Nappe du Ruitor
Representation and status
- Index
- Ru / RUI
- Color CMYK
- N/A
- Color RGB
- R: 241 G: 239 B: 237
- Rank
- nappe
- Validity
- Unit is in Use
- Status
- valid
Nomenclature
- Deutsch
- Ruitor-Decke
- Français
- Nappe du Ruitor
- Italiano
- Falda del Ruitor
- English
- Ruitor Nappe
- Origin of the Name
- Historical Variants
-
Ruitor Massif (Elter 1960, Caby 1968, Caby 1974, Govi 1975, Baudin 1987), gneiss granitiques du Ruitor / complexe des gneiss du Ruitor (Zulauf 1963), Zone du Ruitor (Burri 1983), série du Ruitor (Détraz 1984), Zona brianzonese esterna = zoccolo polimetamorfico del Ruitor (Dal Piaz et al. 1992a), zone du Ruitor (Gouffon 1993), Ruitor unit (Malusà et al. 2005), Ruitor Nappe (TK500, Gouffon et al. 2024)
Description
- Description
-
Nappe constituée d'un socle polymétamorphique ancien (micaschistes gris, paragneiss albitiques, métabasites et gneiss oeillés leucocrates à feldspath potassique).
Gneiss du coeur polymétamorphique de la nappe des Pontis (REF) ; socle de la Zone Houillère (Détraz 1984) ; ...
Hierarchy and sequence
- Subordinate units
Geography
- Geographical extent
- France, Italie, Suisse (vallée de Bagnes, vallée d'Entremont, val d'Hérens).
References
- Definition
-
(2024) :
Tectonic Map of Switzerland 1:500000, Explanatory notes. Federal Office of Topography swisstopo, Wabern
p.64: The Ruitor Nappe extends from the Valle d’Aosta (southern edge of the map) into the Val de Bagnes, where it pinches out between the Zone Houillère and the Siviez-Mischabel Nappe. In the Valle d’Aosta, the Ruitor nappe becomes thinner to the north of the Col de Bard Fault (see p. 63), while it is much wider immediately to the south of this fault, where it is split in two parts by an isoclinal synform (Avise) with a core attributed to the Tsaté Nappe. The Ruitor Nappe is characterized by a polycyclic basement with numerous pre-Alpine relics. Permian clastic rocks cover this basement and are in contact with the Permian cover of the Siviez-Mischabel Nappe; therefore, the tectonic contact that separates these two nappes is rarely recognizable in the field. The polycyclic basement of the Ruitor Nappe overlies the Permian metasediments of the Zone Houillère.
-
Orthogneiss du Mont Flassin
- Name Origin
-
Mont de Flassin (Italia), Saint Rhémy / Val d'Aoste
- Rank
- lithostratigraphic Formation
- Status
- unknown status
- In short
- Complexe magmatique constitué d'orthogneiss grossiers hololeucocrates à mésocrates monométamorphiques au sein du socle polymétamorphique de la zone du Ruitor.
- Age
- Late Carboniferous (= Pennsylvanian)
-
Orthogneiss de Vedun
- Name Origin
-
Village de Vedun (Italia), Valle d'Aosta
- Rank
- lithostratigraphic unit
- Status
- local name (informal)
- In short
- Gneiss leucocrate de grain grossier à moyen, dont la patine claire passe au beige ou au verdâtre lorsque les micas blancs deviennent abondants.