Diques camptoníticos en el Sistema Central Español
DOI:
https://doi.org/10.3989/egeol.86422-3738Keywords:
Camptonite, ocellum, diatreme, immiscibility, syenite, alkaline dykes, low Mesozoic .Abstract
Mineralogical and geochemical characters of camptonite dykes with ocllar textures and diatreme facies of the Sistema Central Español 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.
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