Tectono-metamorphic evolution, migmatization and syn-tectonic magmatism from Porto region (NW Portugal) [Evolução tectono-metamórfica, migmatização e magmatismo sin-tectónico na região do Porto (NW Portugal)]

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

Authors

Ribeiro, MA (Author) FCUP; Martins, HCB (Author) FCUP; Sant'Ovaia, H (Author) FCUP; Doria, A (Author) Other; Ferreira, J (Author) Other; Areias, M (Author) Other

Journal

Title: Comunicações Geológicas

Vol. 101

Pages: 297-300

ISSN: 0873-948X

Publisher: LNEG - Laboratório Nacional de Energia e Geologia

Indexing

ISI Web of Knowledge

Scopus - 2 Citations

Other information

Authenticus ID: P-00G-53F

Abstract (EN): The NW of the Porto-Viseu metamorphic belt is characterized by syn-tectonic and post-tectonic magmatism, associated with migmatites. The surrounding metasedimentary rocks show narrow and progressive metamorphic zoning ranging from chlorite to sillimanite zone. The metamorphic paragenesis with staurolite and without cordierite exclude barometric conditions <2 Kb, implying depths ¿ 6-7 km. The upward flow of ductile metamorphic rocks, promoted by the syn-tectonic rising of magmas and melts is indicated by syn-kinematic (syn-D3) staurolite, strong mineral lineation down-dip in S3 plan and the association of migmatites with syn-tectonic granitic rocks. © 2014 LNEG ¿ Laboratório Nacional de Geologia e Energia IP.

Language: Portuguese

Type (Professor's evaluation): Scientific