preparation for the return of the first Martian samples in 2008, we are
studying Martian meteorites in an effort to understand the evolution of
the red planet. As these meteorites span ages from >4 billion
to < 200 million years. We have currently analyzed 3 of the 13
known Martian meteorites and have determined trace elements and PGEs
ICP-MS. Not only have we demonstrated major problems with the
data base, but our new data suggests a change in magma source and
over time. We have a further 8 samples on the way for analysis to
continue this study.
Papers resulting from this research:
Jones J.H., Neal C.R., and Ely
(2003) Signatures of the highly
siderophile elements on the SNC meteorites and Mars: A review and
petrologic synthesis. Chem.
Geo. 196, 21-41.
Taylor L.A., Nazarov
M.A., Shearer C.K., McSween H.Y., Jr., Cahill J., Neal C.R., Ivanova
Barsukova L.D., Lentz R.C., Clayton R.N., and Mayeda T.K. (2002) Martian meteorite Dhofar 019:
A new Shergottite. Meteor. Planet. Sci.
Neal C.R. (2000) Issues involved in a Martian sample return: Integrity preservation and the Curation and Analysis Planning Team for Extraterrestrial Materials (CAPTEM) position. J. Geophys. Res. 105, 22,487-22,506.
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