The South Roberts project targets a large Carlin-type gold deposit under thin alluvial cover. The target is defined by a 3.5 mile (5.6 km) north-northwest alignment of gold plus Carlin-suite pathfinder anomalies in soils that is strongly coincident with structures and structural intersections interpreted from our detailed gravity survey. Coupled with the shallow depth to bedrock and favorable host rocks, our data defines a compelling, large undrilled target, with geologic potential for a world class discovery. The geologic and structural setting of this target is very similar to the large Goldrush and Cortez Hills deposits on trend to the northwest, where age-equivalent Devonian carbonate host rocks in the lower plate of the Roberts Mountains Thrust occur along a major north-northwest regional fault zone indicated by a large gravity gradient.
Carlin-type districts generally comprise one or more multi-million ounce gold deposits and a cluster of smaller satellite deposits. Just north and east of the South Roberts property, several small Carlin-type deposits have been found in the Roberts Mountains, several of which have been mined. A major gold deposit, however, has so far eluded discovery, and Kinetic Gold believes that the South Roberts property is highly prospective for a major Carlin-type gold deposit hidden beneath shallow to moderate thicknesses of gravel in Kobeh Valley, south of the Roberts Mountains in the southern Battle Mountain-Eureka trend.
Location and Claims
The South Roberts project comprises 186 unpatented lode claims (3720 acres) located along the Battle Mountain-Eureka Gold Belt in southern Eureka County, Nevada. Kinetic Gold controls a 100% interest in all claims. Sixty-eight claims in the northern part of the project are subject to an underlying lease agreement and royalty and the remainder of claims are 100% owned by Kinetic Gold.
The South Roberts property is entirely underlain by thin Quaternary alluvium and possibly intercalated Miocene volcanic rocks related to the adjacent Northern Nevada Rift, which borders the eastern margin of the property. In the uplands to the north, the Roberts Mountains window exposes Silurian to Devonian platform margin and slope facies carbonates, lying in the footwall of the Roberts Mountains Thrust. The western boundary of the Roberts Mountains window is defined by the Wall Fault, a major northwest structure that separates deep water Ordovician siliciclastic rocks of the upper plate of the Roberts Mountains Thrust to the west from Silurian to Mississippian carbonate rocks of the lower plate to the east. Another major fault system, the north-northwest trending Roberts Creek Fault Zone, is an important control on mineralization in the Roberts Mountains to the north. These rocks and structures project south into the South Roberts property, where they intersect beneath alluvial cover.
In 2012, Kinetic Gold conducted a 200 m by 200 m gravity survey over much of the claim block. Results of this survey indicate that a north-northwest trending carbonate ridge, which is exposed to the north, continues throughout most or all of the South Roberts claim block beneath shallow alluvial cover. The northern part of the claim block lies along the west flank of the carbonate ridge and the southern claims covers both flanks and the crest. Several major structures have been interpreted from the gravity data, including extensions of the Wall fault and the north-northwest trending Roberts Creek fault, which projects south from the Roberts Mountains and is represented by a major gravity break on the west edge of the carbonate ridge. Intersections of these and other major faults occur within the South Roberts property.
A 400 m by 400 m soil survey utilizing the enzyme leach analytical method has been completed on the property. The results have defined gold and Carlin-suite pathfinder element anomalies that coincide with, or abut major faults interpreted from the gravity data. A north-northwest trend of gold and pathfinder element highs extends along the west flank of the buried carbonate ridge for approximately 3.5 miles (5.6 km). A west-northwest gold and pathfinder element trend intersects the north-northwest geochemical response, marking an important target area. The west-northwest geochemical response projects from the South Roberts property to thin gold-bearing jasperoid to the west, and ultimately, to the Gold Bar mine. This trend is parallel to the Gold Pick/Gold Ridge trend of gold deposits to the north in the Roberts Mountains.
Nearby Gold Deposits
The Roberts Mountains contain at least eight Carlin-type gold deposits hosted in Devonian carbonates, and to a lesser extent in Mississippian clastic rocks. They range in size from 15,000 oz gold (Hunter) to 866,000 oz gold (Gold Pick/Gold Ridge). Total recorded production by Atlas Precious Metals is about 588,000 oz gold, of which 322,000 oz gold came from the Gold Bar mine. McEwen Mining has announced that it intends to resume production in 2015 at its Gold Bar project which includes the Gold Pick/Gold Ridge and Cabin Creek deposits, and now reports a total resource (inferred + indicated + measured) of 805,096 oz gold. NV Gold reports that the Afgan-Kobeh deposit contains resources (inferred + indicated) of 121,000 oz Au.
Maps and Figures
Residual gravity, structural interpretation and gold in soils by enzyme leachclick on image to enlarge
Geologic cross-section showing target model for mineralization at South Robertsclick on image to enlarge