Oviedo, España
Oxygen and strontium isotope composition of the external and external-leucocratic facies suggest an origin essentially by partíal melting of crustal materials far the postkinematic Caldas de Reyes granitic s.f. massif. On the basis of the Sr isotopic data the emplacement of this massif is established at c. 287± 10 Ma (whole rock isochron).
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