Mt William gDesign 19 May 2023

Mt William

NI-PGM PROSPECT Mt William is subject to Exploration License application E70/2338. Located near Waroona, 100km south of Perth in the South West Yilgarn Terrane, the main target at Mt William is a 3.5km long, very prominent magnetic feature that is interpreted to be a layered mafic complex with potential for Ni-PGM mineralisation.


Dominated by deep laterite weathering profiles typical of the Darling Plateau, with no outcrops present in the area to indicate basement geology and the source of the magnetic anomaly. There is no recorded previous exploration or drilling in this area other than shallow drilling for bauxite exploration to the north.

Although no ages have been determined for the layered intrusions, the Gonneville intrusion lies within the Jimperding Metamorphic Belt which is considered to be of similar age and origin to the Balingup Metamorphic Belt that hosts the Mt William intrusion (see map below). Both belts are believed to have similar origins and histories and have metamorphic ages dated around 3.2 to 2.8 billion years old (Cassidy et al., 2006).

The Mt William prospect is located in a cleared forest area and within Alcoa’s Mineral Lease 1SA which was granted to Alcoa under the Alumina Refinery Agreement Act 1961 pertaining to Alcoa’s mining and refining interests. Caravel is actively working to resolve an objection to application E70/2338 made by Alcoa.

Schematic geology map of the South West at Mt William

Schematic geology map of the South West

Schematic geology map of the South West Yilgarn Terrain –modified after Porter, 2017 – showing the location of the Julimar/Gonneville intrusion in the Jimperding Metamorphic Belt and the Mt William intrusion in the Balingup Metamorphic Belt.


The Mt William nickel and platinum group elements (PGE) prospect near Waroona, Western Australia (E70/2338 pending grant) is subject to a joint venture between Caravel Minerals Limited and Round Oak Minerals.

Under the joint venture agreement with Round Oak – a subsidiary of Aeris Resources Limited – Caravel Minerals will serve as the operator of Mt William whilst it holds an interest of 51 per cent or more. As manager, Caravel Minerals is working to progress the grant of the E70/2338 application.

These two gravity images are at the same scale and show the  comparison of airborne magnetics at the Mt William and Gonneville intrusives.

Caravel Minerals CVV Mt William Intrusive
Mt William Intrusive
*TMI Magnetic Images – Geological Survey of Western Australia.
Caravel Minerals CVV Gonneville Intrusive
Gonneville Intrusive
*TMI Magnetic Images – Geological Survey of Western Australia.