Fe-Ga rare earth elements

Introduction

The study of rare earth elements (REEs) in iron-rich environments, such as mining areas and iron formations, provides valuable insights into geochemical processes and environmental impacts. This synthesis examines the occurrence, distribution, and analytical methods related to REEs in Fe-Ga contexts, drawing from recent research findings.

Key Insights

High REE Concentrations in Mining Areas:
- Stream waters in mining areas can exhibit very high REE contents, with middle rare earth elements (MREEs) often enriched compared to light (LREEs) and heavy (HREEs) elements, forming a characteristic "roof-shaped" pattern.
- The source of REEs in these environments is often linked to mine tailings, particularly those rich in iron materials, and their release is influenced by pH levels and the formation of Fe-rich flocs.
Role of Fe-Oxides/Oxyhydroxides in REE Release:
- Fe-oxides and oxyhydroxides play a crucial role in the release and scavenging of REEs in aqueous systems, significantly affecting their geochemical behavior and distribution.
Analytical Methods for REE Determination in Fe-Minerals:
- The laser ablation ICP-quadrupoleMS technique, using external calibration, is effective for determining REE plus Y contents in Fe-(hydr)oxides at trace levels, overcoming challenges such as low concentrations and matrix complexity.
- This method has been successfully applied to analyze REE patterns in various iron minerals, such as magnetite, martite, hematite, and goethite, from iron formations, providing consistent results with previous bulk analyses.

Conclusion

Research indicates that REEs in Fe-Ga environments, particularly in mining areas and iron formations, are significantly influenced by the presence of iron-rich materials and geochemical conditions such as pH. Analytical advancements, like the laser ablation ICP-quadrupoleMS technique, have improved the accuracy and reliability of REE measurements in these complex matrices. These findings enhance our understanding of REE distribution and behavior in iron-rich geological settings.

Fe-Ga rare earth elements

Summary

Introduction

Key Insights

Conclusion

Sources and full results

High contents of rare earth elements (REEs) in stream waters of a Cu-Pb-Zn mining area.

High rare earth element contents in stream waters from an old mining area are mainly due to Fe-oxides/oxyhydroxides, which play a key role in lanthanide element release into stream waters.

Determination of rare earth elements in Fe-minerals using external calibration by LA-ICP-MS and application on Cauê Iron Formation (Brazil).

The developed method effectively determines rare earth elements at trace levels in Fe-minerals, providing valuable information for iron formation studies.

Influences of rare earth element Ce-doping and melt-spinning on microstructure and magnetostriction of Fe83Ga17 alloy

Ce-doping and melt-spinning improve magnetostriction in Fe83Ga17 alloy by forming CeGa 2 and asymmetrical DO 3 phases, with the melt-spun alloy showing the highest magnetostriction.

Rare earth element redistribution during high-pressure–low-temperature metamorphism in ophiolitic Fe-gabbros (Liguria, northwestern Italy): Implications for light REE mobility in subduction zones

High-pressure-low-temperature metamorphism in Ligurian metaophiolites redistributes rare earth elements among newly formed minerals, with lawsonite being the major carrier for light REE and titanite playing a role for middle and heavy REE.

Rare earth elements in pore waters of marine sediments

Pore water rare earth elements in marine sediments can be grouped into three categories: Fe-source, POC-source, and cerium oxide, with Mn-oxides not being an important carrier in the oceans.

Rare earth elements in soil and plant systems - A review

Low concentrations of rare earth elements may favor plant growth and productivity, but their physiological mechanisms remain unresolved.

GEOCHEMISTRY OF RARE EARTH ELEMENTS

Rare-earth elements are more common in nature than many industrially important nonferrous metals, and their study can aid geochemical prospecting, mineralization processes, and geologic processes.

Rare earth elements as nonabsorbable fecal markers in studies of iron absorption.

Rare earth elements can accurately predict iron absorption from only one or two stools, with medium iron bioavailability and highly bioavailable reference doses.

Rare Earth Elements: Minerals, Mines, Magnets (and More)

Rare earth elements are essential for everyday life and have diverse uses, but their supply is currently limited to China.

Rare earth elements (REE) and yttrium in stream waters, stream sediments, and Fe–Mn oxyhydroxides: Fractionation, speciation, and controls over REE + Y patterns in the surface environment

Surface waters show negative Ce and Eu anomalies, while partial extraction sediments show more pronounced Ce and Eu anomalies.

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