antelope map
Figure 1. Location map for the Antelope Project

Antelope is an intermediate stage exploration project located in White Pine County, Nevada, 72 air kilometers northeast of Ely. The property consists of 47 unpatented lode claims.  Four modern gold mines, including Alligator Ridge, Bald Mountain, Golden Butte, and Kinsley Mountain, are located within an 80 kilometer radius of these claims.   Extensive rock and soil sampling was conducted by Amselco and Phelps Dodge in the late 1980s, identifying a zone of anomalous gold that is approximately 2,000 x 900 meters in extent. In 2005, Dumont Nickel conducted an extensive soil-sampling program, but did no drilling.

Antelope is best described as a sediment-hosted, Carlin-type gold system.  Gold is concentrated in the lower portion of the Pilot Shale in highly silicified sediments (jasperoid).  Significant concentrations of gold occur in two jasperoid zones which are part of a gently west-dipping sequence of limestone, siltstone and dolomite. Tertiary igneous rocks are present, although limited to relatively narrow, northwest trending quartz monzonite dikes. Gold grades are elevated along dike/sediment contacts as well as in proximity to steep, northwest-striking faults.

The jasperoid targets are open down-dip under shallow cover to the west.  A ground gravity survey carried out by Pilot Gold suggests that the pediment cover remains shallow for at least 1 km in that direction, and also shows the presence of gravity lows to the southeast of the drilling which may be due to alteration at depth.  The eastern targets, together with the northwest extensions of the fault/dyke zones under cover, present easy targets to test with a relatively small number of drill holes.

The property consists of 47 unpatented lode claims, located on public lands administered by the U.S. Bureau of Land Management ("BLM").

Road access to the Antelope Property is via paved Highway 93A to a point 6.9 kilometers northeast of Lages Junction.  From there, an all-weather gravel road proceeds south for approximately 25 kilometers to a junction with a two-track dirt road that runs east for five kilometers to the property.

Very little has been published with respect to the geology of the Antelope Range.  The primary sources of information at the property scale are the geological maps and drill hole data from previous operators.   

The geology of the Antelope Range comprises a westward-tilted block of Paleozoic carbonate and clastic rocks; older Ordovician strata are exposed on the east side of the range, whereas rocks as young as Penn-Permian are exposed on the west side. Tertiary intrusive rocks consist of northwest-striking dikes of argillically altered quartz monzonite and lesser diabase. 

Northwest-striking, down-to-the-northeast normal faults have been mapped on the basis of offsets of marker horizons, including jasperoid horizons.  A subsidiary set of northeast-striking, down-to-the-northwest faults have also been mapped, including a major fault that separates steeply dipping Upper Paleozoic strata from the gently dipping mineralized and mineralized, Lower and Middle Paleozoic rocks. 

The effects of alteration are not well documented.  Silicification with fringing de-calcification of carbonate is characteristic of the jasperoids, whereas strong clay alteration if typical of the dikes.   

Gold mineralization is widespread within the jasperoid horizons, with higher concentrations evident on dike margins and associated with northwest striking fault zones. The presence of fine grained pyrite in some jasperoid outcrops suggests that gold mineralization could be related to sulfidation of these rocks, with later oxidation removing the pyrite. 

antelope miniralization
Figure 2.  Contoured plot of grade x width for historic drill holes, illustrating northwest controls to mineralization

Antelope was the focus of surface work and drilling by Amselco (1981) and Phelps Dodge (1998, 1999), and surface work by Dumont Nickel in 2005.  Amselco drilled 3,291 meters in 32 holes, primarily with a rotary percussion rig, for an average hole depth of 100 m. The best documented and most extensive program of work was conducted by Phelps Dodge, who produced a detailed geological map of the property in addition to drilling 8,814 meters in 106 RC holes, for an average hole depth of 83 meters.  Dumont Nickel leased the property in 2005 and conducted a soil-sampling program on a grid covering 3,600 meters by 700 meters, with 90 meter sample spacing.

After acquisition of the project in 2011, Pilot Gold completed further exploration work, including compilation and digitization of historic data, spot checking of geological maps, rock-chip sampling, surveying of existing roads, ground gravity surveys, and claim staking.  

The Antelope property represents a legitimate target for discovery of a sediment-hosted, “Carlin-type” gold deposit and warrants further exploration and drilling. Over 130 shallow historic drill holes define a straightforward exploration target amenable to rapid and cost-effective exploration. 

An exploration program has been proposed which includes geologic mapping and further geophysical surveys, to be followed by a 10-hole, 2,500 meter RC drilling program. Drill hole design will respect the importance of northwest trending dikes and faults as controls on higher grade mineralization, and will seek mineralization down-dip to the west as well as in higher stratigraphic intervals.

antelope targets
Figure 3.  Schematic targets for future RC drilling

Dr. Craig Bow, Vice President Exploration of Logan, is a Qualified Person (“QP”) as defined by National Instrument 43-101.  The QP is a member in good standing of the American Institute of Professional Geologists as a Certified Professional Geologist (CPG.). Dr. Bow has reviewed and is responsible for the technical information disclosed on the website relating to the USA Gold Projects.