Red and White Wadi (Cu, Au)
The Red and White Wadi area is located approximately 12 km southwest of Jebel Ohier. The area encompasses a set of broadly north-south trending wadis which was initially identified from stream sediment anomalies to both the northeast and southwest of the area. The colluvial within the wadi beds have been heavily exploited by artisanal miners. The Red and White Wadi area has been subject to geological mapping, rock chip geochemistry and trench sampling by QMSD. This work has identified several sets of narrow (but in places up to 1m across and over 250m strike length) epithermal-style quartz veins associated with north to northwest-trending faults and shear zones in strongly altered andesitic units. Samples have returned highly variable gold grades, including numerous samples at +100 g/t Au. In addition, rock chip samples containing grades as high as 1.86% Cu have been collected associated with altered andesite rocks. Anomalous gold, copper, silver and bismuth values have also been returned from samples across the wadis.
Lithogeochemical analysis of least altered andesites from Red and White Wadi indicates that these rocks have back-arc affinities. Based on the presence of volcanoclastic agglomerates, tuffaceous units, dacitic ignimbrites, intercalated carbonaceous shales and minor (diagenetic – epigenetic) carbonates, the depositional setting for the Red and White Wadi area is considered to be an emerging marine to sub-aerial back-arc system. The presence of epithermal-style veins and primary copper mineralization in propylitic-altered andesites above a strong elongated geophysical anomaly at Red and White Wadi points to the possibility of an intermediate (porphyry) intrusion at depth. Results from a reconnaissance RC drilling campaign in early 2018 are pending.