Tenelin-Gneiskomplex

Représentation et statut

Index

P-T

Couleur CMYK

(12%,0%,15%,35%)

Couleur RGB

R: 145 G: 165 B: 140

Rang

Formation lithostratigraphique

Usage

Ce terme est en usage.

Status

terme informel

Nomenclature

Deutsch

Tenelin-Gneiskomplex

Français

Complexe gneissique du Piz Tenelin

Italiano

Complesso gneissico del Piz Tenelin

English

Tenelin Gneiss Complex

Origine du nom

Piz Tenelin = Piz Tanelin (TI), Val Cadlimo

Variantes historiques

Mulde im Cadlimogneis (Krige 1918), Tenelinzone (Huber 1943), Tenelin zone (Beffa 1993), Zone des Piz Tenelin (Mercolli et al. 1994), Tenelin-Zone (Labhart & Renner 2012), Tenelin Gneiss Complex (Berger et al. 2017)

Hiérarchie et succession

Unité hiérarchiquement supérieure

• Streifengneis-Komplex

Âge

Âge au sommet

• Paléozoïque

Âge à la base

• Paléozoïque

Paléogéographie et tectonique

Termes génériques

• Gotthard

Type de protolithe

• sédimentaire

Métamorphisme

polycyclique (alpin et varisque)

Faciès métamorphique

• faciès à schistes verts (épizone)
• faciès à amphibolites

Références

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.70: The Borel, Tenelin, Laiets and Giubine Gneiss Complexes constitute four thin, concordant intercalations of garnet-mica schist, hornblende-garnet-mica schist (“Hornblendegarbenschiefer”), calcite-bearing mica schist, amphibolite and quartzite within the units of the polycyclic metamorphic basement. While the Borel and Tenelin Gneiss Complexes form two coherent bands, which can be followed from the Pizzo Centrale area to the Lukmanierpass, the Laiets Gneiss Complex splits into three branches east of the Cristallina Granodiorite (VÖGELI et al. 2013). HUBER (1943) described the petrography and structures of the Borel and Tenelin Gneiss Complexes, whereas WINTERHALTER (1930) treated those of the Laiets Gneiss Complex. HAFNER (1958) and STEIGER (1962) mapped and described a “Giubine-Serie” from the Val Bedretto to the Lukmanierpass. MERCOLLI et al. (1994) outlined the lithological differences in the “Giubine-Serie” and proposed to split it into two branches. Following these authors, the western branch (from Val Bedretto to the region of the Lago della Sella), consisting of migmatitic gneisses, was assigned to the Paradis Gneiss Complex. In contrast, the eastern branch (from the Piz Giübin to the Pizzo dell’Uomo) comprises metasedimentary garnet-mica schist similar to that of the Tenelin and Borel Gneiss Complexes (STEIGER 1962). Therefore, the eastern branch is reported on the map sheet as the Giubine Gneiss Complex, representing a part of the Val Rondadura Group.
OBERHOLZER (1955) described a suite of discontinuous quartzite layers of a few metres thickness in the “Streifengneis” Complex west of the Rotondo Granite. These layers can be followed over a length of few kilometres and could probably represent a western continuation (at least geometrically) of the Borel and Tenelin Gneiss Complexes (MERCOLLI et al.1994). These quartzite layers are not depicted on the present map sheet.