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In-situ elemental and boron isotopic variations of tourmaline from the Koktokay pegmatitic rare-metal deposit, China: Insights into external contamination and the source of the granitic pegmatite

文献类型：期刊论文

作者Bai, Yingxiong1,4; Shen, Ping1,4,5; Cao, Chong2,4; Li, Changhao1,4,5; Feng, Haoxuan1,4,5; Luo, Yaoqing1,4; Pan, Hongdi3; Suo, Qingyu1,4
刊名ORE GEOLOGY REVIEWS
出版日期2023-11-01
卷号162页码:21
关键词Tourmaline Chemical composition External contamination Boron isotopes Rare-metal granitic pegmatite
ISSN号0169-1368
DOI10.1016/j.oregeorev.2023.105683
英文摘要This study presents petrochemical and boron isotope compositions of tourmalines from the fertile (No. 3) and relatively barren (No. 1, 2b) pegmatite in the Koktokay pegmatitic rare-metal deposit, to better understand the influence of external contamination on pegmatite mineralization and the source of these pegmatites. There are four types of tourmalines that have been studied: (1) tourmaline in the tourmaline-mica nest of pegmatite No. 1 (Tur-N); (2) tourmalines in the comb-like structure of pegmatite No. 1 (Tur-C1), 2b (Tur-C2), and 3 (Tur-C3), respectively. Tur-N tourmaline is heterogeneous in backscattered electron (BSE) images, Tur-C1 and Tur-C2 appear to be homogenous crystals, while Tur-C3 exhibits to have a complicated zonal structure. These tourmalines are members of the alkali group tourmalines representing mostly dravite-schorl solid solutions. Tur-N contains the lowest Ca content. There is a general increase in the contents of Mg and Ca from Tur-C1 to TurC3, implying that the pegmatite melt was contaminated by the host rock (metagabbro) during the emplacement. The contamination's diffusive influx of Mg, Ca, and Fe components into the pegmatite melt impelled the crystallization of tourmaline during the emplacement, which subsequently triggered the deposition of rare element minerals. The external contamination implies that the closed system of melt is extremely favorable for the enrichment and mineralization of rare elements in the pegmatitic rare-metal deposit. The boron isotopes vary slightly among the four types of tourmalines. The B-isotope composition of Tur-C3 is the heaviest (-11.63 +/- 0.05 %o to -13.16 +/- 0.05 %o), followed by Tur-C1 (-12.29 +/- 0.06 %o to -12.93 +/- 0.05 %o) and Tur-C2 (-12.51 +/- 0.05 %o to -13.21 +/- 0.05 %o), Tur-N contains the lowest delta 11B value (-13.20 +/- 0.05 %o to -13.76 +/- 0.05 %o). Synthesized with the previous research results, we hold that the boron isotope of tourmaline (Tur-C3) in the comblike structure of No. 3 pegmatite might represent the isotope composition of its initial magma, indicating that the tourmaline and associated pegmatite may derive from the melting of clastic sedimentary rock from the Habahe Group forming in Mid Ordovician to Early Devonian in the Chinese Altay orogenic belt.
WOS关键词NO. 3 PEGMATITE ; U-PB ZIRCON ; NW CHINA ; MOLDANUBIAN ZONE ; NORTHWESTERN ONTARIO ; CHEMICAL EVOLUTION ; FIBROUS TOURMALINE ; TANCO PEGMATITE ; FLUID PROCESSES ; GROUP MINERALS
资助项目National Natural Science Foundation of China[91962213] ; International Partnership Program of International Cooperation Bureau, Chinese Academy of Sciences[132A11KYSB20190070] ; International S&T cooperation program of Shanghai Cooperative Organization[2020E01043] ; National Key R&D Program of China[2018YFC0604004]
WOS研究方向Geology ; Mineralogy ; Mining & Mineral Processing
语种英语
WOS记录号WOS:001106540900001
出版者ELSEVIER
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; International Partnership Program of International Cooperation Bureau, Chinese Academy of Sciences ; International Partnership Program of International Cooperation Bureau, Chinese Academy of Sciences ; International Partnership Program of International Cooperation Bureau, Chinese Academy of Sciences ; International Partnership Program of International Cooperation Bureau, Chinese Academy of Sciences ; International S&T cooperation program of Shanghai Cooperative Organization ; International S&T cooperation program of Shanghai Cooperative Organization ; International S&T cooperation program of Shanghai Cooperative Organization ; International S&T cooperation program of Shanghai Cooperative Organization ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; International Partnership Program of International Cooperation Bureau, Chinese Academy of Sciences ; International Partnership Program of International Cooperation Bureau, Chinese Academy of Sciences ; International Partnership Program of International Cooperation Bureau, Chinese Academy of Sciences ; International Partnership Program of International Cooperation Bureau, Chinese Academy of Sciences ; International S&T cooperation program of Shanghai Cooperative Organization ; International S&T cooperation program of Shanghai Cooperative Organization ; International S&T cooperation program of Shanghai Cooperative Organization ; International S&T cooperation program of Shanghai Cooperative Organization ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; International Partnership Program of International Cooperation Bureau, Chinese Academy of Sciences ; International Partnership Program of International Cooperation Bureau, Chinese Academy of Sciences ; International Partnership Program of International Cooperation Bureau, Chinese Academy of Sciences ; International Partnership Program of International Cooperation Bureau, Chinese Academy of Sciences ; International S&T cooperation program of Shanghai Cooperative Organization ; International S&T cooperation program of Shanghai Cooperative Organization ; International S&T cooperation program of Shanghai Cooperative Organization ; International S&T cooperation program of Shanghai Cooperative Organization ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; International Partnership Program of International Cooperation Bureau, Chinese Academy of Sciences ; International Partnership Program of International Cooperation Bureau, Chinese Academy of Sciences ; International Partnership Program of International Cooperation Bureau, Chinese Academy of Sciences ; International Partnership Program of International Cooperation Bureau, Chinese Academy of Sciences ; International S&T cooperation program of Shanghai Cooperative Organization ; International S&T cooperation program of Shanghai Cooperative Organization ; International S&T cooperation program of Shanghai Cooperative Organization ; International S&T cooperation program of Shanghai Cooperative Organization ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/110633]  
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Shen, Ping
作者单位1.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
2.North China Univ Sci & Technol, Coll Min Engn, Tangshan 063210, Hebei, Peoples R China
3.Changan Univ, Sch Earth Sci & Resources, Xian 710054, Shaanxi, Peoples R China
4.Chinese Acad Sci, Inst Geol & Geophys, CAS Key Lab Mineral Resources, Beijing 100029, Peoples R China
5.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Bai, Yingxiong,Shen, Ping,Cao, Chong,et al. In-situ elemental and boron isotopic variations of tourmaline from the Koktokay pegmatitic rare-metal deposit, China: Insights into external contamination and the source of the granitic pegmatite[J]. ORE GEOLOGY REVIEWS,2023,162:21.
APA Bai, Yingxiong.,Shen, Ping.,Cao, Chong.,Li, Changhao.,Feng, Haoxuan.,...&Suo, Qingyu.(2023).In-situ elemental and boron isotopic variations of tourmaline from the Koktokay pegmatitic rare-metal deposit, China: Insights into external contamination and the source of the granitic pegmatite.ORE GEOLOGY REVIEWS,162,21.
MLA Bai, Yingxiong,et al."In-situ elemental and boron isotopic variations of tourmaline from the Koktokay pegmatitic rare-metal deposit, China: Insights into external contamination and the source of the granitic pegmatite".ORE GEOLOGY REVIEWS 162(2023):21.

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来源：地质与地球物理研究所

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