Paradis-Gneiskomplex

Back to Gotthard nappe

Representation and status

Index
GM-Au
Color CMYK
(0%,24%,30%,2%)
Color RGB
R: 250 G: 190 B: 175
Rank
lithostratigraphic unit
Validity
Unit is in Use
Status
informal term

Nomenclature

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

Piz Paradis (GR), Tujetsch

Historical Variants

(Homogene) Mischgneise auct., Mischgneis (Huber 1943, Niggli 1944), chorismatische Gneise auct., Injektionsgneise auct., Schmitzengneise, streifige Gneise p.p., Injektionsgneise p.p., Glimmerplagioklasgneise = Paradisgneise (Huber 1943a), Paradis-Gneis, Paradis Gneiss (von Raumer et al. 1993a), Migmatic gneiss unit = Paradisgneis (Mercolli et al. 1994), Prävariszische Migmatitgneise = Migmatitgneis des Val Medel (Vögeli et al. 2013), Paradis Gneiss Complex (Berger et al. 2017)

Description

Description

Mercolli et al. 1994: A particular typ of gneiss, associated with the migmatitic gneisses has been reporterd by Huber (1943) as "Paradisgneis". It is a rather massive mic-plagioclase gneiss, showing only a weak foliation and containing centimetric to decimetric inclusions of gneisses, amphibolites, quartz nodules and calc-silicate rocks.

Hierarchy and sequence

Subordinate units

Age

Age at top
  • Cambrian
Age at base
  • Precambrian
Dating Method

Protolit: Precambrien - Cambrien.

Palaenography and tectonic

  • Pre-Variscan polycyclic basement of the Helvetic
Paleogeography
European Continent
Tectonic unit (resp. main category)
Kind of protolith
  • sedimentary
Metamorphism
polycyclic
Metamorphic facies
  • amphibolite facies
  • granulite facies
  • eclogite facies
Note on facies

Eklogit- und Granulit-Fazies (prae-Ordoviz), sowie Amphibolit-Fazies (variszisch).

References

Definition
Huber Heinrich M. (1943) : Physiographie und Genesis der Gesteine im südöstlichen Gotthardmassiv Schweiz. Min. Petr. Mitt. 23, 72-260
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.64: The Paradis Gneiss Complex consists of a large variety of migmatitic gneisses showing different degrees of partial melting and resulting in a wide range of textures(*). Again, a number of local names were used to designate these migmatitic rocks (see Tab. 3). HUBER (1943) and NIGGLI (1944) described them very carefully and interpreted them correctly, but systematically omitted the term “migmatite”. Frequent gradual transitions between the metasedimentary Val Nalps Gneiss Complex and the migmatitic Paradis Gneiss Complex suggest a coeval Ordovician metamorphic evolution of the two units.

(*) The narrow migmatite bands of the Val Uffiern–Val Camadra could not be displayed at the scale of the present map sheet. For the exact locations of these bands the reader is referred to BAUMER et al.(2013).

  • Oberstafel-Gneis

    Name Origin

    Oberstafel / Witenwasserenstafel (UR), südlich Realp

    Rank
    lithostratigraphic unit
    Status
    local name (informal)
    In short
    Feinflaseriger Biotit-Plagioklasgneiss, oft mit biotitreichen Schmitzen.
    Age
    Early Ordovician
    Show details

  • Ganneretsch-Gneis

    Name Origin

    Piz Gannaretsch (GR)

    Rank
    lithostratigraphic unit
    Status
    local name (informal)
    In short

    Grobgemengte, migmatitische Glimmer-Alkalifeldspat-Plagioklasgneise mit deutlich erkennbarem Leukosom und Melanosom, grobaugig.

    Show details

  • Gneiss di Sorescia

    Name Origin

    Alpe di Sorescia (TI), N Airolo

    Rank
    lithostratigraphic unit
    Status
    informal term
    In short

    Gneiss melanocratico a due miche e albite-oligoclasio in letti sottili, che contiene occhi di quarzo e feldspati di 2 – 4 cm di lunghezza a intervalli dell’ordine di metri.

    Show details

    • Gneiss del Lago di Dentro

      Name Origin

      Lago di Dentro (TI)

      Rank
      lithostratigraphic unit
      Status
      local name (informal)
      In short
      Hellere Mischgneiszone im südlichen Ast des Sorescia-Gneises.
      Show details

  • Val-Camadra-Migmatit

    Name Origin

    Val Camadra (GR)

    Rank
    lithostratigraphic unit
    Status
    informal term
    In short

    Migmatitgneis-Vorkommen innerhalb des «Streifengneis-Komplexes». Möglicherweise als Einschluss vom Paradis-Gneiskomplex zu betrachten.

    Show details

  • Gneiss occhiadino della Val Gronda

    Name Origin

    Unteres Val Gronda (GR)

    Rank
    lithostratigraphic unit
    Status
    informal term
    In short
    Migmatitischer Chlorit- bis Biotitgneis mit Feldspataugen, z.T. stark tektonisiert, am NE-Rand des Nalps-Gneiskomplexes.
    Show details

  • Anfibolite di Corandoni

    Name Origin

    Piz(zo) Corandoni (TI), Val Piora

    Rank
    lithostratigraphic unit
    Status
    informal term
    In short

    Anfibolite listate, scisto a orneblenda e gneiss micaceo leucocratico, scisto a biotite e pegmatite subordinati.

    Show details
Back to top