Synchrotron-based speciation of chromium in an Oxisol from New Caledonia; importance of secondary Fe-oxyhydroxides

• Published in: The American mineralogist Vol. 94; no. 5-6; pp. 710 - 719
• Main Authors: Fandeur, Dik, Juillot, Farid, Morin, Guillaume, Olivi, Luca, Cognigni, Andrea, Ambrosi, Jean-Paul, Guyot, François, Fritsch, Emmanuel
• Format: Journal Article
• Language: English
• Published: Washington Mineralogical Society of America 01.05.2009; De Gruyter; Walter de Gruyter GmbH
• Subjects: Bedrock; chemical fractionation; chromite; Chromium; cobalt; electron probe data; EXAFS data; Geochemistry; hydroxides; igneous rocks; Iron; iron hydroxides; laterites; laterization; Melanesia; metals; meteorology; Mineralogy; Minerals; New Caledonia; nickel; Oceania; oxides; Oxisol; Oxisols; plutonic rocks; rock, sediment, soil; Rocks; SEM data; Silicates; soils; Speciation; spectra; synchrotron radiation; Trace elements; trace metals; valency; Weathering; X-ray spectra; XANES spectra; New Caledonia
• ISSN: 0003-004X; 1945-3027
• DOI: 10.2138/am.2009.3073

In New Caledonia, the weathering of ultamafic rocks under a tropical climate has led to the residual accumulation of trace elements in lateritic soils widely dominated by Fe-oxyhydroxides. The speciation of trace elements, such as Cr, Ni, and Co, in these Oxisols remains a major subject of interest...