Based upon historic drilling and Company drilling from 2010 to 2017, a maiden mineral resource estimate was presented for the North Bullion Deposit as of September 15, 2017, in accordance with NI 43-101 regulations and using the CIM Definition Standards for Mineral Resources and Mineral Reserves.
The Drill Hole Assay Tables include highlights of the company’s drilling programs at North Bullion since 2010. New drilling is scheduled for 2019.
Key Highlights from recent North Bullion drilling:
The North Bullion Deposit resources have been estimated within three dimensional solids that were created from cross-sectional lode interpretation based upon a database of 503 drill holes that were used to guide the geological and mineralization interpretation. The upper contact has been cut by the topographic surface. Grade estimation was based upon 6,941 samples from 232 holes that are within the mineralized lodes. Grade was estimated into a block model with parent block size of 10m (X) by 10m (Y) by 3m (Z) and sub-blocked down to 5m (X) by 5m (Y) by 1.5m (Z). A total of 272 bulk density samples situated within the mineralized wireframes were examined on a lode by lode basis. The average density for the lodes ranges from 2.33 grams per centimeter cubed (g/cm3) to 2.71 g/cm3 with an overall average bulk density of 2.68 g/cm3. Grade estimation of gold was performed using the ID2 methodology. The Indicated and Inferred Mineral Resources are constrained within a drilled area that extends approximately 2.75km along strike to the north, 0.95km across strike to the east and up to 600m below surface. The Sweet Hollow and POD oxide Indicated and Inferred Mineral Resource uses a cut-off grade of 0.14 g/t Au, which is constrained within an optimized pit shell and includes an Indicated Mineral Resource of 2.92 million tonnes at 0.96 g/t Au for 90,100 ounces of gold and an Inferred Mineral Resource of 3.36 million tonnes at 0.43 g/t Au for 46,600 ounces of gold. The North Bullion, Sweet Hollow and POD sulphide Inferred Mineral Resource uses a cut-off grade of 1.25 g/t Au, which is constrained within an optimized pit shell, and is comprised of 2.05 million tonnes at 2.60 g/t Au for 171,400 ounces of gold. The North Bullion underground Inferred Mineral Resource, which is reported at a 2.25 g/t Au lower cut-off grade, comprises 5.55 million tonnes at 3.29 g/t Au for 587,700 ounces of gold. The pit constrained and underground constrained block modeled resources utilize a price of $US1,350/ounce for gold along with a number of generalized costs for NV Carlin-type mining operations to establish the recommended lower cut-off grades. The classification of these resources was based on geological confidence, data quality, data density and grade continuity.
Indicated and Inferred Mineral Resources are not Mineral Reserves and do not have demonstrated economic viability. There has been insufficient exploration to define the Inferred Mineral Resources as a Measured Mineral Resource, as defined according to CIM definition standards, however, it is reasonably expected that the majority of the Inferred Mineral Resources could be upgraded to Indicated Mineral Resources with continued exploration.
On November 15, 2017, the Company announced results from 8 exploration scout holes completed west-northwest and north of the North Bullion Deposit.
- Core hole RR17-06 intersected 41.7m of 1.91g Au/t, including a higher-grade zone of 7.6m of 6.32g Au/t. Mineralization is mixed oxide and sulfide and hosted in decalcified and variably silicified multilithic collapse breccia (mlbx), and underlying dolomitic breccia. The mlbx developed at the top of the Devonian Devils Gate Limestone is the preferred host for lower zone gold mineralization at North Bullion.
- The RR17-06 intercept is approximately 375m west-northwest of the closest mineralized drill hole, RR16-01. RR17-06 was designed to test a west-northwest striking trend of higher-grade gold mineralization, in a new structural block, hanging wall to a northeast-striking fault. This is the first gold intercept in this structural block and the intercept remains open in all directions.
- Due to poor downhole drilling conditions, the core portions of holes RR17-04, -07, -09 ended before fully testing their intended targets. Drillers will attempt to re-enter and complete RR17-09 later this year.
Drill Hole Assay Tables*
- Drill Table 2010 North Bullion
- Drill Table 2011 North Bullion
- Drill Table 2012 North Bullion
- Drill Table 2013 North Bullion
- Drill Table 2016 North Bullion
- Drill Table 2017 North Bullion
*The gold intervals reported in these assay tables are based on a 0.14 gpt Au cut-off. Weighted averaging has been used to calculate all reported intervals. The reported gold intervals may, or may not represent true thicknesses and, or widths. In general, the gold distribution within these large, complex breccia bodies tends to be irregular and will require additional drilling to establish true widths. Sampling Methodology, Chain of Custody, Quality Control and Quality Assurance: All sampling was conducted under the supervision of the Company’s project geologists and the chain of custody from the project to the sample preparation facility was continuously monitored. A blank or certified reference material was inserted approximately every tenth sample. The North Dark Star core and RC samples were delivered to Bureau Veritas Mineral Laboratories preparation facility in Elko, NV. The samples are crushed, pulverized and sample pulps are shipped to Bureau Veritas certified laboratory in Sparks, NV or Vancouver, BC. Pulps are digested and analyzed for gold using fire assay fusion and an atomic absorption spectroscopy (AAS) finish on a 30-gram split. All other elements are determined by ICP analysis. Data verification of the analytical results includes a statistical analysis of the standards and blanks that must pass certain parameters for acceptance to insure accurate and verifiable results.
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