Thermal effects of the Santa Eulalia Plutonic Complex (southern Portugal) on the meta-igneous and metasedimentary host rocks

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

Authors

Cruz, C (Author) Other; Ribeiro, MA (Author) FCUP; St'Ovaia, H (Author) FCUP; Martins, HCB (Author) FCUP

Journal

Title: ESTUDIOS GEOLOGICOS-MADRID

Vol. 70

Final page: e016

ISSN: 0367-0449

Indexing

ISI Web of Knowledge - 1 Citation

Scopus - 1 Citation

Scientific classification

FOS: Natural sciences > Earth and related Environmental sciences

Other information

Authenticus ID: P-00A-244

DOI: 10.3989/egeol.41730.322

Abstract (EN): The Santa Eulalia Plutonic Complex (SEPC) is a late-Variscan granitic body located in the northern part of the Ossa Morena Zone, a inner zone of the Variscan Iberian Massif. The SEPC host rocks are composed of meta-igneous and metasedimentary units, from Upper Proterozoic to Paleozoic ages, with a NW-SE structure, cross-cut by the SEPC. The SEPC host rocks, with low grade metamorphism show well preserved primary sedimentary or igneous mineralogical, textural and structural features. The thermal effect induced by the SEPC is restricted to the roof pendants. At N and NE of the SEPC, textures and paragenesis resulting from thermal metamorphism, are not related to the SEPC intrusion but to a previous magmatism, controlled by the NW-SE regional anisotropies. The restriction of the thermal effects to the pluton roof may be caused by a combination of several interrelated factors: higher volume of granitic mass, thermal effect by advection of fluids and longer period of prevalence of high thermal conditions. The geochemical study of SEPC host rocks shows the heterogeneous character and diversity of metasedimentary, igneous and meta-igneous rocks. The whole rock geochemical data indicate that all the metasedimentary lithologies derived from an upper continental crustal source and the igneous and meta-igneous rocks show no evidence of metasomatic effects by the SEPC emplacement.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 10