Quote:Why are there no meteorites that contain precious metals like gold, silver or platinum, at least in trace amounts?
Thanks for the pointers to those articles. I remember reading them a while ago but had lost track of them. They are talking about ancient bombardments of the earth. Did meteorites back then have a greater abundance of precious metals than those of today? It would seem to require a heap of bombardment to really deliver any significant amounts of precious metals if the abundances were the same as the ones Peter cites above.
So, do all meteorites have the abundances of precious metals cited above or just certain types? I've never seen any meteorites touted as containing any precious metals at all. You'd think sellers would play that feature up, even if the amount isn't enough to make you rich.
Michael Gilmer - Member of the Meteoritical Society & Collector of Falling Stars.
☄ ⒼⒶⓁⒶⒸⓉⒾⒸ ⓈⓉⓄⓃⒺ - www.galactic-stone.com
Quote:But if precious metals were brought to earth by subsequent bombardments, then the earth and moon should have been bombarded in the same way, resulting in similar ratios of precious metals. No?
As a general rule, the abundance is lowest in achondrites increasing in chondrites then more in stone irons and finally the highest in irons.
I am trying to imagine a process by which there were meteorites with higher concentrations of precious metals in the past, but I can't think of any. Earth seems well made to concentrate precious metals.