Plate-tectonic model for southern Antarctic Peninsula and its relation to southern Andes

Resultado de la investigación: Article

65 Citas (Scopus)

Resumen

Three main Upper Jurassic-Cretaceous tectono-stratigraphic units recognized in Palmer Land and Alexander Island are comparable with assemblages formed (1) in an ensialic volcanic arc (Upper Jurassic Volcanic Group), (2) in a forearc or intra-arc marine basin (Fossil Bluff Formation), and (3) in a back-arc marine basin (Crabeater Point sediments and Latady Formation), possibly representing a proto-Weddell Sea. A sequence of intensely sheared, polyphasally deformed turbidites and pillow lava rocks of possible late Paleozoic or Triassic age, exposed along western Alexander Island, is tentatively interpreted as a trench assemblage accreted during an early stage of subduction. There is a close correlation between these units and the approximately coeval island-arc-marginal basin system of the southern Andes and South Georgia.

Idioma originalEnglish
Páginas (desde-hasta)211-214
Número de páginas4
PublicaciónGeology
Volumen4
N.º4
DOI
EstadoPublished - 1976

Huella dactilar

plate tectonics
island arc
Jurassic
pillow lava
marginal basin
basin
trench
Triassic
subduction
Paleozoic
fossil
Cretaceous
rock
sediment
land

ASJC Scopus subject areas

  • Geology

Citar esto

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abstract = "Three main Upper Jurassic-Cretaceous tectono-stratigraphic units recognized in Palmer Land and Alexander Island are comparable with assemblages formed (1) in an ensialic volcanic arc (Upper Jurassic Volcanic Group), (2) in a forearc or intra-arc marine basin (Fossil Bluff Formation), and (3) in a back-arc marine basin (Crabeater Point sediments and Latady Formation), possibly representing a proto-Weddell Sea. A sequence of intensely sheared, polyphasally deformed turbidites and pillow lava rocks of possible late Paleozoic or Triassic age, exposed along western Alexander Island, is tentatively interpreted as a trench assemblage accreted during an early stage of subduction. There is a close correlation between these units and the approximately coeval island-arc-marginal basin system of the southern Andes and South Georgia.",
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Plate-tectonic model for southern Antarctic Peninsula and its relation to southern Andes. / Suárez, Manuel.

En: Geology, Vol. 4, N.º 4, 1976, p. 211-214.

Resultado de la investigación: Article

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