#Canada #Vancouver #Nevada King #Atlanta Gold Mine #Metallurgical Testing

Nevada King Gold Reports Positive Phase 2 Metallurgical Test Results at Atlanta

On July 16, 2025, Nevada King Gold Corp (TSXV: NKG, OTCQB: NKGFF) proudly announced promising results from its Phase 2 metallurgical testing at the Atlanta Gold Mine project. Situated in the Battle Mountain Trend, the Atlanta project spans 12,000 hectares and is entirely owned by Nevada King. This recent phase of testing builds upon the findings from Phase 1 which were released on March 26, 2024, confirming the project's potential for utilizing conventional oxide processing methods.

Test Results Highlights

The results from both phases of testing have demonstrated remarkable gold recoveries. For example, fine milling (200-mesh grind) showed weighted average gold extractions of 90.1% for non-silicified volcanics, 86.1% for silicified volcanics, and 87.7% for silica breccia (SBX). Additionally, traditional column leaching methods indicated a weighted average extraction of 83.1% for non-silicified volcanics.

The testing confirms the feasibility of a development path that employs conventional milling for high-grade materials while using run of mine (ROM) heap leaching for lower-grade non-silicified volcanics.

Simplified Flowsheet

In a move towards operational efficiency, the updated flowsheet proposed after Phase 2 metallurgical testing is more straightforward, likely resulting in decreased operating and capital costs. Notably, the flow sheet eliminates the previous three-stage crushing requirement in favor of a primary and secondary crushing process, thus streamlining the ore processing procedure.

The testing involved 26 drill core composites in Phase 2, expanding upon the 22 composites plus three bulk samples analyzed in Phase 1. This enriched dataset allows for a comprehensive understanding of the various lithologies and respective grade ranges across the Atlanta resource.

Expert Supervision

Gary Simmons, a seasoned metallurgist and former Director of Metallurgy and Technology for Newmont Mining Corp, supervised the Phase 2 testing program. His input has been integral to refining the conclusions from Phase 1. Simmons emphasized that the results reaffirm the appropriateness of conventional milling techniques for processing the various mineralization found throughout the Atlanta project.

Understanding the Material Types

The Atlanta resource can generally be categorized into two main groups for the metallurgical testing: the SBX material, located in and below the main unconformity, and the volcanics situated above it. With 17 out of the 26 composites in Phase 2 coming from SBX material, the testing was focused on understanding the unique metallurgical characteristics of this rock type, which is known for its hard and abrasive nature.

The findings indicated that while the SBX material is best suited for high-pressure grinding rolls (HPGR) and subsequent fine milling, the non-silicified volcanics demonstrated less sensitivity to feed particle size, making them suitable for traditional milling or heap leaching processes.

Financial Implications

Overall, the promising Phase 2 results affirm the work completed in Phase 1 and suggest that the Atlanta Gold Mine has the potential for economically viable gold extraction through conventional methods. Gold extraction rates have remained robust, reinforcing the suitability of conventional cyanidation methods for all tested lithologies.

As Nevada King Gold continues its commitment to optimizing the Atlanta Gold Mine project, these metallurgical advancements pave the way for further exploration and development activities to sustain and potentially expand mineral resources. The focus now shifts to leveraging these results to advance the project forward and ensure ongoing operational efficiency.

The comprehensive details from the testing program, including QA/QC protocols, were thoroughly documented to ensure reliability and integrity. As Nevada King Gold progresses, stakeholders remain optimistic about the potential of the Atlanta project, readying themselves for the next steps in this exciting venture.