Lower plate carbonate rich sediments are exposed below the Roberts Mountain Thrust within an area called the Cortez window. These lower plate sediments host over 90% of the gold found within the Carlin and Battle Mountain- Eureka trends. In the Toiyabe project area gold mineralization is hosted within a similar geologic setting. The stratigraphy, structure and alteration are analogous to that found at nearby Cortez, Cortez Hills, Pediment, Horse Canyon and Pipeline deposits.
Restricted areas of close-spaced drilling of the near surface (less than 400 ft) have been conducted on the property starting in 1979 and extending to the present. Available records suggest that approximately 243 holes have been completed on the subject property, of which 159 have detailed records and assays available. This drilling indicates potential for additional gold mineralization at relatively shallow depths.
Toiyabe contains at least two strongly mineralized fault zones with strong gold values on surface and in drilling. This evidence demonstrates the potential for gold-mineralizing fluids to travel from a deeper source through reactive, lower plate, carbonate rocks to the shallow mineralization encountered to date at Toiyabe. Several deeper drill holes have encountered low to moderate gold mineralization erratically distributed through comparable stratigraphy in nearby producing mines. Although the necessary structural complexities and traps required to host a large economic gold occurrence have yet to be encountered, a recent re-interpretation of stratigraphy and structure by Paul D. Noland indicates that this environment likely exists within the Toiyabe project boundary and may be responsible for at least some of the mineralization encountered within less favorable, upper plate lithologies.
Previous Work and Drilling 2009
Since 2006, Golden Oasis (later ACM) has conducted an intensive program of geologic mapping, geophysical surveys, compilation and drilling. This work has increased the knowledge of the mineralized system, identified a drill defined resource, and helped define at least five viable targets for further exploration. ACM had anticipated continuing exploration of the Courtney target. To date ACM's work has identified the favorable stratigraphy and potential feeder faults sufficiently that deeper drilling of Pipeline style targets is recommended. A single 1,500 feet long angle core hole is recommended in order to test favorable host rocks adjacent to one of the more favorable north-northwest feeder faults.