mt mansbridge

Western Australia (100%* Volcanic)

Located in the Kimberley region of Western Australia, the licence area consists of two adjacent exploration licences E80/5111 and E80/5229 (application) which combined covers a total area of 245km². Within the project area is the Killi Killi Prospect which contains xenotime, a mineral that contains Rare Earth Elements (REE). Killi Killi is located only 40km from Northen Minerals’ Brown’s Range REE mine and is drill ready. Killi Killi is a priority for the Company, considering the world’s requirement for new sources of REE supply. Also within the project area is the Déjà vu Prospect that has known high-grade cobalt of up to 0.34% from drilling.


Size and grade

REE mineralisation at Killi Killi was first discovered in the altered and veined sandstone beds of the Mt Mansbridge outlier in the 1980’s. Recent exploration activities has defined a 1.5km REE soil anomaly via Mobile Metal Ion (MMI) and conventional soil geochemistry. The mineralisation model is of an “unconformity-related” system, akin to Northern Minerals’ Brown’s Range Dazzler and Iceman prospects, located 40km away.

The Déjà vu Prospect consists of a magnetic anomaly that is 0.8km in diameter was drilled with a solitary hole that encountered cobalt grades of up to 0.34% over 2m at 84m drilled depth. Mineralisation is hosted in a metamorphosed ultramafic, that also contains disseminated copper and nickel sulphides (chalcopyrite and pentlandite, respectively).


The regional geology comprises granite intruded mixed marine sedimentary rocks of the Palaeoproterozoic Tanami Complex which are unconformably overlain by a Mesoproterozoic platform cover sequence of clastic sedimentary rocks of the Birrindudu Basin. The Tanami Complex rocks of the area are greenschist-facies metamorphosed and strongly folded Killi Killi beds consisting of greywacke, arenite, siltstone and minor volcanics. Hydrothermal events have produced scattered chlorite/sericite alteration zones and numerous quartz veins.

On the northern side of the Mt Mansbridge Palaeoproterozic inlier GSWA record locally occurring units of Pargee Sandstone which unconformably overlie Killi Killi Formation but in turn are overlain unconformably by the Birrindudu Group Rocks. These rocks, along with the Supplejack Downs Sandstone and Mount Winnecke Formation occur elsewhere over the Billiluna complex and are clearly post Killi Killi and pre-Mesoproterozoic. Volcanic rocks in the Winnecke Formation and Winnecke Granophyre are dated to the period 1825-1790 ma with a most likely age 1810-1800ma.

Exploration licence E80/5111 showing regional aeromagnetics and historic sampling activities

Geological map and previous drilling of the Déjà vu Prospect

work to date and moving forward

The project area has been subject to exploration activities since the early 1980’s, primarily for diamonds, uranium and gold (they were unsuccessful). The presence of the mineral xenotime in the Killi Killi prospect has been overlooked and Volcanic Metals now sees the opportunity to capitalise on this and determine whether there is an economically viable REE concentration. The existing data consists of geophysics (magnetics, electromagnetics and radiometrics), mapping, geochemistry, and drilling.

The Killi Killi Prospect is drill ready, and is treated as a priority considering the world’s demand for new sources of REE supply.


The Mt Mansbridge Project is located approximately 130 kilometers south east of the township of Halls Creek, in the Birrindudu Basin region of northern Western Australia. The project is located on the 1:250,000 map sheet of Billiluna (SE5214) and on the 1:100,000 map sheet of Slatey Creek.

Access to the project is by aircraft from Broome to Halls Creek, followed by 4WD access to the project area is via sealed and unsealed roads.

*Subject to the terms of the Sale Agreement with Unearthed Resources Pty Ltd.