Overview

Mine Type	Underground
Status	Active
Commodities	Copper Gold Silver
Mining Method	Truck & Shovel / Loader
Mine Life	...
Snapshot	The Kanmantoo Open cut mining was completed in May 2019 and the processing of ore stockpiles completed in March 2020. In 2020 Hillgrove Resources commenced exploration and economic studies to evaluate the potential for an underground operation to be developed. The Kanmantoo underground project is fully permitted and has all of the infrastructure already in place, including an operational 3.6Mtpa processing plant, and a tailings storage facility with plenty of spare capacity. In mid-2023 the underground commenced development with a single decline towards the base of one of the pits. In early 2024, the processing plant was recommissioned, and copper production commenced.

Deposit type

• Epithermal

Summary:

The copper-gold deposit is part of the Kanmantoo Trough, which is the youngest of a succession of extensional sub-basins developed within the Adelaide Geosyncline. The Kanmantoo orebody comprises three main mineralised zones: Main, O’Neil/Nugent and Emily Star. Each of the ore zones contains an oxide, transition and primary sulphide ore component.

The Main Zone is hosted by a garnet-andalusite-biotite schist within the Cambrian Kanmantoo Group. Copper mineralisation occurs as chalcopyrite within a complex series of northern trending steep northeast plunging pipes and lodes 3 to 80 m wide (Figure 5.4) (Resource Evaluations, 2006). Mineralisation is characterised by chalcopyrite, pyrrhotite and magnetite with lesser pyrite. In the Emily Star Zone, mineralisation is characterised by chalcopyrite and pyrite. Mineralisation in the O’Neil/Nugent Zone is associated with a garnet-chlorite hydrothermal alteration zone with quartz veining. In comparison with the other zones, the O’Neil/Nugent Zone is enriched in gold.

Sulphide becomes less common with distance from the ore zone indicating there is likely to be broad zones of non-sulphidic waste rock outside of the main mineralised blocks. Across the ML area, there is a distinct weathering zone of approximately 15 m depth that appears to be completely oxidised. This oxidised zone is an important source of non-acid-forming (NAF) material suitable for use in encapsulation of the potentially acid-forming (PAF) waste material.

Mining Methods

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Comminution

Crushers and Mills

Processing

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Production

Operational metrics

Personnel

Job Title	Name	Phone	Profile	Ref. Date
.......................	.......................	...........		Feb 15, 2024
.......................	.......................			Jun 1, 2024
.......................	.......................			Feb 15, 2024

Employees	Contractors	Total Workforce	Year
......	......	......	2018
......	......	......	2017