This refers to modeling, not actual observations. Gladman and Coffey (2009) MPS 44, 285-291 calculated that Mercury ejecta could achieve independent orbits and re-accrete to Mercury after several million years.
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: [email protected] website: http://cosmochemists.igpp.ucla.edu/Rubin.html -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: Wednesday, April 9, 2014 6:37 AM To: Alan Rubin; 'Jim Wooddell'; [email protected] Subject: Re: [meteorite-list] is it a meteorite 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 <[email protected]> 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: [email protected] > website: http://cosmochemists.igpp.ucla.edu/Rubin.html > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Jim > Wooddell > Sent: Tuesday, April 8, 2014 2:53 PM > To: [email protected] > 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 > [email protected] > http://pages.suddenlink.net/chondrule/ > > ______________________________________________ > > Visit the Archives at http://www.meteorite-list-archives.com > Meteorite-list mailing list > [email protected] > http://six.pairlist.net/mailman/listinfo/meteorite-list > > ______________________________________________ > > Visit the Archives at http://www.meteorite-list-archives.com > Meteorite-list mailing list > [email protected] > http://six.pairlist.net/mailman/listinfo/meteorite-list ______________________________________________ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list [email protected] http://six.pairlist.net/mailman/listinfo/meteorite-list ______________________________________________ Visit the Archives at http://www.meteorite-list-archives.com Meteorite-list mailing list [email protected] http://six.pairlist.net/mailman/listinfo/meteorite-list
