Abstract
The tropical weathering of sedimentary kaolin deposits from the plateaux surrounding Manaus (Alter do Chao formation, Amazon basin, Brazil) leads to the in situ formation of thick kaolinitic soils. The structural changes of kaolinite have been investigated quantitatively by infrared spectroscopy and electron paramagnetic resonance. Both techniques consistently show that each sample contains two types of kaolinite in various proportions. The progressive decrease in kaolinite order from the bottom to the top of the profile results from the gradual replacement of an old population of well-ordered kaolinite, typical of the underlying sedimentary kaolin, by a more recent generation of poorly ordered soil kaolinite. The vertical pattern of kaolinite replacement differs from that of the transformation of Fe oxides and oxyhydroxides previously observed in the same profile. The inherited fraction of well-ordered kaolinite ranges from 60% at a depth of 9 m to 30% in the upper levels of the soil. The persistence of sedimentary kaolinite in the upper horizons suggests that the rate of kaolinite transformation is relatively slow at the time scale of lateritic soil formation. Kaolinite inheritance unlocks the lateritic record of past weathering conditions.
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Artioli, G., Bellotto, M., Gualtieri, A. and Pavese, A. (1995) Nature of structural disorder in natural kaolinites: a new model based on computer simulation of powder diffraction data and electrostatic energy calculation. Clays and Clay Minerals, 43, 438–445.
Balan, E., Allard, T., Boizot, B., Morin, G. and Muller, J.-P. (1999) Structural Fe3+ in natural kaolinites: New insights from electron paramagnetic resonance spectra fitting at X and Q-band frequencies. Clays and Clay Minerals, 47, 605–616.
Balan, E., Allard, T., Boizot, B., Morin, G. and Muller, J.-P. (2000) Concentration of paramagnetic structural Fe(+III) in natural kaolinites. Clays and Clay Minerals, 48, 439–445.
Balan, E., Saitta, A.M., Mauri, F. and Calas, G. (2001) First-principles modeling of the infra-red spectrum of kaolinite. American Mineralogist, 86, 1321–1330.
Balan, E., Allard, T., Fritsch, E., Sélo, M., Falguères, C., Chabaux, F., Pierret, M.-C. and Calas, G. (2005a) Formation and evolution of lateritic profiles in the middle Amazon basin: Insights from radiation-induced defects in kaolinite, Geochimica et Cosmochimica Acta, 69, 2193–2204.
Balan, E., Lazzeri, M., Saitta, A.M., Allard, T., Fuchs, Y. and Mauri, F. (2005b) First-principles study of OH stretching modes in kaolinite, dickite and nacrite. American Mineralogist, 90, 50–60.
Bookin, A.S., Drits, V.A., Plançon, A. and Tchoubar, C. (1989) Stacking faults in kaolin-group minerals in the light of real structural features. Clays and Clay Minerals, 37, 297–307.
Brindley, G.W., Kao, C.-C., Harrison, J.L., Lipsicas, M. and Raythatha, R. (1986) Relation between structural disorder and other characteristics of kaolinites and dickites. Clays and Clay Minerals, 34, 239–249.
Delineau, T., Allard, T., Muller, J-P., Barres, O., Yvon, J. and Cases, J.-M. (1994) FTIR reflectance vs. EPR studies of structural iron in kaolinites. Clays and Clay Minerals, 42, 308–320.
Farmer, V.C. (1974) The Infrared Spectra of Minerals. Mineralogical society, London.
Fritsch, E., Montes-Lauar, C.R., Boulet, R., Melfi, A.J., Balan, E. and Magat, Ph. (2002) Lateritic and redoximorphic features in fractured soils and sediments of the Manaus plateaus, Brazil. European Journal of Soil Science, 53, 203–218.
Fritsch, E., Morin, G., Bedidi, A., Bonnin, D., Balan, E., Caquineau, S. and Calas, G. (2005) Transformation of haematite and Al-poor goethite to Al-rich goethite and associated yellowing in a ferralitic clay soil profile of the middle Amazon basin (Manaus, Brazil). European Journal of Soil Science, 56, 575–588.
Giese, R.F., Jr. (1988) Kaolin minerals: structures and stabilities. Pp. 29–66 in: Hydrous Phyllosilicates (Exclusive of Micas) (S.W. Bailey, editor). Reviews in Mineralogy, vol. 19. Mineralogical Society of America, Washington, D.C.
Giral-Kacmarcik, S., Savin, S.M., Nahon, D.B., Girard, J.-P., Lucas, Y. and Abel, L. (1998) Oxygen isotope geochemistry of kaolinite in laterite-forming processes, Manaus, Amazonas, Brazil. Geochimica et Cosmochimica Acta, 62, 1865–1879.
Girard, J.-P., Freyssinet, Ph. and Chazot, G. (2000) Unraveling climatic changes from intraprofile variation in oxygen and hydrogen isotopic compositions of goethite and kaolinite in laterites: An integrated study from Yaou, French Guiana. Geochimica et Cosmochimica Acta, 64, 409–426.
Iriarte, I., Petit, S., Javier Huertas, F., Fiore, S., Grauby, O., Decarreau, A. and Linares, J. (2005) Synthesis of kaolinite with a high level of Fe3+ for Al substitution. Clays and Clay Minerals, 53, 1–10.
Kogure, T. and Inoue, A. (2005) Determination of defect structure in kaolin minerals by high-resolution transmission electron microscopy. American Mineralogist, 90, 85–89.
Lucas, Y., Boulet, R. and Chauvel, A. (1990) In situ genesis of stone lines. Demonstrative example from a lateritic cover in Brazilian Amazonia. Comptes Rendus de l’Académie des Sciences de Paris, 311, 713–718.
Lucas, Y., Luizão, F.J., Chauvel, A., Rouiller, J. and Nahon, D. (1993) The relation between biological activity of the rain forest and mineral composition of soils. Science, 260, 521–523.
Lucas, Y., Nahon, D., Cornu, S. and Eyrolle, F. (1996) Genèse et fonctionnement des sols en milieu équatorial. Comptes Rendus de l’Académie des Sciences de Paris, 322, 1–16.
Mehra, O.P. and Jackson, M.L. (1960) Fe oxide removal from soil and clays by a dithionite-citrate system buffered with sodium carbonate. Clays and Clay Minerals, 7, 317–327.
Muller, J.P. and Bocquier, G. (1987) Textural and mineralogical relationships betweeen ferruginous nodules and surrounding clayey matrices in a laterite from Cameroon. Pp. 186–196 in: Proceedings of the International Clay Conference, Denver, 1985 (L.G. Schultz, H. van Olphen and F.A. Mumpton, editors). The Clay Minerals Society, Bloomington, Indiana.
Muller, J.P. and Calas G. (1993) Mn2+-bearing kaolinites from lateritic weathering profiles: geochemical significance. Geochimica et Cosmochimica Acta, 57, 1029–1037.
Petit, S. and Decarreau, A. (1990) Hydrothermal (200°C) synthesis and crystal chemistry of iron-rich kaolinites. Clay Minerals, 25, 181–196.
Plançon, A., Giese, R.F., Snyder, R., Drits, V.A. and Bookin, A.S. (1989) Stacking faults in the kaolin-group minerals: The defect structure of kaolinite. Clays and Clay Minerals, 37, 203–210.
Prost, R., Damene, A., Huard, E., Driard, J. and Leydecker, J.P. (1989) Infrared study of structural OH in kaolinite, dickite, nacrite and poorly crystalline kaolinite at 5 to 600 K. Clays and Clay Minerals, 37, 464–468.
Stone, W.E.E. and Torres-Sanchez, R.M. (1988) Nuclear magnetic resonance spectroscopy applied to minerals. Part 6. Structural iron in kaolinites as viewed by proton magnetic resonance. Journal of the Chemical Society, Faraday Transactions I, 84, 117–132.
Tardy, Y. (1993) Pétrologie des Latérites et des Sols Tropicaux. Masson, Paris.
Tardy, Y. and Roquin, C. (1998) Dérive des Continents. Paléoclimats et Altérations Tropicales. Editions BRGM, Orléans, France, 469 pp.
Thiry, M. (2000) Palaeoclimatic interpretation of clay minerals in marine deposits: an outlook from the continental origin. Earth-Science Reviews, 49, 201–221.
Varajão, A.F.D.C., Gilkes, R.J. and Hart, R.D. (2001) The relationships between kaolinite crystal properties and the origin of materials for a brazilian kaolin deposit. Clays and Clay Minerals, 49, 44–59.
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Balan, E., Fritsch, E., Allard, T. et al. Inheritance vs. neoformation of kaolinite during lateritic soil formation: A case study in the middle Amazon basin. Clays Clay Miner. 55, 253–259 (2007). https://doi.org/10.1346/CCMN.2007.0550303
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DOI: https://doi.org/10.1346/CCMN.2007.0550303