Diechtergletscher-Formation

Représentation et statut

Index

hD

Couleur CMYK

40 / 20 / 40 / 0

Couleur RGB

R: 160 G: 180 B: 140

Rang

Formation lithostratigraphique

Usage

Ce terme est en usage.

Status

terme informel

Nomenclature

Deutsch

Diechtergletscher-Formation

Français

Formation du Diechtergletscher

Italiano

Formazione del Diechtergletscher

English

Diechtergletscher Formation

Origine du nom

Diechtergletscher (BE), Guttannen

Variantes historiques

N.N. (Fischer 1905), Diechtergletscher-Formation (Schenker 1986b, Schenker 1987, Labhart & Renner 2012), Diechtergletscher Formation (Berger et al. 2017)

Hiérarchie et succession

Unités hiérarchiquement subordonnées

• Maasplanggstock-Metaandesit
• Garwiidi-Diorit

Âge

Âge au sommet

• Pennsylvanien tardif

Âge à la base

• Pennsylvanien tardif

Géographie

Extension géographique

Ofenhoren - Gwächtenhoren - Triftstöckli.

Paléogéographie et tectonique

Paléogéographie

continent européen

Termes génériques

• Aar

Références

Définition

Schenker Franz (1986) : Spätpaläozoischer saurer Magmatismus und Beckenbildung im Aar-Massiv unter kompressiver Tektonik. Diss. Univ. Bern

Révision

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.43: SCHENKER (1986), SCHENKER & ABRECHT (1987) and OBERHÄNSLI et al.(1988) described in detail the stratigraphic characteristics of the Diechtergletscher Formation and its relationships with the Central Aar Granite (Fig.6). SCHENKER & ABRECHT (1987) illustrated the thermal effect of the intrusion on the metasedimentary and volcanic rocks of the Diechtergletscher Formation (Fig.7b). Biotite-garnet and andalusite-biotite-muscovite parageneses in the clay member indicate temperatures far higher than the regional Alpine metamorphism in this area and are therefore interpreted as a contact aureole produced by the intrusion of the Central Aar Granite.
OBERHÄNSLI et al.(1988) associated the Diechtergletscher Formation to older sequences in the Cavardiras area (the Cavardiras Group of the present map sheet, see Tab. 2 and p. 33). These authors attributed small isoclinal folds to a Variscan deformation event, similar to that affecting the rocks of the Cavardiras Group. These deformed sedimentary rocks were then later affected by the intrusion of the Central Aar Granite. As deformation is extremely heterogeneous in all the Carboniferous rocks, the deformation argument was not taken into account. Therefore, the Diechtergletscher Formation was included in the Diechtergletscher-Tscharren Zone.