Ötztal-Bundschuh-Deckensystem
Representation and status
- Color CMYK
- N/A
- Color RGB
- R: 241 G: 239 B: 237
- Rank
- nappe complex
- Validity
- Unit is in Use
- Status
- informal term
Nomenclature
- Deutsch
- Ötztal-Bundschuh-Deckensystem
- Français
- Système de nappes de l'Ötztal-Bundschuh
- Italiano
- Sistemo di falde dell'Ötztal-Bundschuh
- English
- Ötztal-Bundschuh Nappe System
- Historical Variants
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Ötztal-Bundschuh-Deckensystem (Gruber et al. 2010), Ötztal-Bundschuh Nappe Complex (TK500 / Gouffon et al. 2024)
Hierarchy and sequence
- Subordinate units
References
- Definition
-
(2024) :
Tectonic Map of Switzerland 1:500000, Explanatory notes. Federal Office of Topography swisstopo, Wabern
p.90: In Austria, tectonic units are generally grouped into nappe systems; this is not the case in this map. This effects the following nappes: 1) The Silvretta-Seckau Nappe System comprises the Languard, S-charl - Sesvenna and Silvretta nappes as well as the Campo Nappe Complex, 2) the tectonically higher Ötztal-Bundschuh Nappe System is represented only by the Ötztal Nappe Complex, 3) although the Tonale Nappe lacks a Mesozoic cover, it is attributed to the still higher Drauzug-Gurktal Nappe System which is not affected by the Alpine metamorphic overprint (Schmid et al. 2004). Note that the Silvretta Nappe, the S-charl - Sesvenna Nappe and the Campo Nappe Complex, all being part of the Silvretta-Seckau Nappe System, essentially occupy the same position within the Upper Austroalpine nappe stack (Froitzheim et al. 1994). Other units, consisting predominantly of cover sequences detached from the S-charl - Sesvenna Nappe and the Campo Nappe Complex (Ortler and Quattervals nappes, Umbrail-Terza Slice Complex), are transported towards the WNW, below the advancing Ötztal Nappe Complex (Froitzheim et al. 1994, Conti 1997, Trümpy et al. 1997).
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Ötztal-Deckenkomplex
- Name Origin
- Rank
- nappe
- Status
- valid
- In short
-
The Ötztal Nappe Complex is an Upper Austroalpine tectonic unit spanning the Austria-Italy border southwest of Innsbruck. In Switzerland, only two lithologically and tectonically distinct units occur: the main Ötztal Nappe (polymetamorphic paragneisses with minor orthogneisses and amphibolites) and the smaller, overlying Matsch Nappe (characteristic polymetamorphic association of interlayered metapelites, amphibolites and pegmatites).
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Matsch-Decke
- Name Origin
- Rank
- nappe
- Status
- valid
- In short
-
The Matsch Nappe differs from the underlying Ötztal Nappe in that it is built up of a characteristic polymetamorphic (Variscan, Permian and Alpine) association of interlayered metapelites, amphibolites and pegmatites. Manifestations of Permian metamorphism, associated with the intrusion of pegmatites, are absent in the Ötztal Nappe, and hence thrusting of the Matsch Nappe over the Ötztal Nappe must be of early Alpine age, predating emplacement and metamorphism within the Ötztal Nappe Complex at around 90 Ma.
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Ötztal-Decke
- Rank
- nappe
- Status
- valid
- In short
-
The Ötztal Nappe forms the main part of the Ötztal Nappe Complex. It consists mainly of polymetamorphic paragneisses with minor orthogneisses and amphibolites.