Article
Geology
Xu Zhao, Ning-Bo Li, Jan Marten Huizenga, Shuang Yan, Yu-Yuan Yang, He-Cai Niu
Summary: Ion-adsorption type rare earth element mineralization was discovered in the weathered profiles of three Mesozoic granites in the Bachi area of Guangdong Province, South China. Geochemical and geochronological data revealed that the Early Jurassic and Cretaceous granites have similar characteristics, while the Late Jurassic granite has higher CaO, Fe2O3, and MgO contents. The Late Jurassic granite also has more enriched isotopic compositions and a greater presence of inherited/captured zircon cores.
ORE GEOLOGY REVIEWS
(2021)
Article
Metallurgy & Metallurgical Engineering
Sabrina Hedrich, Anja Breuker, Mirko Martin, Axel Schippers
Summary: Sands from the German Baltic Sea coast are recovered as construction material and contain heavy minerals enriched with zircon, garnet, ilmenite, rutile, magnetite, and monazite. Gravity and magnetic separation can be used to concentrate the heavy minerals. Bioleaching experiments were conducted on zircon concentrates and eudialyte concentrates containing rare earth elements (REE), but the results showed limitations in the extraction of REEs from heavy minerals through bioleaching.
Article
Geochemistry & Geophysics
Liangxin Gong, Xianguang Wang, Defu Zhang, Wen Zhong, Mingxuan Cao
Summary: The study reveals the enrichment mechanism of HREE in the Shitouping pluton in southern China. By studying the structure and composition of zircon, the researchers found that the increase in HREE content in zircon is due to the exsolution of HREE-rich fluids during the late stage of magma evolution. This study is important for understanding the formation mechanism of HREE deposits in the Shitouping pluton.
Article
Engineering, Chemical
Shan Wu, Chao Bie, Hao Su, Yun Gao, Xiaoqi Sun
Summary: Two novel salicylic acid derivatives, OOBA and EHOBA, were synthesized for the extraction and separation of Y from ion adsorbed rare earth ores. The study found that OOBA exhibits similar extraction behavior to LREEs and has better selectivities for Y and other HREEs compared to common carboxylic acids. The extraction mechanism of OOBA was determined to be cation exchange. Furthermore, OOBA demonstrated advantages such as low stripping acid concentration, good cycle stability, and minimal loss in the extraction process. A simulated fractional extraction process was developed to separate Y from the Y-enriched HREEs feed liquid, resulting in a Y product with high purity and yield.
MINERALS ENGINEERING
(2022)
Article
Metallurgy & Metallurgical Engineering
Binyuan Gao, Min Gan, Chongran Sun, Hui Chen, Xi Liu, Qianzi Liu, Yuguang Wang, Haina Cheng, Hongbo Zhou, Zhu Chen
Summary: A cell-free cascade enzymatic process was developed to produce gluconate from low-cost rice straw as an alternative to ammonium sulfate for leaching ion-adsorption rare earth ores. Compared to fermentation, the enzymatic process showed higher yield and superior leaching efficiency. This study provides a new avenue for potentially economical production of biogenic lixiviants from renewable and cheap feedstocks.
Article
Metallurgy & Metallurgical Engineering
Kang-shi Guo, Yan-feng Zhuang
Summary: This study presents a reactive transport model for the in-situ recovery of weathered crust elution-deposited rare earth ores and validates the model through various experiments. The results show that using a single selection coefficient for modeling is acceptable and that Darcy velocity and leaching solution concentration have significant effects on the leaching process. Optimal cessation of leaching solution injection can conserve solution and reduce pollution. The differences in parameters derived from different experiments highlight the need for further investigation.
Review
Polymer Science
Gabriel Salfate, Julio Sanchez
Summary: The demand for rare earth elements (REEs) has been increased by contemporary industrial processes and the application of new technologies. However, the increased mining of REEs has led to a supply crisis. Researchers have recently started considering the viability of recovering REEs from secondary sources such as mining wastewaters and acid mine drainage. In order to find more sustainable processes, the performance of various adsorption/ion exchange materials in capturing REEs from water sources is being evaluated.
Article
Engineering, Environmental
Katarzyna Burdzy, Andreas Aurich, Steffi Hunger, Renata Jastrazab, Michal Zabiszak, Dorota Kolodynska
Summary: In this study, the effects of citric acid as a biodegradable complexing agent on the sorption process of La(III), Nd(III), and Ho(III) ions were investigated. The adsorption capacity was analyzed by considering factors such as pH, molar ratio, contact time, initial concentrations, and temperature. The results showed that the Purolite S957 chelating ion exchanger had the highest adsorption capacity. The study also evaluated the reusability of ion exchangers and simulated the behavior of fixed bed columns using dynamic experiments.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Biotechnology & Applied Microbiology
Michael Paper, Max Koch, Patrick Jung, Michael Lakatos, Tom Nilges, Thomas B. Brueck
Summary: This study investigated the potential of 12 cyanobacterial strains for biosorption of rare earth elements, and Nostoc sp. 20.02 showed the highest adsorption capacity. Synechococcus elongatus UTEX 2973, Calothrix brevissima SAG 34.79, Desmonostoc muscorum 90.03, and Komarekiella sp. 89.12 were also promising strains. The adsorption of metals by the strains had fast kinetics and pH value had a significant impact on the process.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2023)
Article
Chemistry, Physical
Xu Feng, Oznur Onel, Mcalister Council-Troche, Aaron Noble, Roe-Hoan Yoon, John R. Morris
Summary: Synthesized rare earth ion-adsorption clays prepared from kaolinite at basic pH exhibit high rare earth ion-exchange efficiency, with the adsorption of REEs on kaolinite surface concentration being pH dependent.
APPLIED CLAY SCIENCE
(2021)
Article
Geochemistry & Geophysics
Heng Wang, Hongping He, Wubin Yang, Zhiwei Bao, Xiaoliang Liang, Jianxi Zhu, Lingya Ma, Yufeng Huang
Summary: More than 90% of the global heavy rare earth elements (HREE) supply is currently from the ion-adsorption REE deposits in South China. This study explores the mechanisms of HREE enrichment in the granite bedrock of REE mineralized weathering crusts using zircon texture and composition as a proxy. The results show that zircon in the Dabu muscovite granites can be classified into three types based on morphology, internal structure, and chemical compositions, and the HREE-rich fluids from magma metasomatized the granites to achieve further enrichment of HREE.
Review
Geochemistry & Geophysics
Peng Liu, Xiangping Gu, Wenlan Zhang, Huan Hu, Xiaodan Chen, Xiaolin Wang, Wenlei Song, Miao Yu, Nigel J. Cook
Summary: Jingwenite-(Y) is a silicate mineral containing rare earth elements (HREE) and vanadium (V), which is the first of its kind discovered in nature. It is abundant in a sediment-hosted stratiform copper deposit in Yushui, South China, and is associated with various minerals. The structure of jingwenite-(Y) represents a new type of nesosilicate.
AMERICAN MINERALOGIST
(2023)
Article
Geochemistry & Geophysics
E. Marquis, K. M. Goodenough, M. P. Smith, G. Estrade, F. Rasolonirina, R. L. Rakotoson
Summary: Alkaline-peralkaline igneous systems are potential sources of rare earth elements, but the gap in the geological record for these systems leads to a lack of understanding about the plumbing system connecting magma chambers to volcanic rocks. The Ampasibitika Intrusion in Madagascar provides a rare exposure of the magmatic-volcanic interface between a deeper magma reservoir and its related caldera volcano. It consists of different types of rocks with varying styles of REE mineralization, including overlying weather profiles.
JOURNAL OF PETROLOGY
(2023)
Article
Engineering, Environmental
Hao Zhou, Xinyi Yu, Junjun Wang, Guanzhou Qiu, Hongbo Zhao, Li Shen
Summary: This study investigated the non-contact bioleaching of REEs using Aspergillus niger strain and explored the optimal culture and leaching conditions. Metabolomic analysis revealed the differential metabolites produced by the strain before and after leaching, highlighting the important roles of organic acids and their derivatives in the process.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Bin Ji, Wencai Zhang
Summary: This study focused on the recovery of rare earth elements (REEs) from kaolinite through selective leaching and the synthesis of zeolites from the leaching residue. The results showed that the pH static leaching method achieved over 90% leaching of REEs from metakaolinite, while only extracting less than 2% of the major constituents. Zeolites with different compositions were successfully synthesized, and high purity sodalite exhibited superior adsorption capacity for Ce3+ compared to zeolite A. These findings suggest that kaolinite could be a potential source for REE recovery, and the resulting leaching residue could be used for the synthesis of zeolites as promising adsorbents for Ce3+ recovery.
Article
Geochemistry & Geophysics
Qiang Weng, Wu-Bin Yang, He-Cai Niu, Ning-Bo Li, Roger H. Mitchell, Shannon Zurevinski, Dan Wu
Summary: This study investigates the time and processes of hydrothermal mineralization using the Maoniuping giant rare earth elements deposit as a case study. The results show that rare earth minerals occur in different forms, with one originating from magmatic processes and others from hydrothermal processes. The mineral compositions and isotopic dating suggest a continuous magmatic-hydrothermal evolution for the rare earth mineralization in the Maoniuping alkaline complex.
AMERICAN MINERALOGIST
(2022)
Article
Geosciences, Multidisciplinary
T. X. Le, P. H. G. M. Dirks, I. V. Sanislav, C. Harris, J. M. Huizenga, H. A. Cocker, G. N. Manestar
Summary: At Tick Hill gold deposit, the quartz delta O-18 values indicate a specific range and are not useful for exploration. These values likely reflect the hydrothermal alteration during the Isan period, but the origin of the altering fluids remains unclear.
AUSTRALIAN JOURNAL OF EARTH SCIENCES
(2022)
Article
Geosciences, Multidisciplinary
Pan Qu, Wubin Yang, Hecai Niu, Ningbo Li, Dan Wu
Summary: Porphyry deposits are a significant source of copper and molybdenum globally. This study demonstrates that apatite can be used as a potential recorder of the magmatic-hydrothermal evolution in porphyry systems, based on an investigation of the giant Daheishan porphyry Mo deposit in NE China.
GEOLOGICAL SOCIETY OF AMERICA BULLETIN
(2022)
Article
Geochemistry & Geophysics
Yang Shen, Yuan-Chuan Zheng, Zeng-Qian Hou, Jan Marten Huizenga, Ai-Ping Zhang, Zi-Xuan Wang, Xin Li, Pei-Yan Xu, Chang-Da Wu, Si-Qi Liu
Summary: The tectono-magmatic history of the Luchun-Jinping microblock and its possible affinity with the Yangtze Craton have significant implications for understanding Cenozoic plate tectonics in southeastern Tibet. This study focuses on the petrogenesis of Eocene-Oligocene lamprophyres in the Luchun-Jinping microblock, which provide insights into the lithospheric mantle source and pre-Cenozoic paleopositon. The results suggest that the Luchun-Jinping microblock can be considered as a dismembered part of the western Yangtze Craton, indicating continental extrusion and Cenozoic sinistral displacement.
Article
Geology
Qiang Weng, He-Cai Niu, Pan Qu, Ning-Bo Li, Qiang Shan, Wu-Bin Yang
Summary: The study on the Maoniuping deposit revealed that the alkaline granite formed slightly later than the syenite, showing characteristics of A-type granitoids. This suggests that the former may have originated from high-temperature partial melting of shallow crust due to the upwelling of asthenospheric mantle.
ORE GEOLOGY REVIEWS
(2022)
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
Geology
Chongwen Xu, Xu Zhao, Jan Marten Huizenga, Junhao Wei, Hongzhi Zhou, Fenglin Wang, Xinming Zhang
Summary: This study focuses on the petrological and geochemical characteristics of Permian-Triassic granitoids from the Nagengkangqieer region in the East Kunlun Orogenic Belt. The Late Permian granodiorite was derived from a mixing source of mafic lower crust and mantle materials, while the Middle Triassic granites were derived from partial melting of the lower continental crust. The closure of the Paleo-Tethys Ocean occurred during the Middle Triassic. The contribution of magmatism to continental crustal growth was relatively small during Late Permian subduction, with crustal reworking dominating regional magmatism.
INTERNATIONAL GEOLOGY REVIEW
(2023)
Article
Geochemistry & Geophysics
Heng Wang, Hongping He, Wubin Yang, Zhiwei Bao, Xiaoliang Liang, Jianxi Zhu, Lingya Ma, Yufeng Huang
Summary: More than 90% of the global heavy rare earth elements (HREE) supply is currently from the ion-adsorption REE deposits in South China. This study explores the mechanisms of HREE enrichment in the granite bedrock of REE mineralized weathering crusts using zircon texture and composition as a proxy. The results show that zircon in the Dabu muscovite granites can be classified into three types based on morphology, internal structure, and chemical compositions, and the HREE-rich fluids from magma metasomatized the granites to achieve further enrichment of HREE.
Article
Geochemistry & Geophysics
Emond W. F. de Roever, Simon L. Harley, Jan M. Huizenga
Summary: The Bakhuis Granulite Belt (BGB) in Surinam exhibits ultrahigh-temperature metamorphism at around 1000 degrees C, resulting in the formation of cordierite with sillimanite and Al-rich orthopyroxene on a regional scale. This cordierite contains a high concentration of CO2 (2.57 +/- 0.19 wt%), the highest ever found in natural cordierite, allowing it to remain stable at UHT conditions with low H2O activity. The presence of fluid-present carbonic conditions during UHT metamorphism suggests a possible external source, such as the mantle, for the high CO2 content.
CONTRIBUTIONS TO MINERALOGY AND PETROLOGY
(2023)
Article
Geochemistry & Geophysics
Jieqi Xing, Yuhang Jiang, Haiyang Xian, Wubin Yang, Yiping Yang, Wei Tan, Hecai Niu, Hongping He, Jianxi Zhu
Summary: This study investigates the mineralization characteristics of rare earth elements in granite veins in Guizhou Province, China using multiple-scale analysis techniques. The research finds that rare earth elements are mainly enriched in quartz veins and exist in minerals at the micrometer scale, and are re-enriched by hydrothermal alteration. The results provide new insights into the mineralization mechanism and resource storage of rare earth elements.
Article
Geology
Xu Zhao, Ning-Bo Li, He-Cai Niu, Yu-hang Jiang, Shuang Yan, Yu-Yuan Yang, Rui-Xin Fu
Summary: This study investigates the main LREE-bearing mineral (allanite) in the Bachi ion adsorption LREE deposit in South China and finds that the structural and geochemical changes from primary allanite to altered allanite make it easier for the allanite to be weathered, leading to the formation of ion adsorption LREE deposits.
ORE GEOLOGY REVIEWS
(2023)
Article
Geology
Yan Zhao, Wubin Yang, Chengbiao Leng, Qiang Shan, Hecai Niu, Ningbo Li
Summary: This study investigates the rare earth element (REE) behavior in zircon from the marginal zone of a granitic pegmatite in Xinjiang, China. The REE anomalies in zircon can be attributed to the sequestration of cerium and the crystallization of heavy REE-enriched minerals. The M-type lanthanide tetrad effects observed in zircon, garnet, and the host granite are likely due to exsolution and interaction with magmatically derived fluids.
ORE GEOLOGY REVIEWS
(2023)
Article
Geochemistry & Geophysics
Yong Wang, Chuankai He, Juxing Tang, Jan Marten Huizenga, Liqiang Wang, Xinghai Lang
Summary: We investigate the factors controlling hydrothermal wolframite and scheelite precipitation in the Jiaoxi tungsten deposit in Tibet, China using mineral geochemistry and sulfur stable isotope geochemistry. The results suggest that the hydrothermal system involved fluid-fluid mixing, greisenization, and interaction with meteoric water. Multiple sources of iron, including magmatic fluids and leaching from biotite monzogranite porphyry and shale, contributed to the formation of wolframites with varying Fe/(Fe+Mn) ratios. These findings provide insights into the formation processes of tungsten deposits.
AMERICAN MINERALOGIST
(2023)
Article
Chemistry, Analytical
Yan Zhao, Wubin Yang, Chengbiao Leng
Summary: This study presents new findings on the mass-independent fractionation (MIF) during Mo isotope measurement by MC-ICP-MS and its implications for the double spike (DS) technique. It identifies the existence of MIF for the first time and suggests the use of an additional standard-sample bracketing (SSB) method for accurate isotope ratios in the application of the DS technique.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2023)
