Weathering of glauconites: reversal of the glauconitization process in a soil profile in western France
Keyword(s):
X Ray
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AbstractPolarizing microscope, electron microprobe and X-ray diffraction examination of minerals in a soil profile developed on a glauconite sand indicate that destabilization of glauconite can be a progressive process which appears to be the reverse of glauconitization. Glauconite in these soils appears to be destabilized into a mixed-layer glauconite-nontronite phase, which crystallizes as a plasma mineral. This material in turn is transformed into smectite+kaolinite+oxides. Loss of K and Fe is evident in whole rock as well as microprobe analyses of the samples. Thus glauconite can lose both Fe and K to aqueous solution during weathering, leaving aluminous clay minerals in the soil.
1978 ◽
Vol 51
(11)
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pp. 3227-3231
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2016 ◽
Vol 80
(7)
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pp. 1243-1254
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