Modification of a rare-earth element deposit by low-temperature partial melting during metamorphic overprinting: Norra Kärr alkaline complex, southern Sweden
| Autor: | Thomas Zack, Denise K. Honn, Ethan F. Baxter, Axel S.L. Sjöqvist |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Mineral
010504 meteorology & atmospheric sciences Rare-earth element Geochemistry Partial melting Eudialyte Geology engineering.material 010502 geochemistry & geophysics 01 natural sciences Silicate Bastnäsite chemistry.chemical_compound chemistry Geochemistry and Petrology Monazite Geochronology engineering 0105 earth and related environmental sciences |
| Zdroj: | Chemical Geology. 545:119640 |
| ISSN: | 0009-2541 |
| DOI: | 10.1016/j.chemgeo.2020.119640 |
| Popis: | Rare-earth elements play a crucial role in modern technologies and are necessary for a transition to a green economy. Potentially economic deposits of these elements are typically hosted in minerals such as monazite, bastnasite, and eudialyte (a complex Na-Ca-Fe-Zr silicate mineral with Cl), making these prime targets for geological research. Globally, rare-earth mineral deposits commonly show evidence of polyphase development and mineralisation processes, which need to be better understood to improve exploration strategies. The Norra Karr alkaline complex (Sweden) contains a globally significant deposit of rare-earth elements, hosted in the mineral eudialyte. In this study, we focussed on eudialyte crystals in undeformed, cross-cutting pegmatoid veins from Norra Karr. In order to determine their age, we refined an established micromilling method to enable sampling of minerals rich in rare-earth elements for precise analysis of major and trace elements, Nd isotope ratios, and Sm-Nd geochronology down to a scale of |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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