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Please use this identifier to cite or link to this item: http://hdl.handle.net/10362/1540

Título: Âges K-Ar de glauconites des environs de Luz de Tavira, Algarve
Autor: Antunes, M. T.
Odin, G.
Pais, João
Palavras-chave: K-Ar ages
Glauconitic silts
Eastern Algarve
Upper Miocene
Issue Date: 13-Aug-2008
Resumo: Glauconite K-Ar ages (6.88±0.4; 7.03±0.4 MY) confirm earlier reports to Upper Tortonian of silt beds near Morgadinho, Luz de Tavira and Tavira. Taking stratigraphical position and age into account it is possible now to correlate these beds with similar ones at Quelfes and Cacela (Formação de Cacela, lower member, ascribed to the upper part of N16 or to NI7 Blow's zone, Globorotalia humerosa - G. dutertrei; Tortonian to Messinian, according to the ostracod fauna). Limit between the above quoted zones is thus placed at about 7 MY. New K-Ar ages greatly improve the knowledge about Upper Miocene in eastern Algarve, and on regional tectonic evolution. This is particulary so in what concerns an intra-Tortonian phase.
URI: http://hdl.handle.net/10362/1540
Appears in Collections:FCT: DCT - Ciências da Terra

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