The Sawmill Canyon porphyry copper prospect lies within the Ellison mining district in White Pine County, Nevada. Historical exploration focused largely on surficial copper mineralization and jasperoid‑hosted gold mineralization, with work being limited to artisanal copper production, trenching, and shallow drilling. However, Nevada Legacy’s perspective is that Sawmill Canyon is permissive for a concealed porphyry copper system, evidenced by the presence of a porphyritic intrusive suite as well as noteworthy copper mineralization hosted within intrusive breccia, intrusive-hosted quartz veins, and favorable carbonate layers. Nevada Legacy grab samples returned up to 17% copper with 980 g/t silver as well as 5.8% copper with 1.4% zinc, 81 g/t silver, and 0.16 g/t gold.

Sawmill Canyon bears geological resemblance to the Robinson deposit (~5 billion lbs cumulative copper production), which lies near the town of Ely, NV, about 40 kilometers north of Sawmill Canyon. Mineralization at Robinson is centered on quartz porphyry intrusions emplaced into Paleozoic carbonate units, with extensive skarn development occurring along intrusive contacts and grading outward into marble. Mineralization is hosted within the causative intrusions as well as replacing surrounding carbonaceous host rocks. All of these geological characteristics are likewise present at Sawmill Canyon. The principal distinction between the two areas may be the level of exposure—at Sawmill Canyon, the preserved mineralization and alteration are interpreted to represent a higher structural level of the system, with the porphyry copper core remaining concealed at depth.

Sawmill Canyon satisfies the principal geologic criteria for the presence of a porphyry copper system, including a fertile intrusive suite, reactive carbonate host rocks, skarn development, and appropriate metal associations (Cu-Ag-Zn-Au-F). Nevada Legacy hypothesizes that the system is mostly preserved with potential for a concealed porphyry stock, which is supported by the observation that a quartz latite breccia outcropping in the vicinity of the copper showings contains various types of lithic clasts, including clasts of copper mineralization, that have been sourced from depth. This could represent a late-mineral breccia pipe that has cross-cut the main causative intrusion. Because of the absence of previous deep drilling, the hypothesis of a copper‑rich porphyry core remains untested.