First evidence of high-pressure, low-temperature metamorphism in the Alpujárride nappes, Betic Cordilleras (S.E. Spain)
Goffe, Bruno; Michard, Andre; Garcia-Duenas, Victor; Gonzalez-Lodeiro, Francisco; Monie, Patrick; Campos, Juan; Galindo-Zaldivar, Jesus; Jabaloy, Antonio; Martinez-Martinez, José Miguel; Simancas, José Fernando
European Journal of Mineralogy Volume 1 Number 1 (1989), p. 139 - 142
published: Mar 21, 1989
ArtNo. ESP147050101017, Price: 29.00 €
Abstract HP-LT assemblages and minerals are described for the first time in the Alpujärride nappes of the Central and Eastern Betic Cordilleras. These assemblages occur in Permo-Triassic metapelites and include ferro- and magnesio-carpholite, aragonite, kyanite and Mg-rich chloritoid. The estimated P-T conditions range from 4-5 kbar at 280-300 °C to 7-9 kbar at 450-500 °C. Hence, these nappes underwent HP-LT metamorphism (thermal gradient of 12-16 °C/km), just as did the underlying Nevado-Filabride units, prior to their low- to intermediate pressure evolution.