Ötztal-Kristallin

Representation and status

Color CMYK

(0%,16%,16%,2%)

Color RGB

R: 250 G: 210 B: 210

Rank

lithostratigraphic Group

Validity

Unit is in Use

Status

informal term

Nomenclature

Deutsch

Ötztal-Kristallin

Français

Socle cristallin de l'Ötztal

English

Ötztal Crystalline Basement

Origin of the Name

Ötztal (Österreich)

Historical Variants

Ötztalergruppe (Koch 1876a/b/c), Ötztal-Nunamasse (Staub & Cadisch 1921), Oetzmasse (Staub 1934), Kristallin der Ötztal-Decke, Ötztaler Kristallin (Medwenitsch 1962, Schmid 1973), Ötztal-Kristallin (Stutz & Walter 1983), Ötztal complex (Ebner et al. 1987), Ötztal-Stubai unit = Ötztal-Stubai complex = Ötztal-Stubai block (Hoinkes & Thöni 1993), Ötztal-Stubai-Komplex (Gruber et al. 2010)

Description

Description

Reste der sedimentäre Bedeckung = Piz Lat - Unterengadin - Ducan - Landwasser ; Anatexis um 460 +/-30 Ma (Söllner et al. 1982), Eklogit noch älter (Miller 1966)

Hierarchy and sequence

Subordinate units

• Winnebach-Migmatit
• Laas-Serie
• Schneeberg-Komplex

Age

Age at top

• Paleozoic

Age at base

• Neoproterozoic (= Late Proterozoic)

Palaenography and tectonic

Tectonic unit (resp. main category)

• Ötztal

Kind of protolith

• sedimentary
• plutonic

Metamorphism

polycyclic

Metamorphic facies

• amphibolite facies
• eclogite facies

References

Definition

Hoinkes G., Thöni M. (1993) : Evolution of the Ötztal-Stubai, Scarl-Campo and Ulten Basement Units. Pre-Alpine Geology in the Alps, 485-494

p.487: The Ötztal-Stubai complex consists mainly of amphibolite facies-grade metasedimentary quartzofeldspatic rocks and subordinated metapelites. Intercalated are numerous acid to intermediate metamagmatites, some amphibolites, éclogites and metacarbonates (especially in the Schneeberg complex and the Laas series).