CRILAR 12590
CENTRO REGIONAL DE INVESTIGACIONES CIENTIFICAS Y TRANSFERENCIA TECNOLOGICA DE LA RIOJA
Unidad Ejecutora - UE
artículos
Título:
U-PB SHRIMP ZIRCON DATING OF GRENVILLIAN METAMORPHISM IN WESTERN SIERRAS PAMPEANAS(ARGENTINA): CORRELATION WITH THE AREQUIPAANTOFALLA CRATON AND CONSTRAINTS ON THE EXTENT OF THE PRECORDILLERA TERRANE
Autor/es:
CASQUET, C.; PANKHURST, R.J.; FANNING, C.M.; BALDO, E.; GALINDO, C.; RAPELA, C.W.; GONZÁLEZ-CASADO, J.M.; DAHLQUIST, J.A.
Revista:
GONDWANA RESEARCH
Editorial:
Elsevier Science Ltd.
Referencias:
Lugar: Oxford. UK.; Año: 2006 vol. 9 p. 524 - 529
ISSN:
1342-937X
Resumen:
Metamorphism of Grenvillian age (ca. 1.2 Ga; U-Pb zircon dating) is recognized for the first time in the Western Sierras Pampeanas (Sierra de Maz). Conditions reached granulite facies (ca. 780ºC and ca. 780 MPa). Comparing geochronological and petrological characteristics with other outcrops of Mesoproterozoic basement, particularly in the northern and central ArequipaAntofalla craton, we suggest that these regions were part of a single continental crustal block from Mesoproterozoic times, and thus autochthonous or parautochthonous to Gondwana.
