Location and Access
The Nyala Property is located in Nye County, NV 84 miles east of Tonopah. It is on the eastern slopes of the Quinn Canyon Range at an average elevation of 6200 feet.
An unmaintained dirt road leads directly to the property. A maintained gravel road is two miles away.
Little records of early mining in the Nyala area can be found. The first discovery occurred in 1911 and a small production of 40 tons containing about ½ oz/ton gold and 60 oz/ton silver is documented. Intermittent mining took place until the late 1920s. It is likely that the distance from other mining districts and ore processing facilities hindering development.
In the 1980s the USGS conducted extensive sampling and surveying of the property area.
Precious metal deposits in the Quinn Canyon Range formed when Paleozoic sedimentary rocks were intruded by sulfide bearing solutions and granite and rhyolite dikes.
In Nyala Canyon, Cambrian limestones and dolomites are cut by gold- and silver- bearing quartz veins and fault zones. Some of the limestones have been heavily silicified. The structures strike northeast to northwest and dip steeply; vein thicknesses vary but are generally less than 4 feet. Granitic dikes have intruded the limestones forming marble and localized skarns. Arsenopyrite is common, and sometimes occurs with sphalerite and galena. Oxidized and leached sulfides have formed gossans.
Two adits, 9 shafts and 23 prospect pits were dug on northeast- to northwest- trending quartz veins and fault zones. Granitic dikes have intruded into the limestones forming marble and weak zones for the emplacement of quartz veins. Arsenopyrite is abundant, along with sulfides, and is common to the veins and the intrusives.
Hill (1916) described the Rustler Mine and the Queen of the West prospect in the general area of Nyala Canyon, as replacement arsenopyrite and silver 18 deposits in limestone along bedding planes. The information by Hill was not enough to determine the exact location of the discussed sites.
At the shafts in-place sampling of mineralized material could not be reached from the surface but abundant vein material was on the dumps. A select sample of sulfide-bearing quartz (table 3. no. 178) assayed 0.47 oz/st gold and 2.5 oz/st silver. A l-ft-long chip sample of gossan (no. 165) contained 0.39 oz/st gold and 0.4 oz/st silver.
In the west part of these workings. a 140-ft-adit was driven on a sulfide-bearing quartz vein (fig. 5C. 0). This may be the Rustler Mine of Hill (1916). as arsenopyrite was abundant here. A 2-ft-long chip sample (no. 151) of the vein assayed 0.26 oz/st gold and 1.5 oz/st silver.
Other quartz veins and gossan zones contain concentrations of precious metals. Base metal concentrations were not as consistent as the precious metals but were higher than background.
A select sample of massive arsenopyrite (fig. 5C. no. 166) contained 8.2 percent lead. Another arsenopyrite sample (fig. 50. no. 149) contained 7.2 percent zinc. Concentrations of cadmium, nickel, and antimony are randomly distributed in samples.
Approximately 1/2 mile east four samples along the 45-ft-long drift on the fault assayed from 0.02 to 0.21 oz/t gold and 1.2 to 13.9 oz/t silver. Along the 30-ft-long drift on the quartz vein, three samples contained from 0.03 to 0.05 oz/st gold and 4.0 to 32.9 oz/t silver. Arsenic, lead, and zinc concentrations were relatively high in the fault and vein, as were concentrations of the trace elements barium, cadmium and antimony.
It was concluded by the geologists who explored the property that “identified” resources of 50,000 tons grade 0.26/ton gold in one area assuming a 50 foot depth. Additional resources may exist deeper and in other parts of the property.
Sample results and survey maps are shown in the gallery below.