Qualla: Challenger mine https://qualla.com/challenger-mine en-us © 2026 Bendyline Mon, 20 Jul 2026 10:21:26 GMT Qualla serial false Qualla support@bendyline.com yes https://qualla.com/_m/q/f/w/y/challenger-mine-wp/hero-small.webp Qualla: Challenger mine https://qualla.com/challenger-mine Challenger mine: Introduction https://qualla.com/challenger-mine/ Photo credit Maelgwn, CC BY-SA 3.0. It was named after a dog. When the geologist David Edgecombe pulled gold from this patch of the South Australian outback in 1995, he called the deposit Challenger, after his own faithful companion - a working-dog name now attached to one of the most remote gold mines in the country. The discovery itself owed a good deal to chance. A drilling grid spaced 800 metres apart, wide enough to miss almost anything, happened to snag a single soil sample shot through with gold. One lucky hit, and a mine was born in country so empty it sits inside a weapons range.

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Image: Maelgwn | CC BY-SA 3.0

]]> Mon, 22 Jun 2026 00:00:00 GMT https://qualla.com/_m/q/f/w/y/challenger-mine-wp/qfwy-challenger-mine-intro.mp3 0:06 1 full Challenger mine: Gold in the Crust https://qualla.com/challenger-mine/ Photo credit Maelgwn, CC BY-SA 3.0. The find came from a then-novel technique: sampling calcrete, the hard crust of calcium carbonate that caps so much of the arid Australian surface. Gold, washed and concentrated near the surface over ages, leaves a faint chemical fingerprint in that crust. Dominion Mining's broad...

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Image: Maelgwn | CC BY-SA 3.0

]]> Mon, 22 Jun 2026 00:00:00 GMT https://qualla.com/_m/q/f/w/y/challenger-mine-wp/qfwy-challenger-mine-gold-in-the-crust.mp3 0:06 2 full Challenger mine: Nearly Three Billion Years Down https://qualla.com/challenger-mine/ Photo credit Maelgwn, CC BY-SA 3.0. The rock here is staggeringly old. The Challenger deposit sits within Christie gneiss, part of the Mulgathing Complex, in the Gawler Craton - an ancient slab of crystalline basement whose rocks stabilised around 2,415 million years ago and reach back into the Neoarchean, close to...

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Image: Maelgwn | CC BY-SA 3.0

]]> Mon, 22 Jun 2026 00:00:00 GMT https://qualla.com/_m/q/f/w/y/challenger-mine-wp/qfwy-challenger-mine-nearly-three-billion-years-down.mp3 0:06 3 full Challenger mine: A Mine Inside a Weapons Range https://qualla.com/challenger-mine/ Photo credit Maelgwn, CC BY-SA 3.0. There is no easy way to reach Challenger. It lies in the Far North of South Australia, around 740 to 750 kilometres northwest of Adelaide, on the Jumbuck Pastoral Company's lease - and squarely inside the Woomera Prohibited Area, the vast military testing zone that covers a chunk...

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Image: Maelgwn | CC BY-SA 3.0

]]> Mon, 22 Jun 2026 00:00:00 GMT https://qualla.com/_m/q/f/w/y/challenger-mine-wp/qfwy-challenger-mine-a-mine-inside-a-weapons-range.mp3 0:06 4 full Challenger mine: The Gold Runs Out, the Rock Endures https://qualla.com/challenger-mine/ Photo credit Maelgwn, CC BY-SA 3.0. For a remote mine, Challenger was a real producer. In 2007 it held an estimated reserve of 512,000 ounces of gold from a resource of a million ounces; a decade later, on paper, it still carried hundreds of thousands of ounces at a healthy grade. But the economics of digging gold ...

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Image: Maelgwn | CC BY-SA 3.0

]]> Mon, 22 Jun 2026 00:00:00 GMT https://qualla.com/_m/q/f/w/y/challenger-mine-wp/qfwy-challenger-mine-the-gold-runs-out-the-rock-endures.mp3 0:06 5 full