Falda di Antrona

Back to Antrona nappe

Representation and status

Index
An
Color CMYK
N/A
Color RGB
R: 241 G: 239 B: 237
Rank
nappe
Validity
Unit is in Use
Status
valid

Nomenclature

Deutsch
Antrona-Decke
Français
Nappe d'Antrona
Italiano
Falda di Antrona
English
Antrona Nappe
Origin of the Name

Antronapiana (Italia)

Historical Variants

Antrona-Schieferstreifen (Gerlach 1869), Antrona-Synklinal (Gerlach 1880), branche d'Antrona (Argand 1911b), Muldenzone von Antrona = Antrona-Mulde (1952), Antrona-Mulde (Bearth 1956, Bearth 1957, Müller 1976), Mulde von Antrona (Bearth 1973), Zona di Antrona (Dal Piaz et al. 1992), nappe d'Antrona (Carrupt & Schlup 1998), Antrona ophiolitic nappe (Bill et al. 2001), Antrona unit (Keller et al. 2005), Antrona ophiolite nappe = Antrona unit (Steck et al. 2015)

Geography

Geographical extent
Laggintal, Zwischbergental, Valle di Bognanco, Valle d'Antrona, Valle Anzasca.
Type area
Valle d'Antrona (Italia)

Palaenography and tectonic

Paleogeography
Piemont Basin
Tectonic unit (resp. main category)
Kind of protolith
  • sedimentary
  • ophiolitic
Metamorphism
monocyclic-polyphase
Metamorphic facies
  • greenschist facies (epizone)
  • amphibolite facies
  • eclogite facies
Note on metamorphism

éclogitisation éoalpine (glaucophane, barroisite, omphacite), puis évolution rétrograde avec brève remontée en température mésoalpine (Carrupt & Schlup 1998)

References

Definition
Pfeifer H.R., Colombi A., Ganguin J. (1989) : Zermatt-Saas and Antrona Zone : a petrographic and geochemical comparison of polyphase metamorphic ophiolites of the West- Central Alps. Schweiz. Min. Petr. Mitt. 69/2, 217-236
Back to top