Deformation, metamorphism and mineralization of the Mengku iron deposit, Altay, Xinjiang
文献类型：期刊论文
| 作者 | Lin LongHua1; Xu JiuHua1; Shan LiHua1,2; Chu HaiXia1; Wei XiaoFeng1,3; Wu ZengXuan4 |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2010-08-01 |
| 卷号 | 26期号:8页码:2399-2412 |
| 关键词 | Altay The Mengku Iron Deposit Deformation And Metamorphism Ore-forming Process |
| ISSN号 | 1000-0569 |
| 文献子类 | Article |
| 英文摘要 | The Mengku iron deposit, located in south margin of Altay orogenic belt, occurs in metamorphosed volcanic sedimentary rocks of the Lower Kangbutiebao Subgroup of Lower Devonian age. The ore bodies of the deposit are controlled by the Tiemuxiaergun syncline within the Kangbutiebao Group. Our study shows that the deposit has experienced three mineralizing periods, which are marine volcanic sedimentary mineralizing period, regional metamorphic mineralizing period and hydrothermal metasomatic mineralizing period. Regional metamorphic mineralizing period includes disseminated-banded magnetite stage and massive magnetite stage. Hydrothermal metasomatic mineralizing period includes calc-silicate metasomatism stage, sulfide stage and calcite-quartz vein stage. Among them, regional metamorphic mineralizing period is the most important one, with banded or massive magnetite formed by pressure-solution and enrichment. Skarn-like rocks were generated by metasomatic hydrothermal fluid flowing through silicon-rich and calcium-rich rocks and posterior to the formation of massive magnetite. The later copper mineralization was a hydrothermal metasomatic mineralizing event Homogenization temperatures of primary fluid inclusions in metamorphic layer quartz veins (Q(2)) are 235 similar to 511 degrees C, and those of secondary are 157 similar to 326 degrees C for lateral fluid inclusions. Homogenization temperature of fluid inclusions in the later quartz veins (Q(3)) varies between 122 similar to 337 degrees C. We got trapping pressures of coexisting pure CO(2) and H(2)O-NaCl fluid inclusions in Q, by isochore crossing method, which are 73 similar to 90MPa. The oxygen isotope data on magnetite show a range of -2 parts per thousand similar to +1. 28 parts per thousand in delta(18)O(SMOW) with the average of -0. 15 parts per thousand, which is similar to those of volcanic sedimentary-metamorphic iron deposits in other areas. Decrepitate curves of magnetite also clearly shows the features of multi-stage metamorphism superimposing. It could be presumed that the Mengku iron deposit was finally formed by enrichment of regional metamorphism and hydrothermal metasomatism during Altay Orogeny. |
| WOS关键词 | ASSEMBLAGE PYRITE ; GEOCHEMISTRY ; SOLUBILITY ; MAGNETITE ; ISOTOPE ; CHINA ; CONSTRAINTS ; GEOLOGY ; OXYGEN |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000281472400014 |
| 出版者 | SCIENCE CHINA PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/73129]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Lin LongHua |
| 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 3.Beijing Inst Geol Mineral Resources, Beijing 100012, Peoples R China 4.Xinjiang Ba Yi Iron & Steel Co Ltd Mengku Iron, Baosteel Grp Co, Fuyun 836100, Peoples R China |
| 推荐引用方式 GB/T 7714 | Lin LongHua,Xu JiuHua,Shan LiHua,et al. Deformation, metamorphism and mineralization of the Mengku iron deposit, Altay, Xinjiang[J]. ACTA PETROLOGICA SINICA,2010,26(8):2399-2412. |
| APA | Lin LongHua,Xu JiuHua,Shan LiHua,Chu HaiXia,Wei XiaoFeng,&Wu ZengXuan.(2010).Deformation, metamorphism and mineralization of the Mengku iron deposit, Altay, Xinjiang.ACTA PETROLOGICA SINICA,26(8),2399-2412. |
| MLA | Lin LongHua,et al."Deformation, metamorphism and mineralization of the Mengku iron deposit, Altay, Xinjiang".ACTA PETROLOGICA SINICA 26.8(2010):2399-2412. |
入库方式： OAI收割
来源：地质与地球物理研究所
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