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To be clear, I'm not dismissing the research, which seems to be more about how they discovered it. I can understand if that was/is an open question, and these possible answers are pretty interesting. I was just wondering if there were competing theories here with reasons to doubt one is more likely than the other.
Many years ago, my roommate was working on his PhD in geology while my history obsession was in full bloom and we talked about this a little. He made some interesting points about iron versus copper supply and how its relative abundance meant that some cultures would have had access to iron long before access to copper. The transition to iron was very slow and some places kept using bronze for centuries. There’s also…
A 3K-year-old copper smelting site could be key to understanding origins of iron
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Interesting, thank you! I would have expected the higher melting point of iron to be a big hindrance compared to copper (and other metals), but hadn't considered the possibility of copper just not being locally present for some ancient cultures.
Re: A 3K-year-old copper smelting site could be key to understanding origins of iron
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I have only assayed samples from the iron cap. You would not expect to find much in that part of the formation but it still came in at 1-2g/ton. There is a large area of visually striking bornite[0] that I have not yet been able to properly sample which is roughly the area you would expect the gold to concentrate. It is in the walls of a narrow, deep canyon at high elevation. The region was mined for gold/copper a ce…
Honesty I know a bunch of people who are burntout climbers and burntout geologists - sounds like a blast. Fun mineralogy with climbing that’s not…super exotic but still fun? I’d pay for it.
Some of those climbs are dangerous though. The Chambless Skarn has a vertical wall of solid epidote you have to scale to reach a massive pocket of world-class hedenbergite, at the top of the mountain. That wall is a few stories tall, and your only grip is the side walls of the rock around you.
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