Royston, Nevada

The Royston porphyry project is located in the Royston mining district of western Nevada, 30km NW of Tonopah. 

At Royston, a partially exposed quartz monzonite porphyry system extends beneath post-mineral volcanic and alluvial cover. Mineralization has been tilted ~50-70° W due to post-mineral extensional faulting. A central zone of strong to pervasive quartz-sericite-pyrite(ox) alteration is accompanied by highly anomalous base and precious metals anomalies, despite extensive surface leaching. 

Historic exploration at the project included mapping, rock chip geochemistry, various geophysical surveys (IP-MT, magnetcs, gravity), and drilling. Strong chargeability anomalies represent QSP zones in concealed host rocks and porphyries. Highly resistive, siliceous zones within the Mina Fm. also assist in interpretation of subsurface geology. A 5-hole recon RC drilling program confirmed the presence of a strongly westward tilted porphyry of significant scale.

In January 2025, EMX executed an option agreement for Royston with Pacific Ridge Exploration Ltd. During the earn-in period, the agreement provides EMX with cash payments, equity in Pacific Ridge, and required work commitments on the project. Upon option exercise, EMX retains a 3% NSR royalty, 1% of which may be bought back, in addition to AAR and milestone payments. 

*Nearby mines and deposits provide context for the project, but do not necessarily indicate similar size, styles or grade of mineralization within the project.

 

 

Maps

Geology and target area at Royston Click to Enlarge