Stable isotope, chemical, and mineral compositions of the Middle Proterozoic Lijiaying Mn deposit, Shaanxi Province, China
文献类型：期刊论文
| 作者 | Yeh, HW; Hein, JR; Ye, J; Fan, DL |
| 刊名 | ORE GEOLOGY REVIEWS
 |
| 出版日期 | 1999-10-01 |
| 卷号 | 15期号:1-3页码:55-69 |
| 关键词 | Lijiaying Mn deposit Middle Proterozoic China stable isotopes rare earth elements carbonate minerals braunite ore |
| ISSN号 | 0169-1368 |
| 文献子类 | Review |
| 英文摘要 | The Lijiaying Mn deposit, located about 250 km southwest of Xian, is a high-quality ore characterized by low P and Fe contents and a mean Mn content of about 23%. The ore deposit occurs in shallow-water marine sedimentary rocks of probable Middle Proterozoic age. Carbonate minerals in the ore deposit include kutnahorite, calcite, Mn calcite, and Mg calcite. Carbon (-0.4 to -4.0 parts per thousand) and oxygen (-3.7 to -12.9 parts per thousand) isotopes show that, with a few exceptions, those carbonate minerals are not pristine low-temperature marine precipitates. All samples are depleted in rare earth elements (REEs) relative to shale and have negative Eu and positive Ce anomalies on chondrite-normalized plots. The Fe/Mn ratios of representative ore samples range from about 0.034 to <0.008 and P/Mn from 0.0023 to <0.001. Based on mineralogical data, the low ends of those ranges of ratios are probably close to ratios for the pure Mn minerals, Manganese contents have a strong positive correlation with Ce anomaly values and a moderate correlation with total REE contents. Compositional data indicate that kutnahorite is a metamorphic mineral and that most calcites formed as low-temperature marine carbonates that were subsequently metamorphosed. The braunite ore precursor mineral was probably a Mn oxyhydroxide, similar to those that formed on the deep ocean-floor during the Cenozoic. Because the Lijiaying precursor mineral formed in a shallow-water marine environment, the atmospheric oxygen content during the Middle Proterozoic may have been lower than it has been during the Cenozoic. (C) 1999 Elsevier Science B.V. All rights reserved. |
| WOS关键词 | RARE-EARTH ELEMENTS ; GEOCHEMISTRY ; MOBILITY |
| WOS研究方向 | Geology ; Mineralogy ; Mining & Mineral Processing |
| 语种 | 英语 |
| WOS记录号 | WOS:000083933600005 |
| 出版者 | ELSEVIER SCIENCE BV |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/75616]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Yeh, HW |
| 作者单位 | 1.Acad Sinica, Inst Earth Sci, Taipei 11529, Taiwan 2.US Geol Survey, Menlo Pk, CA 94025 USA 3.Chinese Acad Sci, Inst Geol, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yeh, HW,Hein, JR,Ye, J,et al. Stable isotope, chemical, and mineral compositions of the Middle Proterozoic Lijiaying Mn deposit, Shaanxi Province, China[J]. ORE GEOLOGY REVIEWS,1999,15(1-3):55-69. |
| APA | Yeh, HW,Hein, JR,Ye, J,&Fan, DL.(1999).Stable isotope, chemical, and mineral compositions of the Middle Proterozoic Lijiaying Mn deposit, Shaanxi Province, China.ORE GEOLOGY REVIEWS,15(1-3),55-69. |
| MLA | Yeh, HW,et al."Stable isotope, chemical, and mineral compositions of the Middle Proterozoic Lijiaying Mn deposit, Shaanxi Province, China".ORE GEOLOGY REVIEWS 15.1-3(1999):55-69. |
入库方式： OAI收割
来源：地质与地球物理研究所
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