Pearl String

Pearl String
Nevada, U.S.

Multiple untested high-sulphidation epithermal targets in the Walker Lane

Pearl String location map


The approximately seventeen square kilometre Pearl String project currently consists of 201 claims on land managed by the BLM in Mineral County, Nevada within the prolific Walker Lane trend.


The Pearl String project is prospective for high sulphidation epithermal gold deposits. The project area encompasses the northwestern margin of a 25-kilometre-long zone of magmatic hydrothermal alteration that has been dismembered by post-mineral right lateral strike slip faults. The southeastern margin of the zone hosts the Isabella Pearl Mine, one of Nevada’s newest heap leach gold operations.

Orogen’s claim position covers two targets separated by the post mineral Gumdrop Hills fault. The eastern target is focused on a three-kilometre-long normal fault. The fault zone has illite altered granite in its footwall and quartz-alunite altered tuff in the hanging wall. The quartz-alunite altered tuff is consistently elevated in gold with select samples returning up to 12.0 g/t gold.

The western target covers approximately eight square kilometres with quartz-alunite altered tuff surrounding a shallow zone of post mineral alluvium. A 2020 ground magnetics survey completed by Orogen defined multiple large magnetic lows (principally a northern and southern cell) which may be zones of more intense alteration representing feeder zones for the high sulphidation system.

The property was previously optioned to Barrick Gold (2022 to 2024) who completed a ten hole approximately 3000 metre drill programs in two fences testing the southern magnetic low in Orogen’s western target. The holes all intersected alteration and pathfinder geochemistry indicative of the peripheries of a high-sulphidation epithermal system with weakly anomalous precious metal values.

Barrick’s drilling did not test the northern magnetic low or the eastern target zone.