The characteristics of tourmaline in Baiyanghe U-Be deposit and its implications for mineralization, Xinjiang
文献类型：期刊论文
| 作者 | Zhu YiTing2,3,4; Li XiaoFeng2,3,4; Zhang Long2,3,4; Wang Guo1; Zhang Di2,3 |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2019 |
| 卷号 | 35期号:11页码:3429-3442 |
| 关键词 | Tourmaline Chemical composition Granitic porphyry U-Be deposit Baiyanghe |
| ISSN号 | 1000-0569 |
| DOI | 10.18654/1000-0569/2019.11.11 |
| 英文摘要 | The Baiyanghe U-Be deposit is located in the Late Paleozoic Xuemisitan-Kulankazi island arc of the northwestern margin of the Junggar plate, Northwest China. It is the largest Be deposit (2. 2Mt of ore with grades ranging from 0. 2% to 1. 4%) in Asia. Orebodies in the deposit occur as fractures along contact zones between the Yangzhuang granite porphyry intrusion and Devonian pyroclastic country rocks and within the porphyry itself. Hydrothermal alteration minerals observed in the ores include hematite, fluorite, quartz, chlorite, and muscovite. Field and microscopic observations show that the fluorite, hematite, and muscovite are closely associated with U-Be-Mo mineralization. The primary U-bearing mineral is pitchblende, and the secondary U-bearing mineral is uranophane. The Be-bearing mineral is bertrandite, which mainly occurs as fine planar and 20 similar to 300 mu m long prismatic crystals within the dark purple fluorite veins. The gangue minerals are quartz, albite, K-feldspar, sericite, chlorite, and fluorite. Three types tourmaline were identified by their occurrences, e. g. hosted in basalt, in tuff and in granite in Baiyanghe U-Be-Mo deposit. Tourmaline occurred as spherical aggregate in basalt and tuff, some of which as fractures, whereas tourmaline hosted in granite occurred as veins. Tourmaline in tuff has obvious zonation. Based on field observation and petrography, the mineral chemistry of tourmaline is studied by using electron microprobe analysis. The results show that the tourmaline in Baiyanghe U-Be deposit belongs to the alkali schorl, but much differences exist by their occurrence. Tourmaline in basalt rich in Ti, Mg, Ca, and poor in Al, Mn, F. Tourmaline in tuff rich in Fe, Na, and poor in Mg, Ca. Tourmaline in granite rich in Al, Mn, F, and poor in Ti, Fe and Na. All of the tourmaline show the high F (0. 343 similar to 1. 117apfu) and Al (5. 648 similar to 7. 351apfu) concentration. The variation of chemical composition in tourmaline in Baiyanghe U-Be deposit suggests the interactions of exchange vector might exist, such as Al-YX square( Y+Na)(-1), Al-YX square(Y+ OH)(-1), FeMg-1, Fe3+ Al--(1), AlO(MgOH)(-1) and AlO( Fe3+OH)(-1). Tourmaline chemical composition indicates that the fluid which precipitated tourmaline rich in Al and F. Be may migrate mainly as fluoride or fluorine complex and U migrate mainly as fluoride or fluorocarbon in hydrothermal fluid. The precipitation of tourmaline or fluorite results in the instability of fluoride or fluorine complexes which containing U and Be, leading to the precipitation beryllium and uranium precipitated from hydrothermal fluids. |
| WOS关键词 | BORON ISOTOPIC COMPOSITIONS ; NORTHERN WEST JUNGGAR ; ATHABASCA BASIN ; FLUID EVOLUTION ; COMPOSITIONAL EVOLUTION ; TECTONIC IMPLICATIONS ; ELEMENT GEOCHEMISTRY ; PALEOZOIC PLUTONS ; GRANITE PORPHYRY ; MOLDANUBIAN ZONE |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000510188200011 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/95665]  |
| 专题 | 地质与地球物理研究所_中国科学院矿产资源研究重点实验室 |
| 通讯作者 | Li XiaoFeng |
| 作者单位 | 1.216 Geol Survey, China Natl Nucl Corp, Urumqi 830011, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China 3.Chinese Acad Sci, Inst Earth Sci, Beijing 100029, Peoples R China 4.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhu YiTing,Li XiaoFeng,Zhang Long,et al. The characteristics of tourmaline in Baiyanghe U-Be deposit and its implications for mineralization, Xinjiang[J]. ACTA PETROLOGICA SINICA,2019,35(11):3429-3442. |
| APA | Zhu YiTing,Li XiaoFeng,Zhang Long,Wang Guo,&Zhang Di.(2019).The characteristics of tourmaline in Baiyanghe U-Be deposit and its implications for mineralization, Xinjiang.ACTA PETROLOGICA SINICA,35(11),3429-3442. |
| MLA | Zhu YiTing,et al."The characteristics of tourmaline in Baiyanghe U-Be deposit and its implications for mineralization, Xinjiang".ACTA PETROLOGICA SINICA 35.11(2019):3429-3442. |
入库方式： OAI收割
来源：地质与地球物理研究所
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