[meteorite-list] is it a meteorite

From: Alan Rubin <aerubin_at_meteoritecentral.com>
Date: Wed, 9 Apr 2014 09:26:34 -0700
Message-ID: <029401cf5410$7ab42530$701c6f90$_at_ucla.edu>

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: aerubin at ucla.edu
website: http://cosmochemists.igpp.ucla.edu/Rubin.html

-----Original Message-----
From: meteorite-list-bounces at meteoritecentral.com
[mailto:meteorite-list-bounces at meteoritecentral.com] On Behalf Of
cdtucson at cox.net
Sent: Wednesday, April 9, 2014 6:37 AM
To: Alan Rubin; 'Jim Wooddell'; meteorite-list at meteoritecentral.com
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 <aerubin at 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: aerubin at ucla.edu
> website: http://cosmochemists.igpp.ucla.edu/Rubin.html
> 
> -----Original Message-----
> From: meteorite-list-bounces at meteoritecentral.com
> [mailto:meteorite-list-bounces at meteoritecentral.com] On Behalf Of Jim 
> Wooddell
> Sent: Tuesday, April 8, 2014 2:53 PM
> To: meteorite-list at 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.wooddell at suddenlink.net
> http://pages.suddenlink.net/chondrule/
> 
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Received on Wed 09 Apr 2014 12:26:34 PM PDT