According to the "Iron Catastrophe" theory, most of the Earth's iron is in the core, yet we still mine gold? - gold metal core wheel

In theory, the Earth was mostly a homogeneous mass of molten hot magma in the early years, then all things have a lot in the liquid hot magma, and was pleased with the things chilling light on top. But we still have iron mines, and more surprisingly, many heavy metals such as gold, uranium, even the densest one, osmium.

Can the earth was really very heterogeneous, with no heavy elements in the crust, in addition to what already bound to lighter compounds, with an average density? Perhaps the enormous quantities of iron and heavier elements came after the bombardment of asteroids?

Check out this statement on 433 Eros:

"That is the theory that Eros has more gold, silver, zinc, aluminum and other metals that are occasionally or never obtained from the upper crust of the earth." Wiki --

One or two of them could really get "a large number of mines.

http://en.wikipedia.org/wiki/433_Eros
http://en.wikipedia.org/wiki/Iron_catast ...