Sudalpino

Représentation et statut

Couleur CMYK

N/A

Couleur RGB

R: 241 G: 239 B: 237

Rang

domaine tectonique

Usage

Ce terme est en usage.

Status

valide

Nomenclature

Deutsch

Südalpin

Français

Sudalpin

Italiano

Sudalpino

English

Southalpine

Variantes historiques

Southalpine, Alpi meridionali lombarde (Godenzi 1963), Southern Alps = Alpi meridionali (Dal Piaz et al. 1973), Südalpen (Trümpy 1974), Sudalpino = Alpi meridionali (Sciesa 1991), Alpi Meridionali = Sudalpino (Dal Piaz et al. 1992a), Südalpin (Spillmann 1993)

Description

Description

... mit südgerichtete Überschiebungen und Falten.

Références

Révision

Gouffon Yves (Editor) (2024) : Tectonic Map of Switzerland 1:500000, Explanatory notes. Federal Office of Topography swisstopo, Wabern

p.100: The South Alpine tectonic domain exposes a complete section of the Adriatic continental crust from ultramafic (slices of uppermost continental mantle lithosphere), mafic and felsic granulite-facies rocks (lower continental crust: Ivrea Zone) through medium- and low-grade basement rocks (middle – upper continental crust: Strona-Ceneri and Val Colla zones, basement of the Orobic units) to unconformably overlying non-metamorphic Late Carboniferous sediments that were involved in post-Variscan folding (Graeter 1951, Reinhard 1964).

p.101: The detached Variscan continental crust and its overlying Permian to Miocene sedimentary cover form a fold-and-thrust belt, the southern back-chain of the Alps defined as the South Alpine tectonic domain. This S-vergent back-chain is separated from the other domains of the Western and Central Alps to the west by the Canavese Fault and to the north by the Tonale Fault (see § 10.1). Both faults are part of an Oligocene – Miocene post-collisional system of transpressive transfer faults along the northwestern boundary of the Adriatic indenter. In the Ticino transect, the Central Alps have been uplifted by some 15 km with respect to the Southern Alps along this fault system (Hurford 1986). In the east, the western sector of the South Alpine domain (Piemonte and Lombardia) is separated from the eastern one (Trentino – Veneto) by the southern branch of the Giudicarie Fault.
To the south, the Late Miocene (Messinian) to Quaternary deposits of the Po Plain unconformably cover the most external and youngest South Alpine thrust sheets (Milan Belt). During Mesozoic extension and Alpine orogeny, the rocks of the Variscan basement underwent high anchizone (sub-greenschist) to lower greenschist-facies metamorphism (Crespi et al. 1982, Spall a & Goss o 1999, Spalla et al. 1999), and the deformation occurred mainly under brittle conditions.