Magnetic fabric of the Ricany granite, Bohemian Massif .

• Autores: J. Trubac, J. Zak, V. Janousek
• Localización: Trabajos de geología, ISSN 0474-9588, Nº 30, 2010, págs. 289-295
• Idioma: inglés
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• Resumen

  • The Říčany pluton represents an elliptical shallow-level intrusion made up of outer, morefractionated, strongly porphyritic granite and inner, less evolved, weakly porphyritic granite.Mesoscopic foliation defines an onion-skin pattern and corresponds well to the magnetic (AMS) foliations.Magnetic lineation plunges shallowly (0-20°) and is subparallel to the contact in the outer partof the pluton, whereas in the pluton center lineation dips steeply (60-70°) with variable trends. Weinterpret the fabrics in the pluton as being a result of helical flow, whereby faster subvertical flow in thelow-viscosity pluton center generated subhorizontal flow in the outer, higher-viscosity (phenocrystrich)margin.