A diamond drilling programme at the Silver King project in Arizona's Pioneer Mining District has confirmed extensive quartz veining and visible silver-bearing sulphides, suggesting a deeper copper system.
The Vancouver-based company said every hole successfully intersected the targeted quartz-vein and stockwork system within the pipe-like structure, confirming the accuracy of historical data and the Prismo's 3D geological model of the underground workings. Prismo Metals drilled eight holes totalling 1272m of core.
CEO Alain Lambert said after the first six shallow holes showed positive, a seventh hole was drilled to depth.
"Hole 7, which was originally going to be part of Phase 2, significantly added to our understanding of Silver King, providing our first clear indication of a possible copper-bearing system at depth," he said. "What began as a high-grade silver opportunity is now demonstrating clear links to what could ultimately be a much larger prize: a deeper copper system."
SK-26-07 reached a depth of 1600ft (488m) and intersected quartz veining and stockwork below the historic 700–800 deepest level of the mine.
Discovered in 1875, the Silver King mine was Arizona's first and one of its most important historic silver producers, yielding nearly six million ounces of silver. The Silver King mine sits 3.4km from the main shaft of the Resolution Copper project, one of the world's largest unmined copper deposits with an estimated resource of 1.787mt billion.
