Uffiern-Diorit
Back to Gotthard nappeRepresentation and status
- Index
- delta-U
- Color CMYK
- (0%,48%,56%,6%)
- Color RGB
- R: 240 G: 125 B: 105
- Rank
- lithostratigraphic Formation
- Validity
- Unit is in Use
- Status
- informal term
- Status discussion
Nomenclature
- Deutsch
- Uffiern-Diorit
- Français
- Diorite du Val Uffiern
- Italiano
- Diorite della Val Uffiern
- English
- Uffiern Diorite
- Origin of the Name
-
Umgebung der Fassungsanlage Bucca di Uffiern (GR), im wetlischen Val Uffiern (Seitental der Val Cristallina)
- Historical Variants
-
Diorit des Val Ufirn (Grubenmann 1892), Diorit der Val Ufiern = Ufierndiorit (Winterhalter 1930), Ufiern-Diorit = Ufirn Diorit (Rutsch et al. 1966), Ufiern-Sädelhorndiorit, Uffien diorite (Mercolli et al. 1994), Uffiern-Diorit (Vögeli et al. 2013)
Hierarchy and sequence
- Superordinate unit
Age
- Age at top
-
- Early Permian
- Age at base
-
- Late Carboniferous (= Pennsylvanian)
Geography
- Geographical extent
- Östliches Gotthardmassiv.
- Type locality
-
-
Bucca digl Uffiern (GR)
Site particularities- typische Fazies
- historische Fundstelle
- Strassenanschnitt / Bahnanschnitt
- (2709500 / 1161200)
- Heim 1891, Vögeli et al. 2013
-
Bucca digl Uffiern (GR)
- Point of interest
-
-
Tuors (GR)
Site particularities- typische Fazies
- Grat
- (2709080 / 1160200)
- Vögeli et al. 2013
-
Tuors (GR)
Palaenography and tectonic
- Tectonic unit (resp. main category)
- Kind of protolith
-
- plutonic
- Metamorphism
- monocyclic
References
- Definition
-
(1891) :
Geologie der Hochalpen zwischen Reuss und Rhein. Mit einem Anhang von Petrogr. Beiträgen von C. Schmidt. Beitr. Geol. Karte Schweiz 25, 605 Seiten
R. Müller und E. Niggli in: Rutsch et al. 1966: UFIERN-DIORIT (= Ufirn Diorit = Uffiern-Diorit) (Jungpaläozoikum ; Gotthardmassiv): Alb. Heim (1891) in: Geologie der Hochalpen zwischen Reuss und Rhein. Beitr. geol. Karte Schweiz. 25: 226. Kleiner Dioritstock (0.5 auf 1 km) des östlichen Gotthardmassivs nach R. U. Winterhalter (1930) innerhalb des südlichen Cristallina-Granodiorits (>>>) liegend. Nach der Val Ufiern benannt (= Val Uffiern der LK 256, 711000/161300, Seitental der Val Cristallina). Mittelkörniger, massiger quarzführender Hornblende-Biotit-Diorit, mit normaldioritischem Chemismus. Literatur: Alb. Heim (1891), C. Schmidt (1891: 25), U. Grubenmann (1892: 139-142), R. U. Winterhalter (1930: 77-82).
- Definition
-
(2017) :
Geological Map of the Aar Massif, Tavetsch and Gotthard Nappes. Geological Special Map 1:100'000, Explanatory Notes 129
p.72: 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).