The Storm copper project is growing at breathtaking speed in all directions
Australian copper explorer American West Metals (ASX: AW1; FRA: R84) is finding increasing evidence that an extensive deep copper system extends beneath the known near-surface copper resources at the Storm Project on Somerset Island in Nunavut, which also acts as a source of near-surface mineralization. In two diamond drill holes this season, the company has again intersected wide intervals of visible copper at the expected target depth of approximately 300 meters. Holes ST24-01 and ST24-02 have each intersected 21.3m and 99.2m of visible copper sulphides, respectively, within what is interpreted to be the equivalent of the same mineralized stratigraphic horizon as the previous deep drilling.
Together with last year’s deep drilling, there are now a total of seven intersections in this deep copper horizon spread over an area of approximately 10 km², with all seven holes having hit. The 100% success rate of the deep drillings to date indicates, from the geologists’ point of view, that this could be a continuous horizon. To find sweet spots of deep mineralization, American West is conducting particularly deep geophysical surveys in the form of electromagnetic moving loop surveys (MLEM). Recent analysis shows a 1,300m x 500m anomaly at depth below the Cirrus deposit and The Gap prospect. A further deep well is currently being drilled there as a high priority.
Dave O’Neill, Managing Director of American West Metals, commented: “The visual results from the first two deep diamond drill holes of this season show that both holes have encountered thick zones of copper mineralization. Combined with previous years’ drilling, seven of seven deep holes have intersected the prospective target horizon at depth, with copper encountered in all holes. Every fault, every void, every gap in the rock that we have encountered within the deep horizon contains copper. The size of the target horizon is already very impressive as these drill holes cover an area of over 10 square kilometers. The success rate and volume of copper mineralization tells us that this is a potentially huge and long-lived mineral system. The focus of deep exploration going forward will be to explore the strongest parts of the mineralization. The size and strength of some of the new anomalies make them compelling targets that will now be drill tested.”
Summary: The Storm copper project has a shallow and a deep component. While the shallow copper deposits - as recently reported - could be suitable for DSO starter production and open pit mining, the deep mineralization is on a completely different scale. Recent deep drilling successes highlight the potential of Storm to host large-scale stratigraphic and structural high-grade copper deposits. American West geologists are now drawing comparisons to sediment-hosted copper deposits in the Central African copper belts, which are among the largest in the world. Based on new geophysical data the ongoing third drill hole is designed to test a potential sweet spot of this mineralization and is therefore of high priority. The MLEM geophysical surveys at various depths have proven to be highly efficient on the Storm project. In the current season alone, American West has defined more than 10 new high priority near-surface targets that are currently being tested with reverse circulation (RC) drilling. In addition, there are five deep EM anomalies at favorable locations within the large trench fault network. Deep MLEM survey technology is also already being deployed in the Tornado and Blizzard areas, located approximately 10 km along strike to the east of Storm. At the same time, the Fly RC rig is drilling on the Tempest prospect 40 km to the south. In short, the Storm copper project is growing at breathtaking speed in all directions. American West is not running out of targets any time soon.
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