Nd isotopic heterogeneity in late-Hercynian granitic plutons from Central Spain

• Autores: Carlos Villaseca González, Luis C. Barbero González, G. Rogers, Javier Reyes Hernández, José Francisco Santos Zalduegui
• Localización: Geogaceta, ISSN 0213-683X, Nº. 23, 1997, págs. 165-168
• Idioma: inglés
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• Resumen

  • Some Hercynian granitic plutons from Central Spain show variation in initial Nd isotopic ratios defining different trends with increasing silica content. There is a decoupling between the Sr and Nd isotopic systems as these plutons present homogeneous initial Sr ratios. Magmatic processes could explain this Nd isotopic disequilibrium; it is suggested that Nd-bearing restitic or early precipitating accesory phases could control the Nd isotopic heterogeneity of the granites