«Ältere Orthogneise (und Metabasite)»

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Representation and status

Index
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CMYK Color
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RGB color
R: 225 G: 165 B: 185
Rank
lithostratigraphic unit
Validity
Unit is in Use
Status
incorrect name (though informally used)
SCS note
-
SCS date
-
Comment
-

Nomenclature

German
«Ältere Orthogneise (und Metabasite)»
French
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Italian
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English
«Older Orthogneisses (and Metabasites)»
Origin of the Name
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Historical Variants
Ältere Orthogneise (Grauert 1969), Vieux orthogneiss (Brugger 1992), older orthogneisses (Maggeti & Flisch 1993, Müller et al. 1994), ältere Orthogneise (Poller 1994, Meyer 2017)
Nomenclatorial Remarks
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Synonyms

Synonyms
Non-synonyms
Possible confusion

Description

Description
Granit bis Augengneise: Mönchalp (Streckeisen 1928, Wenk 1934) Tonalite/Granodiorite: seltener (Quarz-)Diorite: weit verbreitete Hornblendegneise Gabbroide: Val Sarsura (Spaenhauer 1932, Thierrrin 1982) + ... (van der Crone 1989a) Ultramafitite: Harzburgite (Thierrin 1982)
Geomorphology
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Thickness
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Components

Lithological content
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Mineral content
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Fossil content
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Hierarchy and succession

Units at roof
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Units at floor
Lateral equivalents
Upper boundary
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Lower boundary
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Stratigraphic discussion
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Age

Age at top
Middle Ordovician
Note about top
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Age at base
Neoproterozoic (= Late Proterozoic)
Note about base
-
Dating method
895 +130/-140 Ma (Rb/Sr-Isochron: Maggetti & Flisch 1993), 525.5 +/-21 Ma (Müller et al. 1994) 527-460 Ma (Poller 1997, Poller et al. 1997b)

Geography

Geographical extent
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Type area
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Type locality
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Type profile
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Reference profiles
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Point of interest
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Paleogeography and tectonic

Paleogeography
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Kind of protolith
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Conditions of formation
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Sequence
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Tectonic Unit (resp. main category)
Silvretta
  • S-chanf :
    inkl. Suvsilvrettide Linsen
Metamorphism
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Metamorphic facies
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Note on metamorphism
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References

Definition
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Revision
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Important publications
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Material and varia

Applications
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  • Mönchalp-Augengneis Show details

    Origin of the Name

    Mönchalp (GR), SE Klosters-Serneus

    Rank
    lithostratigraphic Formation
    Status
    informal term
    Valid name
    In Short
    «Älterer Orthogneis» der Silvretta-Decke: Augengneis (anatektischer S-Typ Metagranit) mit grosser K-Feldspar, bläulicher Quarz, Biotit und grau-grünlicher, pinitisierter Cordierit. Lokal schiefrig bis mylonitisiert. Enthält viele eckige Einschlüsse von älteren Paragneisen und Amphiboliten (inkl. retrograden Eklogiten).
    Age
    Precambrian - Cambrian
    Thickness
    Bis 350 m mächtig (Streckeisen in Rutsch et al. 1966).
    Geographical extent
    Pischagruppe SE Klosters, zwischen Mönchalptal und Vereinatal.
    Type area
    -
    Comment
    -
  • Rotbüel-Metagranit Show details

    Origin of the Name

    Rotbüel = Rotbühel (Österreich)

    Rank
    lithostratigraphic unit
    Status
    local name (informal)
    Valid name
    In Short
    Schollenreicher, muskovitführender «Älterer Orthogneis» der Silvretta-Decke.
    Age
    -
    Thickness
    -
    Geographical extent
    -
    Type area
    -
    Comment
    -
  • Val-Gonda-Quarzdiorit Show details

    Origin of the Name

    Val Gondas (GR)

    Rank
    lithostratigraphic unit
    Status
    -
    Valid name
    In Short
    Quarzdioritischer Hornblendegneis.
    Age
    -
    Thickness
    -
    Geographical extent
    -
    Type area
    -
    Comment
    -
  • Granat-Hornblende-Plagioklas-Orthogneis Show details

    Origin of the Name
    -
    Rank
    lithostratigraphic unit
    Status
    informal term
    Valid name
    In Short
    -
    Age
    Neoproterozoic (= Late Proterozoic) - Early Cambrian
    Thickness
    -
    Geographical extent
    -
    Type area
    Oberes Val Sarsura (GR)
    Comment
    -
  • Val-Sarsura-Gabbrokomplex Show details

    Origin of the Name

    Oberes Val Sarsura (GR)

    Rank
    lithostratigraphic unit
    Status
    informal term
    Valid name
    In Short
    Ultramafite (harzburgitische Kumulate), massiver Olivin-Clinopyroxen-Norit, Flasergabbro, blastomylonitischer Gabbro und Tonalit.
    Age
    Neoproterozoic (= Late Proterozoic) - Neoproterozoic (= Late Proterozoic)
    Thickness
    -
    Geographical extent
    -
    Type area
    -
    Comment
    -
  • Rauher-Kopf-Eklogit Show details

    Origin of the Name

    Rauher Kopf (Österreich)

    Rank
    lithostratigraphic unit
    Status
    local name (informal)
    Valid name
    In Short
    -
    Age
    Cambrian - Ordovician
    Thickness
    -
    Geographical extent
    -
    Type area
    -
    Comment
    -