Red Mountain is preparing to embark on an aggressive rare earth elements exploration push at its Mt Mansbridge project in WA’s Kimberley region.

This follows a recent target definition site visit that has allowed the company to complete drill planning for multiple rare earth elements (REE) and nickel-copper-cobalt-platinum group elements targets.

Recent rock chip sampling by Red Mountain Mining (ASX:RMX) has also confirmed the presence of REE mineralisation at multiple prospects.

It added that an unscheduled delay due to claimants availability has meant that the final required heritage survey was rescheduled to the last week of September while the reverse circulation drilling program is now expected to start in October rather than this month.

Rare earths anomalies

Mt Mansbridge hosts three REE targets, Mansbridge, Killi-Killi and Kylo.

The Mansbridge prospect is a xenotime-dysprosium occurrence located within the Killi-Killi formation that was first identified by BHP during uranium exploration in the 1980’s.

It consists of a +200m long zone of mineralisation associated with veining and alteration within the Killi-Killi Basement with recent mapping and rock chipping validating the geology of the prospect and the historical rock chips collected by previous explorers.

Notably rock chip results include values of up to 2,060 parts per million yttrium and 384ppm dysprosium.

Red Mountain plans to drill four RC holes to test the REE mineralisation.

Killi-Killi consists of two geochemical anomalies located about 400m north of the Mansbridge prospect.

The first is a heavy REE anomaly on the western end of the Mt Mansbridge inlier while the second is a light REE that was partially defined by previous soil sampling programs.

A single hole is planned for each of the anomalies.

Kylo is one of the two prospects within the project area with observed xenotime mineralisation.

Assaying returned elevated yttrium and dysprosium values from a ‘siliceous cherty’ unit proximal to the unconformity.

One hole is planned to be drilled into this unit.

Drilling will also test the Déjà vu nickel-copper-cobalt-PGE prospect that was identified and drilled by CRA between 1991 and 1993.

Sporadic sampling and assaying through the ultramafic intrusive unit returned several encouraging cobalt assay results between 70-100m.

Red Mountain intends to drill a traverse of three RC holes across the intrusion to provide e further geological information, intersect the prospective contacts and provide a comprehensive set of samples around the existing cobalt anomaly.




This article was developed in collaboration with Red Mountain Mining, a Stockhead advertiser at the time of publishing.


This article does not constitute financial product advice. You should consider obtaining independent advice before making any financial decisions.