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REE Enrichment during Magmatic–Hydrothermal Processes in Carbonatite-Related REE Deposits: A Case Study of the Weishan REE Deposit, China
| Content Provider | Directory of Open Access Journals (DOAJ) |
|---|---|
| Author | Yan Liu Yu-heng Jia |
| Abstract | The Weishan carbonatite-related rare earth element (REE) deposit in China contains both high- and low-grade REE mineralization and is an informative case study for the investigation of magmatic−hydrothermal REE enrichment processes in such deposits. The main REE-bearing mineral is bastnäsite, with lesser parisite and monazite. REE mineralization occurred at a late stage of hydrothermal evolution and was followed by a sulfide stage. Barite, calcite, and strontianite appear homogeneous in back-scattered electron images and have high REE contents of 103−217, 146−13,120, and 194−16,412 ppm in their mineral lattices, respectively. Two enrichment processes were necessary for the formation of the Weishan deposit: Production of mineralized carbonatite and subsequent enrichment by magmatic−hydrothermal processes. The geological setting and petrographic characteristics of the Weishan deposit indicate that two main factors facilitated REE enrichment: (1) fractures that facilitated circulation of ore-forming fluids and provided space for REE precipitation and (2) high ore fluorite and barite contents resulting in high $F^{−}$ and SO_{4}$^{2−}$ concentrations in the ore-forming fluids that promoted REE transport and deposition. |
| Related Links | https://www.mdpi.com/2075-163X/10/1/25 |
| e-ISSN | 2075163X |
| DOI | 10.3390/min10010025 |
| Journal | Minerals |
| Issue Number | 1 |
| Volume Number | 10 |
| Language | English |
| Publisher | MDPI AG |
| Publisher Date | 2019-01-01 |
| Publisher Place | Switzerland |
| Access Restriction | Open |
| Subject Keyword | Mineralogy Mineralogical Characteristics Disseminated Ree Ores Carbonatite–syenite Complex Weishan Deposit Shandong Province |
| Content Type | Text |
| Resource Type | Article |
