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Trilogy Metals announces initial Arctic Project drill results

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Global Mining Review,

Trilogy Metals Inc. has announced the first drilling results from the 2021 summer field season at the Arctic Project, part of the Upper Kobuk Mineral Projects (UKMP) located in Northwestern Alaska managed by Ambler Metals LLC, the joint venture operating company equally owned by Trilogy and South32 Ltd.

The 2021 Arctic field programme included 4131 m of diamond drilling, comprising 18 holes, that were designed to convert a portion of the resources from the indicated category to the measured category, and provide material for metallurgical testing and geotechnical information. The results contained in this news release are from the first two geotechnical holes of the programme that were drilled at the start of the field season. The results of the remaining 16 holes are expected to come in over the next couple of months.


Drill holes AR21-0173 and AR21-0175 were drilled as part of the 2021 geotechnical programme that is designed to test the northeast pit’s wall stability. Both holes show that high grade mineralisation extends beyond the currently defined pit at Arctic.

Based on a cut-off grade of 0.5% copper equivalent, significant zones of high-grade copper, zinc, lead, gold, and silver mineralisation were intersected, including:

  • AR21-0175 intersected three mineralised intervals, including 24.94 m of 1.85% copper (Cu), 2.96% zinc (Zn), 0.57% lead (Pb), 0.28 g/t gold (Au) and 27.09 g/t silver (Ag) for a copper equivalent grade of 3.55%. Within this interval is a subinterval of 5.62 m grading 4.94% copper, 10.57% zinc, 1.71% lead, 0.4 g/t gold and 58.9 g/t silver for a copper equivalent grade of 10.17%.
  • AR21-0173 intersected one mineralised interval of 3.77 m of 2.15% Cu, 0.87% Zn, 0.34% Pb, 0.83 g/t Au and 82.89 g/t Ag for a copper equivalent grade of 3.85%.

The composites are based on a copper-equivalent grade of 0.5% using metal prices from Trilogy’s 2020 Arctic feasibility study (US$3.00/lb Cu, US$1.10/lb Zn, US$1.00/lb Pb, US$1300/oz Au, and US$18.00/oz Ag) and a maximum of 3-m internal dilution. All drill hole intercepts are close to true width.

Tony Giardini, President and CEO of Trilogy, commented: “The initial drilling results from Arctic continue to confirm our belief that the Arctic deposit is one of the highest grade polymetallic mineral projects in the world. Not only is Arctic high grade, but it also has wide zones of mineralisation that are relatively close to surface. Of note is drill hole AR21-0175 which appears to extend high-grade mineralisation beyond the current pit at Arctic. The latest drilling programme at Arctic will assist Ambler Metals in the continued de-risking of the project and in the detailed engineering of the asset.”

Richard Gosse, Vice President, Exploration at Trilogy, added: “It is good to see the results of our 2021 drill programme are beginning to come in from ALS Laboratories. Also, good to see these high-grade extensions, just outside the proposed pit and relatively close to surface, in holes that were primarily designed to collect geotechnical information. We are looking forward to seeing the results of the remaining 16 drill holes at Arctic as well as from the regional drill programme.”

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