Hydrothermal alteration associated with Mesozoic granite-hosted gold mineralization at the Sanshandao deposit, Jiaodong Gold Province, China
文献类型：期刊论文
| 作者 | Li, Xiao-Chun1; Fan, Hong-Rui1; Santosh, M.2; Hu, Fang-Fang1; Yang, Kui-Feng1; Lan, Ting-Guang1 |
| 刊名 | ORE GEOLOGY REVIEWS
 |
| 出版日期 | 2013-09-01 |
| 卷号 | 53页码:403-421 |
| 关键词 | Alteration geochemistry Physicochemical condition Fluid source Sanshandao deposit Jiaodong gold province |
| ISSN号 | 0169-1368 |
| DOI | 10.1016/j.oregeorev.2013.01.020 |
| 文献子类 | Review |
| 英文摘要 | The Sanshandao gold deposit (reserves of more than 200 t Au and average grade of 3.96 g/t), located at northwestern edge of the Jiaodong Peninsula, eastern North China Craton, is one of the largest gold deposits in the Jiaodong gold province. In this deposit, disseminated- and stockwork-style ores are hosted in Mesozoic granitoids; mineralization and alteration are largely controlled by the regional Sanshandao-Cangshang fault. Host granitic rocks for the deposit display a complex paragenetic sequence of alteration and mineralization. Activities of the Sanshandao-Cangshang fault created structurally controlled permeability allowing for infiltration of hydrothermal fluids, leading to diffusive K-feldspar alteration on the two fault planes. Later, large scale diffusive sericitization symmetrically developed across the main fault, and partially overprinted the earlier K-feldspar alteration. Following the sericitization, relatively small scale silicification occurred, but now it is only retained in the hanging wall of the main fault. Subsequently, the fault gouge formed as a "barrier layer", which is impermeable for later fluids to move upward. After that, strong pyrite-sericite-quartz alteration occurred only in the footwall of the main fault, and was accompanied by gold precipitation. The last stage carbonation and quartz-carbonate veins marked the waning of gold-related hydrothermal activity. Mass-balance calculations indicate complex behaviors of different types of elements during fluid-rock interaction. Most major elements were affected by intensive mineral replacement reactions. As expected, the fluid-mobile elements, LILE and LREE, generally show moderate to high mobility. It is notable that even the commonly assumed fluid-immobile elements, such as HREE and HFSE, tend to be changed to various degrees. In addition, Y-Ho, Zr-Hf and Nb-Ta fractionations are observed in altered domains. Studies on alteration assemblages and fluid inclusions suggest that the ore-forming fluids were characterized by low salinity (<= 8.4 wt.% NaCl equiv.), moderate temperature (300-400 degrees C), weakly acidic (pH: 3-5), and relatively reducing (log f(O2): similar to-28) characteristics. In this type of fluids, gold was most likely transported as Au(HS)(2)(-) T complex. With alteration going on, log (a(K)(+)/a(H)(+)) of fluids generally decreased due to significant formation of secondary K-bearing minerals. In addition, there might be a decrease of f(O2) from pre-gold alteration stage to the main gold mineralization stage, and decrease of f(O2) was probably one of the factors controlling gold precipitation. The Sr and Nd isotopic compositions of hydrothermal minerals, combined with previous H-O and He-Ar isotopic studies, indicate that the hydrothermal fluids were mainly derived from crustal sources (e.g., degassing of felsic magmas and meteoric water), but with involvement of mantle derived components. The gold mineralization event just coincided with reactivation of the North China Craton, as marked by asthenosphere upwelling, voluminous igneous rocks, and high crustal heat flow, which may have provided sufficient heat energy and fluid input required for the formation of the gold deposits. (C) 2013 Elsevier B.V. All rights reserved. |
| WOS关键词 | HIGH-FIELD-STRENGTH ; ORE-FORMING FLUIDS ; CRUST-MANTLE INTERACTION ; U-PB ZIRCON ; NORTH CHINA ; ISOTOPE SYSTEMATICS ; EASTERN CHINA ; OROGENIC GOLD ; SM-ND ; LITHOSPHERIC MANTLE |
| WOS研究方向 | Geology ; Mineralogy ; Mining & Mineral Processing |
| 语种 | 英语 |
| WOS记录号 | WOS:000318453000024 |
| 出版者 | ELSEVIER SCIENCE BV |
| 资助机构 | Natural Science Foundation of China(41173056) ; Natural Science Foundation of China(41173056) ; 100 Talents Programme of the Chinese Academy of Sciences ; 100 Talents Programme of the Chinese Academy of Sciences ; Crisis Mines Continued Resources Exploration Project of China Geological Survey(20089930) ; Crisis Mines Continued Resources Exploration Project of China Geological Survey(20089930) ; Natural Science Foundation of China(41173056) ; Natural Science Foundation of China(41173056) ; 100 Talents Programme of the Chinese Academy of Sciences ; 100 Talents Programme of the Chinese Academy of Sciences ; Crisis Mines Continued Resources Exploration Project of China Geological Survey(20089930) ; Crisis Mines Continued Resources Exploration Project of China Geological Survey(20089930) ; Natural Science Foundation of China(41173056) ; Natural Science Foundation of China(41173056) ; 100 Talents Programme of the Chinese Academy of Sciences ; 100 Talents Programme of the Chinese Academy of Sciences ; Crisis Mines Continued Resources Exploration Project of China Geological Survey(20089930) ; Crisis Mines Continued Resources Exploration Project of China Geological Survey(20089930) ; Natural Science Foundation of China(41173056) ; Natural Science Foundation of China(41173056) ; 100 Talents Programme of the Chinese Academy of Sciences ; 100 Talents Programme of the Chinese Academy of Sciences ; Crisis Mines Continued Resources Exploration Project of China Geological Survey(20089930) ; Crisis Mines Continued Resources Exploration Project of China Geological Survey(20089930) |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/86704]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Fan, Hong-Rui |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China 2.China Univ Geosci, Beijing 100083, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Xiao-Chun,Fan, Hong-Rui,Santosh, M.,et al. Hydrothermal alteration associated with Mesozoic granite-hosted gold mineralization at the Sanshandao deposit, Jiaodong Gold Province, China[J]. ORE GEOLOGY REVIEWS,2013,53:403-421. |
| APA | Li, Xiao-Chun,Fan, Hong-Rui,Santosh, M.,Hu, Fang-Fang,Yang, Kui-Feng,&Lan, Ting-Guang.(2013).Hydrothermal alteration associated with Mesozoic granite-hosted gold mineralization at the Sanshandao deposit, Jiaodong Gold Province, China.ORE GEOLOGY REVIEWS,53,403-421. |
| MLA | Li, Xiao-Chun,et al."Hydrothermal alteration associated with Mesozoic granite-hosted gold mineralization at the Sanshandao deposit, Jiaodong Gold Province, China".ORE GEOLOGY REVIEWS 53(2013):403-421. |
入库方式： OAI收割
来源：地质与地球物理研究所
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