| Mineralogy and geochemistry of gold-bearing arsenian pyrite from the Shuiyindong Carlin-type gold deposit,Guizhou, China: implications for gold depositional processes | |
Wenchao Su ; Hongtao Zhang; Ruizhong Hu; Xi Ge; Bin Xia; Yanyan Chen; Chen Zhu
| |
| 2012 | |
| Source Publication | Mineralium Deposita
 |
| Volume | 47Issue:6Pages:653-662 |
| Abstract | Abstract in a structurally bound Au complex in arsenian pyrite. Geochemical modeling using the laser ablation-inductively coupled plasma mass spectrometry (LA-ICP-MS) analysis of fluid inclusions for the major ore forming stage shows that the dominant Au species were Au(HS)2鈭 (77%) and AuHS(aq)0 (23%). Gold-hydroxyl and Gold-chloride complexes were negligible. The ore fluid was undersaturated with respect to native Au, with a saturation index of 鈭3.8. The predominant As species was HAsO30. Pyrite in the Shuiyindong deposit shows chemical zonation with rims richer in As and Au than cores, reflecting the chemical evolution of the ore-bearing fluids. The early ore fluids had relatively high activities of As and Au, to deposit unzoned and zoned arsenian pyrite that host most gold in the deposit. The ore fluids then became depleted in Au and As and formed As-poor pyrite overgrowth rims on gold-bearing arsenian pyrite. Arsenopyrite overgrowth aggregates on arsenian pyrite indicate a late fluid with relatively high activity of As. The lack of evidence of boiling and the low iron content of fluid inclusions in quartz, suggest that iron in arsenian pyrite was most likely derived from dissolution of ferroan minerals in the host rocks, with sulfidation of the dissolved iron by HS-rich ore fluids being the most important mechanism of gold deposition in the Shuiyindong Carlin-type deposit. |
| Keyword | Gold Arsenian Pyrite Carlin-type Shuiyindong Guizhou China |
| Subject Area | 矿床地球化学 |
| Indexed By | SCI |
| Language | 英语 |
| Document Type | 期刊论文 |
| Identifier | http://ir.gyig.ac.cn/handle/352002/6737 |
| Collection | 矿床地球化学国家重点实验室_矿床地球化学国家重点实验室_期刊论文 矿床地球化学国家重点实验室 |
| Recommended Citation GB/T 7714 | Wenchao Su,Hongtao Zhang,Ruizhong Hu,et al. Mineralogy and geochemistry of gold-bearing arsenian pyrite from the Shuiyindong Carlin-type gold deposit,Guizhou, China: implications for gold depositional processes[J]. Mineralium Deposita,2012,47(6):653-662. |
| APA | Wenchao Su.,Hongtao Zhang.,Ruizhong Hu.,Xi Ge.,Bin Xia.,...&Chen Zhu.(2012).Mineralogy and geochemistry of gold-bearing arsenian pyrite from the Shuiyindong Carlin-type gold deposit,Guizhou, China: implications for gold depositional processes.Mineralium Deposita,47(6),653-662. |
| MLA | Wenchao Su,et al."Mineralogy and geochemistry of gold-bearing arsenian pyrite from the Shuiyindong Carlin-type gold deposit,Guizhou, China: implications for gold depositional processes".Mineralium Deposita 47.6(2012):653-662. |
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