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Influence of parent material on clay minerals formation in Podzols of Trentino, Italy

Published online by Cambridge University Press:  09 July 2018

A. Mirabella ,
M. Egli ,
S. Carnicelli  and
G. Sartori
A. Mirabella*
Affiliation:
Istituto Sperimentale per lo Studio e la Difesa del Suolo, P.zza D'Azeglio 30, 50121 Firenze, Italy
M. Egli
Affiliation:
Department of Physical Geography, University of Zürich, Winterthurerstrasse 190, 8057 Zürich, Switzerland
S. Carnicelli
Affiliation:
Dipartimento di Scienza del Suolo e Nutrizione della Pianta, Università di Firenze, P.le Cascine 16, 50144 Firenze, Italy
G. Sartori
Affiliation:
Museo Tridentino di Scienze Naturali, Via Calepina 14, 38100 Trento, Italy
*
*E-mail: aldo.mirabella@issds.it
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Abstract

The formation of clay minerals was investigated in Spodosols developed in the subalpine belt, with similar exposure, climate and age, but deriving from different parent materials. All the soils were classified as Haplic Podzols and showed the characteristic eluviation and illuviation features of Fe, Al and organic carbon. However, varying parent material lithology led to different clay mineral assemblages in the soil. Smectite could be found in the E horizons of soils developed from granodiorite and tonalite materials. Its formation was strongly dependent on the presence of chlorite in the parent material. If nearly no other 2:1 mineral components, such as chlorite, are present in the lower soil horizons, then a residual micaceous mineral becomes the dominant clay mineral. The latter derives from a mica-vermiculite interstratified mineral.

Keywords

weatheringpodzolsmectitemica-vermiculiteItaly
Type
Research Article
Information
Clay Minerals , Volume 37 , Issue 4 , December 2002 , pp. 699 - 707
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2002

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