In 2011 the discovery of the Red Hill and Goldrush deposits was announced by Barrick. The two deposits are located four miles southeast of the Cortez Hills mine and 15 mi southeast of the Pipeline mine.

Based on the results of wide spaced drilling, Barrick originally outlined two zones of gold mineralization along a seven kilometre long trend. The mineralization is primarily hosted in a favorable carbonate unit and has a tabular geometry. Host rocks are similar to those found at Barrick’s Cortez Hills and Goldstrike mines. The majority of the mineralization intersected to date is refractory and occurs at depths between 150 m and 500 m. Continued drilling of the mineralization has shown that the two deposits are in fact joined. As a result, the deposit has been renamed Goldrush, which includes both Red Hill and the original Goldrush deposits.

Refractory ore would be transported to Goldstrike for processing.

Refractory ore would be transported to Goldstrike for processing.

Goldstrike process facilities provide the capability to treat single refractory ore (sulphidic) and double refractory ore (sulphidic and carbonaceous) through roasting or pressure oxidation. The roaster circuit accommodates Goldstrike open-pit and underground ore as well as Cortez Hills Open Pit (CHOP) and Cortez Hills Underground (CHUG) ore. A blended feed to the roaster is required to control the circuit heat balance. Pressure oxidation also receives a blended feed from stockpiles and operates as either alkaline or acid POX dependent upon feed carbonate/sulphide ratios. Pressure oxidation is followed by CaTS leaching, also referred to as the Thiosulphate Leach Conversion (TLC) with an RIL adsorption circuit for gold recovery. Respective facilities include:

1. An autoclave circuit consisting of:
• Primary crushing
• Two parallel SAG Mill-Ball Mill grinding circuits with pebble crushing