Geoquímica de feldespatos y moscovita de las Pegmatitas del Cap de Creus

• P. A. Abella ^[1] ; F. Velasco ^[2] ; l. Yusta ^[1] ; J. C. Melgarejo i Draper ^[1]
  1. [1] Universitat de Barcelona

     Universitat de Barcelona

     Barcelona, España

     
  2. [2] Universidad del País Vasco/Euskal Herriko Unibertsitatea

     Universidad del País Vasco/Euskal Herriko Unibertsitatea

     Leioa, España

     
• Localización: Geogaceta, ISSN 0213-683X, Nº. 20, 3, 1996, págs. 700-702
• Idioma: español
• Enlaces
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• Resumen

  • The Cap de Creus (NE Spain) is the easternmost outcrop of the Hercynian basement of the Pyrenees. The peninsula is constituted by materials affected by the hercynian metamorphism. A pegmatitic field occurs within the metamorphic rocks in the northern part of the Cap de Creus peninsula. Four pegmatite types have been established according to internal structure and mineralogica/ criteria: microcline-rich (type I); beryl-columbite (type //); beryl-columbite phosphate (type 111) and albite (type IV). The composition of moscovite and feldspars have been studied. The K/Rb ratio decreases progressively from type I to type IV, and a/so there is a progressive enrichment in P, Cs, and Y, according to the degree of pegmatite evolution.