Bristenstock-Syenit
Back to Aar MassifRepresentation and status
- Index
- sigma-B
- Color CMYK
- (0%,60%,47%,16%)
- Color RGB
- R: 215 G: 105 B: 110
- Rank
- lithostratigraphic Formation
- Validity
- Unit is in Use
- Status
- informal term
Nomenclature
- Deutsch
- Bristenstock-Syenit
- Français
- Syénite du Bristenstock
- Italiano
- Sienite del Bristenstock
- English
- Bristenstock Syenite
- Origin of the Name
-
N-Seite des Bristenstocks = Bristen (UR) , zwischen Langlauiberg und Gemsplanggenstöckli
- Historical Variants
-
Hornblendesyenit des Bristenstocks, Bristenstock Syenite (Berger et al. 2017), Bristenstock-Syenit (Gisler 2018)
Hierarchy and sequence
- Superordinate unit
Age
- Age at top
-
- Middle Mississippian
- Age at base
-
- Middle Mississippian
- Dating Method
-
Ca. 304 Ma ? (Schaltegger, unpubl.). Intrusiv im Ofenhorn-Stampfhorn-Gneiskomplex.
Palaenography and tectonic
- Tectonic unit (resp. main category)
- Kind of protolith
-
- plutonic
- Metamorphism
- monocyclic
References
- Definition
-
(2017) :
Geological Map of the Aar Massif, Tavetsch and Gotthard Nappes. Geological Special Map 1:100'000, Explanatory Notes 129
p.37: In addition to the Giuv Syenite, other monzodioritic, quartz monzonitic and syenitic bodies occur in the eastern part of the Aar Massif. The Bristenstock Syenite, a fine- to medium-grained quartz-bearing hornblende syenite, intrudes the Ofenhorn-Stampfhorn Gneiss Complex of the Sustenhorn Zone north of the Central Aar Granite on the northwest face of the Bristenstock (JENNY 1973) in a tectonic position similar to the Tödi Granite Complex.