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Location: 40 km SW from Meknès, Morocco
Level 4, 100 Albert RoadSouth MelbourneVictoria, Australia3205
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The Achmmach tin deposit is hosted within the turbiditic sediments of the Namurian aged Fourhal Formation. The Fourhal Formation consists of deformed, interbedded pelites and psammites of lower carboniferous age. These meta sandstones and shales comprise a tightly-folded sequence of turbidite beds, overprinted by tourmaline alteration within sheared regions and intruded by magmatic sills.Mineralisation is localised in two subparallel ENE striking lodes named the Meknès and Sidi Addi Trends, separated by a distance of approximately 500 m. The largest part of the resource comprises the Meknès Trend. The mineralisation to be mined within the Sidi Addi Trend is referred to as the Western Zone. It is developed within the tourmaline-silica altered metasediments. Tin mineralisation occurs primarily as cassiterite with minor stannite.The Achmmach tin deposit is hosted within a sedimentary sequence of turbidite beds that vary from thin-bedded to graded-bedded cyclic. Tourmaline-silica breccias were formed during subsequent deformation, and following this a number of pulses of mineralisation occurred, with the tin mineralisation preferentially (but not always) precipitating in the pre-existing tourmaline silica breccias. The tin occurs as disseminated cassiterite (SnO2) associated with sulphide and/or quartz veins. Overall tin mineralisation at Achmmach extends 1.6km in strike length, is 300m wide and extends from the surface to 600m below the surface. The high-grade parts of the Meknes and Fez zones, which are of the most interest, are 400m in strike length, 200m wide and located from 150m below surface to 400m below surface.
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