Haslital-Gruppe (spät- bis postvariszische Intrusiva)

Rappresentazione e statuto

Colore CMYK

(0%,42%,51%,12%)

Colore RGB

R: 225 G: 130 B: 110

Rango

Gruppo litostratigrafico

Uso

Unità in uso.

Status

termine informale

Nomenclatura

Deutsch

Haslital-Gruppe (spät- bis postvariszische Intrusiva)

Français

Groupe du Haslital

Italiano

Gruppo del Haslital

English

Haslital Group

Origine del nome

Haslital (BE), Guttannen

Varianti storiche

Group C (Schaltegger 1994), Grimselgranit-Komplex (Labhart 2007), Jüngere Granite (Spillmann et al. 2011), Late to post-Variscan plutonic rocks = Haslital Group (Berger et al. 2017), ZAGR-Clan

Gerarchia e successione

Unità di rango inferiore

• Mittagflue-Granit
• Hinterbalm-Granit
• Balmenegg-Granit
• Zentraler Aare-Granit
• Telltistock-Granit
• Südwestlicher Aare-Granit
• Strem-Granit
• Grimsel-Granodiorit
• Rossbodenstock-Diorit

Età

Geomorfologia

• Sakmarian

Età alla base

• Gzhelian

Referenze

Definizione

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.49: The Haslital Group (Tab. 2) was defined as the association of granitoid bodies forming a temporally and genetically coherent group, which intruded mainly during Asselian times (299– 295 Ma), i.e., at the Carboniferous /Permian boundary (Fig. 4). These plutonic rocks belong to a calc-alkaline to sub-alkaline granitoid suite (SCHALTEGGER 1994). The Haslital Group corresponds to “Group C” of SCHALTEGGER (1994, see also SCHNEEBERGER et al. 2016). Volumetrically, this group represents the largest association of Variscan plutonic rocks in the area covered by the map sheet. They intrude the polycyclic metamorphic basement of the Aar Massif as documented by primary magmatic intrusive contacts crosscutting the pre-Permian structures (Fig. 8). The Haslital Group comprises the Grimsel Granodiorite, Southwestern Aar Granite, the Central Aar Granite, the Mittagflue Granite and the Gastern Granite.
The plutonic rocks of the Haslital Group have suffered different degrees of Alpine deformation, wheras the Gastern Granite is only slightly affected by Alpine deformation. Other members frequently show a gneissic structure. In the Haslital, the Alpine deformation is most intense in the central section of the Central Aar Granite, with increasing strain gradient towards the Grimsel Granodiorite, which represents the most strongly deformed rock type (WEHRENS 2015, SCHNEEBERGER et al. 2016, WEHRENS et al. 2017).

Materiale e vario