Great Southern Graphite Project
The Great Southern Graphite Project has a combined area of 150km² (granted licences) with bedrock geology interpreted to be gneiss, granitoids and remnants of Archean mafic rocks. The majority of the area is covered by laterite soils. The Project comprises mostly freehold farmland to the west of the township of Kendenup in the southwest of Western Australia. It is well serviced by infrastructure being approximately 12km north of the regional centre of Mt Barker and 62km north of the Port of Albany.
Castle Minerals Limited has entered into a Tenement Sale Agreement and also applied for an adjacent exploration licence covering the historical Kendenup graphite mine and the nearby Martagallup graphite occurrences.
A 1913 report by the Inspector of Mines stated that the Kendenup mine workings on the to be purchased, 16-block granted licence (EL70/5514) comprised a 15m-deep vertical shaft and some 20m of level development onto an east-west striking array of veins, lenses and seams of graphitic material. It is not known to what extent these workings were subsequently extended. Aside from reconnaissance regional programs for gold and base metals, little modern exploration appears to have been completed on the Kendenup licence area.
- Martagallup licence (E70/5963) hosting the historical Martagallup workings in its north is now granted.
- Application made for 133km² exploration licence (ELA70/6116) encompassing the Mt. Barrow graphite occurrence, 15km south east of Castle’s Kendenup licence area.
- Graphite mineralisation has also been intersected in the south of the Martagallup licence by third-party diamond drill testing of an electromagnetic (EM) anomaly primarily for base metals.
- Martagallup Licence is adjacent to the granted Kendenup licence hosting the historical Kendenup workings.
- The EM anomaly appears to be along strike from the Kendenup graphite workings and may represent an extension to the horizon that hosts the Kendenup graphite.
- The grant of both licences (150km²) facilitates a more rapid, unified and cost-effective approach to evaluation.
- Ground EM survey to commence shortly¹ to better define and extend existing EM anomaly with follow-up drill testing then proposed.
- The Great Southern graphite project is a key component of Castle’s Battery Metals strategy which now comprises the Wilgee Springs lithium, Woodcutters lithium and the Kambale graphite projects.
¹ The granted exploration permit relates to subsurface rights and there is a requirement to enter into land access agreements with individual private landowners before DMIRS will grant surface exploration rights. This is a standard requirement and is being progressed through a specialist contractor.
Highlights July 2022
- Eight high-priority anomalies identified by a low-impact, orientation Loupe ground EM survey on the Great Southern Graphite Project’s Kendenup and Martagallup licences.
- Reinforces view that there is considerably more graphite mineralisation to be discovered in the area.
- Intention is to progressively extend the Loupe EM across more areas of interest.
- The commissioning of a low-impact and complementary airborne EM survey is being evaluated following a major expansion of the Project’s footprint with the recent application for the Mt. Barrow exploration licence.
- The extended Kendenup graphite project is a key component of Castle’s evolving Battery Metals strategy which also includes the Kambale graphite project (Ghana) where a major drilling program is underway and the Wilgee Springs and Woodcutters lithium projects (Western Australia).
Castle Managing Director, Stephen Stone commented: “The eight high-priority anomalies identified by a recent Loupe EM survey on Castle’s Great Southern Graphite Project’s Kendenup and Martagallup licences reinforce our view that there is considerably more graphite mineralisation to be discovered in the area.
“Having proven the effectiveness of the new Loupe technology we plan to extend our work across more areas of interest.
“The recent Mt. Barrow exploration licence application substantially expands our presence in the region and so justifies the commissioning of a low-impact and complementary airborne EM survey to facilitate a rapid determination as to where we should focus our attention.”