| 湘南黄沙坪多金属矿床花岗质岩浆性质及演化对成矿差异的约束 |
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| 引用本文： | 原垭斌,袁顺达,赵盼捞,张东亮.湘南黄沙坪多金属矿床花岗质岩浆性质及演化对成矿差异的约束[J].岩石学报,2018,34(9):2565-2580. |
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| 作者姓名： | 原垭斌 袁顺达 赵盼捞 张东亮 |
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| 作者单位： | 中国地质科学院矿产资源研究所;国土资源部成矿作用与矿产资源评价重点实验室;中南大学地球科学与信息物理学院 |
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| 基金项目： | 本文受国家自然科学基金项目（41672095、41373047）和中国地质科学院基本科研业务费专项经费（YYWF201711）联合资助. |
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| 摘 要： | 黄沙坪矿床是湘南地区最大的铅锌矿床,除铅、锌外,可供开采利用的矿种还包括钨、锡、钼、铜、铁、硫等。矿区内岩浆作用复杂、成矿元素多样、矿化类型丰富,是研究湘南地区斑岩-矽卡岩-热液脉型Cu多金属与矽卡岩W-Sn多金属复合成矿作用的理想对象。为查明矿区Cu多金属与W多金属复合成矿机理,本文在已有研究的基础上,从岩石学、矿物学及元素地球化学等方面分别对区内石英斑岩和花岗斑岩这两类成矿岩体开展了系统研究。结果表明,两类岩体具有相似的源区特征,但在源区性质及其演化过程方面仍存在差异:石英斑岩侵位深度更浅,具有相对较高的氧逸度和较低的形成温度;而花岗斑岩则侵位相对更深,具有更高的形成温度和极高的分异演化程度、更低的氧逸度。这些地球化学特征差异可能是制约石英斑岩成铜矿而花岗斑岩成钨矿的重要原因。
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| 关 键 词： | 复合成矿 岩体成矿差异 黄沙坪矿床 湘南地区 |
| 收稿时间： | 2017/9/15 0:00:00 |
| 修稿时间： | 2018/6/5 0:00:00 |
Properties and evolution of granitic magma in the Huangshaping polymetallic deposit, southern Hunan: Their constraints to mineralization differences |
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| YUAN YaBin,YUAN ShunD,ZHAO PanLao and ZHANG DongLiang.Properties and evolution of granitic magma in the Huangshaping polymetallic deposit, southern Hunan: Their constraints to mineralization differences[J].Acta Petrologica Sinica,2018,34(9):2565-2580. |
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| Authors: | YUAN YaBin YUAN ShunD ZHAO PanLao and ZHANG DongLiang |
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| Institution: | MLR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China,MLR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China,MLR Key Laboratory of Metallogeny and Mineral Assessment, Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China and Geophysics Information College of Central South University, Changsha 410083, China |
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| Abstract: | The Huangshaping polymetallic deposit is the largest Pb-Zn deposit in southern Hunan Province, and it also has large reserves of W, Sn, Mo, Cu, Fe and S being mined besides Pb and Zn. The deposit is characterized by its complex magmatism, multiple metal association and different mineralization type, which make it an ideal deposit to clarify the enigma that two distinct mineral assemblages, the porphyry-skarn-vein Cu and skarn W-Sn deposits, occurred in the same region in southern Hunan. To illuminate this issue, we present whole-rock geochemistry and mineral chemistry data of the quartz porphyry and granite porphyry in the Huangshaping ore district which is associated with skarn Cu and skarn W-Sn-Mo mineralization, respectively. The results indicate that the two types of ore-related rocks have the same source, and they have differences in magma properties and evolution processes:the quartz porphyry is characterized by relative shallow emplacement depth, high oxygen fugacity and low initial magma temperature; in contrast, the granite porphyry show features of relative deep emplacement depth, low oxygen fugacity, high initial magma temperature and a high degree of fractional crystallization. These differences may provide the main constraints on the mineralization differences of the quartz porphyry and granite porphyry in the Huangshaping polymetallic deposit. |
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| Keywords: | Complex mineralization Mineralization differences constrained by granites Huangshaping deposit Southern Hunan |
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