falda di Antigorio
Retour à nappe d'AntigorioReprésentation et statut
- Couleur CMYK
- N/A
- Couleur RGB
- R: 241 G: 239 B: 237
- Rang
- nappe
- Usage
- Ce terme est en usage.
- Status
- valide
- Discussion du statut
Nomenclature
- Deutsch
- Antigorio-Decke
- Français
- nappe d'Antigorio
- Italiano
- falda di Antigorio
- English
- Antigorio nappe
- Origine du nom
- Variantes historiques
-
Untere Gneissmasse = Antigori-Gneiss (Gerlach 1869), nappe I = Antigorio (Argand 1911b), Antigoriodecke (Bosshard 1925), Antigoriodecke bzw. Antigorioteildecke (Grütter 1929), Antigorio-Monte Leone-Decke (Günthert 1958), Falda Antigorio (Godenzi 1963), Antigorio-Gneismasse = Antigorio-Zone = Antigorio-Gneisszone (Wieland 1966), nappe n°1 = Antigorio nappe (Carrupt 2003), Antigorio recumbent fold (Steck 2008), Antigorio fold nappe (Steck et al. 2013), Falde di Antigorio (Della Torre & Maggini 2015)
Hiérarchie et succession
- Unités hiérarchiquement subordonnées
Âge
- Âge au sommet
-
- Paléogène
- Note sur le sommet
-
unsicher
- Âge à la base
-
- Cisuralien (= Permien précoce)
Géographie
- Extension géographique
- Alpi Lepontine: Val Divedro (Gondoschlucht), Valle Antigorio, Val Formazza, Val Bavona, Valle di Campo, Val di Vergeletto e Valle Onsernone.
- Région-type
- Valle Antigorio (Italia)
Références
- Définition
- 1869) : Die penninischen Alpen, Beiträge zur Geologie der Schweiz. Neue Denkschriften allg. Ges. ges. Natf. 23 (
- Révision
-
2013) :
Tectonics of the Lepontine Alps : ductile thrusting and folding in the deepest tetonic levels of the Central Alps. Swiss Journal of Geosciences, 106/3, 427-450
p.430: The Antigorio fold nappe in the Antigorio (Toce) and Devero valleys is composed of three granitoid intrusions: (a) the 296 ± 2 Ma old Antigorio tonalite, (b) the dominant middle to coarse grained 290 ± 4 Ma old Antigorio granodiorite and (c) the 289 ± 4 Ma old Antigorio granite (Bergomi et al. 2007). The Antigorio granitoids are farther east intrusive in an older polycyclic and migmatitic basement. The granodiorite is also intrusive in the Paleozoic Baceno schist of the Devero valley and the Verampio window. The Pioda di Crana gneiss is dominated by a strongly foliated middle to fine grained 301 ± 4 Ma old granite gneiss (Bergomi et al. 2007). Locally and especially near the contact with the higher Mergoscia zone, polycyclic micaschists and amphibolites are common. The granodioritic and tonalitic Alpigia hornblende-biotite gneiss, here attributed to the Antigorio nappe, exhibits a regular contact with the staurolite–kyanite–garnet–micaschist of the Campo Tencia unit of the Simano nappe (Keller et al. 1980; Steck 1998; Berger et al. 2005). This contact may be tectonic or intrusive.
(
-
zona della Pioda di Crana
- Name Origin
-
Pioda di Crana (Italia), Valle Vigezzo
- Rang
- unité lithostratigraphique délimitée tectoniquement
- Statut
- terme informel
- En bref
-
Denominazione della falda di Antigorio nel fianco superiore della grande struttura Wandfluhhorn-Bosa.
- Age
- Carbonifère tardif (= Pennsylvanien)