Engi-Granit

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

• Gärsthorn-Gneiskomplex

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.