Nd isotopic heterogeneity in late-Hercynian granitic plutons from Central Spain
- Villaseca González, Carlos
- Barbero González, Luis C.
- Rogers, G.
- Reyes Hernández, Javier
- Santos Zalduegui, José Francisco
ISSN: 0213-683X
Année de publication: 1997
Número: 23
Pages: 165-168
Type: Article
D'autres publications dans: Geogaceta
Résumé
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