233263 Permit (Ag, Au, Cu, Pb, Zn)
The Permit #233263 exploration area is located in the Proterozoic Saghro “boutonnière” of Morocco’s Sub-Atlas Range about 260 kilometres east of Marrakech and just five kilometres south of the world class Imiter Mine (Figure 1).
The property consists of one exploration permit with an area of 16km² (Figure 2).
The distance from Ouarzazate, the provincial capital, to Imiter is approximately 120 kilometres. Roads from Imiter village lead to both the southern and northern extents of the property, both less than 20 kilometres away.
The 233263 permit area is underlain by the Ouarzazate Supergroup which consists of the Jbel n’Habab complex; an assemblage of andesitic to dacitic lavas and tuffs (570 Ma) overlain by the by the Takhatert complex including ignimbrites, conglomerates and pyroclastic rocks (550 Ma).
The Takhatert complex is similar in age to the PIII rhyolites, porphyres and ignimbrites associated with the Bou Madine (Au, Ag, Cu, Zn and Pb) deposit (554 Ma) located 80 km to the east in the Ougnat “boutonnière”.
The main Au, Ag, Cu, Zn and Pb mineralization is related to brecciated and cataclastic limonitized, hematized and silicified zones carrying galena, sphalerite and chalcopyrite (Figure 3).
Throughout the rhyolites, rhyolitic tuffs and ignimbrites of the Takhatert complex, numerous quartz-iron oxide veins are exposed in trenches which are mineralized in Cu (chalcopyrite, chalcosine, azurite and malachite), Pb (galena), Zn (spahlerite) ± Ag ± Au (Figure 4).
Geological and Structural Framework
The Neoproterozoic rocks are divided into two lithostratigraphic units: 1) the Anti-Atlas Supergroup, including the Saghro Group (PI; 661-762 Ma) and 2), The Ouarzazate Supergroup (PII), a late syn- to post-tectonic, continental volcanic and clastic sequence, associated with high-K calc-alkaline to shoshonitic and alkaline magmatism (600- 531 Ma). In the Imiter area, the PI assemblage is represented by sandstone, siltstone, quartzite, pelitic sandstone, black clay and tuff (Izemgane Formation). The sediments are intruded to the north by the Neoproterozoic (PII) Taouzzakt and Bouteglimt plutons. The Ouarzazate Supergroup consists of the Jbel n’Habab complex; an assemblage of andesitic to dacitic lavas and tuffs (570 Ma) overlain by the Takhatert complex including ignimbrites, conglomerates and pyroclastic rocks (550 Ma) (Figure 2). The volcanosedimentary assemblages are commonly intruded by NS to N40°-oriented dykes related to the granitic plutons and by Jurassic dolerite dykes. Rocks of the Permit 233263 property were affected by the Panafrican tectonism and are folded into large anticlines (D1). A strong S1 schistosity (NE-SW-oriented) dips steeply to the north. D2 tectonism is associated with fracture schistosity and forms N110°-N130° folds with NW-plunging axes. Two major fault system one oriented NE-SW, parallel to S1, and the other N-S are visible on the property.
Ciesielski et al. (2011) described an Au, Ag, Cu, Zn and Pb mineralization related to brecciated and cataclastic limonitized, hematized and silicified zones carrying galena, sphalerite and chalcopyrite (Figure 3). One zone extends for at least 700 meters and varies in width from 1-2 m, locally up 10 metres. There is a highly brecciated and altered corridor that locally shows decimeter-size quartz veining with pseudo-crustiform or ribbon structures with fragments of dolomite and brecciated hematitic dolomite. Assay results from eight rock samples collected by Ciesielski et al. reveal moderate concentrations of precious metals: Ag =1 to 27 g/t and Au=0.021 to 2.78 g/t. Three high Pb (1.18 to 2.76 wt. %) and Zn (0.83 to 1.80 wt. %) values are reported.
The rhyolite, rhyolitic tuffs and ignimbrites of the Takhatert complex expose several quartz-iron oxide veins which are mineralized in Cu (chalcopyrite, chalcosine, azurite and malachite), Pb (galena), Zn (sphalerite) ±Ag±Au (Figure 4). Numerous trenches and small pits were investigated. One sample of a quartz-carbonate-hematite-goethite vein enriched malachite-azurite-hematite+pyrite±galena collected from a recently dug pit provided the following assays: 0.12 g/t Au, 29 ppm Ag, 2.10 wt. % Cu, 0.25 wt. % Pb and 0.03 wt. % Zn.
In 2012, 62 kilometres of grid lines covering the central part of the permit were submitted to an induced polarization/resistivity survey. There are two main geophysical domains revealed by the IP contours reflecting a change in lithologies (Figure 5). The transition between the two domains is defined by a NNE-SSW-oriented structure. Several IP axes are observed near the NE breccia zone recognized by Ciesielski et al. (2011). They may reveal potential polymetallic mineralized zones. In general, IP inversion models indicate near surface or shallow depth anomalous areas (Simard, 2011).
In 2011, trenches, small shafts and adits were discovered in several areas of the property. The excavations mainly investigated hematized-quartz-carbonate veins containing malachite, azurite, galena and sphalerite. No record of past exploration is available.