Structural analysis of tin-bearing mineralization in Bou El Jaj district (Hercynian Central Massif,Morocco) |
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| Authors: | El Mustapha Seghir Hmidou El Ouardi Jeffrey Lindhorst |
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| Institution: | 1.CartoTec Research group, Department of Geology, Faculty of Sciences,Moulay Ismail University,Meknes,Morocco;2.Kasbah Resources Limited,Applecross,Australia;3.Gruvan Group International,Kigali,Rwanda |
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| Abstract: | The aim of this paper is to characterize the geological setting of tin-bearing mineralization at the Bou El Jaj (BLJ) sector, located in the NE termination of the Moroccan Central Massif, South of Meknes city, along the NE-SW-striking shear zone. The main tin mineralization corresponds to a NNE-SSW altered corridor of tourmaline, about 10 to 12 km long, from BLJ to Achmmach mount. The geological structures are affected by three ductile deformation phases D1, (E-W shortening), D2 (NW-SE shortening), and D3 (N-S shortening), overprinting folds, and one brittle deformation event D4 (NW-SE shortening), which was synchronous with alteration and mineralization. The tourmaline-altered sediments occur in two parallel veins, about 2.5 km long and 200 m wide for each one, and are controlled by structures such as bedding, main cleavage, thrusts, and joints. Tin mineralization as cassiterite is always associated with tourmaline alteration and is controlled by the different structures. |
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