Copper production

"It Reflects The Boom In Copper Production Made Possible By The Investment Of Large Amounts Of American Capital That Gave Chile Its Pre-Eminence As A Cooper Producer By The 1920s, A Role That It Still Maintains." (Ab Ev)

"The Copper, Lead And Tin Mines Of Rammelsberg Mountain, In The Harz Region, Were Worked Continuously From The 11th Century Until The 1980s." (Official Description)

"The City Also Served As An Important Regional Agricultural And Copper Production Center" (Wiki)

Copper Mining Took Place Within The Canyon In The Late 19th/Early 20th Centuries. Mine Remains Are Stil Visible
See Minegates.Com

The Umm Al Amad Copper Mines And Underground Galleries Are An Outstanding Example Of Mining Structures Dating From The Fourth Millennium Bc.

"(...) The Location Of Dholavira In The Island Of Khadir Was Strategic To Harness Different Mineral And Raw Material Sources (Copper, (...) Among Others)" (Official Description) "The Evidence Of Copper Metallurgy From The Earliest Stages At Dholavira Clearly Indicate[S] The Smelting Of Copper Ore. The Nearest Copper Sources From Dholavira Is The Ambaji-Deri Copper Mines Located On The Gujarat - Rajasthan Border. A Variety Of Copper Artefacts Clearly Demonstrate[S] The Wide Preference Of Finished Products, Both For The Elite And Lay Persons." (Nomination Text, P. 188)

Kennicott Ghost Town: "The Ghostly Remains Of What Was Once The World's Richest Copper Mine."
See Www.Atlasobscura.Com

North-West Area Of Tramuntana (Component C9): It Contains "Sa Mitja Lluna In Illa D'En Colom, A Prehistoric Copper Mine". (Ab Ev) – Component C9: "The Prehistoric Copper Mine Of Mitja Lluna On Illa D'En Colom Is An Exceptional Site, Not Just Because Of Its Exceptional State Of Conservation, But Also Because It Is Currently The Only Prehistoric Mine Known In The Balearic Isles, And One Of The Few That Have Been Conserved In The South Of Europe." (Nomination File, P. 161-162)