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New geochemical and geochronological data of early Cambrian of (SW Iberia): Cal...
Sanchez-Garcia, Teresa; Pereira, M. Francisco; Bellido, Felix; Chichorro, Martim; Silva, J. Brandao; Valverde-Vaquero, Pablo; Pin, Christian; Solá, RitaThe Ossa-Morena Zone (SW Iberia) displays a well-preserved record of the history of the northern Gondwana margin in Late Ediacaran-Early Cambrian times. This period of time is marked by the late-stage evolution of the Cadomian magmatic arc and related back-arc basins (c. 590-545 Ma), and the onset of rifting and widespread magmatism (c. 530-500 Ma) that led to the opening of the Rheic Ocean. Here we present new...
Geochemical characterization of alkaline gneissic rocks of Alentejo (Portugal)
Lopes, José Carrilho; Munhá, José; Pin, Christian; Mata, JoãoGeochemical characterization of alkaline gneissic rocks of Alentejo (Portugal) J. Carrilho Lopes1, J. Munhá2, C. Pin3, J. Mata2 1Departamento de Geociências, Universidade de Évora & Centro de Geologia da Universidade de Lisboa, Portugal. 2Departamento de Geologia & Centro de Geologia da Universidade de Lisboa, Portugal. 3Département de Géologie, C.N.R.S., Université Blaise Pascal, France. carrilho@uevora.pt Thi...
Rift-related volcanism predating the birth of the Rheic Ocean
Sanchez-Garcia, Teresa; Bellido, Felix; Pereira, M. Francisco; Chichorro, Martim; Quesada, Cecilio; Pin, Christian; Silva, Jose B.Two very different periods of magma emplacement in the crust of the Ossa-Morena zone (early and main events) in SW Iberia have been previously interpreted to record a Cambrian/Early Ordovician rifting event that is thought to have culminated in the opening of the Rheic Ocean during the Early Ordovician. New stratigraphic, petrographic, geochemical and Sm–Nd isotope data from Cambrian volcanic rocks included in ...
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