Aar-Massiv
Retour à Massif de l'AarReprésentation et statut
- Couleur CMYK
- N/A
- Couleur RGB
- R: 241 G: 237 B: 239
- Rang
- massif montagneux
- Usage
- Ce terme est en usage.
- Status
- valide
Nomenclature
- Deutsch
- Aar-Massiv
- Français
- Massif de l'Aar
- Italiano
- Massiccio dell'Aare
- English
- Aar Massif
- Origine du nom
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Quellgebiet des Flusses Aare
- Variantes historiques
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massif de l'Aar (Argand 1911b), Massiccio dell'Aare (Godenzi 1963), Aar massive [sic] (Purdy & Stalder 1973), Aarmassiv s.str. (Büchi & Trümpy 1976), Aar Massif (Berger et al. 2017, Gouffon et al. 2024)
Hiérarchie et succession
- Unités hiérarchiquement subordonnées
Géographie
- Extension géographique
- Zwischen unteren Lötschental im Westen und Tödi bzw. Surselva im Osten.
Références
- Révision
-
(2024) :
Tectonic Map of Switzerland 1:500000, Explanatory notes. Federal Office of Topography swisstopo, Wabern
p.33: The Aar Massif and its autochthonous-parautochthonous sedimentary cover occupies a belt about 20 km wide and 160 km long in the central part of the Alps, between Sierre in Valais and Landquart in Graubünden. It is subdivided by several faults into a large External Aar Massif, making up almost the entire width of the Aar Massif in its central part, and a thinner Internal Aar Massif, which is subdivied into two submassifs: the Baldschieder-Gletsch Submassif, which crops out in upper Valais region, south of the Rote Kuh - Gampel Shear Zone – a reactivated paleofault – and its possible continuation between Aletsch and Rhône glaciers, and the Trun-Punteglias Submassif in the Surselva (Graubünden). North of the Lötschental, the External Aar Massif overthrusts the Gastern Submassif. The contact is marked by a thin band of Triassic and Jurassic sediments (the “Jungfrau Wedge”), which includes overturned sediments of the External Aar Massif. The entire Aar Massif is made up of a pre-Variscan to Variscan polycyclic metamorphic basement with Variscan intrusions. Several large-scale structures follow the general strike of the External Aar Massif. They include longitudinal faults and very tight synclines exposing Late Paleozoic and Mesozoic sediments.
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Externes Aar-Massiv
- Rang
- domaine tectonique
- Statut
- valide
- En bref
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The External Aar Massif is situated north of the Rote Kuh-Gampel Shear Zone and makes up almost the entire width of the Aar Massif in its central part. North of the Lötschental, it overthrusts the Gastern Submassif with a contact marked by a thin band of Triassic and Jurassic sediments («Jungfrau Wedge»), which includes overturned sediments of the External Aar Massif. Several large-scale structures follow the general strike of the External Aar Massif. They include longitudinal faults and very tight synclines exposing Late Paleozoic and Mesozoic sediments.
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Rote-Kuh–Gampel-Scherzone
- Name Origin
- Rang
- tectonique
- Statut
- terme informel
- En bref
-
The Rote Kuh-Gampel Shear Zone is a reactivated paleofault separating the External Aar Massif to the north-west from the Internal Aar Massif to the south-east.
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Internes Aar-Massiv
- Rang
- domaine tectonique
- Statut
- valide
- En bref
-
The Internal Aar Massif is restricted to a thin band situated south of the Rote Kuh-Gampel Shear Zone and its possible continuation between Aletsch and Rhône glaciers. It is subdivied into two submassifs: the Baltschieder-Gletsch Submassif in upper Valais region, and the Trun-Punteglias Submassif in the Surselva (Graubünden), with an autochthonous sedimentary cover preserved in part locally.
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Plammis Nappe
- Name Origin
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Plammis (VS), Alp oberhalb Varen
- Rang
- nappe
- Statut
- valide
- Nomenclatorial Remarks
- <p>(inkl. autochthone Sedimentbedeckung des internen Aar-Massivs)</p>
- En bref
-
The Plammis Nappe is a Lower Helvetic tectonic nappe of the Western Swiss Alps, constituted by a Jurassic sedimentary series interpreted as the detached part of the autochthonous cover of the Internal Aar Massif (Baldschieder-Gletsch Submassif). On the slopes between Sierre and Gampel, the Plammis Nappe overlies the autochthonous cover of the External Aar Massif and the Doldenhorn Nappe. It is itself overlain by the Jägerchrüz Nappe.
- Age
- Jurassique Moyen
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Raron-Synklinale
- Name Origin
- Rang
- tectonique
- Statut
- terme informel
- En bref
-
Gefaltete autochtone Sedimentbedeckung des internen Aar-Massivs.
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Baltschieder-Gletsch Submassif
- Name Origin
- Rang
- Sous-Période chronostratigraphique
- Statut
- terme local (informel)
- En bref
-
The Baltschieder-Gletsch Submassif represents the Internal Aar Massif in Valais. It crops out in upper Valais region, south of the Rote Kuh-Gampel Shear Zone – a reactivated paleofault – and its possible continuation between Aletsch and Rhône glaciers. The autochthonous cover of the Baldschieder-Gletsch Submassif is present at its southwestern end the near Raron.
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Ausserberg–Avat-Zone
- Name Origin
- Rang
- zone tectonique
- Statut
- valide
- Nomenclatorial Remarks
- <p>Entspricht die «Südliche Gneiszone».</p>
- En bref
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Prävariszisches polyzyklisches Altkristallin des internen Aar-Massivs südlich des Zentralen Aare-Granits bzw. des Südwestlichen Aare-Granits.
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Engi-Granit
- Name Origin
-
Engi (VS) im Obergoms
- Rang
- Formation lithostratigraphique
- Statut
- terme informel
- En bref
-
Stark deformierter porphyrischer alkalinischer Granit, der durch Migmatitisierung (Neosom) entstanden ist.
- Age
- Précambrien
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Gärsthorn-Gneiskomplex
- Name Origin
- Rang
- Formation lithostratigraphique
- Statut
- terme informel
- En bref
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Prävariszische polyzyklische granitische Gneise (Augengneis und grobkörniger Zweifeldspargneis) der Ausserberg-Avat-Zone.
- Age
- Précambrien
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Geimen-Augengneis
- Name Origin
- Rang
- unité lithostratigraphique
- Statut
- terme local (informel)
- En bref
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Lokaler grobporphyrischer Augengneis innerhalb der Ausserberg-Avat-Zone.
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Bitschji-Augengneis
- Name Origin
- Rang
- unité lithostratigraphique
- Statut
- terme local (informel)
- En bref
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Lokaler grauer granodioritischer Serizit-Augengneis innerhalb der Ausserberg-Avat-Zone.
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Sogn-Placi-Gneiskomplex
- Name Origin
- Rang
- Formation lithostratigraphique
- Statut
- terme informel
- En bref
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Prävariszische polyzyklische metasedimentäre Gneise (Meta-arkose, Metapsammite, Schiefer und Zweiglimmer-Phyllit) der östliche Ausserberg-Avat-Zone.
- Age
- Protérozoïque
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Massa-Gneiskomplex
- Name Origin
- Rang
- Formation lithostratigraphique
- Statut
- terme informel
- En bref
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Prävariszische polyzyklische Migmatite und migmatitische Gneise der Ausserberg-Avat-Zone. Leukokratische migmatitische Gneise treten häufig mit mafische bis ultramafische Gesteine (Amphibolite, Gabbros, Hornblendite) zusammen und verleihen der Einheit ein gebändertes Aspekt.
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Pulanera-Gneiskomplex
- Name Origin
- Rang
- unité lithostratigraphique
- En bref
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Feinkörniger Biotitgneis bis -schiefer der östliche Ausserberg-Avat-Zone, z.T. gebändert, lokal migmatitisch.
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Trun-Punteglias-Teilmassiv
- Name Origin
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Val Punteglias (GR), nördlich von Trun
- Rang
- unité tectonique
- Statut
- valide
- En bref
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The Trun-Punteglias Submassif represents the Internal Aar Massif in the Surselva (Graubünden), with an autochthonous cover only comprising Triassic sediments.