North Zone
Overview
The North zone of the Iceberg gold deposit is primarily near-surface oxide mineralization which is hosted principally in the Devonian Horse Canyon and Wenban formations, the same formations that hosts mineralization at Barrick’s nearby deposits including Goldrush and Cortez Hills. Recent drilling indicates that the North zone is likely linked to the nearby Serena zone to the west while geophysical and geochemical techniques have identified further areas for expansion of the mineralized footprint.
Geology
The North zone of the Iceberg gold deposit is characterized by ~20-30 m of post mineral basaltic volcanic flows interpreted to be related to the Miocene Northern Nevada Rift, overlying an ~40-50 m thick sequence of Tertiary sediments and tuffaceous volcaniclastics, which in turn, unconformably overlie Devonian carbonates of the Horse Canyon and Wenban formations. The major structural trends of the North zone are north-northwest trending, west dipping normal faults cross cut by the west-southwest striking, north dipping Long Fault. North Zone mineralization is hosted in strongly oxidized stratabound jasperoids and dissolution breccias along the Upper Wenban-Horse Canyon contact where drilling has encountered multiple intercepts with greater than 10 g/t Au. The mineralization in these jasperoids is closely associated with gently west dipping strongly argillized Intermediate intrusions of unknown age. There are locations in the North zone where gold mineralization with grades up to 5 g/t Au occurs in Tsv near the contact with underlying Dhc.
