VANCOUVER, British Columbia, March 06, 2018 (GLOBE NEWSWIRE) -- Millrock Resources Inc. (MRO.V) (MLRKF) ("Millrock") is pleased to report that the first phase of core drilling on the La Navidad gold project has been completed. The project, located in Sonora State, Mexico, 100 km north of the City of Hermosillo, targets orogenic gold deposits and is being funded under an option to joint venture agreement by Centerra Gold Inc. (“Centerra”). In total, 2,130 meters in 12 holes were drilled. The table following on the next page indicates significant and anomalous drill intersections.

Millrock President & CEO Gregory Beischer commented: “Some strong results were obtained in this program from the Anchor Zone. Drilling is tentatively planned to resume in April 2018 to test the large gold-in-soil anomalies of the Crossover and Cobre prospects that lie north and northwest of Anchor respectively.”

Anchor and Horseshoe Zone Drilling
Holes NAV-001, NAV-002, NAV-003, and NAV-010 returned strong results. All four holes fall on section line 520,700 and indicate mineralization in the shallow subsurface over a distance of 500 meters in a north-south direction. Holes NAV-004, NAV-005 and NAV-011, drilled 200 meters west on section line 520,500 were also strongly anomalous, extending mineralization in a westerly direction. Holes NAV-006, NAV-007, NAV-008 and NAV-009 which were drilled further west on section line 520,100 at the adjacent Horseshoe Zone returned weaker, narrower intersections. It had been hoped that the two zones would join together but they do not appear to do so. Therefore, the ability to build tonnage further west from the Anchor zone appears to be limited. The next exploration effort will work areas to the north and northwest where strong gold soil anomalies exist at the Crossover and Cobre prospects. Further mapping is underway in anticipation of the next drilling program.

Note: The mineralized intervals reported are down-hole, measured thickness. Based on initial interpretations it appears the mineralized zone dips shallowly to the north at 15 degrees. However, there is not enough geologic control at this point to verify the interpretation and therefore to make an accurate estimate of true width with confidence. For the composited values reported, a 0.1 gram per tonne gold cut-off was used, and a maximum allowable internal dilution thickness of 2.05 meters was used. See note below concerning quality control – quality assurance.

Since forming an option to purchase agreement with the underlying mineral right owner of La Navidad in June 2017, and a simultaneous option to joint venture agreement with Centerra, Centerra and Millrock have collaborated to execute a comprehensive exploration program. Initial surface exploration results were reported in this press release by Millrock. Centerra is funding the exploration work to earn an interest in the project.

The La Navidad project targets bulk mineable, run-of-mine, oxidized deposits that could be processed by heap leaching. The prospects at La Navidad bear the characteristics of an orogenic gold system similar in nature to other gold deposits being mined or developed in the district including:

• Lluvia de Oro (Metallōrum Holding);
• Santa Gertrudis (Agnico Eagle Mines Limited); and the
• San Francisco Mine (Alio Gold Inc.).

Alio Gold’s San Francisco Mine is a prime example of the type of deposit sought by Millrock and Centerra. On their website, Alio Gold reports Measured & Indicated Resources (inclusive of Reserves) of 74.8 million tonnes grading 0.541 grams per tonne gold, containing 1.3 million ounces of gold, and Proven & Probable Reserves of 54.8 million tonnes grading 0.527 grams per tonne gold containing 0.9 million ounces of gold.

Quality Control – Quality Assurance
Millrock adheres to stringent Quality Assurance – Quality Control (“QA/QC”) standards. Drill core and samples are kept in a secure location at all times. Representative half-core samples were collected in the core shed in Magdalena and assayed at the Bureau Veritas laboratory in Hermosillo, Mexico. Preparation and analysis methods are described in further detail here. The sample preparation method code utilized was PRP70-250. Analysis methods used include FA430 (30 gr/Fire Assay/AAS) and AQ-200 (Aqua Regia – ICP/MS). For every 20 rock samples a blank sample MEG-12.02 (>0.003 ppm Au) known to contain less than 3 part per billion gold and a standard sample (Certified Reference Materials – “CRM”) of known gold concentration was also analyzed. Three different CRM standards were utilized in this program including MEG-Au 11.15 (3.4 ppm Au), MEG-Au 12.11 (1.5 ppm Au) MEG-Au 13.01 (0.31 ppm Au). The following QA/QC protocols were used for this program: 1) Duplicates were created as coarse crush duplicates on every 20th sample in the sample preparation process at the laboratory, and 2) Blanks every 20th sample, and 3) CRM every 20th sample plus additional random insertions of standards and blanks at the supervising geologist’s discretion, and 4) core sample field duplicates.