O pórfiro dacítico de Valverde (Alcácer do Sal) idade Rb-Sr e suas implicações

• Author(s): Pinto Coelho, A. V. ; Abranches, C. ; Canilho, M. H.
• Date: 2008
• Persistent ID: http://hdl.handle.net/10362/1547
• Origin: Repositório Institucional da UNL
• Subject(s): Dacite; Rb-Sr age; Upper Carboniferous; Valverde (Alcácer do Sal); Portugal
• Document Type: Article
• Language: Portuguese

Description

The unexpected discovery of a small outcrop of igneous rock isolated within an extensive outcrop of Neogene and Quaternary sediments called for the attention of CEPUNL's researchers. The rock is a dacite whose Rb-Sr age (C. A. and M. H. C.) is 291 M. y. upper Carboniferous. Hence the dacite may be related to volcanism in the Santa Suzana tectonic basin.