Exploration Potential

Significant Exploration Potential

Goldrich has uncovered a widespread system of gold mineralization and more than 30 high-priority drill prospects across six square miles to date. Exploration has included airborne radiometric and magnometer surveys, geologic mapping, surface trenching, geochemical sampling and diamond/reverse-circulation drilling.

To date 25 HQ-sized diamond drill holes and 39 reverse-circulation holes have been completed, totaling 22,100 feet (6,700 meters), testing six prospect areas along a four kilometer northeast trending belt. All prospects are associated with major shear zones and/or subsidiary faults. Details of the highest priority drill targets are described below:

Aurora Gulch Prospect

  • Large soil gold-arsenic anomaly spanning ~1,200 feet (365 meters) across; underlain by carbonaceous gray to black schist
  • Greenstone sills up to 75 feet (22 meters) thick exposed near the top of ridge
  • Anomalous gold values have been found in soil, stream sediment and rock chip samples
  • Mineralization occurs as pods and lenses of sulfide┬▒quartz distributed within sheared and isoclinally folded black phyllite/ schist
Target DDH From (ft) To (ft) Interval (ft) Interval (m) Au (g/t)
Aurora LS-0062 49.0 52.0 3.0 0.9 5.32
    350.0 355.0 5.0 1.5 4.39
    475.0 480.0 5.0 1.5 6.57
  LS-0063 56.0 59.0 3.0 0.9 4.44

Goldrich Mining Chandalar Gold District Prospects Aurora
Above: Stockwork veinlet mineralization at Aurora prospect

Rock Glacier Showings

  • Comprises several lobes derived from individual areas of intense mechanical weathering
  • Quartz vein and altered vein breccia are found over an area covering 150 feet wide by 800 feet long (45 x 244 meters)
  • Weathered float cobbles of dark quartz stained by As- and Fe-oxides contained massive arsenopyrite and other sulfides
Target DDH From (ft) To (ft) Interval (ft) Interval (m) Au (g/t)
Rock Glacier LS-0041 249.0 263.0 14.0 4.3 3.29
      including 7.0 2.1 6.02
    449.0 486.0 37.0 11.3 1.08
  LS-0060 475.0 480.0 5.0 1.5 4.17

Goldrich Mining Chandalar Gold District Prospects Rock Glacier
Above: Southwest lobe of Rock Glacier (foreground) mantled with quartz vein float

Mikado Shear Zone

  • Zone can be traced for six kilometers and represents the most developed gold prospect in the district
  • Shearing, faulting and silica-sulfide (gold) emplacement veins occur over total widths ranging from 82 to 213 feet (25 to 65 meters)
  • Characteristics compare favorably to other lode districts containing large, bulk mineable gold deposits
Target DDH From (ft) To (ft) Interval (ft) Interval (m) Au (g/t)
Mikado LS-0049 256.0 259.0 3.0 0.9 4.58
    378.0 381.0 3.0 0.9 4.46
  LS-0051 173.0 176.0 3.0 0.9 10.25

Goldrich Mining Chandalar Gold District Prospects Mikado
Above: Exposure of the Mikado structure on St. Mary's Creek at an elevation of 3,600 feet

Crystal Prospect

  • Prospect consists of four parallel quartz veins
  • Historic reports describe prospect shaft and grab sample of banded ribbon quartz veins assaying 43.2 ounces (1,344 grams) per tonne gold
  • Additional samples of massive white quartz reportedly contained up to 0.99 ounces (31 grams) per tonne gold

Goldrich Mining Chandalar Gold District Prospects Crystal
Above: 5 foot (1.5 meters) massive quartz vein

Ratchet Ridge/Summit Prospect

  • Located on ridge divide between Little Squaw Creek and Big Creek
  • Adit has been driven on a poorly exposed 2.5-foot quartz vein and a nearby shaft is present
Target DDH From (ft) To (ft) Interval (ft) Interval (m) Au (g/t)
Summit LS-0044 79.0 128.0 49.0 14.9 1.12
      including 28.0 8.5 1.70
  SUM-7 45.0 140.0 95.0 28.9 0.85
      including 20.0 6.1 2.63
   SUM-8 95.0 140.0 45.0 13.7 0.42
  SUM-9 80.0 95.0 15.0 4.6 2.28
      including 5.0 1.5 5.52
  SUM-12 205.0 300.0 95.0 29.0 0.28

Goldrich Mining Chandalar Gold District Prospects Ratchet Ridge/Summit
Above: Outcrop in cirque headwall of eastern extension of Ratchet Ridge gold-arsenic occurrence

Indicate/Tonopah Vein Fault

  • Early-century mining of Indicate-Tonopah vein occurred across approximately 350 feet (160 meters) across of valley bottom
  • Re-sampling of trenches in 1982 yielded 1.7 ounces (52.9 grams) and 6 ounces (186.2 grams) per tonne gold in grab samples

Goldrich Mining Chandalar Gold District Prospects Indicate/Tonopah
Above: Remains of Indicate-Tonopah mill

Pioneer Shear Zone

  • Zone traceable across six miles; mineralization occurs in lenses of pulverized quartz, sericite and white clay
  • Field reconnaissance collected three float samples collectively averaging 1.45 ounces (45 grams) per tonne gold
  • Two trenches near the ridge crest have exposed shear zones and sheeted quartz veins up to 3 feet (0.9 meters) wide

Goldrich Mining Chandalar Gold District Prospects Pioneer
Above: Prospect trench shows pinching and swelling pulverized auriferous quartz lenses part of a 25 foot (7.6 meters) wide zone

McLellan Prospect

  • Prospect believed to be offset of Crystal prospect veins
  • Five massive white quartz veins have been mapped running north-south over 600 feet (183 meters) measuring up to 20 feet (6.1 meters) in width
  • Soil samples have assayed approximately 1.1 ounces (34.3 grams) per tonne gold

Goldrich Mining Chandalar Gold District Prospects McLellan
Above: Massive quartz veining is exposed in a trench at the McLellan prospect

Get Email Updates