Les minéralisations Cu-(Ni-Bi-U-Au-Ag) d'Ifri (district du haut Seksaoua, Maroc) : apport de l'étude texturale au débat syngenèse versus épigenèse.
The Cu---(Ni---Bi---U---Au---Ag) mineralization of Ifri (‘Haut Seksaoua' district, Morocco): contribution of a textural study to the discussion syngenetic versus epigenetic

Luc Barbanson (1) , Alain Chauvet (2) , Aziz Gaouzi (3) , Lakhifi Badra (3) , Mohamed Mechiche (4) , Jean-Claude Touray (1) , Saïd Oukarou (4)

1 ISTO - Institut des Sciences de la Terre d'Orléans
2 LDL - Laboratoire Dynamique de la Lithosphère
3 Département de géologie
4 Snarema

The Cu ore of Ifri is a chalcopyrite stockwork hosted by Cambrian formations and was until now interpreted as a syngenetic massive sulphide deposit. Textural studies highlight two generations of pyrite early (Py I) and late (Py II) with respect to the regional deformation. The chalcopyrite stockwork overprinted Py II, outlining the epigenetic nature of the Cu mineralization. Regarding the origin of Cu-depositing fluids, the presence in the stockwork paragenesis of an U, W, Sn association and preliminary Pb/Pb dating of a brannerite belonging to this association suggest a contribution of the Tichka granite.

Keywords: copper; pyrite; stockwork; shearing; Late Hercynian; High Atlas; Morocco

Domains: Mineralogy

Luc Barbanson, Alain Chauvet, Aziz Gaouzi, Lakhifi Badra, Mohamed Mechiche, et al.. Les minéralisations Cu-(Ni-Bi-U-Au-Ag) d'Ifri (district du haut Seksaoua, Maroc) : apport de l'étude texturale au débat syngenèse versus épigenèse.
The Cu---(Ni---Bi---U---Au---Ag) mineralization of Ifri (‘Haut Seksaoua' district, Morocco): contribution of a textural study to the discussion syngenetic versus epigenetic. Comptes Rendus Géoscience, 2003, 335, pp.1021-1029. ⟨10.1016/j.crte.2003.07.006⟩. ⟨hal-00069476⟩