Val-Lavaz-Gruppe (spätvariszische Intrusiva)
Back to Gotthard NappeRepresentation and status
- Color CMYK
- (0%,47%,55%,4%)
- Color RGB
- R: 245 G: 130 B: 110
- Rank
- lithostratigraphic Group
- Validity
- Unit is in Use
- Status
- informal term
Nomenclature
- Deutsch
- Val-Lavaz-Gruppe (spätvariszische Intrusiva)
- Français
- Groupe du Val Lavaz
- Italiano
- Gruppo della Val Lavaz
- English
- Val Lavaz Group
- Origin of the Name
- Historical Variants
-
Ältere Granite (Spillmann et al. 2011), Postvariszische Intrusiva [sic] (Vögeli et al. 2013), Val Lavaz Group (Berger et al. 2017)
Hierarchy and sequence
- Subordinate units
Age
- Age at top
-
- Asselian
- Age at base
-
- Late Carboniferous (= Pennsylvanian)
Palaenography and tectonic
-
- Variscan plutonic rocks of the Helvetic
- Paleogeography
- European continental plate
- Tectonic unit (resp. main category)
- Kind of protolith
-
- plutonic
References
- Definition
-
(2017) :
Geological Map of the Aar Massif, Tavetsch and Gotthard Nappes. Geological Special Map 1:100'000, Explanatory Notes 129
p.72: The Uffiern Diorite, the Cristallina Granodiorite and the Medel Granite constitute a single coherent plutonic complex towards the eastern end of the Gotthard Nappe. The Medel Granite is coarse-grained and locally porphyric, while the Cristallina Granodiorite is more fine-grained and equigranular. MERZ (1989) described the petrographic and structural characteristic of both units. VÖGELI et al.(2013) described the small occurrence of the Uffiern Diorite. The Medel Granite envelops the northern and the western part of the complex, whereas the Cristallina Granodiorite occupies the centre and the southern part. The roughly north–south oriented western intrusive contact of the Medel Granite perpendicularly crosscuts the steeply east–west oriented structures of the polycyclic metamorphic basement (Ausserbinn-Piz Cavel Zone) as well as the pre- to early Variscan metasedimentary and volcaniclastic sequences of the Val Rondadura Group. This is one of the important observations that allowed the reconstruction of the pre-Alpine evolution of the Gotthard Nappe (see MERCOLLI et al.1994 and references therein).
-
Gamsboden-Granit
- Name Origin
-
Gamsboden (UR), Hospental
- Rank
- lithostratigraphic Formation
- Status
- informal term
- In short
-
Spätvariszischer, heller, mittel- bis grobkörniger Zweiglimmer-Augengneis der nördliche zentrale Gotthard-Decke, mit grossen Alkalifeldspäten.
- Age
- Late Carboniferous (= Pennsylvanian)
-
Granito della Fibbia
- Name Origin
-
La Fibbia (TI), Gipfel 4,5 km WNW Airolo
- Rank
- lithostratigraphic Formation
- Status
- informal term
- Nomenclatorial Remarks
- <p>Gotthardgranit (s.s.) auct.</p>
- In short
-
Spätvariszischer, heller, mittel- bis grobkörniger Zweiglimmer-Augengneis der südliche zentrale Gotthard-Decke, mit grossen Alkalifeldspäten.
- Age
- Late Carboniferous (= Pennsylvanian)
-
Medel-Granit
- Name Origin
- Rank
- lithostratigraphic Formation
- Status
- informal term
- In short
-
Intrusione granitica tarda- fino a postvarisca della falda Gottardo orientale: granito grossolano, porfirico fino gneiss granitico grigio-chiaro, localmente scistoso.
- Age
- Early Permian
-
Cristallina-Granodiorit
- Name Origin
- Rank
- lithostratigraphic Formation
- Status
- informal term
- In short
-
Granodiorite tardo- fino a postvarisco della falda Gottardo orientale, mesocratica, scistoso-fusolare.
- Age
- Late Carboniferous (= Pennsylvanian)
-
Uffiern-Diorit
- Name Origin
-
Umgebung der Fassungsanlage Bucca di Uffiern (GR), im wetlischen Val Uffiern (Seitental der Val Cristallina)
- Rank
- lithostratigraphic Formation
- Status
- informal term
- In short
-
Spätvariszischer, dunkler, mittelkörniger, massiger quarzführender Hornblende-Biotit-Diorit der östliche Gotthard-Decke.
- Age
- Late Carboniferous (= Pennsylvanian)