Condiciones P - T de emplazamiento del batolito de Nisa-alburquerque

Abstract

The Nisa-Alburquerque batholith (294 ±77 Ma) is composed of S-type granites and small stocks of l-type granitoids. The batholith was emplaced into a variety of country rocks (metasediments and metaigneous lithologies) of three different domains, namely, the southern Central Iberian zone, the Central Unit, and the northern Ossa-Morena Zone. Pressure and temperature during final emplacement is investigated by considering previous studies in the contact aureole and by comparing with P-T estimates based on the mineralogy, normative composition and geochemistry of the S-type granites.

On this ground, we proposed pressures of —2,3-3 kbar, and temperatures of — 650 °C as the most plausible ones during final emplacement of this batholith