17 March 2015
Martha Open Pit Mine Operated by Newmont Mining Company
The Martha Mine is situated in the Waihi township of New Zealand, and the processing plant, waste rock embankments, water treatment plant and Favona Mine are located two kilometres away in a rural area.
Mining at Martha is by open pit methods. Ore and waste rock are crushed at the surface facilities area prior to transportation along a 2.7 kilometer conveyor. On arrival at the processing plant gold and silver are extracted from the ore using conventional carbon-in-pulp treatment methods. Waste rock is used to construct an engineered earth embankment to contain the tailings. A water treatment plant treats excess water prior to discharge.