Free Content Can chromite weathering be a source of Cr in soils?

Authors: Garnier, J.; Quantin, C.; Guimarães, E.; Becquer, T.

Source: Mineralogical Magazine, Volume 72, Number 1, February 2008 , pp. 49-53(5)

Publisher: Mineralogical Society

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Abstract:

At Niquelândia, Cr extracted from the soil (5,000-9,300 mg.kg−1) is likely the result of the Cr-bearing Fe-oxides compared to the Cr-spinels, showing that low Cr-containing minerals present in the dunite (enstatite, olivine and clay minerals) have been completely dissolved. The chromites, accumulated inside soil profiles, have undergone chemical weathering, leading to a Cr enrichment during soil genesis. Traces of dissolution inside the soil chromites suggest that they can be slowly weathered. In this case chromites could represent a diffuse source of available Cr(III) within the soil profiles.

Document Type: Research article

DOI: 10.1180/minmag.2008.072.1.49

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