Morfología de los circones como indicadores petrogenéticos de la asociación tonalita-leucograndito.: el caso del plutón de Zarza la Mayor (Cáceres-España).

• Álvaro Rubio Ordoñez ^[1] ; Luis Guillermo Corretgé Castañón ^[1] ; Andrés Cuesta Fernández ^[1]
  1. [1] Universidad de Oviedo

     Universidad de Oviedo

     Oviedo, España

     
• Localización: Geogaceta, ISSN 0213-683X, Nº. 41, 2006, págs. 187-190
• Idioma: español
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• Resumen

  • Zarza la Mayor pluton is a good example of the tonalite-leucogranite association. A new survey has been carried out and some additional study of zircon morphologies has been performed. Detailed survey shows the true intrusive character of the leucogranite pinpointing to a ring-dyke emplacement mechanism.

    Zircon morphologies show different characteristics for the tonalite (anatectic, with zircon typologies S1- Q1-L1) and leucogranite (calc-alkaline, with zircon typologies S6-Q2). This apparent paradox is explained taking care of the strong assimilation of CXG metasediments (Neoproterozoic - Lower Cambrian) by a dioritic-tonalitic magma through piecemeal-stopping processes.