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Improving soil clay minerals studies by high-gradient magnetic separation

Published online by Cambridge University Press:  09 July 2018

D. Righi  and
P. Jadault
D. Righi
Affiliation:
UA 721 du CNRS, Laboratoire de Pédologie, Faculté des Sciences, 86022 Poitiers Cédex, France
P. Jadault
Affiliation:
UA 721 du CNRS, Laboratoire de Pédologie, Faculté des Sciences, 86022 Poitiers Cédex, France
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Abstract

High-gradient magnetic separation (HGMS) performed on the clay fraction (< 1 µm) of acid soils facilitates the separation and concentration of mineral fractions according to their Fe and Mg contents. As a result, smectitic layers formed by weathering of a chlorite were identified although they were not detected in the bulk sample. The concentration in the non-magnetic fraction of minerals with an intergrade vermiculite-chlorite behaviour enabled more accurate information to be obtained on these minerals.

Type
Research Article
Information
Clay Minerals , Volume 23 , Issue 2 , June 1988 , pp. 225 - 232
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1988

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References

Bain, D.C. (1977) The weathering of ferruginous chlorite in a podzol from Argyllshire, Scotland. Geoderma 17, 193–208.CrossRefGoogle Scholar
De Coninck, F., Conry, M. & Tavernier, R. (1975) Influence of iron-bearing minerals, especially chlorite, on soil development of Irish brown podzolic soils. Proc. Int. Clay Conf. Mexico City, 573–584.Google Scholar
De Coninck, F., Van Ranst, E. & Jensen, W. (1983) Trioctahedral or dioctahedral chlorite in soils; examples of a Distrochrept (Corsica), a Cryorthod (Norway) and a Haplaqualf (France). Sci. Geol. Mem. 73, 75–84. Google Scholar
Douglas, L.A. (1967) Sodium citrate-dithionite induced alteration of biotite. Soil Sci. 103, 191–195.CrossRefGoogle Scholar
Herbillon, A.J. & Makumbi, M.N. (1975) Weathering of chlorite in a soil derived from a chlorite schist under humid tropical conditions. Geoderma 13, 89–104.CrossRefGoogle Scholar
Hughes, J.C. (1982) High gradient magnetic separation of some soil clays from Nigeria, Brazil and Columbia. I. The inter-relationships of iron and aluminium extracted by acid ammonium oxalate and carbon. J. Soil Sci. 33, 509–519.Google Scholar
Jackson, M.L. (1963) Interlayering of expansible layer silicates in soils by chemical weathering. Clays Clay Miner. 11, 29–46.Google Scholar
Jeanroy, E. (1972) Analyse totale des silicates naturels par spectrophotométrie d'adsorption atomique. Application au sol et a ses constituants. Chim. Anal. 54, 159–166.Google Scholar
Jeanroy, E. (1983) Diagnostic des formes du fer dans les pédogénèses temperees. Evaluation par les reactifs chimiques d'extraction et apports de la spectrometrie Mossbauer. Thèse Univ. Nancy, France.Google Scholar
Mehra, O.P. & Jackson, M.L. (1960) Iron oxide removal from soils and clays by a dithionite-citrate system buffered with sodium bicarbonate. Clays Clay Miner. 7, 317–327.Google Scholar
Oberteuffer, J. A. (1974) Magnetic separation: a review of principles, devices, and applications. IEEE Trans. Magnetics 10, 223–238.CrossRefGoogle Scholar
Righi, D. Girault, P. & Meunier, A. (1986) Transformations des phyllosilicates dans un sol cryptopodzolique humifere du Plateau de Millevaches, France. Clay Miner. 21, 43–54.CrossRefGoogle Scholar
Righi, D. & Lorphelin, L. (1986) Weathering of silt and clay in soils of a toposequence in the Himalayas, Nepal. Geoderma 39, 241–255.Google Scholar
Rouiller, J., Burtin, G. & Souchier, B. (1974) Note sur Tutilisation de Thypochlorite de sodium dans Tanalyse granulometrique des sols. Bull. ENSAIA, Nancy XVI, 89–98.Google Scholar
Russell, J.D., Birnie, A. & Fraser, A.R. (1984). High-gradient magnetic separation (HGMS) in soil clay mineral studies. Clay Miner. 19, 771–778.CrossRefGoogle Scholar
Schulze, D.G. & Dixon, J.B. (1979) High gradient magnetic separation of iron oxide minerals from soil clays. Soil Sci, Soc. Am. J. 43, 793-799.CrossRefGoogle Scholar
Senkayi, A.L., Dixon, J.B. & Hossner, L.R. (1981) Transformation of chlorite to smectite through regularly interstratified intermediates. Soil Sci. Soc. Am. J. 45, 650–656.CrossRefGoogle Scholar
Tamura, T. (1958) Identification of clay minerals from acid soils. J. Soil Sci. 9, 141–147.CrossRefGoogle Scholar
Theng, B.K.G., Churchman, G.J. & Newman, R.H. (1986) The occurrence of interlayer clay-organic complexes in two New Zealand soils. Soil Sci. 142, 262–266.CrossRefGoogle Scholar