Sub-volcanic hydrothermal mineralization of the Wulaga gold deposit, Heilongjiang, China: Evidences from melt and fluid inclusions
文献类型：期刊论文
| 作者 | Xu JiuHua1; Wei Hao1; Wang YanHai1; Zeng QingDong2; Liu JianMing2; Wang YongBin2; Mao Qian2 |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2012-04-01 |
| 卷号 | 28期号:4页码:1305-1316 |
| 关键词 | Melt inclusions Fluid inclusions Subvolcanic rock Wulaga gold deposit Heilongjiang |
| ISSN号 | 1000-0569 |
| 文献子类 | Article |
| 英文摘要 | The Wulaga gold deposit, located in the northeastern edge of the joint of Paleo-Asiatic and Pacific tectonic domains, is one of the most important gold deposits in China The ore bodies are mainly hosted in secondary faults of the Wulaga fault, and cryptoexplosive breccia zone within the Tuanjiegou plagioclase granite-porphyry, and in the layer fractures of metamorphic Heilongjiang Group. There are three types of fluid inclusions in quartz phenocryst of plagioclase granite-porphyry, that is, melt inclusions, primary L-V and L-V-S inclusions, as well as secondary L-V inclusions. Glassy melt inclusions are characterized by acid magma (SiO2 = 69. 5% similar to 73. 8%), with the trapping of temperatures higher than 800 degrees C. Secondary L-V inclusions in quartz phenocryst have 210 similar to 350 degrees C of homegenization temperatures (Th), which represents the features of sub-volcanic hydrothermal fluids and are coincide with those of pyrite-white chalcedony quartz stage (Q1), while salinities (5% similar to 7% NaCleqv) are slightly higher than those of Q1. Gold mineralization of the Wulaga can be divided into three stages. Fluid inclusions in pyrite-early white chalcedony quartz stage (stage I) are characterized by aqueous solution with homogenization temperatures of 154 similar to 355 degrees C, mainly in 230 similar to 270 degrees C. Salinities of fluid inclusions are 1. 3% similar to 8. 2% NaCleqv, with densities of 0. 53 similar to 0. 88g/cm(3). Homogenization temperatures of fluid inclusions in smoky gray chalcedony quartz-polymetallic sulfide stage (stage II) are 159 similar to 196 degrees C, mainly in 170 similar to 190 degrees C, with salinities of 2. 2% similar to 3. 2% NaCleqv and densities of 0. 79 similar to 0. 92g/cm(3). Those in calcite of carbonate-quartz stage (stage III) are mainly in 170 similar to 270 degrees C, with salinities of 0. 5% similar to 2. 9% NaCleqv and densities of 0. 80 similar to 0. 88g/cm(3). Ore-forming fluids in the main mineralization stage are characterized by mid to low temperatures, low salinities, and lack of CO2, which is similar with epithermal deposit related with continental volcanic-subvolcanic rocks in the world. Melt and fluid inclusion study show that gold mineralization has a close relationship with plagioclase granite-porphyry, and it is possible for silicate magma to produce salt-aqueous solution through immiscibility in magmatic differentiation. The Wulaga gold deposit should belong to epithermal gold deposit related to Cretaceous plagioclase granite-porphyry. |
| WOS关键词 | FREEZING-POINT DEPRESSION ; AQUEOUS FLUIDS ; IMMISCIBILITY ; PHILIPPINES ; EVOLUTION ; PORPHYRY ; MAGMAS |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000303970100026 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/84472]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Xu JiuHua |
| 作者单位 | 1.Univ Sci & Technol Beijing, Dept Resource Engn, Beijing 100083, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xu JiuHua,Wei Hao,Wang YanHai,et al. Sub-volcanic hydrothermal mineralization of the Wulaga gold deposit, Heilongjiang, China: Evidences from melt and fluid inclusions[J]. ACTA PETROLOGICA SINICA,2012,28(4):1305-1316. |
| APA | Xu JiuHua.,Wei Hao.,Wang YanHai.,Zeng QingDong.,Liu JianMing.,...&Mao Qian.(2012).Sub-volcanic hydrothermal mineralization of the Wulaga gold deposit, Heilongjiang, China: Evidences from melt and fluid inclusions.ACTA PETROLOGICA SINICA,28(4),1305-1316. |
| MLA | Xu JiuHua,et al."Sub-volcanic hydrothermal mineralization of the Wulaga gold deposit, Heilongjiang, China: Evidences from melt and fluid inclusions".ACTA PETROLOGICA SINICA 28.4(2012):1305-1316. |
入库方式： OAI收割
来源：地质与地球物理研究所
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