Hay Mountain/Tombstone Super Project
1. Potential for discovery of a high grade and large sediment and porphyry hosted copper, gold, and moly ore body of the same type as the nearby Bisbee deposit and other commercially important ore bodies throughout southeast Arizona
2. Multiple targets over copper-gold anomalies have been plotted using sophisticated ground studies including rock-chip, soil and vegetation geochemical samples assayed for 64 elements by a Certified Assay Laboratory, airborne ZTEM geophysical surveys producing magnetic and electromagnetic data and technical reports from an independent Qualified Geophysicist Geologist
3. Recent discovery of surface outcrops suggests near surface targets, significantly lowering development time and costs
4. Multiple drill targets selected for diamond core drilling
Tombstone Super Project (TSP ) hosts Liberty Star’s premiere multi target property: The Hay Mountain Project. The TSP initially consisted of 33 unpatented federal lode mining claims over a projected covered porphyry copper mineral center in Cochise County, Arizona. In 2011 and 2012 more USBLM claims and Arizona Mining Exploration Permits were added after Chief Geologist James Briscoe discovered a large multimodal anomaly over a large covered porphyry copper mineral center within the larger TSP area. Currently, the TSP, including the Hay Mountain Project, entails a 42 square mile area of interest. The company holds both federal lode mining claims (99) and Arizona Mineral Exploration Permits (5) within this larger area of interest.
Mining throughout the region began in the late 19th Century and led to the rise of legendary boom town Tombstone, Arizona. Many of these mining sites, including what is now Liberty Star’s land, reside within or adjacent to a large volcanic and intrusive geologic feature known as a caldera. These caldera structures are present throughout southern Arizona, making the region one of the richest porphyry copper areas on the planet. By 1938 exploration and development of the Tombstone Mining District in this area was stalled by altered sedimentary rock (hornfels) that was too hard for the drill technology of the day(churn drills).
Through geochemical sampling and computer modeling, Liberty Star founder and Chief Geologist & CEO James Briscoe, discovered a compelling drill target for a very large limestone hosted porphyry copper-replacement deposit. If exploration is successful, mining projected for this target would be underground, open-pit, and/or open pit for heap-leach, or in place leach (in-situ) and could produce copper, moly, gold, silver, lead, zinc and potentially other by product metals. While there are no drilled mineral resources on this property, it is adjacent to the old historic Tombstone Consolidated mines and the target is defined by technical work to allow an immediate start to drill testing. The Tombstone mining district has a well-developed infrastructure and enjoys sunny skies over 300 days a year, ideal for year round exploration and mining activities.
In mid March, 2011 Liberty Star contracted SRK Consulting to prepare technical reports over three areas within the Tombstone Super Project : Hay Mountain, Tombstone South and Walnut Creek. Members of SRK’s engineering/scientific staff supervised by Qualified Person and SRK’s Tucson Office Principle Geologist Corolla Hoag, and geologist Dr. Jan Rasmussen have visited the Tombstone property. Their information combined with the previously gathered geochemical, geophysical and computer modeling data underwent a thorough technical analysis. The resulting technical reports concluded that all three claim blocks were worthy of further exploration work.
In 2011 extensive geochemical sampling at Hay Mountain rendered approximately 1,800 soil/rock/vegetation samples which were analyzed for 64 elements at a certified analytical facility in Vancouver, British Columbia. Expected markers for porphyry copper, gold, moly, silver and zinc were present. The geochemical data also yielded the unexpected presence of four of seventeen Rare Earth Elements (REEs). Further analysis of the REE data will be undertaken at a later date.
Liberty Star contracted Geotech Ltd. to run a ZTEM airborne electromagnetic survey over the Hay Mountain area in 2013. The final draft report has been submitted to Liberty Star concluding :
1. There are as many as 10 meaningful targets within the Hay Mountain Project area.
2. Hay Mountain contains a major anomaly centered on the geochem anomaly reported by Liberty Star (NR 127).
From the “Executive Summary” Summary Interpretation Report on a Helicopter-Borne Z-Axis Tipper Electromagnetic (ZTEM) and Aeromagnetic Geophysical Survey: The Hay Mountain Project Tombstone Mining District, Cochise County, Arizona For: Liberty Star Uranium & Metals Corp.:
“The Hay Mountain Property is mainly underlain by a thick sequence of Paleozoic quartzite, limestone and siltstones, but potentially hosts buried porphyry copper deposits at structural intersections and under basin-fill formations. There is additional potential for polymetallic carbonate-hosted replacement deposits (CRD), as well as shallow chalcocite blanket porphyry type deposits and also skarn type porphyry copper deposits. Previous soil and vegetation geochemical surveys have identified a coincident Au-Pb-Cu anomaly and larger Mo-halo in the center of the property. The objective of the ZTEM surveys is to identify favourable magnetic and resistivity signatures related to potentially more deeply buried porphyry copper, CRD/skarn and chalcocite replacement deposits at Hay Mountain. The Magnetic surveys have determined that Hay Mountain hosts a large dominant magnetic high that lies buried below the Paleozoic sediments is centered over the Liberty Star geochemical anomaly and remains open to the south…As many as ten (10) magnetic anomalies have been defined.” (See NR 170, 12/11/2013)
On October 7, 2014 Liberty Star announced “New outcrops have been discovered in the main porphyry copper alteration zone target within the geochemical and geophysical zone that did not appear on any current geologic maps. Additional geologic work is ongoing to define the location and alteration of these outcrops which so far consist of silicification and brecciated (broken) silicified limestone with leached capping. Green copper oxide (chrysocolla) was identified in a very small area, but this is the first visible copper mineralization we have seen in the project surface area to date. All the copper and other metal anomalies are from trace element geochemistry and do not outcrop but are from depth where they are not visible and able to be detected except geochemically. The alteration seen recently in newly identified low outcrops is what would be expected on the edge of a skarn hosted porphyry system.” (NR 189)
By September 2015 CEO/Chief Geologist James A. Briscoe announced the placement of initial drill targets (diamond core drilling) based on recent field work conducted with an XRF analyzer and detailed mapping which found “pervasively brecciated limestone, which led to the conclusion that the area called the Chrysocolla Block (where the first discovery of oxide copper in outcrop was made) was misidentified as the Colina limestone. Further evaluation led to the conclusion that the zone was of the lower Earp formation, which is the layer directly below the Colina. A red clay marker bed at the base of the exposed Earp limestone breccia clearly identifies it, but had been inexplicably missed by previous geologists. Current understanding indicates that the latest targets may bloom into major mineral zones 200 to 400 feet in depth at their intersection with the Horquilla limestone, the major mineral host in the region.” Concluded Mr. Briscoe: “This is the specific target we have been searching for before kicking off a drill program. This development of discovery by use of the Niton and lots of boots on the ground carefully observing rocks gave us this completely unexpected outcrop; we have made the breakthrough we needed. This find is exciting and meaningful because it is the largest exposure so far located at Hay Mountain, and is similar to outcrops in the Bisbee mining district 15 miles south.”(NR 200)
Currently, Liberty Star seeks funding to conduct a one year exploratory drilling program (Phase 1) at its Hay Mountain Project.
Current area under claim: 6.5 square miles. Area of Mutual Interest: 42.5 miles.
|US BLM Claims||Number||Acres|
|TSP Total Acres||4,166|
View TSP/Hay Mtn ZTEM & Maps (web page)