[meteorite-list] First Mars ID

From: Treiman, Allan <Treiman_at_meteoritecentral.com>
Date: Thu Apr 22 09:55:44 2004
Message-ID: <9CBE44BF7DE9D511960300500424D7D0111F4C_at_cassnt2>

  Actually, Papanastassiou and Wasserburg in 1974 interpreted the
young age of Nakhla as being metamorphism, not an igneous age.

  There were suggestions in print that the SNCs were from Mars at least
as early as 1979.
        Wasson J. and Wetherill G., 1979, Dynamical, chemica, and isotopic
    evidence regarding the formation locations of asteroids and meteorites,
    926-974 in Asteroids (ed. T. Gehrels) U. Az. Press.
        McSween H.Y.Jr., et al. (1979) Petrogenetic relationships between
    Allan Hills 77005 and other achondrites. Earth Planet. Sci. Lett. 45,
    275-284.

   Probably Arch Reid and Ted Bunch talked about it privately in 1974,
reading
between the lines of their 1975 paper The Nakhlites Part II: Where, when,
and how. Meteoritics 10, 317-324. "We conclude that the ... Nakhla parent
body ... is unlikely to be that of the more common chondrites or
achondrites,
and it apparently, in some respects, resembles the Earth."
  
  Of course, Bogard and Johnson in 1983 found the smoking gun to link the
SNCs
and Mars.

 Allan


Allan H. Treiman
Lunar and Planetary Institute
3600 Bay Area Boulevard
Houston TX 77058-1113
   281-486-2117
   281-486-2162 FAX
  treiman_at_lpi.usra.edu


-----Original Message-----
From: Ron Baalke [mailto:baalke_at_zagami.jpl.nasa.gov]
Sent: Thursday, January 10, 2002 3:43 PM
To: meteorite-list_at_meteoritecentral.com
Subject: Re: [meteorite-list] First Mars ID


>
> That would be-
>
> McSween.H.Y., Jr (1984) SNC Meteorites: Are they martian rocks?
> Geology 12, 3-6
>

1984? That seems a little late, I think the first paper was in 1974
by Papanastassiou and Wasserburg when they dated Nahkla at 1.3 billion
years, which ruled out the asteroids as the parent body. Other pre-1984
papers
include:

Ashwal, L. D.; Warner, J. L.; and Wood, C. A. "SNC Meteorites: Evidence
Against an Asteroidal Origin." Proc. Thirteenth Lunar and Planetary Science
Conference, Part I. J. Geophys. Res. Sup. 87, A393-A400, 1982.
                               
Bogard, D. D. and Johnson, P. "Martian Gases in an Antarctic Meteorite?"
Science 221, 651-654, 1983.

Papanastassiou, D. A. and Wasserburg, G. J. "Evidence for the Late Formation
and Young Metamorphism in the Achondrite Nakhla." Geophys. Res. Let. 1,
23-26, 1974.

Wood, C. A. and Ashwal, L. D. "SNC Meteorites: Igneous Rocks from Mars?"
Proc. Lunar Pl. Sci. 12B, 1359-1375, 1981.

Ron Baalke

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Received on Thu 10 Jan 2002 06:10:09 PM PST