Lithium, Phosphorus, and rare earth elements in magmatic garnets from granitic Pegmatites: Coupled substitution and petrogenetic implications
文献类型：期刊论文
| 作者 | Feng, Yonggang1,2; Cen, Jubiao2; Liang, Ting2; Wang, Mengxi2; Tan, Xijuan1,2; Hao, Yuanyuan2; Yan, Shanshan2,3 |
| 刊名 | ORE GEOLOGY REVIEWS
 |
| 出版日期 | 2023-02-01 |
| 卷号 | 153页码:22 |
| 关键词 | Garnet Granitic pegmatite Trace element Zoning Substitution Petrogenesis |
| ISSN号 | 0169-1368 |
| DOI | 10.1016/j.oregeorev.2022.105284 |
| 英文摘要 | The general chemical formula of garnet can be expressed as X3Y2(ZO4)3 where X, Y, and Z represent dodeca-hedral, octahedral, and tetrahedral sites, respectively. Lithium, phosphorus, and rare earth elements (including yttrium) in garnets from the Luanzhuang-Guanpo and Ziyugou (ZYG) pegmatite fields in the East Qinling orogen and the Kalu'an (KLA) Li pegmatites in the Chinese Altay orogen have been investigated both at a mineral scale and in the context of pegmatite types to identify the substitution mechanisms for these elements. Our results show that Y + REE or P can enter the garnet lattice through coupled substitution with Li (+Na) that can compensate the charge differences due to Y + REE in the X-site or P in the Z-site of the garnet. Two substitutions, namely [X(Li,Na)+ X(Y,REE)3+ XR2+ 1 1 (R2+)-2] and [X(Li,Na)1 ZP1 Z Si-1], are likely the most important and can account for-1 incorporation of the majority of Y + REE, P, and Li + Na in pegmatite garnets. Whichever substitution becomes predominant in garnets is strongly dependent on the bulk chemistry of pegmatite-forming melts. Consequently, the first substitution dominates in garnets from NYF (niobium-yttrium-fluorine) pegmatites and mixed-type pegmatites with NYF affinity whereas the other one dominates in garnets from relatively P-rich LCT (lithium -cesium-tantalum) and barren pegmatites. Incorporation of Sc and Ti in garnet may also need Li + Na, although Sc and Ti are not as much as Y and REE in pegmatite garnet. The zonings of Y, REE, and Sc in garnet are mainly controlled by the composition of pegmatite-forming melt and consumption of these elements due to the growth of garnet itself and other minerals enriched in Y + REE (e.g., xenotime, fergusonite, monazite, etc.) or Sc (e.g., biotite). Additionally, our results, combined with the data in the literature, show that garnets from NYF peg-matites and mixed-type pegmatites with NYF affinity commonly contain elevated Y (up to -20000 ppm), REE (up to -20000 ppm), and Sc (up to -2400 ppm) but low P (<100 ppm) compared to those from LCT and barren pegmatites. Nevertheless, individual garnets with low concentrations of Y, REE, Sc, and P can occur in any types of pegmatites. Therefore, the coupled substitution between Li + Na and Y + REE or P along with zonings and concentrations of Y, REE, and Sc in garnet should be investigated on a regular basis to interpret pegmatite petrogenesis. |
| WOS研究方向 | Geology ; Mineralogy ; Mining & Mineral Processing |
| 语种 | 英语 |
| WOS记录号 | WOS:000918048600001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/72472]  |
| 专题 | 中国科学院广州地球化学研究所 |
| 通讯作者 | Feng, Yonggang |
| 作者单位 | 1.Changan Univ, Xian Key Lab Mineralizat & Efficient Utilizat Crit, Xian 710054, Peoples R China 2.Changan Univ, Sch Earth Sci & Resources, Xian 710054, Peoples R China 3.Chinese Acad Sci, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China |
| 推荐引用方式 GB/T 7714 | Feng, Yonggang,Cen, Jubiao,Liang, Ting,et al. Lithium, Phosphorus, and rare earth elements in magmatic garnets from granitic Pegmatites: Coupled substitution and petrogenetic implications[J]. ORE GEOLOGY REVIEWS,2023,153:22. |
| APA | Feng, Yonggang.,Cen, Jubiao.,Liang, Ting.,Wang, Mengxi.,Tan, Xijuan.,...&Yan, Shanshan.(2023).Lithium, Phosphorus, and rare earth elements in magmatic garnets from granitic Pegmatites: Coupled substitution and petrogenetic implications.ORE GEOLOGY REVIEWS,153,22. |
| MLA | Feng, Yonggang,et al."Lithium, Phosphorus, and rare earth elements in magmatic garnets from granitic Pegmatites: Coupled substitution and petrogenetic implications".ORE GEOLOGY REVIEWS 153(2023):22. |
入库方式： OAI收割
来源：广州地球化学研究所
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