Where Basalt Is Mined in Australia: State-by-State Guide

Australia's vast basalt resources—remnants of Cenozoic volcanic activity across the continent—support significant quarrying operations in every mainland state. Here are the major production regions.

Queensland

• Darling Downs / Toowoomba–Warwick corridor: Main Range Volcanics; high-quality blue metal for road base, rail ballast, concrete aggregate
• North Queensland (Atherton Tablelands, McBride): Younger flows; construction aggregate

New South Wales

• Northern Tablelands (Armidale, Uralla, Glen Innes): New England Volcanics; extensive quarries supplying NSW/QLD markets
• Sydney Basin margins (Kiama, Gerroa): Gerringong Volcanics; specialized aggregate
• Western Slopes (Orange, Bathurst): Canobolas Volcanics; road construction material

Victoria

• Western District (Colac, Camperdown, Warrnambool): Newer Volcanics Province (4.6 Ma–present); world-class "bluestone" for dimension stone, paving, heritage restoration
• Melbourne fringe (Craigieburn, Wollert): Urban quarrying for infrastructure projects

South Australia

• Mount Gambier / Limestone Coast: Pleistocene volcanic complexes; basalt overlying limestone; aggregate, road metal
• Adelaide Hills (Prospect, Tea Tree Gully): Historical quarries, now largely exhausted/urbanized

Western Australia

• Kimberley (Derby, Broome, Fitzroy Crossing): Kimberley Basalt (Proterozoic, ~1.8 Ga); remote, low-volume, local infrastructure use
• Southwest (Bunbury, Busselton): Bunbury Basalt (Cretaceous); construction aggregate

Tasmania

• Northwest (Stanley, Smithton): Tertiary basalts; agricultural lime, road base
• Central Highlands: Dolerite (jurassic) often quarried similarly

Industrial Applications

• Road base & sub-base (main use by volume)
• Concrete & asphalt aggregate
• Rail ballast
• Dimension stone (Victoria "bluestone" pavers, curbs, building facing)
• Soil amendment (crushed basalt re-mineralization trials)

Production is dominated by large quarry groups (Holcim, Boral, Hanson, local independents). Environmental regulation varies by state; rehabilitation bonds standard.