Guttannen-Gneiskomplex
Back to Aar massifRepresentation and status
- Index
- G-G
- Color CMYK
- (0%,16%,16%,2%)
- Color RGB
- R: 250 G: 190 B: 175
- Rank
- lithostratigraphic Formation
- Validity
- Unit is in Use
- Status
- informal term
Nomenclature
- Deutsch
- Guttannen-Gneiskomplex
- Français
- Complexe gneissique de Guttannen
- Italiano
- Complesso gneissico di Guttannen
- English
- Guttannen Gneiss Complex
- Origin of the Name
- Historical Variants
-
Gneiss von Guttannen (Fellenberg & Schmidt 1898), Paragneise der Zone von Guttannen, Guttannen Zone (Abrecht & Schaltegger 1988), Guttannen Gneiss Complex (Berger et al. 2017)
Description
- Description
-
Biotitgneis und Bändergneis, uneinheitlich ausgebildet, oft migmatisch und mit ptygmatischer Verfältelung; aplitische Mobilisate mit dunklen Feldspäten; Biotit-Sericit-Schiefer mit Relikten von Amphibolit und Quarzit.
Age
- Age at top
-
- Paleozoic
- Age at base
-
- Precambrian
Palaenography and tectonic
-
- Pre-Variscan polycyclic basement of the Helvetic
- Paleogeography
- European Continent
- Tectonic unit (resp. main category)
References
- Definition
-
2017) :
Geological Map of the Aar Massif, Tavetsch and Gotthard Nappes. Geological Special Map 1:100'000, Explanatory Notes 129
p.28: The Guttannen Gneiss Complex best represents the typical rock associations of the Ferden-Guttannen Zone. Biotite-chlorite and chlorite-sericite schists dominate in the “Guttannen Zone” of ABRECHT & SCHALTEGGER (1988), called here the Guttannen Gneiss Complex. These greenschist-facies mineral assemblages overprint higher-grade parageneses (e.g., sericite after sillimanite). Towards the southern border of the gneiss complex, the retrograde alteration gradually diminishes and the original migmatitic character appears (ABRECHT 1994).
(