Next Article in Journal
Crystallographic and Seismic Anisotropies of Calcite at Different Depths: A Study Using Quantitative Texture Analysis by Neutron Diffraction
Next Article in Special Issue
The Petyayan-Vara Carbonatite-Hosted Rare Earth Deposit (Vuoriyarvi, NW Russia): Mineralogy and Geochemistry
Previous Article in Journal
Recovery of Microcrystalline Graphite from Quartz Using Magnetic Seeding
Previous Article in Special Issue
Minerals of Rare Earth Elements in High-Phosphorus Ooidal Ironstones of the Western Siberia and Turgai Depression
Open AccessArticle

REE Enrichment during Magmatic–Hydrothermal Processes in Carbonatite-Related REE Deposits: A Case Study of the Weishan REE Deposit, China

by Yu-heng Jia 1,2 and Yan Liu 2,3,*
1
Earth Science Institute, Guilin University of Technology, Guilin 541004, China
2
Key Laboratory of Deep-Earth Dynamics of Ministry of Natural Resources, Institute of Geology, Chinese Academy of Geological Science, Beijing 100037, China
3
Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511458, China
*
Author to whom correspondence should be addressed.
Minerals 2020, 10(1), 25; https://doi.org/10.3390/min10010025
Received: 22 August 2019 / Revised: 4 December 2019 / Accepted: 20 December 2019 / Published: 27 December 2019
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 SO42− concentrations in the ore-forming fluids that promoted REE transport and deposition. View Full-Text
Keywords: mineralogical characteristics; disseminated REE ores; carbonatite–syenite complex; Weishan deposit; Shandong Province mineralogical characteristics; disseminated REE ores; carbonatite–syenite complex; Weishan deposit; Shandong Province
Show Figures

Graphical abstract

MDPI and ACS Style

Jia, Y.-H.; Liu, Y. REE Enrichment during Magmatic–Hydrothermal Processes in Carbonatite-Related REE Deposits: A Case Study of the Weishan REE Deposit, China. Minerals 2020, 10, 25.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop