The North Bullion deposit is located in the northern portion of the Railroad property, centered on the 4th and southernmost dome on the Carlin Trend. North Bullion was discovered in 2010 and the gold system remains open in all directions. North Bullion exhibits all the classic characteristics of large, high-grade collapse breccia hosted gold deposits on the Carlin Trend. Unlike GSV’s Dark Star and Pinion deposits which are highly oxidized, gold-bearing rock at North Bullion is refractory in nature but the additional cost of processing this material is commonly offset elsewhere on the Carlin Trend by increased grade.
Gold Standard has announced its maiden resource estimate for North Bullion in 2017 (please see press release dated September 21, 2017) and will be drilling 6,700m at North Bullion in 2017 to test for potential further expansions.
North Bullion Key Highlights
- Discovery of a new, concealed refractory gold deposit by Gold Standard in 2010.
- Gold is hosted in two breccia zones in the footwall of the north-striking Bullion Fault Corridor.
- Higher gold grades in holes RR13-08 and RR13-11 indicate a possible WNW-trending feeder.
- Both the WNW and N-S zones remain open in all directions.
- Greater than 3g Au/t zone strikes west-northwest: 150m wide x 250m+ long
- Greater than 1g Au/t zone strikes north-south: 300m wide x 1,200m+ long
- Initial metallurgical tests indicate the mineralization is conducive to roaster processing, with gold recoveries ranging from 78% to 90%1.
The North Bullion, POD & Sweet Hollow deposits Maiden resource estimates
- At North Bullion (and including a minor contribution from Sweet Hollow and POD), APEX has estimated a near surface (pit constrained) sulphide Inferred Mineral Resource of 171,400 troy ounces of gold contained in 2.05 million tonnes at an average grade of 2.6 g/t Au (at a cut-off of 1.25 g/t Au). No mineral resources have previously been reported for the North Bullion deposit.
- Also at North Bullion, APEX has estimated a deeper (underground) sulphide Inferred Mineral Resource of 587,700 troy ounces of gold contained in 5.55 million tonnes at an average grade of 3.29 g/t Au (at a cut-off of 2.25 g/t Au).
- At Sweet Hollow and POD, APEX has estimated a new near surface oxide Indicated Mineral Resource of 90,100 troy ounces of gold contained in 2.92 million tonnes at an average grade of 0.96 grams per tonne (g/t) gold (Au) (at a cut-off of 0.14 g Au/t). No mineral resources have previously been reported for these deposits.
- Also at Sweet Hollow and POD, APEX has estimated a near surface oxide Inferred Mineral Resource of 46,600 troy ounces of gold contained in 3.36 million tonnes at an average grade of 0.43 g/t Au (at a cut-off of 0.14 g Au/t).
1 Gold Standard has not performed any preliminary economic assessment or other study of the North Bullion deposit and these metallurgical test results do not constitute and must not be construed as an economic analysis of the potential viability of the North Bullion deposit.