Li-Be-Nb-Ta mineralogy of the Kuqu leucogranite and pegmatite in the Eastern Himalaya, Tibet, and its implication
文献类型：期刊论文
| 作者 | Zhou QiFeng3; Qin KeZhang1,4; He ChangTong1,4; Wu HuaYing3; Liu YuChao1,4; Mu XiangLong3; Mo Lin Chao3; Liu XiaoChi2 ; Zhao JunXing1
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| 刊名 | ACTA PETROLOGICA SINICA
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| 出版日期 | 2021-11-01 |
| 卷号 | 37期号:11页码:3305-3324 |
| 关键词 | Kuqu leucogranite and granitic pegmatite Spodumene-beryl-columbite-group minerals Eastern Himalaya Indicationfor lithium mineralization |
| ISSN号 | 1000-0569 |
| DOI | 10.18654/1000-0569/2021.11.05 |
| 英文摘要 | The rare -element minerals record important information of rock -forming process and metallogenesis. Himalaya is a famous leucogranite belt. The Kuqu intrusion is located in the Tethys Himalayan sedimentary sequence in the Eastern Himalaya. This study investigated two -mica granite, muscovite granite, tourmaline granite and granitic pegmatites in the Kuqu intrusion. The granitic pegmatites refer to either the pegmatite rocks that are included in and related to granite or the pegmatite zones that make up a single pegmatite dyke. The rare -element minerals identified in the Kuqu intrusion include spodumene, cookeite, beryl, columbite-tantalite, Y-hatchettolite and microlite. They are distributed in quartz -feldspar-muscovite pegmatite, quartz-albite-muscovite pegmatite, blocky feldspar-aplite, block feldspar-tourmaline aplite, spodumene-blocky feldspar-aplite, pegmatite rock in muscovite granite, and tourmaline granite. The EMPA and LA-ICP-MS analytical results indicate that spodumenes show four occurrences which consists of coarse -grained subhedral to euhedral spodumene, fine-grained symplectitic reaction border composed of spodumene and quartz, middle to fine-grained mosaic structure of spodumene, K -feldspar, albite and muscovite, and coarse -grained spodumene filled by cookeite veins. These occurrences of spodumene reveal a complex and fluid -rich unstable crystallization environment. There are homogeneous and heterogeneous beryl crystals in the intrusion. The internal zonation patterns for heterogeneous beryls are alteration border, patches and complex irregular zoning in BSE images. The substitution mechanisms of beryl in the Kuqu intrusion are channel -octahedral, channel -tetrahedral and alkali cations in channel. The columbite-group mineral crystals are composed of primary part and alteration border or display irregular zoning pattern, some of which are altered by Y-hatchettolite and microlite. Compared with primary parts, the alteration border and irregular zoned crystals have higher Ta/ ( Nb + Ta) values and lower Mn/ ( Fe + Mn) values, indicating fractional crystallization, supersaturation caused by strong undercooling, and fluid activities. Based on the studies of rare -element minerals, the single pegmatite dyke ( quartz -feldspar-muscovite pegmatite), pegmatite rock in muscovite granite and tourmaline granite display differences on the degree of fractionation of magma, evolution processes and fluid activities and they might be magma products of different stages. The Rb and Zn contents of beryl, and Sc20 Si02 and Pb0 contents of columbite-group minerals show correlation with the existed indicators for evolution degree of magma, but more studies are needed to carry out for them to be possible indicators. Considering the spodumene-bearing pegmatite indentified in the intrusion, the high degree of magma evolution, multistage of magmatism, complex fluid activities and being in a high lithium abundance value area, the Kuqu intrusion is an important potential area for future lithium prospecting in the Eastern Himalaya. |
| WOS关键词 | MAGMATIC-HYDROTHERMAL TRANSITION ; RARE-ELEMENT PEGMATITE ; GRANITIC PEGMATITE ; MUTUAL RELATIONSHIPS ; COLUMBITE-TANTALITE ; CHEMICAL EVOLUTION ; SPODUMENE ; BERYL ; CONSTRAINTS ; MINERALIZATION |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000747486100005 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/104917]  |
| 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 地质与地球物理研究所_岩石圈演化国家重点实验室 |
| 通讯作者 | Zhou QiFeng |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 3.China Met Geol Bur, Inst Mineral Resources Res, Beijing 101300, 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 | Zhou QiFeng,Qin KeZhang,He ChangTong,et al. Li-Be-Nb-Ta mineralogy of the Kuqu leucogranite and pegmatite in the Eastern Himalaya, Tibet, and its implication[J]. ACTA PETROLOGICA SINICA,2021,37(11):3305-3324. |
| APA | Zhou QiFeng.,Qin KeZhang.,He ChangTong.,Wu HuaYing.,Liu YuChao.,...&Zhao JunXing.(2021).Li-Be-Nb-Ta mineralogy of the Kuqu leucogranite and pegmatite in the Eastern Himalaya, Tibet, and its implication.ACTA PETROLOGICA SINICA,37(11),3305-3324. |
| MLA | Zhou QiFeng,et al."Li-Be-Nb-Ta mineralogy of the Kuqu leucogranite and pegmatite in the Eastern Himalaya, Tibet, and its implication".ACTA PETROLOGICA SINICA 37.11(2021):3305-3324. |
入库方式： OAI收割
来源：地质与地球物理研究所
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