Surface Sampling And Mapping At The Divide/Rock Creek Gold Prospects In Tuscarora

CALGARY – Crestview Exploration Inc. reported the results of the 2021 mapping and sampling program at the Rock Creek and Divide Mine gold prospects in Tuscarora, NV. Crestview’s Divide Mine prospect was mapped at a 1:2,000 scale, and additional surface chip and grab samples were collected at both Rock Creek and Divide. The 2021 sampling at the two prospects is comprised of 32 surface samples from faulted and fractured zones with strong alteration and mineralization envelopes (silicification, argillization and iron oxides).

Upon completion of the geological mapping at Divide, three conceptual targets are envisioned at the property: 1) blind veins and ore shoots in the volcanic package, 2) along the unconformity between the Tertiary volcanic rocks and the underlying Palaeozoic sedimentary rocks and 3) disseminated mineralization in the Palaeozoic siliciclastic rocks beneath the historic mine area.  

The geology of the Divide property includes Palaeozoic siliciclastic rocks and Tertiary volcanic rocks variably altered and mineralized along structures. The Tertiary volcanic package is exposed in the NE portion of the property, in the area of the historic Divide Mine. The Tertiary package can be divided into three groups: 1) intracaldera lithic-rich, rhyolitic ash-flow (Tct) which hosts mineralization; 2) poorly sorted megabreccia (Tbx); and 3) small post-mineralization dacite dikes (Tdd). The Palaeozoic package, exposed in the SW portion of the property, consists of siltstone (Pzs), bedded chert and orthoquartzite (Pzq).

In the area of the historic Divide Mine, precious metals were produced from a number of quartz-barite-Fe-oxide veins/structures that generally strike NE with steep dips to the NW. In addition, brecciated lithic rhyolitic ash-flow, cemented with quartz, barite, and iron oxides is also noted as a host for mineralization. Silicification is discontinuous along the vein, producing a highly siliceous and somewhat vuggy vein appearance. Illitic alteration is most intense along and near fractures and structures. Away from major structures, this alteration is weaker and usually preserving original textures. The highly deformed Palaeozoic siliciclastic rocks are exposed in the Dry Creek Mountain area and are host of two styles of mineralization: bedding-parallel in the thin bedded chert unit and along structures/fractures.

Jarosite and hematite are present and the primary sulfide is assumed to have been composed of pyrite and arsenopyrite (boxwork structures). A significant quartz-vein halo (which may reflect the top of a mineral system) sits at the top of the mountain along NE-trending, NW-dipping and NW-trending, SW-dipping trends that also reflect the two main fracture systems in the area. The intersection zone of both systems is centered on a recessive area with siltstone (Pzs), prominent quartz veins, and chrysocolla in the float.

An additional 23 samples were collected at the Divide Mine gold prospect in 2021, bringing the total number of surface samples collected at Divide to date to 53, with 14 samples containing greater than 0.1 g/t Au including 4 samples greater than 1 g/t Au. The 2021 sampling was focused in the SW portion of the property where the Paleozoic siliciclastic rocks are exposed at the surface.