Aar-Massiv
Torna a Massiccio dell'AarRappresentazione e statuto
- Colore CMYK
- N/A
- Colore RGB
- R: 241 G: 237 B: 239
- Rango
- massiccio di montagne
- Uso
- Unità in uso.
- Status
- valido
Nomenclatura
- Deutsch
- Aar-Massiv
- Français
- Massif de l'Aar
- Italiano
- Massiccio dell'Aare
- English
- Aar Massif
- Origine del nome
-
Quellgebiet des Flusses Aare
- Varianti storiche
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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)
Gerarchia e successione
- Unità di rango inferiore
Geografia
- Estensione geografica
- Zwischen unteren Lötschental im Westen und Tödi bzw. Surselva im Osten.
Referenze
- Revisione
-
(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
- Rango
- dominio tettonico
- Statuto
- valido
- In breve
-
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
- Rango
- tettonica
- Statuto
- termine informale
- In breve
-
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
- Rango
- dominio tettonico
- Statuto
- valido
- In breve
-
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
- Rango
- falda
- Statuto
- valido
- Nomenclatorial Remarks
- <p>(inkl. autochthone Sedimentbedeckung des internen Aar-Massivs)</p>
- In breve
-
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
- Giurassico Medio
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Raron-Synklinale
- Name Origin
- Rango
- tettonica
- Statuto
- termine informale
- In breve
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Gefaltete autochtone Sedimentbedeckung des internen Aar-Massivs.
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Baltschieder-Gletsch Submassif
- Name Origin
- Rango
- Sotto-Periodo cronostratigrafico
- Statuto
- termine locale (informale)
- In breve
-
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
- Rango
- zona tettonica
- Statuto
- valido
- Nomenclatorial Remarks
- <p>Entspricht die «Südliche Gneiszone».</p>
- In breve
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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
- Rango
- Formazione litostratigrafica
- Statuto
- termine informale
- In breve
-
Stark deformierter porphyrischer alkalinischer Granit, der durch Migmatitisierung (Neosom) entstanden ist.
- Age
- Precambriano
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Gärsthorn-Gneiskomplex
- Name Origin
- Rango
- Formazione litostratigrafica
- Statuto
- termine informale
- In breve
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Prävariszische polyzyklische granitische Gneise (Augengneis und grobkörniger Zweifeldspargneis) der Ausserberg-Avat-Zone.
- Age
- Precambriano
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Geimen-Augengneis
- Name Origin
- Rango
- unità litostratigrafia
- Statuto
- termine locale (informale)
- In breve
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Lokaler grobporphyrischer Augengneis innerhalb der Ausserberg-Avat-Zone.
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Bitschji-Augengneis
- Name Origin
- Rango
- unità litostratigrafia
- Statuto
- termine locale (informale)
- In breve
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Lokaler grauer granodioritischer Serizit-Augengneis innerhalb der Ausserberg-Avat-Zone.
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Sogn-Placi-Gneiskomplex
- Name Origin
- Rango
- Formazione litostratigrafica
- Statuto
- termine informale
- In breve
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Prävariszische polyzyklische metasedimentäre Gneise (Meta-arkose, Metapsammite, Schiefer und Zweiglimmer-Phyllit) der östliche Ausserberg-Avat-Zone.
- Age
- Proterozoico
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Massa-Gneiskomplex
- Name Origin
- Rango
- Formazione litostratigrafica
- Statuto
- termine informale
- In breve
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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
- Rango
- unità litostratigrafia
- In breve
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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
-
Val Punteglias (GR), nördlich von Trun
- Rango
- unità tettonica
- Statuto
- valido
- In breve
-
The Trun-Punteglias Submassif represents the Internal Aar Massif in the Surselva (Graubünden), with an autochthonous cover only comprising Triassic sediments.