Apatite geochronology and geochemistry of Gucheng granites: Implications for petrogenesis and REE metallogenesis in South China
文献类型：期刊论文
| 作者 | Feng, Yuzhou1,2; Lu, Wanjian3,4; Xiao, Bing2; Wu, Chao2; Zheng, Hui2 |
| 刊名 | ORE GEOLOGY REVIEWS
 |
| 出版日期 | 2023-12-01 |
| 卷号 | 163页码:8 |
| 关键词 | Apatite Geochronology Geochemistry Regolith-hosted REE deposits South China |
| ISSN号 | 0169-1368 |
| DOI | 10.1016/j.oregeorev.2023.105791 |
| 英文摘要 | Regolith-hosted rare earth element (REE) deposits are common in South China, and occurred dominantly in regolith of granite. The Gucheng deposit in western Guangdong Province is one example of HREE-dominated hosted in weathered coarse-grained biotite granites (CGBG). We conducted petrographic observations, in-situ U-Pb dating, EPMA, and LA-ICP-MS in situ compositions analyses on apatite grains from the CGBG to gain in-sights into the petrogenesis of CGBG and implications for REE mineralization at Gucheng. U-Pb geochronology of 50 apatite grains yields 206Pb/238U age of 102.1 +/- 3.1 Ma, representing the crystallization age of CGBG, which suggests the CGBG was formed in the late Early Cretaceous.LA-ICP-MS data show that the CGBG apatite is characterized by enrichment of LREE ((La/Yb)N = 6.3 to 11.4) and obvious Eu anomalies (delta Eu = 0.12 to 0.16), indicating crust-mantle mixing in the magma source. Meanwhile, the mantle source was indicated to be metasomatized by both sediment melting and slab melting components triggered by the subducted Paleo-Pacific slab. In conjunction with LREE enrichment, no Eu anomaly and ratios (e.g., (Sm/Nd)N, (La/Sm)N, (La/Yb)N and Sr/Y) in apatite, the CGBG is classified as I-type granite. Meanwhile, although apatite is low in the CGBG (0.6 mod. %), it is an important REE-carrier mineral in the CGBG (5194 to 6255 ppm) and contains 30.5 times higher REE concentrations than those of the CGBG. Moreover, it contribute 19.5 % of REE concentrations for total REE of the CGBG, and its decomposition during weathering has a great contribution for REE mineralization in regolith. However, the decomposition of apatite and release of REE cannot account for the HREE-dominated mineralization in regolith of CGBG that are characterized by enrichment of LREE. |
| WOS研究方向 | Geology ; Mineralogy ; Mining & Mineral Processing |
| 语种 | 英语 |
| WOS记录号 | WOS:001123973100001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/75979]  |
| 专题 | 中国科学院广州地球化学研究所 |
| 通讯作者 | Lu, Wanjian |
| 作者单位 | 1.Univ Saskatchewan, Dept Geol Sci, Saskatoon, SK S7N 5E2, Canada 2.Chinese Acad Sci, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China 3.Guangdong Univ Finance & Econ, Sch Publ Adm, 21 Luntou Rd, Guangzhou 510320, Peoples R China 4.Guangdong Univ Finance & Econ, Lingnan Tourism Res Acad, Guangzhou 510320, Peoples R China |
| 推荐引用方式 GB/T 7714 | Feng, Yuzhou,Lu, Wanjian,Xiao, Bing,et al. Apatite geochronology and geochemistry of Gucheng granites: Implications for petrogenesis and REE metallogenesis in South China[J]. ORE GEOLOGY REVIEWS,2023,163:8. |
| APA | Feng, Yuzhou,Lu, Wanjian,Xiao, Bing,Wu, Chao,&Zheng, Hui.(2023).Apatite geochronology and geochemistry of Gucheng granites: Implications for petrogenesis and REE metallogenesis in South China.ORE GEOLOGY REVIEWS,163,8. |
| MLA | Feng, Yuzhou,et al."Apatite geochronology and geochemistry of Gucheng granites: Implications for petrogenesis and REE metallogenesis in South China".ORE GEOLOGY REVIEWS 163(2023):8. |
入库方式： OAI收割
来源：广州地球化学研究所
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