Diechtergletscher–Tscharren-Zone

Back to Spät- bis postvariszische Sedimente und Vulkanite des Aar-Massivs

Representation and status

Color CMYK
N/A
Color RGB
R: 241 G: 239 B: 237
Rank
tectonic zone
Validity
Unit is in Use
Status
valid

Nomenclature

Deutsch
Diechtergletscher–Tscharren-Zone
Français
zone du Diechtergletscher–Tscharren
Italiano
zona del Diechtergletscher–Tscharren
English
Diechtergletscher–Tscharren zone
Historical Variants

Diechtergletscher-Tscharren Zone (Berger et al. 2017)

Hierarchy and sequence

Subordinate units

Age

Age at top
  • Late Carboniferous (= Pennsylvanian)
Age at base
  • Late Carboniferous (= Pennsylvanian)

Geography

Geographical extent
Ofenhoren - Gwächtenhoren - Triftstöckli - Maasplanggjoch.

Palaenography and tectonic

Paleogeography
European Continent
Tectonic unit (resp. main category)

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.42: For tectonic reasons, the Diechtergletscher-Tscharren Zone was separated from the Lötschental-Maderanertal Zone, despite the lithological similarity and the close age relationships. This separation is based on the precise chronological relationship of the Diechtergletscher-Tscharren Zone with respect to the intrusion of the Central Aar Granite. The latter intruded 297±2 Ma ago into the metasedimentary, volcanic and volcaniclastic rocks of the Diechtergletscher-Tscharren Zone, dated at 303±4 Ma, at depths of 8–10 km (Figs. 6, 9 b, SCHALTEGGER & CORFU 1995). This observation (FRANKS 1968 a, SCHENKER 1986) implies that the Late Carboniferous land surface became buried to a depth of at least 8 km within a few million years (see also p. 51f.). The Diechtergletscher-Tscharren Zone is divided into two formations: the Diechtergletscher Formation and the Tscharren Formation.

  • Diechtergletscher-Formation

    Name Origin

    Diechtergletscher (BE), Guttannen

    Rank
    lithostratigraphic Formation
    Status
    informal term
    In short

    Dunkle, plattige Tonschiefer mit dünnen, meist weisslichen, vulkanogenen Lagen (Pyroklastite) der Diechtergletscher-Tscharren-Zone.

    Age
    Late Pennsylvanian
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    • Maasplanggstock-Metaandesit

      Name Origin

      Maasplanggstock (BE)

      Rank
      lithostratigraphic unit
      Status
      local name (informal)
      In short

      Vulkanischer bis subvulkanischer Andesitkörper der im Diechtergletscher-Formation eingelagert ist.

      Age
      Late Pennsylvanian
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    • Garwiidi-Diorit

      Rank
      lithostratigraphic unit
      Status
      local name (informal)
      In short

      Spät- bis postvariszischer (295,2 +/-1.7 Ma), subvulkanischer, Biotit führender Hornblende-Quarzdiorit in der Dieschtergletscher-Formation.

      Age
      Asselian
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  • Tscharren-Formation

    Name Origin

    Tscharren (UR)

    Rank
    lithostratigraphic Formation
    Status
    informal term
    In short

    Sedimentäre und vulkanogene Bildungen der Diechtergletscher-Tscharren-Zone v.a. schwarze Tonschiefer mit Anthrazitflözen, Konglomerate, Ignimbrite, helle und dunkle Tuffe, z.T. Lapilliführend.

    Age
    Late Pennsylvanian
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    • «Tuffaceous Member»

      Rank
      lithostratigraphic Member (Subformation)
      Status
      incorrect name (though informally used)
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    • «Ignimbritic Member»

      Status
      unknown status
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    • Rinderbiel-Mikrogranit

      Name Origin

      Hoch Rinderbiel (UR)

      Rank
      lithostratigraphic unit
      In short
      Porphyrischer Mikrogranit der Tscharren-Formation.
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