Thank you, I was just going to leave this caveat since if metal prod is 10% of carbon emissions being off by an order of magnitude on all of metal production would've been massive.
The sulfide tailings of some mining regions, as in Spain, may in the future become exploited as sources of sulfur. Today most sulfur comes from desulfurization of oil and natural gas, but in a post-fossil fuel age that source will not be available, so the large amounts of pyrite in these tailings could be exploited instead.