Engi-Granit

Back to Aar massif

Representation and status

Color CMYK
(0%,44%,56%,12%)
Color RGB
R: 225 G: 125 B: 100
Rank
lithostratigraphic Formation
Validity
Unit is in Use
Status
informal term

Nomenclature

Deutsch
Engi-Granit
Français
Granite d'Engi
Italiano
Granito di Engi
English
Engi Granite
Origin of the Name

Engi (VS) im Obergoms

Historical Variants

Engi-Granit (Bl. Urseren), Engi Granite (Berger et al. 2017)

Description

Description

... mit Titanit-Biotit-Gneis / Syenit-Restit.

Thickness
Max. ca. 700 m breite Zone.

Hierarchy and sequence

Superordinate unit

Age

Age at top
  • Paleozoic
Age at base
  • Precambrian
Dating Method

Intrusiv im Ausserberg-Avat-Zone.

Geography

Geographical extent
Ca. 7 km lange Linse zwischen Ulrichen und Bidmer (südöstlich Gletsch) am südlichen Rand des Aar-Massivs.
Type locality
  • Engi (VS) im Obergoms
    Site particularities
    • typische Fazies
    Site accessibility
    • Steinbruch, Tongrube
    Coordinates
    • (2669600 / 1155200)

References

Definition
Berger Alfons, Mercolli Ivan, Herwegh Marco, Gnos Edwin (2017) : Geological Map of the Aar Massif, Tavetsch and Gotthard Nappes. Geological Special Map 1:100'000, Explanatory Notes 129

p.83: This granite intrudes the surrounding migmatitic and metasedimentary gneisses of the Ausserberg-Avat Zone at the southern border of the Aar Massif (Niggli 1965). Niggli (1965) interpreted the syenitic rocks as cumulates or as relics of an earlier intrusion. The intrusive relationships with the rocks of the Ausserberg-Avat Zone suggest a Variscan age and its alkaline composition an affinity to the plutonic rocks of the Rötifirn Group. Intense deformation of unknown age overprints the Engi Granite.
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