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  4. 中国科学院矿物学与成矿学重点实验室
Garnet as a carrier of HREEs in highly fractionated peraluminous granite: Implications for the formation of ion-absorption HREE deposits

文献类型：期刊论文

作者Yang, Yu-Yuan2,3; Li, Ning-Bo2,5; Wang, Jun1; Zhao, Xu4; Qu, Pan2,5; Li, Ao2,5; Niu, He-Cai2,5
刊名ORE GEOLOGY REVIEWS
出版日期2024-10-01
卷号173页码:15
关键词Garnet Highly fractionated peraluminous granites Primary HREE enrichment Ion-absorption HREE deposits South China
ISSN号0169-1368
DOI10.1016/j.oregeorev.2024.106245
英文摘要Ion-absorption rare earth element (REE) deposits in South China are the world's most important source of heavy REEs (HREEs). These deposits were formed by the weathering of granitic rocks whose formation involved primary HREE enrichment. Previous studies have identified the key role of late-stage magmatic evolution, especially the magmatic-hydrothermal transition stage played in HREE enrichment, but the detailed processes need further investigation. Garnet is a common HREE carrier in parent rocks and also a main contributor of these elements in formation of ion-absorption HREE deposits. Here, we investigate textural and compositional variations in garnets from parent rock (muscovite granite) of the Dabu ion-absorption HREE deposit to constrain the primary HREE enrichment of the parent rock during late-stage magmatic evolution. Mass-balance calculations reveal that garnet accounts for similar to 67 % of the Y and 64 % of the REEs in the Dabu muscovite granite. The garnets can be classified into three types: i) magmatic garnets (Grt-1A) are intergrown with plagioclase, K-feldspar, and quartz, host both melt and mineral inclusions, and have high REE + Y contents (6488-19,215 ppm); ii) magmatic-hydrothermal garnets (Grt-1B) occur as overgrowths on Grt-1A, host both melt and fluid inclusions, and have intermediate REE + Y contents (2681-8683 ppm); and iii) hydrothermal garnets (Grt-2) are intergranular with quartz and altered biotite, host primary fluid inclusions, and have the lowest REE + Y contents (476-1247 ppm). The texture and composition of the three types of garnet indicate that the magma have undergone a transition from a volatile-undersaturated to a volatile-oversaturated aqueous system. The fluid, from which some REE minerals precipitated, present in the magma system was derived from the magma itself rather than from an external source, as evidenced by the similarity in Nd isotopic composition between the REE minerals and the whole-rock samples. During this transition, the presence of high-HREE garnet prevents the HREE partitioning into refractory minerals (e.g., zircon, REE-bearing phosphate) or extracting from the magma system by the fluid. Our findings show that granites containing high-HREE garnet have high potential for forming ion-absorption HREE deposits and that garnet can reliably record their magmatic evolution.
WOS研究方向Geology ; Mineralogy ; Mining & Mineral Processing
语种英语
WOS记录号WOS:001319101800001
源URL[http://ir.gig.ac.cn/handle/344008/81164]  
专题中国科学院矿物学与成矿学重点实验室
通讯作者Li, Ning-Bo
作者单位1.Geol Bur Nonferrous Met Guangdong Prov, Guangzhou 510080, Peoples R China
2.Chinese Acad Sci, Guangzhou Inst Geochem, Key Lab Mineral & Metallogeny, Guangdong Prov Key Lab Mineral Phys & Mat, Guangzhou 510640, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100046, Peoples R China
4.Yunnan Univ, Sch Earth Sci, Kunming 650500, Peoples R China
5.CAS Ctr Excellence Deep Earth Sci, Guangzhou 510640, Peoples R China
推荐引用方式
GB/T 7714		 Yang, Yu-Yuan,Li, Ning-Bo,Wang, Jun,et al. Garnet as a carrier of HREEs in highly fractionated peraluminous granite: Implications for the formation of ion-absorption HREE deposits[J]. ORE GEOLOGY REVIEWS,2024,173:15.
APA Yang, Yu-Yuan.,Li, Ning-Bo.,Wang, Jun.,Zhao, Xu.,Qu, Pan.,...&Niu, He-Cai.(2024).Garnet as a carrier of HREEs in highly fractionated peraluminous granite: Implications for the formation of ion-absorption HREE deposits.ORE GEOLOGY REVIEWS,173,15.
MLA Yang, Yu-Yuan,et al."Garnet as a carrier of HREEs in highly fractionated peraluminous granite: Implications for the formation of ion-absorption HREE deposits".ORE GEOLOGY REVIEWS 173(2024):15.

入库方式： OAI收割

来源：广州地球化学研究所

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