This Australian Mine Was Worth Billions

#minerals #mine #australia #volcano What if one of Australia's richest mines began as an underwater volcano on the floor of an ancient ocean? In this episode, we explore the remarkable geology of the Woodlawn Mine in New South Wales, a volcanogenic massive sulphide (VMS) deposit that formed more than 430 million years ago beneath a Silurian sea. Long before Australia existed in its modern form, hydrothermal fluids circulated through volcanic rocks, dissolving metals and transporting them toward the seafloor. When these metal-rich fluids erupted into cold seawater, they deposited vast quantities of copper, zinc, lead, silver and gold, creating a fossilized hydrothermal vent system that would eventually become one of Australia's most important base metal deposits. Discover how the Woodlawn orebody formed, how hydrothermal vents concentrated valuable metals, and why geologists believe this ancient deposit preserves both the seafloor sulphide mounds and the stockwork feeder system beneath them. Learn how pyrite, chalcopyrite, sphalerite and galena accumulated within the deposit, how precious metals including silver and gold became concentrated within the system, and why Woodlawn is considered a textbook example of a volcanogenic massive sulphide deposit. We also examine the tectonic history of the Lachlan Fold Belt and how millions of years of burial, compression, folding, faulting and metamorphism transformed an ancient ocean-floor hydrothermal system into the orebody mined during the twentieth century. Despite this deformation, the rocks still preserve the alteration halos, metal zoning patterns and geological fingerprints that allow scientists to reconstruct the original hydrothermal vent field. From underwater volcanoes and black smoker systems to copper mines, gold mineralization, silver deposits and economic geology, this video explores the extraordinary journey of a fossilized seafloor metal factory hidden beneath New South Wales. If you enjoy videos about geology, mining, gold deposits, hydrothermal vents, volcanogenic massive sulphide deposits, Australian mining history, ore deposit geology, mineral exploration, economic geology and the geological evolution of Australia, be sure to subscribe and leave a comment letting me know what geological story you'd like to see covered next. Thank you so much for watching! If you are not in a position to donate, I totally understand! The biggest supporting factor that you engage in is to watch our videos all the way to the end (very important for helping us rank) and to share them around so please consider doing this so that Youtube recommends our channel more. Check out the OzGeology website: https://ozgeology.com If you are in a position to support our channel on Youtube Membership or by joining our Patreon, the link to all of this can be found below: 🎥 If you would like to support this channel, consider joining our Patreon: https://patreon.com/OzGeology 👉 You can also click the "join" button to join our Youtube channel's membership. Every contribution helps to create more videos. YouTube Membership: https://www.youtube.com/channel/UCxLrvjGBzYmj8W1rJToPasg/join 🌋 Subscribe to our Youtube Channel: https://www.youtube.com/channel/UCxLrvjGBzYmj8W1rJToPasgsub_confirmation=1 💥Link To Our Facebook: https://facebook.com/OzGeology 🌏 About OzGeology The core mission of OzGeology is to make geology exciting, accessible, and inspiring for everyone. Instead of presenting rocks and earth science as dry or overly academic, OzGeology brings stories of the planet to life, revealing how every mountain, mineral, and landscape tells part of Earth’s grand adventure. The goal is to help people see the world differently, to understand the dynamic forces shaping Australia and beyond, and to spark curiosity in the next generation of geologists. Through engaging storytelling, field exploration, and clear explanations, OzGeology turns the study of our planet into a journey of discovery rather than a classroom lecture.