One of The Richest (& Strangest) Goldfields in Australia

Описание: #gold #queensland #goldprospecting
Deep in the dry savanna of north Queensland lies one of the most extraordinary gold discoveries in Australian history. The Charters Towers goldfield produced more than 6.6 million ounces of gold, making it one of the richest historic goldfields on the continent. At today’s gold price of $7,335.42 per ounce, that production represents more than $48 billion worth of gold in modern value. But what makes Charters Towers truly fascinating isn’t just how much gold was found here. It’s the strange way the field was discovered, the incredible grades of its ore, and the unique geology that concentrated so much gold into such a small area.

Unlike most Australian gold rushes, Charters Towers did not begin with an alluvial discovery. In famous fields like Ballarat and Bendigo, prospectors first found gold in river gravels before tracing it back to quartz reefs. At Charters Towers the process happened in reverse. The field was discovered directly in hard rock quartz veins, meaning miners immediately began chasing gold underground instead of panning creeks. This unusual discovery helped make Charters Towers one of the strangest gold rushes in Australian history.

The gold deposits formed deep within the ancient rocks of the Ravenswood Batholith, part of the northern Tasman Orogen. These rocks formed hundreds of millions of years ago during major tectonic events that built the eastern edge of the Australian continent. During this time, hot hydrothermal fluids moved through fractures in the crust, carrying dissolved gold and other metals. When those fluids rose through brittle fractures in the granite, changes in pressure and temperature caused the gold to crystallise, forming quartz veins rich in sulfide minerals and native gold.

One of the most remarkable features of the Charters Towers goldfield is the grade of the ore. Historic mining records show an average grade of around 34 grams of gold per tonne of rock. For comparison, many modern gold mines operate on grades of just 1 to 3 grams per tonne. That means the ore at Charters Towers was often 10 to 30 times richer than the deposits mined today. Some of the major reefs, including the famous Brilliant Reef and the Day Dawn–Mexican system, produced millions of ounces of gold from narrow veins only a few metres wide.

Studies Used To Construct This Video:
Lode controls of the Charters Towers goldfield, northeastern Queensland:
https://www.researchgate.net/profile/...

Intrusion-Hosted Mineralization in the Charters Towers Goldfield, North Queensland: New Isotopic and Fluid Inclusion Constraints on the Timing and Origin of the Auriferous Veins:
https://pubs.geoscienceworld.org/segw...

Ore controls in the Charters Towers goldfield, NE Australia: Constraints from geological, geophysical and numerical analyses:
https://www.sciencedirect.com/science...

Geologic, Fluid Inclusion, and Stable Isotope Studies of Granitoid-Hosted Gold-Bearing Quartz Veins, Charters Towers, Northeastern Australia:
https://pubs.geoscienceworld.org/segw...

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