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首页> 外文期刊>Ore Geology Reviews: Journal for Comprehensive Studies of Ore Genesis and Ore Exploration >Geology, fluid inclusion and stable isotope study of the Yueyang Ag-Au-Cu deposit, Zijinshan orefield, Fujian Province, China
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Geology, fluid inclusion and stable isotope study of the Yueyang Ag-Au-Cu deposit, Zijinshan orefield, Fujian Province, China

机译：福建省苏州紫金山厄-CU矿床地质，流体包容性和稳定同位素研究，福建省福建省

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The large Yueyang Ag-Au-Cu deposit is commonly regarded as a low-sulfidation epithermal deposit in the Zijinshan orefield, Fujian Province, southeastern China. The Ag-Ag-Cu orebodies hosted in the Zijinshan granitic batholith are mainly stratoid and lens in shape, and controlled by a series of NW-trending listric faults with shallow dip angles. Four mineralization stages are recognized on the basis of mineral assemblage, ore fabrics, and crosscutting relationships of the ore veins, namely: pre-ore (pyrite + sericite + quartz chlorite), main Cu (chalcopyrite + pyrite + sericite + quartz +/- bomite), main Ag-Au (Ag and Au minerals + pyrite + quartz + adularia +/- calcite +/- apatite +/- chalcopyrite +/- galena +/- sphalerite) and post-ore (quartz +/- chalcedony +/- calcite) stages. Fluid inclusions (Fis) in the deposit include aqueous liquid-rich (WL-), aqueous vapor-rich (WV-), and minor carbonic (C-) and daughter mineral-bearing (S-) type ones. WL-subtype is the main inclusion type in the Yueyang deposit, accounting for more than 90% in proportion in each stage. Minor WV-subtype inclusions occur in both the main Cu and Ag stages, while the C type and S-type ones are only observed in the main Cu stage. Fluid inclusion and H-O isotope study indicated that the ore-forming fluid of the main Cu stage is primarily magmatic vapor, which further underwent fluid boiling and mixing with meteoric water, while the ore-forming fluid of the main Ag stage is meteoric water-dominated, and the precipitation of silver and gold was mainly resulted from fluid boiling and the precipitation of other sulfides. On the basis of the aforementioned geological, fluid inclusion and stable isotope studies, we proposed a two-stage model for the Yueyang deposit, including a magmatic vapor-related porphyry type Cu mineralization and meteoric water-related low-sulfidation epithermal Ag-Au-Cu mineralization, although the porphyry Cu mineralization is very limited in scale. The mineralization and exhumation depths of the Yueyang deposit are estimated to be 448 527 m and 18 97 m, respectively. By comparison with the exhumation depths of other deposits in the Zijinshan orefield, it is suggested that more epithermal deposits could be found in the southwest of the orefield due to less uplift and exhumation therein. (C) 2017 Elsevier B.V. All rights reserved.
机译：大型岳阳Ag-Au-Cu矿床通常被视为中国东南福建省紫济山厄菲尔德的低硫化术沉积金。在Zijinshan花岗岩浴中托管的Ag-Ag-Cu矿体主要是标志性的标志性和透镜，并由一系列具有浅倾角的NW趋势隐藏故障控制。在矿物组合，矿石织物和矿石织物的横切关系的基础上识别出四个矿化阶段，即：矿石（硫铁矿+绢云母+石英氯酸盐），主Cu（黄铜矿+黄铁矿+绢云母+石英+/- Bomite），Main Ag-Au（Ag和Au矿物质+黄铁矿+石英+ Adularia +/- Calcite +/-磷灰石+/- Chalcopyrite +/- Galena +/- sphalerite）和矿石（Quartz +/- Chalcedony + / - 方解石）阶段。沉积物中的流体夹杂物（FIS）包括富含含水型含水型水溶液（WL-），富含蒸汽（WV-）和轻微的碳化物（C-）和雌性矿物含量（S-）类型。 WL-Subtype是岳阳存款中的主要包涵式，每阶段的比例占90％以上。在主Cu和Ag阶段发生次要的WV-亚型夹杂物，而C型和S型仅在主Cu阶段观察。流体包容和HO同位素研究表明，主Cu阶段的矿石形成流体主要是岩浆蒸气，其进一步磨削沸腾和与陨石混合的混合，而主要的AG阶段的矿石液体占分配而且银和金的沉淀主要是由液体沸腾和其他硫化物的沉淀导致。在上述地质，流体包容性和稳定的同位素研究的基础上，我们提出了岳阳矿床的两级模型，包括岩浆蒸汽相关斑岩型Cu矿化和流动水有关的低硫化术膜肌 - au- Cu矿化，尽管斑岩Cu矿化的规模非常有限。岳阳矿床的矿化和呼口深度估计分别为448 527 m和18 97米。通过与Zijinshan orefield中其他沉积物的挖掘深度进行比较，建议由于在其中的升高和挖掘时，可以在壁龛的西南部找到更多的曲面沉积物。 （c）2017 Elsevier B.v.保留所有权利。

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