SIC OpenIR
Geochemistry, mineralogy and mineral chemistry of the Welatam Cu-Mo-Bi-Au prospect, Northeast Myanmar
Wang, Changhong; Huang, Yongjian; Ma, Yu; Zhang, Zhifeng
2019-08-01
Source PublicationORE GEOLOGY REVIEWS
ISSN0169-1368
Volume111
SubtypeArticle
AbstractThe Welatam prospect, located in Kachin State, Northeast Myanmar, is the first discovered bismuth-gold locality within the Tengchong-Lianghe (Tengliang) metallogenic district. Two mineralization types, identified in this area, are related to three hydrothermal events. The massive sulfide mineralization was formed during the hydrothermal activities of stage I and II, producing mainly iron sulfides (e.g. pyrrhotite, chalcopyrite, pyrite, arsenopyrite). Whereas the activity of stage III resulted in quartz-molybdenite mineralization which is characterized by the deposition of molybdenite, galena, and Bi-Te-Au-bearing phases. The Bi-mineral assemblages suggest that at stage III, the prevailing temperatures were above 271 degrees C. Fluid-rock interaction that changed the pH, fO(2),fS(2), and, in particular, temperature in hydrothermal fluids is important in causing the precipitation of liquid bismuth from Bi3+. The high correlation between Bi and Au (R = 0.782) demonstrates that liquid bismuth may have played a crucial role in gold enrichment. Here, Bi-Au-bearing minerals commonly precipitate along the cleavages of molybdenite, forming a distinctive mineral assemblage. It may indicate that the cleavages, besides providing spaces for the precipitation of liquid bismuth, create local chemical conditions (e.g., reducing and catalytic surfaces) favorable for Bi-melt to scavenge Au from ambient fluid. The abundant Bi minerals, metal association (e.g., Cu, Bi, Mo, Au, Te, W), the restricted delta S-34 values ( - 7.3 parts per thousand to 1.9 parts per thousand) of sulfides, and the proximity with the Welatam monzogranites suggest a magmatic contribution to the ore-forming fluids.
KeywordBismuth minerals Fluid-rock interaction Liquid bismuth in gold enrichment Molybdenite Myanmar
DOI10.1016/j.oregeorev.2019.102973
Language英语
WOS Research AreaGeology ; Mineralogy ; Mining & Mineral Processing
PublisherELSEVIER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/26923
Collection中国科学院上海硅酸盐研究所
Recommended Citation
GB/T 7714
Wang, Changhong,Huang, Yongjian,Ma, Yu,et al. Geochemistry, mineralogy and mineral chemistry of the Welatam Cu-Mo-Bi-Au prospect, Northeast Myanmar[J]. ORE GEOLOGY REVIEWS,2019,111.
APA Wang, Changhong,Huang, Yongjian,Ma, Yu,&Zhang, Zhifeng.(2019).Geochemistry, mineralogy and mineral chemistry of the Welatam Cu-Mo-Bi-Au prospect, Northeast Myanmar.ORE GEOLOGY REVIEWS,111.
MLA Wang, Changhong,et al."Geochemistry, mineralogy and mineral chemistry of the Welatam Cu-Mo-Bi-Au prospect, Northeast Myanmar".ORE GEOLOGY REVIEWS 111(2019).
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Wang, Changhong]'s Articles
[Huang, Yongjian]'s Articles
[Ma, Yu]'s Articles
Baidu academic
Similar articles in Baidu academic
[Wang, Changhong]'s Articles
[Huang, Yongjian]'s Articles
[Ma, Yu]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Wang, Changhong]'s Articles
[Huang, Yongjian]'s Articles
[Ma, Yu]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.