Ann: Exploration Update on Initial Drilling at Durnings South, page-45

No, not all mines in the Gawler Craton are deep; while some major deposits like Olympic Dam are considered deep underground mines, the Gawler Craton also contains near-surface and open-pit mines, particularly in the "Olympic Domain" where many of the significant copper-gold-uranium deposits are located, meaning the depth of mining operations varies depending on the specific deposit being exploited.










The Prominent Hill deposit in the Gawler Range is mined at depths reaching around 450 meters deep, with the main shaft currently being expanded to this depth.

Key points about the Prominent Hill deposit:

• Discovery hole depth: The initial discovery drill hole, "URN001", intersected significant mineralization at depths around 200 meters and further down at 429 meters.
• Ore body type: The ore is hosted within a hematite breccia.
• Mining operations: The mine utilizes both underground open stoping and shaft access to reach the ore body.

According to available information, the Cairn Hill deposit in the Gawler Craton is explored to a depth of approximately 170 meters. This depth refers to the tested areas within the North and South Lodes, which are the main mineralized zones at the mine site.

Key points about the Cairn Hill deposit:

• Mineralization: The deposit contains iron, copper, and gold mineralization.
• Geology: The mineralization occurs within quartz-magnetite-apatite units, referred to as the North and South Lodes.
• Exploration depth: Testing has been conducted down to around 170 meters.

...