On 08/16/20 9:00 PM, Henry Spencer wrote:
On Sun, 16 Aug 2020, roxanna Mason wrote:
Additionally, may only be coincidence, but the worlds largest elemental copper deposits are found in Michigan south of the
Sudbury deposits perhaps are also of meteoric origin.
The sources of the Michigan copper are fairly well understood and
aren't likely to be meteoric:
<http://geo.msu.edu/extra/geogmich/copper.html>. Nor would there be
any reason for thinking that they are; elemental copper is very rare
in meteorites, and copper in any form is quite scarce in them.
(Copper is not one of the "siderophile" elements that like to hang
around with metallic iron and hence show up in iron meteorites.)
