A new Quarterly Note published by the Geological Survey of NSW highlights the dramatic centuries-old history of the state’s metalliferous mining industry, tracing its evolution from early colonial exploration to a modern, globally significant sector.
The report acknowledges the occurrence of metals discovery and mining in the centuries prior to European settlement but begins its analysis of NSW mining shortly after the 1800s noting the small-scale extraction of iron, copper and minor gold.
However, the authors note that the industry was transformed in 1851 when gold was discovered at Ophir, sparking Australia’s first major gold rush. Thousands of people flocked to the region, driving rapid population growth and laying the foundations for many regional towns.
Over time, mining expanded beyond alluvial gold deposits into hard-rock mining, supported by advances in technology and increasing investment. By the late 19th century, NSW experienced a series of major mineral booms; copper at Cobar, tin in the New England region and silver-lead at Broken Hill, cementing the state’s role as a key mining hub.
The development of infrastructure, particularly railways, played a crucial role in sustaining mining operations. Improved transport reduced costs and enabled large-scale extraction, while advances in technology and ore processing allowed lower-grade deposits to become economically viable.
The 20th century brought both challenges and resurgence. Many mines closed following World War I due to falling prices and reduced investment. However, renewed demand and technological advancements saw the reopening of operations in Cobar and discovery of new deposits. Major projects such as CSA at Cobar and later discoveries like Woodlawn, Northparkes and Cadia helped revitalise the sector and continue to be globally significant gold operations to this day.
Since World War II, mining in NSW has shifted toward large-scale, highly mechanised operations targeting deeper and lower-grade ore bodies. Significant modern developments including Cadia, one of the largest gold-copper deposits in eastern Australia, demonstrate the continued global importance of the state’s resources and forecast a bright future for the regional communities and economies they support.
Today, the NSW mining industry remains a major economic driver for the state, producing key commodities such as gold, copper, silver, zinc and tin along with the critical minerals and high-tech metals needed to power our modern way of life.
The report concludes that while mining in NSW has faced repeated booms and downturns, its ability to adapt through the adoption of new technology, investment, exploration and improved extraction techniques, has ensured the sector’s ongoing significance.
The mining industry continues to evolve, supported by the Critical Minerals and High-Tech Metals strategy which boosts exploration and investment in key metals like copper, cobalt, scandium and the rare earths needed for advanced technologies and the transition to renewable energy sources. The Geological Survey NSW’s Mine Reuse Project embodies the intersection of mining’s great past and its future. By reinvestigating old mine sites, the program is uncovering the critical minerals vital to the modern manufacturing and advanced technologies of the next century.
Download Quarterly Notes issue no.160 and previous issues here.
