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- W193746164 abstract "Acid ammonium oxalate and dithionite-citrate-bicarbonate were used as extractants for studying the spatial distribution of Fe and Mn in thin section. Materials used were nodules from a terra rossa (44R and 14B); a bog-iron ore (B9) and an Fe-rich clod from a solfataric volcano (P21). Results showed that the red and black bands in sample 44R correspond to Fe and Mn accumulations, respectively. Their distri-bution around an undifferentiated nucleus suggests a polygenetic and reductomorphic origin. The unusually high ratio of oxalate extractable Fe to dithionite-citrate-bicarbonate extractable Fe (>1.0) in B9 is attributed to the presence of vivianite and siderite, both of them being more soluble in NH4-oxalate than in DCB. In situ removal of Fe is very useful in “cleaning” the section prior to a detailed investigation of the microstructure." @default.
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- W193746164 date "1990-01-01" @default.
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- W193746164 title "A Study on the Distribution and Extraction of Iron (And Manganese) in Soil Thin Sections" @default.
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- W193746164 doi "https://doi.org/10.1016/s0166-2481(08)70378-7" @default.
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