Influence of clay mineralogy on the stability of a landslide in Plio-Pleistocene clay sediments near Grassano (Southern Italy)

Auteur(s) et Affiliation(s)

SUMMA, V.

Ist. di Metodologie per l'Analisi Ambientale - CNR, Potenza, Italie

TATEO, F.

Ist. di Geoscienze e Georisorse - CNR, Dip. Geoscienze, Univ., Padua, Italie

GIANNOSSI, M.L.

Ist. di Metodologie per l'Analisi Ambientale - CNR, Potenza, Italie

BONELLI, C.G.

Ist. di Metodologie per l'Analisi Ambientale - CNR, Potenza, Italie

Description :
Clayey silts involved in a landslide have been sampled to study the role of sediment composition in developing sliding surfaces. Five drillings enabled the collection of 46 samples and to define active slide surfaces and non-active surfaces (discontinuities). Results and discussion about the granulometrical, chemical and mineralogical data. Scanning electron microscopy demonstrated that active slide surfaces have an open texture, clay minerals are impoverished and non-oriented, whereas secondary phases (hematite and gypsum) are enriched. There is a relationship between geotechnical features and mineralogical composition.

Type de document :
Article de périodique

Source :
Catena (Giessen), issn : 0341-8162, 2010, vol. 80, n°. 2, p. 75-85, nombre de pages : 11, Références bibliographiques : 37 ref.

Date :
2010

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

Langue :
Anglais