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Deposit Synonyms
Mineral District
Deposit Summary
KOOKABURRA GULLY EXTENDED, graphite deposit occuring over a 5 km long corridor, which extends southwest from the main Kookaburra Gully deposit. The host rock is a graphitic schist within a parcel of metasedimentary units of the Palaeoproterozoic Hutchison Group. The resource estimate as of 16/04/2024 is 5.7 Mt @ 5.15% TGC @ 2% cut-off.
Deposit Description
KOOKABURRA GULLY EXTENDED, graphite deposit defined by multiple electromagnetic anomalies over a 5 km long corridor, which extends southwest from the main Kookaburra Gully deposit. The host rock is a graphitic schist within a parcel of metasedimentary units of the Palaeoproterozoic Hutchison Group. The coarse-grained flake graphite mineralisation is generally stratabound and is interpreted as the high-grade metamorphic equivalent of original carbonaceous sediments, formed by upper amphibolite- to- lower granulite facies metamorphism.
Near-surface rocks at the deposit have been extensively weathered and oxidised to a clay-rich graphitic schist. At depths below 130 m AHD this grades into fresh graphite schist and then into a locally pyritic graphite schist. The host rocks are garnet-biotite gneiss with local pegmatite and marble. The graphite schist strikes 30° and dips 50° to sub-vertical to the east. The graphite units have been folded multiple times and/or sheared during at least three phases of deformation.
Graphite mineralisation was initially delineated by an airborne electromagnetic (EM) survey completed in 2012. The central portion of the EM anomaly was first drilled by Lincoln Minerals in 2017 (program consisting of 100 air core and RC holes for ~5,340 m). The southern are was drilled by Lincoln Minerals in 2023 (44 air core holes for 2,940 m), leading to the maiden resource estimate (indicated + inferred) of 5.7 Mt @ 5.15% TGC (2% cut-off grade) (Lincoln Minerals, Dec 2023).
Discovery Year
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Commodities
Graphite
Ore Minerals
Gangue Minerals
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