Deep weathering and landscape evolution in a tropical plateau

Auteur(s) et Affiliation(s)

MODENESI-GAUTTIERI, M.C.

Inst. Geológico, Secretaria do Meio Ambiente, São Paulo, Bresil

MOTTA DE TOLEDO, M.C.

Escola de Artes, Ciências e Humanidades - Univ., São Paulo, Bresil

Inst. de Geociências, Univ., São Paulo, Bresil

TAKASHI HIRUMA, S.

Inst. Geológico, Secretaria do Meio Ambiente, São Paulo, Bresil

TAIOLI, F.

Escola de Artes, Ciências e Humanidades - Univ., São Paulo, Bresil

SHIMADA, H.

Inst. Geológico, Secretaria do Meio Ambiente, São Paulo, Bresil

Description :
Six complete profiles of the weathering mantle were sampled by drilling on the three stepped levels of the Campos do Jordão Plateau, on the NW flank of the Continental Rift of Southeastern Brazil. Mineralogical and micromorphological analyses of drill core samples, complemented by geochemical interpretations and by previous data on the upper saprolite, indicate continuity of a general lateritic trend during the entire process of mantle formation. Lateritization phases of different intensity were defined and considered to reflect adjustment to changes in environmental conditions created by the gradual uplift of the plateau to its present position.

Type de document :
Article de périodique

Source :
Catena (Giessen), issn : 0341-8162, 2011, vol. 85, n°. 3, p. 221-230, nombre de pages : 10, Références bibliographiques : 1 p.

Date :
2011

Editeur :
Pays édition : Allemagne, Cremlingen-Destedt, Catena

Langue :
Anglais