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- W2186387129 abstract "Marine, lacustrine and terrestrial soil cores, sampled in a restricted area of Wood Bay in Antarctica, were characterised by 57Fe Mossbauer spectroscopy. The results of X-ray diffraction and instrumental neutron activation analysis are shortly discussed too. The soils, formed by mechani- cal disgregation and weathering of rocks of volcanic origin from Mt. Melbourne, consist of alkaline feldspars, olivines, augitic clinopyroxenes, and iron oxides such as haematite, goethite, and magnetite. Lacustrine and terrestrial soils are richer in clinopyroxenes whereas marine soils are richer in olivines. This finding shows that the soils retain a content in olivines and clinopyroxenes comparable to that found in the parent lava outcropped from Mt. Melbourne volcano. The soils appear at the initial stage of weathering. Two main weathering effects are observed: 1) atmospheric oxygen determines the oxidation of the iron(II) present in olivines and clinopyroxenes and the neo-formed iron(III) is mainly retained in silicate sites as structural iron(III); 2) a part of magnetite, present as a primary constituent of the volcanic rocks, is oxidised to bulk haematite and goethite." @default.
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- W2186387129 date "2000-01-01" @default.
- W2186387129 modified "2023-09-27" @default.
- W2186387129 title "SOME ANTARCTIC SOIL CORES FROM WOOD BAY CHARACTERISED BY MÖSSBAUER SPECTROSCOPY" @default.
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