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• WHEXSIopeEvaluation AdrianBrown <br />2. GEOLOGY <br />The overall geology of the WHEX project area is presented in Plate 2. The geology of the mine is fairly <br />simple: the northern and western wall of the mine will be excavated in Cripple Creek Diatremal rocks <br />(volcanic phonolites and breccias) while the eastern wall will be excavated in Precambrian granite, <br />gneiss, and schist. <br />From a geomechanical point of view, the two principal materials that occur in the WHEX Mine are <br />significantly different: <br />1. The volcanic rocks are generally massive, moderate permeability, oxidized jointed, with <br />essentially random distributions of phonolite and breccia, interspersed with latite dikes and sills. <br />The only consistent structures in these rocks appear to be sub-vertical faults and joints, oriented <br />north-south. <br />2. The granitic rocks are generally massive, clayey, randomly fractured, with distinct foliation <br />dipping approximately to the northwest at angles between 30 and 70 degrees. <br />• <br />• <br />Report 1385L.200309017 3 <br />