Article
Geology
Shang Liu, Hong-Rui Fan, Qi-Wei Wang, Yan-Jiang Liu, Wei Wei
Summary: This study classified fluorocarbonates and monazites into three generations based on their REE distribution patterns and origins. The different generations of REE minerals provide indicators for the mineralization processes in carbonatite-related REE deposits. The findings contribute to understanding the mineralization processes of the Bayan Obo deposit.
ORE GEOLOGY REVIEWS
(2023)
Article
Geochemistry & Geophysics
Caitlin M. J. Beland, Anthony E. Williams-Jones
Summary: The growing demand for rare earth elements, particularly heavy REEs, has led to increased exploration and research on carbonatite-hosted deposits. The Ashram REE deposit is rich in heavy REEs and was formed through a combination of magmatic processes and hydrothermal mobilization. The REE minerals in the deposit were precipitated from hydrothermal fluids, with monazite(Ce) and bastna center dot site-(Ce) being the main minerals present.
Article
Geology
Qiang Weng, Wu-Bin Yang, He-Cai Niu, Ning-Bo Li, Qiang Shan, Guo-Qiang Fan, Zhao-Yong Jiang
Summary: This study investigated the Lizhuang rare earth element deposit in southwestern China, revealing the presence of sodic fenitization in the syenite system, impacting REE mineralization. In situ U-Pb dating indicated that hydrothermal alteration processes occurred concurrently with the emplacement of syenite and carbonatite over a period of approximately 2 million years.
ORE GEOLOGY REVIEWS
(2021)
Article
Geology
Long -Gang Gao, Rui-Zhong Hu, You -Wei Chen, Xian-Wu Bi, Jian-Feng Gao, Shao-Hua Dong, Jin-Cheng Luo
Summary: The genesis and enrichment process of middle and heavy rare earth elements in the Huayangchuan deposit were investigated through the analysis of monazite element and isotopic composition. The deposit is associated with HREE-rich calcite carbonatites, with mineralization occurring in two stages. The ages of the mineralization were determined to be 206-207 Ma, with younger ages attributed to reworking from later tectono-thermal events. The deposit is related to enriched mantle-derived calcite carbonatite, but locally affected by late fluid activation.
ORE GEOLOGY REVIEWS
(2023)
Article
Geology
Ao Li, Wu-Bin Yang, He-Cai Niu, Qiang Shan, Chun Jia
Summary: The study investigated the carbonate mineral assemblage in the Gansha Obo REE deposit in northwestern China, revealing bastna center dot site as the primary ore mineral and parisite and synchysite as secondary minerals. U-Pb dating of bastna center dot site and synchysite provided ages indicating the timing of REE mineralization and a later tectono-thermal event. The results highlight the significance of REE carbonate U-Pb dating in understanding REE mineral precipitation and identifying regional tectono-thermal events.
ORE GEOLOGY REVIEWS
(2021)
Article
Geology
Qiang Weng, Wu-Bin Yang, He-Cai Niu, Ning-Bo Li, Qiang Shan
Summary: In this study, the mineral chemistry and sulfur isotopes of sulfides and sulfates from carbonatite in the Maoniuping REE deposit, China were analyzed to understand the ore-forming processes. The sulfur isotopes showed variations controlled by temperature and oxidation state, and SO2 degassing and high SO42- activity were identified as important factors in REE mineralization.
ORE GEOLOGY REVIEWS
(2023)
Article
Geochemistry & Geophysics
Wei Zhang, Wei Terry Chen, Terrence Patrick Mernagh, Li Zhou
Summary: By studying the fluid inclusions in the Dalucao carbonatite-related REE deposit, it was found that the unique ore-forming fluids with high concentrations of sulfate play a key role in REE mineralization.
MINERALIUM DEPOSITA
(2022)
Article
Geology
Yue Sun, Hao Hu, Xuan-Dac Ngo, Jindrich Kynicky, Tao Luo, Xiao-Dong Deng, Jian-Wei Li
Summary: Carbonatite-related rare-earth element (REE) deposits are developed in large areas of southwestern China and northwestern Vietnam. This study presents new Th-Pb dating results for the Nam Xe REE deposit in northwestern Vietnam and reveals its possible relationship to the well-studied REE deposits in southwestern China.
ORE GEOLOGY REVIEWS
(2023)
Article
Geochemistry & Geophysics
Nigel J. Cook, Cristiana L. Ciobanu, Benjamin P. Wade, Sarah E. Gilbert, Robert Alford
Summary: The Mount Weld rare earth element (REE) deposit in Western Australia is one of the largest known deposits on Earth. The mineralogy, petrography, and distribution of lanthanides in different components of the deposit were studied using microanalysis techniques. The results showed that the REEs in the deposit are present in fine-grained phases and are often encapsulated in nano-scale inclusions.
Article
Geology
Qiang Weng, He-Cai Niu, Pan Qu, Qiang Shan, Ning-Bo Li, Wu-Bin Yang
Summary: By analyzing the compositions of mica in the Maoniuping rare earth elements (REE) deposit, researchers have been able to reveal the petrogenesis and REE mineralization processes of the Maoniuping syenite-carbonatite complex. The study shows that common phlogopite is crystallized from the parent magma system, while tetraferriphlogopite precipitates in the REE-enriched hydrothermal fluids. The variations in mica composition and chemical compositions support the processes of liquid immiscibility and separated magmatic-hydrothermal evolution in the formation of the giant Maoniuping REE deposit.
ORE GEOLOGY REVIEWS
(2022)
Article
Geochemistry & Geophysics
Ali Abedini, Maryam Khosravi
Summary: The Huri bauxite deposit in northwestern Iran is found within carbonate footwalls of the Ruteh Formation. The bauxite ores consist of various minerals including hematite, diaspore, kaolinite, and traces of other minerals. Geochemical studies suggest that basalt rocks interbedded in limestone are the potential precursor rocks of the deposit, and various factors such as fluctuating groundwater table level and pH variations contributed to the mineral fractionation and anomalies.
Article
Geochemistry & Geophysics
Caitlin M. J. Beland, Anthony E. Williams-Jones
Summary: Carbonatites are inherently enriched in light rare earth elements (LREEs), but not all can form economic deposits due to insufficient enrichment. In the Ashram carbonatite-hosted REE deposit in Canada, hydrothermal fluids mobilize and concentrate all REEs to varying degrees in REE minerals, with lighter REEs more strongly concentrated than heavier ones. The relative thermo-dynamic stability of aqueous REE-complexes and minerals play a crucial role in this concentration process.
Article
Geology
Qu YunWei, Xie YuLing, Yin ShuPing, Yu Chao, Xia JiaMing, Cui Kai
Summary: The Sr-rich carbonatites reported in Mianning County, Sichuan Province have unique microcrystalline to porphyritic textures and a rich mineral assemblage, indicating a special origin related to shallow emplacement and magmatic evolution. The presence of quartz phenocrysts and high-quality ore minerals suggests a significant potential in mineral resources for this type of carbonatite.
ACTA PETROLOGICA SINICA
(2021)
Article
Geochemistry & Geophysics
Xu Zheng, Yan Liu, Liangsheng Zhang
Summary: Geological investigations and fluid inclusion studies indicate that the ore fluids in the Mianning-Dechang REE belt were derived from a late-stage alkaline-carbonatitic magma, with decreasing temperatures and salinities leading to REE deposition.
Article
Geosciences, Multidisciplinary
Sudipa Bhunia, N. V. Chalapathi Rao, B. Belyatsky, D. Talukdar, Rohit Pandey, B. Lehmann
Summary: The carbonatite plug at Kamthai is India's only known carbonatite-hosted rare-earth-element deposit, dating back to the Late Cretaceous period. The study reveals the association of the carbonatite intrusion with the Reunion hotspot in the Indian sub-continent, which has significant geological implications.
