Golden Chest Open Pit Mining
Golden Chest – Open Pit Mining
NJMC began producing ore from its open pit mine in August 2016 from a starter pit defined by optimizing studies based on the Company’s extensive core drilling from 2011 and 2012. NJMC’s current open pit is located at the surface expression of the Golden chest Shoot, just northeast of the Skookum Shoot, the location of its underground mine.
In 2018, approximately 31,230 dry metric tonnes of open pit ore was processed at the New Jersey Mill with an average gold head grade of 3.47 gpt, resulting in the production and sale of 3,400 ounces of gold. Open-pit mining progressed from the 1042 bench to the 1012 bench during the year with mine production averaging 1,250 tonnes per day (ore and waste). In addition to the ore shipped to the mill, a lower grade stockpile was established on-site, containing approximately 150,000 tonnes of material at an estimated gold grade of 0.75 gpt Au.
An aerial survey of the mine was recently completed in preparation for pit expansion engineering studies. The Company will continue to evaluate the possibility of expansion as the pit is advanced.