A revised Ordovician age for the Sisargas orthogneiss, Galicia (Spain)Zircon U-Pb ion-microprobe and LA-ICPMS dating

1. Talavera, C.
2. Bea Barredo, Fernando
3. Montero, P.
4. Whitehouse, M.

Exporta

Exporta

×

MLA

modern-language-association

APA

apa

Chicago

chicago-fullnote-bibliography

Harvard

harvard-cite-them-right

Vancouver

vancouver-author-date

---

RIS BibTex

Exporta

×

El document no es pot exportar perquè pertany a un altre portal.

Text complet

lock_openDialnet dialnet lock_openText complet externo

DIALNET GOOGLE SCHOLAR lock_openDialnet editor

Altres publicacions en: Geologica acta: an international earth science journal

Resum

The Sisargas orthogneiss is located in the Schistose Domain of the Galicia Trás-Os-Montes Zone. It has previously been dated by Allegret and Iglesias (1987) who reported an U-Pb upper intercept at 570 ± 14 Ma, considered to be the crystallization age. For this reason, the Sisargas orthogneiss has traditionally been considered one of the oldest magmatic rocks of the Central Iberian Zone. However, new SIMS and LA-ICPMS data reveal that it crystallized at 479 ± 7 Ma and contains zircons with abundant pre-magmatic cores with ages clustering at 585 ± 15 Ma. This suggests that the Sisargas orthogneiss derives from the melting of a Pan-African protolith.

Fuente de los datos: Dialnet