Enclaves con espinela-corindon·sillimanita en rocas andesítico-dacíticas (Noguera, sierra de Albarracin. Teruel)
DOI:
https://doi.org/10.3989/egeol.87433-4582Keywords:
Dacites, andesites, inclusions, spinel, corundum, sillimaniteAbstract
In intrusive dacitic-andesitic rocks, near Noguera de Albarracín, Iberian Mountains (Spain), there exist metamorphic inclusions with spinel, corundum, sillimanite, biotite and other interesting minerals, many of them indicating high T-P conditions (above 800° C and 5 Kb). The petrological studies indicate that such enclaves were built through a poliphasic process where various prograde and retrograde minerals were formed. A possible relationship between the metamorphic and the volcanic processes and both, metamorphic and volcanic, with the swelling-uplifting phenomenon, securely related with intrusive granitoids that took place in Albarracin area during last Hercynian times, is considered here.
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