Characteristics of the Au-Ag-Te Minerals and Its Ore-Forming Fluids in Sandaowanzi Gold Deposit, Heilongjiang Province
详细信息
- 责任者：Yu Yuxing (China University of Geosciences ; Beijing 100083 ; China) ; Xu Hong
- 刊名：Acta Petrologica Sinica
- 出版年：2012
- 卷期：28(1)
- 关键词：金矿 ; gold ores ; 成矿流体 ; ore-forming fluids ; 黑龙江省 ; Heilongjiang Province
- 页码：p.345-356
- 图表：7 illus., 4 tables, 47 refs.
- 分类号：1001
- issnNo：ISSN1000-0569
- isbnNo：CN11-1922/P
摘要
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 Au 2 Te 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 3 He/ 4 He is 0.01～0.03 Ra 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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