Just to add context to pingaling's post, copper output from Escondida, the world's largest copper mine, was 234,229 tonnes for the latest quarter:
http://www.reuters.com/article/rbssIndustryMaterialsUtilitiesNews/idUSN2943679120090429
Also not exactly comparing apples with apples, but Newcrest mining last year produced 1.7 million ounces of gold and 87 thousand tonnes of copper:
http://newcrest.ice4.interactiveinvestor.com.au/Newcrest0801/Concise%20Annual%20Report%202008/EN/body.aspx?z=1&p=2&v=2&uid=
