American Rare Earths Ltd (ASX:ARR) has defined a significant rare earth deposit spanning over 10 square kilometres and to depths of 150 metres from its 38-hole drill program at the Halleck Creek Rare Earths project in Wyoming, USA, with the potential to be the largest REE deposit in North America.
The drill program demonstrated consistent rare earth (REE) grades throughout both the Overton Mountain and Red Mountain areas within the project.
The new assays also confirm REE mineralisation extending from the surface to new depths at the Overton Mountain area.
Importantly, the drilled area at Halleck Creek is only 25% of the total area sampled to date at the project.
Looking ahead, ARR is on track towards releasing its maiden JORC resource at the end of this month.
Largest rare earth deposit in North America
ARR managing director Chris Gibbs said: “These results confirm American Rare Earths has discovered a strategically significant rare earth deposit in the USA at Halleck Creek.
“The deposit covers over ten square kilometres and is potentially the largest rare earth deposit in North America.
“The consistency of total rare earth oxide (TREO) grades at increased depth is perhaps the most significant element of the results thus far, considering the small area of the project drilled to date and the consistency of surface samples across the entire project area.”
Major intersections from the new assays continue to show outstanding drill results with consistent TREO grade from the surface including:
- HC22- RM011 averages 3,236 parts per million (ppm) TREO over 150 metres;
- HC22- OM010 averages 3,080 ppm TREO over 145.5 metres;
- HC22- OM011 averages 4,219 ppm TREO over 147.0 metres;
- HC22- OM012 averages 4,256 ppm TREO over 142.5 metres;
- HC22- OM013 averages 4,113 ppm TREO over 136.5 metres;
- HC22- OM014 averages 4,326 ppm TREO over 150.0 metres; and
- HC22- OM015 averages 3,570 ppm TREO over 141.0 metres
These assay results demonstrate that the clinopyroxene quartz monzonite (CQM) remains the primary rare earth element bearing unit within the Red Mountain Pluton (RMP).
The results observed in drill holes HC22-OM011 through HC22-OM015 are significant because they imply continued mineralisation within both the Overton and Red Mountain areas towards the Bluegrass project area to the east.