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Trilogy Metals shares final drill results from Bornite project

Published by , Assistant Editor
Global Mining Review,

Trilogy Metals Inc. (Trilogy Metals) has reported the third, and final, set of copper and cobalt assay results for five holes from the 2018 summer exploration diamond drilling programme at the Bornite project, a part of the company's Upper Kobuk Mineral Projects (UKMP) located in the Ambler Mining District of Northwest Alaska.  Assay results from these five holes comprise approximately 3024 m from the 10 123 m drill campaign. All five of the drill holes contain significant copper mineralisation and were designed as infill and extension holes to the 300 - 400 m step-out holes drilled by the company's previous round of drilling completed in 2017.

On 23 August 2018, the company announced initial assay results from the first drill hole, RC18-0247, from the Bornite project. Subsequently, on 9 October 2018, the company announced additional assay results for three additional drill holes (RC18-0243, RC18-0244, RC18-0246 as well as RC18-0247). Additional drilling results, comprising assay results from three drill holes (RC18-0248, RC18-0249 and RC18-0250) were released on 19 November 2018. The current release contains the results for the five remaining drill holes (RC18-0251, RC18-0252, RC18-0254, RC18-0255 and RC18-0256). Hole RC18-0253 was re-collared as RC18-0254 before reaching its target depth. In total, 12 holes were drilled at the Bornite project during the 2019 summer exploration programme.  

Rick Van Nieuwenhuyse, President and CEO of Trilogy Metals commented: "The latest drilling results confirm the extent and continuity of the copper and cobalt mineralised system at the Bornite project, and continue to demonstrate that the system is open.

The results from drill hole RC18-0254 show additional thick zones of continuous copper-cobalt mineralisation which is what was seen in RC13-0224, which contains 236.0 m of 1.90% copper, including 6.6 m of 7.70% copper (please see the press release dated 7 October 2013). Hole RC18-0254 is approximately 150 meters to the southwest of RC13-0224. Within the central part of the Bornite deposit, drill holes RC18-0252, RC18-0255 and RC18-0256 partially in-fill the doughnut hole – [...]an area previously undrilled. These three drill holes extend the mineralised envelope towards the surface - potentially expanding the opencast resource. The results from RC18-0251 extend the South Reef Zone up-dip to the south – albeit at lower grades but the mineralised system remains open up-dip towards the surface.  Overall, all four of these holes (RC18-0251, RC18-0252, RC18-0255 and RC18-0256) show that the South Reef mineralisation is open up dip and joins with the Main Lower Reef mineralisation that makes up the opencast resource."

This year's programme was comprised of 12 drill holes totalling approximately 10 123 m through a combination of infill and expansion drill holes in and around the known deposit. The original drilling campaign was budgeted to be 8000 m but was subsequently expanded to 10 000 m with the addition of two more drill rigs. The 2018 programme followed up on drilling completed during the 2017 exploration programme, which was one of the larger programmes in the history of drilling at the Bornite project. During 2017, the company drilled nine diamond drill holes comprising 8437 m to test the extension of the of the currently defined resource.

The objective of the 2018 drill campaign was to infill and expand the currently defined opencast and underground mineral resources.

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