Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5785758 | Journal of African Earth Sciences | 2017 | 29 Pages |
Abstract
All the deposits are coeval and were formed at the end of the post-collisional stage (530-520 Ma). InHoggar, gold mineralization depend on a double control, first order giant sub-meridian shear zone control and the gold districts disposed in N40°-50°E corridors that may be interpreted as extensional. Indeed, the Hoggar gold province appears to have been controlled at all scales by the late transtensive reactivation of the Pan-African mega-shear zones, and by the correlative heat flux associated with the linear lithospheric delamination processes accompanying this reactivation; which are also responsible for the very lateHoggar magmatic events. At Amesmessa, gold deposition was promoted by the mixing of metamorphic fluids issued from the In Ouzzal Archean-Proterozoic basement with magmatic, basinal and meteoric-derived water. These deposits and occurrences contains variable minerals and trace elements in order of decreasing importance: Pb, Zn, Cu, Ag, Bi, W, Te,Co, Cr, Mo, Ni, Nb, Ta, U, Hf, REE, PGE.
Related Topics
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Geology
Authors
Djamal-Eddine Aissa, Christian Marignac,