Colosseum Gold Mine

Colosseum Rare Metals

The Colosseum Gold Mine (Colosseum) is located at the southern section of the Walker Lane Trend in East San Bernardino County, California, USA. The Walker Lane Trend hosts numerous substantial discoveries, including the 1.7 million ounce Mother Lode Deposit and the 6.5 million ounce Castle Mountain gold mine.

Dateline acquired the Colosseum Gold Mine from Barrick Gold Corporation in March 2021.

Colosseum Mine Map
Colosseum Drilling

Cross section showing the existing pit, mineral resource blocks and new drill intercept.

JORC Compliant Mineral Resource

An 813,000-ounce resource has been confirmed at the Colosseum of 71% is in the measured and indicated category.

Cut-off Grade g/t AuTonnesGrade g/t AuContained Ounces%
  • Mineral Resource estimated at 0.48g/t Au cut-off
  • Numbers may not add up due to rounding. Differences occur when converting from Imperial to Metric units are less than 1%

Drill Hole Highlights

63.2m @ 10.28g/t Au intercepted in drill hole CM23-08, including:

  • 23.5m @ 21.8g/t Au

 100.6m @ 4.16g/t Au in hole CM22-05, including:

  •   19.81 metres of 5.19g/t Au
  •   3.05 metres of 13.78g/t Au
  •   16.8 metres of 6.76 g/t Au
  •   7.6 metres of 12.74 g/t Au
  •    4.6 metres of 7.10g/t Au

10.67m @ 13.71g/t Au in hole CM22-04, including:

  •   3.05 metres of 42.88g/t Au
  •   1.52m of 2.70g/t Au

Dateline has reconstructed the historical drill hole database that consisted of 599 holes for 55,609 metres of drilling.

The drill hole database includes two diamond drill holes (DDH-1 and DDH-2), drilled in 1972 by Draco Mines, with both drilled to ~3,000 feet (~1,000m). Both drill holes targeted a porphyry molybdenum deposit thought to lie beneath the pipes and not gold. Draco Mines intersected the high-grade sedimentary breccia units at almost 3,000ft below the surface

The Company believes there is potential for the two breccia pipes to join up at depth and yield a significantly greater resource.

Breccia pipes