Fw: [meteorite-list] SNC varification

From: Gerald Flaherty <grf2_at_meteoritecentral.com>
Date: Mon Jun 20 22:06:40 2005
Message-ID: <022a01c57605$d73d4cc0$2f01a8c0_at_Dell>

Bernd,Darren and List, some how this reply never arrived. Thanks Darren for
forwarding and Bernd replying. Thanks for helping me with some answers and
even more for the great source, McSween!! I should have known. Even having
read him more than once, I'm impelled to try again. This time with more
retention!
Jerry Flaherty
----- Original Message -----
From: "Darren Garrison" <cynapse_at_charter.net>
To: "Gerald Flaherty" <grf2_at_verizon.net>
Sent: Monday, June 20, 2005 8:27 PM
Subject: Re: [meteorite-list] SNC varification


On Mon, 20 Jun 2005 19:16:41 -0400, "Gerald Flaherty" <grf2_at_verizon.net>
wrote:

>Aye!! Jerry Flaherty PS anyone want to answer my initial question?

Did you miss this one?

To: grf2_at_verizon.net, Meteorite-list@meteoritecentral.com
Subject: Re: [meteorite-list] SNC varification
From: bernd.pauli_at_paulinet.de
Date: 20 Jun 2005 14:43:42 UT
Cc:

> can some one help me out on the third [and more if available]
> verification process to authenticate Martian meteorites:

1. identical match of gases with Martian atmosphere.
2. relatively [1.3 billion*] young crystallization age.
3. ??

* various radiognic isotope systems define ages variying between
  1.3 billion and 0.2 billion years. (McSween, Parent Planets, p. 136)


Hello Jerry and List,

Maybe this helps:

McSWEEN H.Y., Jr. (1994) What we have learned about Mars from
SNC meteorites (Invited Review in Meteoritics 29-6, 1994 November,
pp. 757-779) -Are they really from Mars?, pp. 761-762:

In summary, the idea that SNC meteorites are martian rocks rests
on a number of well-founded observations. The suggestion that late
crystallization requires a large planet remains a durable argument,
even though other thermal sources (e.g., tidal heating of Io) have
now been recognized.

A planetary origin inferred from the presence of garnet in the SNC
source regions is model-dependent but plausible.

A specific link to Mars based on the elemental and isotopic match
between trapped gases and the martian atmosphere remains convinc-
ing.

Other permissive evidence - meteorite data that are consistent with what
we know about Mars from other sources (Ashwal et al., 1982; McSween,
1984) - also strongly support this hypothesis, although these constitute
circular arguments.

If the SNC meteorites are not from Mars, but rather from an asteroid, then
our understanding of small bodies is fundamentally flawed.

-.-.-.-.-.-..-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.

Best regards,

Bernd

To: grf2_at_verizon.net
    Meteorite-list_at_meteoritecentral.com

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Received on Mon 20 Jun 2005 10:06:30 PM PDT