American West (ASX:AW1) confirm copper discovery at Storm
September 26, 2023American West Metals have delivered a 76m @ 2% Cu from 32m strike at the Thunder Prospect and confirmed discovery of a large sediment-hosted copper system within its Storm Copper Project in Canada.
All three assayed diamond holes intersected sediment-hosted copper beneath the project’s near-surface copper deposits, with a 24-metre-thick interval of copper sulphides at depth with values up to 2.7 per cent indicating potential of the deeper system to host high-grade mineralisation.
The results confirmed a correlation between copper and gravity anomalies, and American West Managing Director Dave O’Neill said that they carried significant implications for the project’s exploration potential.
“We have demonstrated that the mineralised copper horizon is associated with a series of gravity anomalies that sit below or adjacent to the known near-surface high-grade copper prospects and
major faults,” Mr O’Neill said.
“These gravity features occur along the entire length of the Storm–Tornado graben, supporting the potential for a very large sediment-hosted copper system, similar to the large-scale copper deposits in the Congo and Botswana.”
Mr O’Neill added that all the wide-spaced nature of the holes indicated a very large lateral extent, and with kilometre-scale targets remaining untested, the company will plan a major drill program for next year to scope out the extent of sediment-hosted copper.
“The near-surface Thunder Prospect has been confirmed as an exceptional discovery with grades up to 49.6% Cu. These kinds of copper grades and thicknesses are remarkable and rarely seen in open-pit mining opportunities, further highlighting the resource potential of the near-surface mineralisation,” he said.
“One of the key takeaways from these drilling results is that – in addition to the significant volume of
mineralisation already identified – there are still tremendous exploration opportunities at Storm. The
full extent of the copper mineralisation at Storm has yet to be defined and we are excited to be planning follow-up exploration and drilling programs.”
Diamond drill hole ST23-03 results
- 76m @ 2% Cu from 32.4m
- Including 48.6m @ 3% Cu from 32.4m,
- And including 20m @ 6.2% Cu from 40.8m
Forward plan
American West is continuing resource modelling and estimation across the greater Storm project, with more assays from the 2023 drill program anticipated over the coming few weeks.
Assays for rock and gossan samples from the Tempest area are also pending, and the company now has five significant, fault-related and widely spaced copper prospects to explore which remain untested beyond 100 metres deep.
Logistics and exploration planning for next year’s program are underway, and the company is also compiling a report on the Storm project for a summer environmental program.
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