Lizun-Einheit

Représentation et statut

Couleur CMYK
N/A
Couleur RGB
R: 241 G: 239 B: 237
Rang
unité tectonique
Usage
Ce terme est en usage.
Status
terme local (informel)

Nomenclature

Deutsch
Lizun-Einheit
Français
unité du (Piz) Lizun)
Italiano
unità del (Piz) Lizun
English
Lizun unit
Origine du nom

Piz Lizun (GR)

Variantes historiques

Lizun-Einheit (Spillmann 1993), Lizun unit (TK500 / Gouffon et al. 2024)

Hiérarchie et succession

Limite supérieure

Margna-Decke (Maloja-Teildecke)

Limite inférieure

Turba-Mylonitzone

Paléogéographie et tectonique

Type de protolithe
  • tectonique

Références

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

p.78: Three units with distinct lithological assemblages of oceanic origin, situated in adjacent areas, form the Malenco-Forno-Lizun Nappe. The Malenco unit (Montrasio et al. 2005) consists of large volumes of serpentinite that represent exhumed subcontinental mantle formerly exposed at the ocean floor, and, in a small area adjacent to the Margna Nappe, a transition into continental lower crust in Permian granulite facies, associated with a Permian gabbroic intrusion (Müntener & Hermann 1996). Further north, the Forno unit consists of metabasalts and metagabbros of oceanic origin covered by metasedimentary rocks of Jurassic to Early Cretaceous age, which are in direct contact with the roof of the Bregaglia Intrusion (Puschnig 1998, Froitzheim et al. 1996 a). The Lizun unit, located around the Piz Lizun, northwest of the Engadine Fault and sinistrally offset from the Forno unit (Schmid & Froitzheim 1993), exposes same rocks of oceanic origin as in this latter unit (Liniger & Nievergelt 1990). The Malenco-Forno-Lizun Nappe, together with the Platta Nappe, is located in the hangingwall of the Turba Normal Fault (Nievergelt et al. 1996).

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