Early Permian age of granite pebbles from an Eocene or Oligocene conglomerate of the Internal Rif belt (Alboran domain, Morocco): hypothesis on their origin
Résumé
Granite pebbles from an Eocene or Oligocene conglomerate lying on a Ghomaride nappe of the
Internal Zones of the Rif belt (Alboran domain, Morocco) have been dated by U/Pb on zircon at 281 Ma. No
granite pluton being known in the Rif belt nor in the neighbouring Betic Cordillera, the origin of these calcalkaline
Kungurian (end of the Early Permian) granites is discussed. A provenance from a nearby unit
presently drowned in the Alboran sea is likely. Comparisons with other circum-Mediterranean domains
show that this late plutonism characterizes an original domain in the Variscan orogen.
Domaines
Géochimie
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