Tenelin-Gneiskomplex

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Representation and status

Index
P-T
Color CMYK
(12%,0%,15%,35%)
Color RGB
R: 145 G: 165 B: 140
Rank
lithostratigraphic Formation
Validity
Unit is in Use
Status
informal term

Nomenclature

Deutsch
Tenelin-Gneiskomplex
Français
Complexe gneissique du Piz Tenelin
Italiano
Complesso gneissico del Piz Tenelin
English
Tenelin Gneiss Complex
Origin of the Name

Piz Tenelin = Piz Tanelin (TI), Val Cadlimo

Historical Variants

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)

Hierarchy and sequence

Superordinate unit

Age

Age at top
  • Paleozoic
Age at base
  • Paleozoic

Palaenography and tectonic

Tectonic unit (resp. main category)
Kind of protolith
  • sedimentary
Metamorphism
polycyclic (Alpine and Variscan)
Metamorphic facies
  • greenschist facies (epizone)
  • amphibolite facies

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.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.
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