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Technical Study

Great Atlantic Reports Metallurgical Scoping Tests Indicating up to 99% Gold Recovery for the Jaclyn Main Zone at Its 100% Owned Golden Promise Gold Property - Central Newfoundland

By The Northwire Desk — AI Analysis Oct 27, 2025 · 09:01 GR · 0.115 Great Atlantic Resources Corp.
GR · Price

Executive Summary

  • Great Atlantic Resources received two 2010 SGS metallurgical reports for the Golden Promise Gold Property, confirming high‑grade gold recoveries through gravity separation and leaching.
  • Head grades of 4.5 g/t (Phase 1) and ~8 g/t (Phase 2 composites) were reported, with combined recovery rates up to 99 % in laboratory tests.
  • The company recommends moving the project into a flowsheet development phase and continues bulk‑sampling work with partner Novamera Inc.

Key Details

  • Phase 1 (Project CAVM‑20073‑001) – 34.4 kg sample; head grade 4.5 g/t Au.
  • Gravity separation on 10 kg (K80 120 µm) recovered 85 % Au.
  • Gravity tail ground to K80 70 µm and leached → 93.6 % recovery; combined gravity/leach recovery ≈ 99 %.
  • Floatation test on gravity tail (K80 110 µm) recovered 95.7 % Au to a 6.4 % mass concentrate; combined gravity/float recovery ≈ 99.4 %; leaching flotation tail recovered 65.6 % Au (deemed unnecessary).

  • Whole‑sample leach (1 kg, K80 70 µm) recovered 98.2 % Au.

  • Phase 2 (Project CAVM‑50073‑002) – Two drill‑core composites: A (17.0 kg) and B (13.9 kg).

  • Head grades: Composite A 8.00 g/t Au; Composite B 8.02 g/t Au.
  • Gravity separation on Composite A (K80 150 µm) recovered 84 % Au.
  • Gravity tail ground to P80 100 µm and leached → 77 % recovery; combined gravity/leach ≈ 96 %.
  • Whole‑sample leach of Composite A (P80 150 µm) recovered 93 % Au, consuming 0.16 g/t NaCN.

  • Whole‑sample leach of Composite B (P80 100 µm) recovered 93 % Au, consuming 0.25 g/t NaCN.

  • Recommendations – Advance to flowsheet development including mineralogical, comminution, solid/fluid separation, and environmental studies; extend gravity‑recoverable gold determinations; continue optimization of gravity, leach, and flotation parameters.

  • Resource Context – Inferred 2018 NI 43‑101 resource for Jaclyn Main Zone: 357,500 t @ 10.4 g/t Au (≈119,900 oz Au, uncapped).

  • Ongoing Work – Bulk sampling program (~2,700 t) at Jaclyn Main Zone with Novamera Inc., employing precision mining and Surgical Mining™ technologies for further metallurgical testing (referenced in Sep‑15‑2025 & Oct‑14‑2025 releases).

  • Qualified Person – David Martin, P.Geo., VP Exploration, compiled the technical information; not a metallurgist.

Notable Quotes

“The laboratory results demonstrate that gravity separation and leaching can achieve near‑complete gold recovery from our Golden Promise material, supporting progression to detailed flowsheet development.” – Christopher R. Anderson, President & CEO.

Read the original news release →

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