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Origin and mineralization processes of REE during magmatic-hydrothermal evolution: Insights from in-situ geochemistry of calcite from the Weishan REE deposit, eastern North China Craton

文献类型：期刊论文

作者Zhao, Lang-Ye3,4; Lan, Ting-Guang2,3,4; Fan, Hong-Rui5; Lan, Jun6; Wang, Hong3; Chen, Wei Terry3,4; Hu, Huan-Long3; Li, De-Jian1
刊名ORE GEOLOGY REVIEWS
出版日期2023-11-01
卷号162页码:16
ISSN号0169-1368
关键词LA-ICP-MS Calcite Magmatic-hydrothermal evolution REE mineralization Weishan REE deposit
DOI10.1016/j.oregeorev.2023.105676
英文摘要The Weishan REE deposit, hosting more than one million tons of light REE oxides (LREE2O3), is one of the largest LREE deposits in China. It has been considered to be a carbonatite-related REE deposit, but whether carbonatites occurred or not is still controversial, leading to the confusions of how the LREE originated and mineralized. Here, we conducted in-situ elemental and Sr-Nd isotopic analyses on different stages of calcite from the Weishan REE deposit, combined with petrographic and bulk C-O isotopic studies, with the aim to unravel the origin and mineralization processes of REE. Four stages of calcite (Cal-1, Cal-2, Cal-3 and Cal-4) were identified, of which the Cal-1 typically coexists with K-feldspar and quartz while the Cal-2 and Cal-3 coexist with sulfates and REE minerals (e.g., bastna center dot site and parisite), respectively. The Cal-4 occurs in the post-ore veinlets and coexists with sulfides. The Cal-1 is characterized by exsolution of carbocernaite along its cleavage planes with highest Na, K, Sr, Ba and LREE contents. The other stages of calcite show continuous decrease of the above elements. Combined with petrographic features and elemental discrimination diagrams, it is concluded that the Cal-1 is magmatic while the others are hydrothermal. These calcites thus indicate a continuous magmatic-hydrothermal evolution. The four stages of calcite show similar isotopic compositions, which are consistent with those of the alkaline silicate rocks in the ore district, suggesting an uniform source or magma chamber for their derivation. Considering the magmatic features of Cal-1, it is inferred that carbonate melts coupled with abundant alkaline fluids were exsolved from the alkaline magmas. Alkalis (e. g., K and Na) were enriched in the magmatic-hydrothermal system with potassic metasomatism being more prevalent, which might play an important role in REE exsolution and transportation. Focused REE deposition occurred shortly after massive deposition of sulfates, indicating that REE-sulfate complexes might be the dominant transporting ligands of REE. The deposition of REE was mainly induced by fluid boiling, as indicated by the boiling/unmixing features of fluid inclusions. The Sr-Nd isotopic compositions of ores and associated alkaline rocks show affinities to the enriched lithospheric mantle (EM) beneath the study region, but are more depleted. Because subduction of the Paleo-Pacific oceanic plate beneath the eastern Asian occurred since the Jurassic, it is inferred that CO2- and REE-rich melts/fluids released from the subducted oceanic slab metasomatized the EM, leading to a REE-rich carbonated mantle. Rollback of the subducted slab occurred during the early Cretaceous, resulting in partial melting of the EM and thus generating the CO2- and REE-rich alkaline magmas. This deposit shows significant hydrothermal features with poorly-developed carbonatites, distinct from the typical carbonatite-related REE deposits in the other places. The REE mineralization is thus considered to be basically controlled by the alkaline magmas rather than the carbonatites.
WOS关键词RARE-EARTH-ELEMENTS ; TRACE-ELEMENT ; SHANDONG PROVINCE ; BAYAN-OBO ; CARBONATITE ; DESTRUCTION ; SR ; ALKALINE ; COMPLEX ; DIFFERENTIATION
资助项目National Natural Science Foundation of China[41930430] ; National Natural Science Foundation of China[42103069] ; West Light Foundation of Chi-nese Academy of Sciences
WOS研究方向Geology ; Mineralogy ; Mining & Mineral Processing
语种英语
出版者ELSEVIER
WOS记录号WOS:001106551200001
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; West Light Foundation of Chi-nese Academy of Sciences ; West Light Foundation of Chi-nese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; West Light Foundation of Chi-nese Academy of Sciences ; West Light Foundation of Chi-nese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; West Light Foundation of Chi-nese Academy of Sciences ; West Light Foundation of Chi-nese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; West Light Foundation of Chi-nese Academy of Sciences ; West Light Foundation of Chi-nese Academy of Sciences
源URL[http://ir.iggcas.ac.cn/handle/132A11/111159]  
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Lan, Ting-Guang
作者单位1.Shandong Weishan REE Co Ltd, Weishan 277600, Peoples R China
2.Chinese Acad Sci, Inst Geochem, 99 Linchengxi Rd, Guiyang 550081, Guizhou, Peoples R China
3.Chinese Acad Sci, State Key Lab Ore Deposit Geochem, Inst Geochem, Guiyang 550081, Peoples R China
4.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China
5.Chinese Acad Sci, Key Lab Mineral Resources, Inst Geol & Geophys, Beijing 100029, Peoples R China
6.Shandong Prov Bur Geol & Mineral Resources, Geol Brigade 5, Tai An 271000, Peoples R China
推荐引用方式
GB/T 7714		 Zhao, Lang-Ye,Lan, Ting-Guang,Fan, Hong-Rui,et al. Origin and mineralization processes of REE during magmatic-hydrothermal evolution: Insights from in-situ geochemistry of calcite from the Weishan REE deposit, eastern North China Craton[J]. ORE GEOLOGY REVIEWS,2023,162:16.
APA Zhao, Lang-Ye.,Lan, Ting-Guang.,Fan, Hong-Rui.,Lan, Jun.,Wang, Hong.,...&Li, De-Jian.(2023).Origin and mineralization processes of REE during magmatic-hydrothermal evolution: Insights from in-situ geochemistry of calcite from the Weishan REE deposit, eastern North China Craton.ORE GEOLOGY REVIEWS,162,16.
MLA Zhao, Lang-Ye,et al."Origin and mineralization processes of REE during magmatic-hydrothermal evolution: Insights from in-situ geochemistry of calcite from the Weishan REE deposit, eastern North China Craton".ORE GEOLOGY REVIEWS 162(2023):16.

入库方式： OAI收割

来源：地质与地球物理研究所

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