Most mining claims in various countries are handled through various federal and state registries like https://tenementregister.sarig.sa.gov.au/ and https://www.business.qld.gov.au/industries/mining-energy-water/resources/landholders/searches and https://www.qld.gov.au/environment/land/management/abandoned-mines ... "Sites are classed as ‘abandoned’ once a mining tenure no longer exists. There are about 120 complex abandoned mine sites in Queensland. Some, such as Mount Morgan, Mount Oxide, and Hopeland (ex-Linc Energy), are currently managed through the Abandoned Mine Lands Program (AMLP). The program also manages subsidence issues at Collingwood Park and remediation of smaller mine sites." and https://www.business.qld.gov.au/industries/mining-energy-water/resources/minerals-coal/online-services/georesglobe ...

• Access to permit, geoscience and native title spatial data.
• Links to resource authority reports.
• Ability to view and query map layers.

Your mileage may vary. Where I live, the state has actually scanned the original engineering drawings, some from the 1800's because the area is honeycombed with shafts and tunnels. Real estate developers get upset when their bulldozers vanish down a shaft.

Also, any interesting area has rock hound clubs and some even are specifically around amateur activities like panning and smelting - they also collect mining memorabilia like maps, tools, etc.