Just been wondering for a long time.
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You are asking if volcanoes create iron. No. Iron is created in stars. Iron is the last element created in a star before it explodes. Then the rest of the heaver elements are created in the explosion. Can volcanoes concentrate iron, yes they can under certain conditions.
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You may get more precious metals ( including copper, tin and zinc). Iron is a different matter; most of it precipitated out of sea water when oxygen began to become available. It depends on the availability of heat, percolating water, acidity of same and slightly cooler rocks on which the dissolved minerals can plate out.
In the long run, metals tend to slowly sink toward the center of the planet, on the average, so as they get dispersed and then melted under subduction, some amount of it slips beyond our grasp, at least for the moment. That is a glacially slow process.
In the long run, metals tend to slowly sink toward the center of the planet, on the average, so as they get dispersed and then melted under subduction, some amount of it slips beyond our grasp, at least for the moment. That is a glacially slow process.
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This a double answer depending how you look to it. Local you get more resources. But on the world the resources remain constant (if we neglect the input from space and this is negligible) only how easy it can be mined changes. Even this phenomena is local as you also got subduction of earth crust.
So local you can get enrichment but the total stays the same.
So local you can get enrichment but the total stays the same.
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No.