High-pressure,low-temperature metamorphism in Alpujarride Units of southeastern Betics (Spain)Métamorphisme de haute pression et basse température dans les unités Alpujarrides du Sud-Est de la cordillère Bétique (Espagne) |
| |
| Authors: | Guillermo Booth-Rea José Miguel Azañón Bruno Goffé Olivier Vidal José Miguel Martı́nez-Martı́nez |
| |
| Institution: | 1. Dpto de Geodinámica, Universidad de Granada, Facultad de Ciencias, 18076 Granada, Spain;2. Laboratoire de géologie, UMR 8538 CNRS, École normale supérieure, 24, rue Lhomond, 75231 Paris cedex 05, France;3. LGCA, CNRS–université Joseph-Fourier, 1381, rue de la Piscine, BP 53, 38041 Grenoble cedex 09, France |
| |
| Abstract: | We present the first occurrences of high-pressure, low-temperature ferro-magnesiocarpholite-bearing mineral assemblages associated to quartz segregations in the Alpujarride units of southeastern Betics (Sierra de Almagro, Sierra de los Pinos and Sierra Cabrera). Thermobarometric results show that the carpholite-bearing rocks underwent the same P–T conditions in the three outcrops, i.e. 8–10 kbar, 350–400 °C. Metamorphic and structural data allow us to conclude that these rocks belong to the same Alpujarride unit. In the Sierra de Almagro, tectonic units with carpholite-bearing rocks overlie low-pressure, low-temperature Alpujarride units, then forming a stack with an inverted tectono-metamorphic sequence, as observed in the central and western part of the Alpujarride complex. The preservation of carpholite-bearing assemblages in these rocks implies that no significant temperature increase occurred during the exhumation history. To cite this article: G. Booth-Rea et al., C. R. Geoscience 334 (2002) 857–865. |
| |
| Keywords: | thermobarometry carpholite Alpujarrides southeastern Betics Spain thermobarométrie carpholite Alpujarrides Sud-Est de la cordillère Bétique Espagne |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
