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7 p, 265.0 KB A revised Ordovician age for the Miranda do Douro orthogneiss, Portugal. Zircon U-Pb ion-microprobe and LA-ICPMS dating / Bea, Fernando (Universidad de Granada. Departamento de Mineralogía y Petrología) ; Mntero, P. (Universidad de Granada. Departamento de Mineralogía y Petrología) ; Talavera, C. (Universidad de Granada. Departamento de Mineralogía y Petrología) ; Zinger, T. (Russian Academy of Sciences. Institute of Precambrian Geology and Geochronology)
The Miranda do Douro orthogneiss was believed to be the oldest magmatic rock of the Central Iberian Zone, on the base of a U-Pb discordia upper intercept of 618 ± 9 Ma. Nevertheless, new ion-microprobe and LA-ICPMS U-Pb zircon dating revealed that the crystallization age was 483 ± 3 Ma. [...]
2006 - 10.1344/105.000000353
Geologica acta, Vol. 4, Núm. 3 (2006) , p. 395-401  

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