Millard County, UT
Commodities: Gold, Copper, Silver, Bismuth and Manganese.
Target: Cu-Au-Mo Porphyry System and Overlying Epithermal Au-Ag.
The Drum Gold Mine West Extension Project is superimposed on mineralized dikes that intrude a series coeval shoshonitic and calc-alkaline volcanic rocks of Late Eocene age. The project offers the opportunity to potentially discover a world class ore deposit.
Like the giant copper-gold-molybdenum deposit at Bingham Canyon, gold-copper mineralization in the Drum Mountain area, the silver-lead-zinc-copper-gold orebodies at Tintic and Park City and the disseminated gold deposits at Carlin Nevada, all formed within in a very narrow window of time in connection with a distinct pulse of late Eocene high-K magmatism brought on by the end of subduction of the Farallon Plate. In these districts, the acent of metal rich magma was controlled by trans-crustal structures originating at ancient zones of weakness near the crust mantle boundary. BoreSight Minerals interprets The Drum Mine Structural Corridor as a surface manifestation of a fundamental zone of deep crustal weakness. The majority of world class ore deposits have been shown to have a genetic affiliation with igneous rocks of shoshonitic and high-K affinities formed at the end of subduction cycles above favorable basement architecture.
District mineralization and geochemical observation indicate a strong sulfide mineralizing system that is primarily copper-gold-silver with associated lead, zinc and molybdenum. Numerous outcrops of gold and silver bearing jasperoid occur within and along margin of 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 project area. 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 northeast from the West Extension Project.
- The major structural elements of the Drum Mountain area are the northwest trending Drum Mine Structural Corridor, the Thomas-Keg caldera north of the project area and the westward-dipping Drum Mountain homocline. Neoproterozoic and Early Cambrian sedimentary rocks of the northern Drum Mountains are juxtaposed against the southern margin of the Thomas Caldera. The Drum Mountain homocline is made up of a thick (6,000+ feet) sequence of Noeproterozioc through Early Cambrian quartzite overlain by 3,000 feet of Cambrian limestone, shale and dolomite. Volcanic sequences blanket the region and fill pre-volcanic valleys, grabbens and topographic lows and attain a thickness of 2,000+ feet.
- Gold mineralization in the Drum Mountains is related to a distinct high-K and calc-alkaline magmatic mixing event which occurred during the late Eocene (40-34 mya). Famous ore deposits and mineral districts associated with this tectono-magmatic event 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 its genetic and 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 magmatic-hydrothermal fluids in the formation of these gold jasperoid bodies. Near 0‰delta values for carbon imply a sedimentary source but allow for a minor component of magmatic carbon whereas near 0‰delta values for sulfur strongly suggest the pyrite is from a magmatic source. Fluid inclusion studies establish a hypogene origin for the jasperoid with formation temperatures 125º – 255º C and the probable occurrence of large quantities of gold-bearing jasperoid at depth.1
- Three styles of gold mineralization have been identified at the Drum Gold Mine West Extension Project. These include; gold-bearing jasperoid, sulfide replacement and quartz vein. Gold mineralization is likely linked to a shallowly emplaced group of high-K intrusive rocks. Epizonal gold mineralization 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 and within the Drum Mine Structural Corridor, volcanic hosted argillic and quartz-sericite alteration is associated with a strong negative aeromagnetic response. This geophysical element correlates with intense magnetite-destructive hydrothermal alteration and when combined with other observations such as ore mineral zonation patterns, geochemical anomalies and stable isotope values, a genetic link to porphyry style gold-copper system emerges and is strongly indicated at depth. Other supporting evidence include; Au-Cu association, 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.