Contribución al conocimiento petrológico y geoquímico de las Islas Shetland del Sur (Antártida)

  1. E. Puga
  2. F. Bohoyo
  3. A. Díaz de Federico
  4. J. Galindo Zaldívar
  5. A. Maldonado
Revista:
Geotemas (Madrid)

ISSN: 1576-5172

Año de publicación: 2004

Título del ejemplar: IV Congreso Geológico de España (Zaragoza, 12-15 julio, 2004)

Número: 6

Páginas: 97-100

Tipo: Artículo

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Otras publicaciones en: Geotemas (Madrid)

Resumen

Petrological and geochemical analyses of rock samples from Livingston, King George and Deception Islands, Including Sr and Nd Isotope data, allow for a characterisation of the geodynamic evolution, from Palaeozoic to present, generating the magmatism in these islands. The subduction process of Pacific Plate under the Antarctic Peninsula, originated the Mesozoic to Cenozoic oceanic island arc volcanism of Livingston Island and the Cenozoic one of King George Island, whereas the present Deception Island volcanism was generated in a back-arc extensional setting. Moreover, we have identified at the Hurd Peninsula of Livingston Island, a calc-alkaline volcano-plutonic association, whose products are affected by metamorphism in prehnite-pumpellyite to low-P amphibolite facies, probably originated during the Late Carboniferous subduction of the proto-Pacific Plate below the South America continental margin.

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