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Diques camptoníticos en el Sistema Central Español

1986; Spanish National Research Council; Volume: 42; Issue: 2-3 Linguagem: Espanhol

10.3989/egeol.86422-3738

1988-3250

Carlos Villaseca, J. de la Nuez,

Geological and Geophysical Studies Worldwide

Mineralogical and geochemical characters of camptonite dykes with ocllar textures and diatreme facies of the Sistema Central Espanol have been determined. Camptonites are ultrabasic and peralkaline in composition, with moderate potassic character. The ocellar textures in these dykes may be due to immiscibility phenomena berween a syenitic-like liquid and a lamprophyre magma. The appearance of diatreme breccia facies, filled with xenoliths of shallow granitic rocks and granulites undepleted in LIL elements, provides an exceptional sampling of anomalous continental crust in this area.