U-Pb (SHRIMP) and Sm-Nd geochronology on foz do douro metamorphic complex biotite orthognaiss (NW Portugal) [Geocronologia U-Pb (SHRIMP) e Sm-Nd do ortognaisse biotítico do complexo metamórfico da foz do douro (NW de Portugal)]

• Type: Article in International Scientific Journal
• Date: 2014

Authors

Sousa, M (Author) Other; Sant'Ovaia, H (Author) FCUP; Tassinari, C (Author) Other; Noronha, F (Author) Other

Journal

Title: Comunicações Geológicas

Vol. 101

Pages: 225-228

ISSN: 0873-948X

Publisher: LNEG - Laboratório Nacional de Energia e Geologia

Indexing

ISI Web of Knowledge

Scopus - 5 Citations

Other information

Authenticus ID: P-00G-6RR

Abstract (EN): High resolution U-Pb (SHRIMP) and Sm-Nd geochronological analysis in zircon grains were obtained in a biotite orthogneis from the ¿Foz do Douro Metamorphic Complex¿. The UPb results revealed an emplacement age of 452-456 ± 7.8 Ma and an inherited age of 1735 ± 70 Ma. The Sm-Nd whole rock isotopic data suggests a model age (T<inf>DM</inf>) of ca. 500 Ma and the ¿<inf>Nd</inf>=+6.88 confirms a mantle contribution for the original magmatic rock. © 2014 LNEG ¿ Laboratório Nacional de Geologia e Energia IP.

Language: Portuguese

Type (Professor's evaluation): Scientific