Millard County, UT
Commodities: Gold, Copper, Silver, Bismuth and Manganese.
Target: Cu-Au-Mo Porphyry System and Overlying Epithermal Au.
The Drum Gold Mine West Extension Project is superimposed on mineralized intrusive dikes and highly altered calk-alkaline and shoshonitic volcanic rocks of Late Eocene age. The project offers an opportunity to potentially discover a new major ore deposit. The giant copper-gold-molybdenum deposit at Bingham, mineralization in the Drum Mountain area and the silver-lead-zinc-copper-gold orebodies at Tintic UT, along with the disseminated gold deposits at Carlin Nevada all formed during the late Eocene in connection with primitive high-K magmatism. A number of large ore deposits have been shown to have a genetic affiliation with igneous rocks of shoshonitic and high-K calc-alkaline affinities.
District mineralization and production indicates a strong sulfide rich mineralizing system that is primarily Copper-Gold-Silver with associated lead, zinc and minor molybdenum. Numerous outcrops of gold-bearing jasperoid occur adjacent to the target area.
Development to date: Geologic mapping, aeromagnetic survey, sampling and geochemistry, stable isotope studies, ASTER and Landsat 7 ETM+ spectral imaging, ground based spectral imaging, Bouguer anomaly, uranium, thorium and potassium data, historical and geological compilation.
BoreSight Mineral LLC’s Drum Gold Mine West Extension Project is located 25 miles northwest of Delta, Utah in Millard County and lies within the boundaries of the Detroit Mining District and encompass 3,104 acres
- Gold and copper were discovered in the Drum Mountains in 1872. The ores were produced from fault-controlled fissures and replacement deposits in limestone and dolomite.
- The Drum Mine, discovered by Nevada Resources and operated by Western States Minerals during the 1980’s, is 1.75 kilometers (1.09 miles) east of our Champion Reef and Raddatz-Lovering properties. The Drum Mine produced 120,000 ounces (3.73 metric tons) of gold from hydrothermally altered igneous rocks, pebble dikes, Cambrian shale and limestone. The geologic structures responsible for the gold mineralization at the Drum Mine are an eastward continuation of ore controls that originate and propagate out from BoreSight’s property.
- The major structural elements of the Drum Mountain area are the massive Thomas-Keg caldera and the westward-dipping Drum Mountain homocline. Early Cambrian sedimentary rocks of the northern Drum Mountains lay juxtaposed by the Joy Fault against the southern margin of the Caldera. The Drum Mountain homocline is made up of a thick (6,000+ feet) sequence of Early Cambrian quartzite overlain by 3,000 feet of Cambrian limestone, shale and dolomite. Volcanic sequences blanket the region filling pre-volcanic valleys, grabbens and topographic lows and attain a thickness of 2,000+ feet.
- Gold mineralization in the Drum Mountains is related to distinct shoshonitic magmatic event which occurred during the late Eocene (40-34 mya). Famous ore deposits and mineral districts associated with this time-space tectono-magmatic even are the world-class mining districts of Bingham, Park City and Tintic, Utah, Carlin and Battle Mountain, Nevada.
- A stable isotope study was conducted on the gold-bearing jasperoid which shows the economic implications relative to the probable occurrence of additional large quantities at depth. The relative depletion of deuterium and oxygen in the quartz and carbonates indicate the participation of large quantities of ground water with hydrothermal fluids in the formation of these gold jasperoid bodies. Near zero delta values of carbon imply a sedimentary source but allow for a minor component of magmatic carbon whereas near zero delta values for sulfur strongly suggest the pyrite is from a magmatic source. Fluid inclusion studies establish a hypogene origin for the jasperoid and the probable occurrence of large quantities of gold-bearing jasperoid at depth.1
- Three styles of gold mineralization have been identified on the Drum Mountain gold project. The three styles include; gold-bearing jasperoid, sulfide replacement and vein. The gold mineralization is likely linked to the shallowly emplaced Mount Laird group of high-K intrusive rocks. The epizonal type of gold occurrence was not recognized by the mining industry until the early 1980’s when it was discovered and exploited at the Drum Mine in the 1990’s.
- On the BoreSight Minerals property, volcanic hosted argillic and quartz-sericite alteration is associated with a strong negative aeromagnetic response. This geophysical element correlates well with intense magnetite-destructive hydrothermal alteration. When combined with stable isotope values, a genetic link to porphyry style gold-copper-molybdinum mineralization begins to emerge and is suggested at depth. Other supporting clues include; Au-Cu association, distinct ore mineral zonation and alteration assemblages expected with the entrainment of a magmatic hydrothermal contribution to a ground water dominated hydrothermal system. Epithermal gold deposits related to porphyry style mineralization are among the world’s major repositories of Cu, Au, and they remain one of the most sought after targets for the global mineral exploration and mining industry.
- Seven large gold-bearing jasperoid masses crop out on our Champion Reef claims. An underground study was conducted by BoreSight Minerals in an adit on Champion Reef Claim #10 which revealed that only 20% of the gold-bearing jasperoid at this site is exposed on the surface with the balance of gold-bearing jasperoid remaining hidden below a capping of alteration clays and dolomitized limestone. Jasperoid surface exposures range in size from 575 X 120 feet to 314 X 226 feet and zones of outcrops measure in much larger dimensions. This occurrence of jasperoid is likely the result of upward leakage along a north-west fault system from deeper mineralization.
- From 1962 to 1969, the USGS conducted a geochemical survey of the gold-bearing jasperoid in the Drum Mountains. The survey found gold values ranging from 0.005 to 2.94 ounces of gold per ton in the jasperoid studied. The total average gold value from all the areas surveyed was 0.080 ounces per ton (2.6 grams per ton). The USGS stated in their report that at the 1969 price of gold ($35 per ounce) the size and tenor of several of the jasperoid masses could constitute an economically viable ore.2
The gold content within the jasperoid appears to increase with depth. BoreSight Minerals LLC’s surface rock chip sample values range from 0.005 to 0.052 ounces of gold per ton. Samples taken 15 feet below the surface range from 0.132 to 0.223 ounces of gold per ton with little variance. The physical appearance of the rock has little bearing on the gold values as the gold is microscopic and is not visible to the naked eye.
Castle Mountain Project
Tooele County, Utah
Commodities: Gold, silver, copper, lead and zinc.
Development to date: Geologic mapping in progress, reconnaissance assays, historical and geological compilation, ASTER and Landsat 7ETM+ spectral imaging, isotactic anomaly, bouguer anomaly, uranium, thorium and potassium data.
BoreSight Minerals LLC’s Castle Mountain property is located 20 miles north of the Drum Mountains in Tooele County.
The Castle Mountain property is a “green field” prospect located 40 kilometers (20 miles) north of the Drum Mountains in Tooele County, Utah. The property was discovered by Matthew Ure in July 2011 and represented by an erosional window into an un-prospected Carbonate-base metal-Au, Ag deposit which is likely telescoped onto deeper polymetallic and porphyry mineralization. Gossans, veins and “float” ore occur along NE and NW trending faults and share a spatial relationship to advanced argillic alteration, dolitimization and intense silicification. Numerous altered and structurally controlled porphyritic dikes of intermediate and basaltic chemistry intrude NE and N-S faults and converge near a large breccia diatreme indicating repeated intrusion and a potential porphyry type deposit at depth.
 O’Neil, J. R. and Bailey, G. B., July 1979, Stable Isotope Investigation of Gold-Bearing Jasperoid in the Central Drum Mountains, Utah, Society of Economic Geologists, American Geological Institute Abstract.
2] McCarthy, Jr., J. H., R. E. Learned, J. M. Botbol, T. G. Lovering, J. R. Waterson, and R. L. Turner, 1969, Gold-Bearing Jasperoid in the Drum Mountains Juab and Millard Counties, Utah, U. S. Geological Survey, Geological Survey Circular 623.