Alan, You said; "Interestingly, some studies have concluded that rocks blasted off of Mercury spend millions of years in independent heliocentric orbits before accreting once again with Mercury." How did our probes reveal enough data to reach such a conclusion? Thanks, Carl Meteoritemax -- Love & Life
---- Alan Rubin <aeru...@ucla.edu> wrote: > The more general question is how we would distinguish a terrestrial > meteorite found on Earth 9as opposed to one found in the lunar regolith). > Unless it was an observed fall, the rock would have to have a fusion crust > for us to notice it in the first place. It would have been exposed to > cosmic rays (gauged by measuring its cosmogenic nuclides) and it should have > the isotopic compositions of terrestrial rocks. Presumably, the rock would > have been extensively shocked or completely melted for it to have been > launched off the Earth to begin with. Interestingly, some studies have > concluded that rocks blasted off of Mercury spend millions of years in > independent heliocentric orbits before accreting once again with Mercury. > > Alan Rubin > Institute of Geophysics and Planetary Physics > University of California > 3845 Slichter Hall > 603 Charles Young Dr. E > Los Angeles, CA 90095-1567 > > office phone: 310-825-3202 > fax: 310-206-3051 > e-mail: aeru...@ucla.edu > website: http://cosmochemists.igpp.ucla.edu/Rubin.html > > -----Original Message----- > From: meteorite-list-boun...@meteoritecentral.com > [mailto:meteorite-list-boun...@meteoritecentral.com] On Behalf Of Jim > Wooddell > Sent: Tuesday, April 8, 2014 2:53 PM > To: meteorite-list@meteoritecentral.com > Subject: Re: [meteorite-list] is it a meteorite > > So, let's say there is one.....a chunk of hematite. > > What tests could be performed to 1. Prove it was in Space. 2. > Originally from Earth. ??? > Radionuclide? > > Jim > > > > > -- > Jim Wooddell > jim.woodd...@suddenlink.net > http://pages.suddenlink.net/chondrule/ > > ______________________________________________ > > Visit the Archives at http://www.meteorite-list-archives.com > Meteorite-list mailing list > Meteorite-list@meteoritecentral.com > http://six.pairlist.net/mailman/listinfo/meteorite-list > > ______________________________________________ > > Visit the Archives at http://www.meteorite-list-archives.com > Meteorite-list mailing list > Meteorite-list@meteoritecentral.com > http://six.pairlist.net/mailman/listinfo/meteorite-list ______________________________________________ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list Meteorite-list@meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list
