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
We have collected ∼500 stream waters and associated bed-load sediments over an ∼400 km 2 region of Eastern Canada and analyzed these samples for Fe, Mn, and the rare earth elements (REE + Y). In addition to analyzing the stream sediments by total digestion (multi-acid dissolution with metaborate fus...
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| Veröffentlicht in: | Geochimica et cosmochimica acta 2008-12, Vol.72 (24), p.5962-5983 |
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| Hauptverfasser: | , |
| Format: | Artikel |
| Sprache: | eng |
| Online-Zugang: | Volltext |
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| Zusammenfassung: | We have collected ∼500 stream waters and associated bed-load sediments over an ∼400
km
2 region of Eastern Canada and analyzed these samples for Fe, Mn, and the rare earth elements (REE + Y). In addition to analyzing the stream sediments by total digestion (multi-acid dissolution with metaborate fusion), we also leached the sediments with 0.25
M hydroxylamine hydrochloride (in 0.05
M HCl), to determine the REE
+
Y associated with amorphous Fe- and Mn-oxyhydroxide phases. We are thus able to partition the REE into “dissolved” ( |
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| ISSN: | 0016-7037 1872-9533 |
| DOI: | 10.1016/j.gca.2008.09.022 |