Reseña preliminar sobre el hallazgo de diáspora asociada a la serpentinización de los macizos de peridotitas de Ronda

Abstract

We report the presence of large aggregates (diameter > 1 cm) of diaspore related to the serpentinization of the Sierra Alpujata massif of the Ronda peridotites (Betic Cordilleras, southern Spain). The diaspore is found in two different but related settings: in narrow metasomatic rims pervading the peridotites from steeply dipping tension joints and in the blackwall zone developed along the normal fault that separates the peridotites from the overlying metamorphic cover. The systematic association of diaspore with chlorite points to very low temperature conditions (T < 100 ºC) for diaspore formation