[rellimpank]

--thanks--having been a hardrock miner most of my life, I'm more interested in what are the ultimate sources of geologic wonders such as the porphyry copper deposits, the Homestake orebody, etc.,--

--my point was that we really have little detail knowledge of events and processes that deep except that they occur in high temperature, high pressure environments-

[UnbelievingScumOnTheOtherSide]

I’ve had an idea that many concentrated surface ore bodies came from the cores of crashed asteriods. May be totally off-whack here though.