[meteorite-list] RE: The Other Mars Meteorite - Lafayette Meteorite

[Robert Verish]

Ron,

The reference that I forward to you (Jull, 1997) calls
out a terrestrial age for Lafayette as being ~9kya.
I still haven't found the reference that brings that
age down to the "2,900 years ago" that Astrobiology
Magazine staffwriter, Dr. David Noever, wrote about in
his article. 

I may have to trouble Herr Lehrer, Dr. Pauli, to help
us find this reference?
:-)

Regards,
Bob V.

-----Original Message-----
From: Verish, Robert S 
Sent: Wednesday, September 15, 2004 11:44 AM
To: Baalke, Ronald C
Subject: RE: The Other Mars Meteorite - Lafayette
Meteorite

Ron!

Found it:

Jull, A.J.T., Eastoe, C.J., and Clout, S.:1997,
‘Terrestrial Age of the Lafayette Meteorite and
Stable-isotopic Composition of Weathering Products’,
Proc. 28th Lun. Planet. Sci., 685–686.

Here is the URL:

http://www.lpi.usra.edu/meetings/lpsc97/pdf/1581.PDF

Bob V.


-----Original Message-----
From: Ron Baalke [mailto:baalke at zagami.jpl.nasa.gov] 
Sent: Wednesday, September 15, 2004 11:00 AM
To: robert.verish at jpl.nasa.gov
Subject: The Other Mars Meteorite - Lafayette
Meteorite

http://www.astrobio.net/news/modules.php?op=modload&name=News&file=article&sid=1197

The Other Mars Meteorite
Astrobiology Magazine
September 15, 2004

++++++++++++++++

The timeline proposed
for Lafayette showed a lineage that began around 700
million years ago on Mars, when some saline began to
seep into it and change the rock's mineral content.
About 11 million years ago, the fragment blasted off
of Mars as debris and then landed on Earth [originally
in Illinois] about 2,900 years ago. 
Or put another way, Lafayette arrived relatively
recently on Earth, sometime after the Egyptian
pyramids were completed.

++++++++++++++++