Relief evolution of the Quadrilátero Ferrífero (Minas Gerais, Brazil) by means of (Be 10) cosmogenic nuclei

Auteurs :
SALGADO, A.A.R.
BRAUCHER, R.
VARAJÃO, C.A.C.
NALINI, H.A.

Description :
To quantify the erosion processes acting on the rock types that compose the Quadrilátero Ferrífero substrate, Be 10 concentrations were measured in fluvial sediments. The results indicate that the regional landscape evolution is controlled by lithotypes : the most resistant areas correspond to substrates developed on itabarites and quartzites (long-term erosion rates between 0.29 to 2.35 m/My), whereas the most fragile ones developed on schist-phyllites (long-term erosion rates between 7.95 to 11.82 m/My) and granite-gneisses (long-term erosion rate at 12.92 m/My).


Type de document :
Article de périodique

Source :
Zeitschrift für Geomorphologie, issn : 0372-8854, 2008, vol. 52, n°. 3, p. 317-323, nombre de pages : 7, Collation : Illustration, Références bibliographiques : 16 ref.

Date :
2008

Editeur :
Pays édition : Allemagne, Stuttgart, Gebruder Borntraeger