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Title: Phase equilibria and geochronology of Ossa-Morena eclogites
Authors: Moita, Patricia
Munhá, José
Fonseca, Paulo
Pedro, Jorge
Araújo, Alexandre
Tassinari, Colombo
Palacios, Teresa
Keywords: Eclogites
Ossa-Morena Zone
Issue Date: 2005
Abstract: The mineralogical evolution of OMZ eclogites was modelled by calculated P-T pseudosection analysis for an appropriate bulk composition in the model system CNFMASH. OMZ eclogites having developed a clockwise P-T path that reached 16-18 kbar and 600-650 ºC, underwent isothermal decompression to 12-10 kbar before final cooling (< 550 ºC) to greenschist facies conditions. Sm/Nd and Ar/Ar radiometric data indicate that the OMZ eclogite facies metamorphism took place at ~370 Ma, being followed shortly afterwards by exhumation during (D1) nappe emplacement.
Type: lecture
Appears in Collections:CGE - Comunicações - Em Congressos Científicos Internacionais
GEO - Comunicações - Em Congressos Científicos Internacionais

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