Concept of high-temperature granite-pegmatite Li-Be metallogenic system with a primary study in the middle Altyn-Tagh.
文献类型：期刊论文
| 作者 | Xu XingWang4,5,6; Hong Tao2,3; Li Hang4,5,6; Niu Lei4,5,6; Ke Qiang4,5,6; Chen JianZhong1; Liu ShanKe4,5,6; Zhai MingGuo4,5,6 |
| 刊名 | ACTA PETROLOGICA SINICA
 |
| 出版日期 | 2020 |
| 卷号 | 36期号:12页码:3572-3592 |
| 关键词 | High temperature Granite-pegmatite Li-Be deposit Metallogenic system The middle Altyn-Tagh |
| ISSN号 | 1000-0569 |
| DOI | 10.18654/1000-0569/2020.12.02 |
| 英文摘要 | The lithium-beryllium metals are the "critical" metals of national strategy and the national demand of the new lithium beryllium reserve is increasing. The lithium-beryllium (Li-Be) granitic pegmatite deposit is one of the important types of Li-Be deposits. It was generally suggested that melting of muscovite of metasedimentary rocks produces granitic melts, the parental magma of the Li-Be granitic pegmatite. However, the experimental investigation results show that the melting of muscovite produces low amount (<10% by volume) of melts with low efficiency of extracting Li-Be. This indicates that the enrichment of Li-Be during the melting of the muscovite to form the leucogranite may not be the main mechanism for the formation of granitic magma and the accumulation of Li-Be metals. On the basis that dehydration melting of the biotite would produce more than 50% (by volume) melts, it is suggested that the melting of biotite from the metagraywacke (biotite gneiss) and biotite-bearing tonalite gneiss might generate the high-temperature (> 800 degrees C) biotite granitic magma, which may evolve into leucogranite and Li-Be granitic pegmatite to form a high-temperature granite pegmatite Li-Be metallogenic system, as an important part of granite-pegmatite Li-Be metallogenic systems. The residual phase of the dehydrating and melting process of biotite is not rich in Li-Be minerals, thus, the evolved granitic magma might efficiently obtain Li-Be metals from the source rock, which might be a new enrichment mechanism for Li-Be metals. The middle Altyn-Tagh is a depopulated zone and a blank area for the prospecting of Li-Be metal mineralization research. Our research group has taken the lead in the geological survey and investigation of rare metal mineralization in the middle Altyn-Tagh since 2018. After two years of field investigation, two medium-large Li-Be granitic pegmatite deposits (Tugman Li-Be and Tugman North Li-Be deposits) and Tashisayi chrysoberyl deposit have been discovered, which have close genetic relationships with biotite granite, two-mica granite, and pegmatite. The magma differentiation of biotite granite in these deposits might generate leucogranite and Li-Be granitic pegmatite. The preliminary study indicates that the Li-Be granitic pegmatite deposits in the middle Altyn-Tagh are characterized by three different types and are formed during 468 similar to 460Ma, which is the Li-Be pegmatite district formed in the Caledonia in China. It is suggested that the middle Altyn-Tagh has great mineralization and prospecting potential to become a new and large Li-Be resource base in China. The high temperature granite-pegmatite Li-Be metallogenic system of the middle Altyn-Tagh includes the following types: (1) Type A: the continuous crystallization differentiation of high temperature biotite granitic magma can form the regular distributions of the biotite granite, two-mica granite, muscovite granite, and albite granite and the zonation of tourmaline halo, beryl halo, spodumene halo, and lepidolite halo, which is similar to that of the traditional model of the granitic pegmatite system. (2) Type B: under the shear tectonic setting, the crystallization and differentiation of granite has induced the round-shaped occurrences of mylonitized biotite granite, two mica granite, and muscovite granite under the shear deformation and the chrysoberyl-bearing albite granite will crosscut the round shaped rock complex to induce the formation of chrysoberyl-bearing pegmatite, beryl-bearing pegmatite and spodumene-bearing pegmatite in the adjacent area. The widely occurrences of chrysoberyl-bearing albite granite and chrysoberyl-bearing pegmatite are the remarkable label of Type B. (3) Type C: under compressional and shear deformation, the biotite granite has gneissic structure and is intergrow with the two-mica granitic pegmatite along with the gneissic schistosity of the host rocks without Li-Be mineralization. These characteristics might inspire that the tectono-dynamic deformation have controlled the crystallization differentiation of magmas and chrysoberyl could form from the high-temperature granite-pegmatite Li-Be metallogenic system, whereas, the pegmatites formed in the low differentiation and evolution stages of the granitic magma are not favorable for Li-Be mineralization. |
| WOS关键词 | TOPAZ-LEPIDOLITE GRANITE ; GRANULITE-FACIES METAMORPHISM ; BORON ISOTOPIC COMPOSITION ; RARE-METAL PEGMATITES ; P-T PATH ; PHASE-EQUILIBRIA ; SOUTH ALTYN ; U-PB ; GEOCHEMICAL CONSTRAINTS ; MELTING RELATIONS |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000605101000002 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/100012]  |
| 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 | Xu XingWang |
| 作者单位 | 1.Xinjiang Bur Geol & Mineral Explorat & Dev, Geol Party 3, Kuerle 841000, Peoples R China 2.Southern Marine Sci & Engn Guangdong Lab Zhuhai, Zhuhai 519000, Peoples R China 3.Sun Yat Sen Univ, Sch Earth Sci & Engn, Guangdong Prov Key Lab Geodynam & Geohazards, Guangzhou 510275, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 5.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China 6.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xu XingWang,Hong Tao,Li Hang,et al. Concept of high-temperature granite-pegmatite Li-Be metallogenic system with a primary study in the middle Altyn-Tagh.[J]. ACTA PETROLOGICA SINICA,2020,36(12):3572-3592. |
| APA | Xu XingWang.,Hong Tao.,Li Hang.,Niu Lei.,Ke Qiang.,...&Zhai MingGuo.(2020).Concept of high-temperature granite-pegmatite Li-Be metallogenic system with a primary study in the middle Altyn-Tagh..ACTA PETROLOGICA SINICA,36(12),3572-3592. |
| MLA | Xu XingWang,et al."Concept of high-temperature granite-pegmatite Li-Be metallogenic system with a primary study in the middle Altyn-Tagh.".ACTA PETROLOGICA SINICA 36.12(2020):3572-3592. |
入库方式： OAI收割
来源：地质与地球物理研究所
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