Ordovician peraluminous granites in the Sierra de Pie de Palo, Western Sierras Pampeanas of ArgentinaGeotectonic Implications

  1. E.G. Baldo 1
  2. J.A. Dahlquist 1
  3. C. Casquet 2
  4. C.W. Rapela 3
  5. R.J. Pankhurst 4
  6. C. Galindo 1
  7. C.M. Fanning 5
  8. C. Ramacciotti 1
  1. 1 CICTERRA (CONICET-UNC)
  2. 2 Univ. Complutense-CSIC
  3. 3 Centro de Investigaciones Geológicas (CONICET-UNLP)
  4. 4 NERC Isotope Geosciences Laboratory, British Geological Survey, Keyworth, Nottingham
  5. 5 Research School of Earth Sciences. The Australian National University, Canberra, Australia
Mostrar afiliaciones +
Revista:
Geotemas (Madrid)

ISSN: 1576-5172

Año de publicación: 2012

Título del ejemplar: VIII Congreso Geológico de España, Oviedo, 17-19 de julio, 2012.

Número: 13

Páginas: 1907-1910

Tipo: Artículo

DIALNET GOOGLE SCHOLAR

Otras publicaciones en: Geotemas (Madrid)

Resumen

Sills of garnet-biotite-muscovite peraluminous granite were injected into the upper part of the nappe stacking from the Sierra de Pie de Palo, formed during the Famatinian orogeny (Ordovician). Two studied granites yielded SHRIMP U-Pb zircon ages of 474 ± 6 Ma and 470 ± 10 Ma, indicating that they were largely coeval with thrusting. Structural similarities with Himalayan leucogranites injected into the upper part of the Greater Himalayan Sequence during India–Asia collision suggest a similar geotectonic scenario for the Famatinian granites. It is suggested that felsic magmas were generated at the root of the thrust plane, probably close to the Famatinian magmatic arc along the Western Gondwana margin.

Fuente de los datos: Dialnet