于石英或硫化物矿物的裂隙中。Au-Ag-Te系列矿物中,Au含量与Ag含量呈负相关性,与Te含量呈弱的负相关性。结合Au-Ag-Te成分共生图解及镜下特征对金银碲化物矿物共生组合进行分析表明Te优先与Ag结合形成碲银矿或碲金银矿,只有成矿流体中Ag被大量消耗后,Te才与Au结合形成针碲金银矿、斜方碲金矿、碲金矿,最后当成矿流体中Te也被大量消耗后,Au才会形成自然金。氦、氩同位素研究表明石英—黄铁矿阶段流体包裹体中3He/4He值为0.01～0.03Ra,金银碲化物阶段3He/4He值为0.08～1.04Ra,指示金银碲化物阶段有大量地幔物质参与。
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| 关 键 词： | He-Ar同位素 碲化物 金矿 三道湾子 黑龙江 |
| 收稿时间： | 2011/10/10 0:00:00 |
| 修稿时间： | 2011/11/28 0:00:00 |
Characteristics of the Au-Ag-Te minerals and its ore-forming fluids in Sandaowanzi gold deposit, Heilongjiang Province |
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| YU YuXing,XU Hong,WU XiangKe,YANG LiJun,TIAN Zhu,GAO Shen and WANG QiuShu.Characteristics of the Au-Ag-Te minerals and its ore-forming fluids in Sandaowanzi gold deposit, Heilongjiang Province[J].Acta Petrologica Sinica,2012,28(1):345-356. |
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| Authors: | YU YuXing XU Hong WU XiangKe YANG LiJun TIAN Zhu GAO Shen and WANG QiuShu |
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| Institution: | China University of Geosciences, Beijing 100083, China;China University of Geosciences, Beijing 100083, China;China University of Geosciences, Beijing 100083, China;China University of Geosciences, Beijing 100083, China;China University of Geosciences, Beijing 100083, China;China University of Geosciences, Beijing 100083, China;China University of Geosciences, Beijing 100083, China |
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| Abstract: | By means of optical microscope, scanning electron microscope and electron probe analysis, we made a thoroughly study of the tellurides in the gold deposit of Sandaowanzi, Heilongjiang. Compound Au2Te is first discovered in this research, except for hessite, petzite,sylvanite, krennerite and calaverite. These telluride minerals appear as granule, intergrowth or veinlet in the fractures of sulfides and quartz. In the system of Au-Ag-Te tullurides, the content of gold is negatively correlated with the content of silver and has a slightly negatively correlation with tellurium. The paragenetic association of Au-Ag tellurides in sandaowanzi gold deposits has been studied based on the experimental results in Au-Ag-Te ternary system. The experiments show that Te always give priority to combine with Ag to form hessite or petzite, sylvanite, krennerite and calaverite are generated only after a huge consumption of Ag, and only after Te in the fluid consuming a lot can nature gold be generated. Helium isotope studies of fluid inclusions indicate that the ratio 3He/ 4He is 0.01~0.03Ra in the stage of pyrite-quartz, while it is 0.08~1.04Ra in the stage of tellurides, which indicated that large quantities of mantle fluids were involved in the stage of tellurides. |
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| Keywords: | He-Ar isotope Tellurides Gold deposit Sandaowanzi Heilongjiang Province |
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