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(Article of periodic en Anglais - 2012)

Document title

Spatial variations of soil weathering processes in a tropical mountain environment : The Baturité massif and its piedmont (Ceará, NE Brazil)

Authors(s) and Affiliation(s)

BÉTARD F. (1) ;
(1) Univ. Paris-Diderot, Sorbonne Paris Cité, Lab. PRODIG, UMR 8586 CNRS, Paris, FRANCE

Abstract

With combined field surveys and laboratory analyses, involving micromorphological observations as well as geochemical and mineralogical investigations, this study demonstrates a close spatial correlation between soil weathering processes and present-day water balance (WBI) variations in the uplands and piedmont zones of the Baturité massif. Given that soils and weathering mantles are integrators of “average” bioclimatic conditions that prevail at timescales of 1 to 10 Myr, the distribution of soil weathering signatures in the study area is probably reflective of inevitable, long-term (Quaternary to Neogene) climatic fluctuations around median values close to the present ones. Paleoclimatic legacies inherited from the Paleogene lateritization event are rare, because of the denudation pulse occurring in the Late Tertiary and favoring soil stripping to the paleoweathering front on the erosional piedmont

Source

Article of periodic

published at : Catena / ISSN 0341-8162

Editor : Catena, Cremlingen-Destedt - ALLEMAGNE (1973)

Millesime : 2012, vol. 93 [pp. 18-28]

Bibliographic references : 39 ref.

Collation : 9 fig., 3 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 16767

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1016/j.catena.2012.01.013

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2012
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