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

  1. Villaseca González, Carlos
  2. Barbero González, Luis C.
  3. Rogers, G.
  4. Reyes Hernández, Javier
  5. Santos Zalduegui, José Francisco
Revista:
Geogaceta

ISSN: 0213-683X

Año de publicación: 1997

Número: 23

Páginas: 165-168

Tipo: Artículo

Otras publicaciones en: Geogaceta

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