AW: Re-2: [meteorite-list] Moss Meteorite From A Comet?

From: E.P. Grondine <epgrondine_at_meteoritecentral.com>
Date: Mon Aug 21 10:21:38 2006
Message-ID: <20060821142133.28839.qmail_at_web36902.mail.mud.yahoo.com>

Hi Martin,

That's news to me. I don't have the URL at hand to
give you for the initial study, but the isotopic
evidence the U Wurzburg team presented then was pretty
good.

I have not seen any refutations yet - I may have
missed them. Do you have a URL handy for them?

good hunting,
Ed

--- Martin Altmann <altmann_at_meteorite-martin.de>
wrote:

> Hi Ed,
>
> not to dissapoint you,
> but since decades the Chiemgau-impact is brought up
> again and again,
> though until now not a sinlge scientific relevant
> proof was found or
> delivered, neither for the presumed impact pits and
> craters,
> nor for the recovered samples, which turned out to
> be terrestrial.
>
> Best!
> Martin
>
> -----Urspr?ngliche Nachricht-----
> Von: meteorite-list-bounces_at_meteoritecentral.com
> [mailto:meteorite-list-bounces_at_meteoritecentral.com]
> Im Auftrag von E.P.
> Grondine
> Gesendet: Montag, 21. August 2006 15:53
> An: meteorite-list_at_meteoritecentral.com
> Betreff: Re: Re-2: [meteorite-list] Moss Meteorite
> From A Comet?
>
> Hi Larry, List -
>
> It appears we have at least one other comet sample:
> Cheimgau.
>
> good hunting,
> Ed
>
>
> --- Larry Lebofsky <lebofsky_at_lpl.arizona.edu> wrote:
>
> > Hi all:
> >
> > Defending Tim Swindle and Humberto Campins. I have
> > known them for years and
> > they are very conservative scientists. Their work
> is
> > good and they are well-
> > respected scientists. They do not go off (too
> often)
> > to make wild,
> > unsubstantiated, claims., hence, the conclusions
> in
> > their article. They based
> > their Meteorite paper (and their original
> scientific
> > paper) on what we know.
> > We have observations of many comets (Campins has
> > done a lot of this), but we
> > have "samples" from only one comet (Halley), are
> > just now studying Stardust
> > material (so too early to say much), and IDPs
> which
> > are thought to be, at
> > least in part, cometary in origin.
> >
> > Clearly, we need multiple samples from multiple
> > comets --- good luck in our
> > lifetime. Therefore you base your "theories" on
> the
> > existing information, not
> > onwhat you hope to have in the future. That is why
> > people propose new missions
> > to comets and asteroids!
> >
> > We know that not all comets are the same based on
> > our observations and where
> > we think they came from. Some of this may be
> because
> > of how many times they
> > have been close to the Sun, some may have to be
> > related to where they came
> > from (Kuiper Belt or Oort cloud), and some may
> have
> > to do with where they were
> > formed (which may not have been where we see them
> > coming from). Clearly, a
> > chunk of a "fresh" comet would look very different
> > from a "dead" comet. Or, as
> > been on this listserv recently, could we tell the
> > difference between a chunk
> > of a comet or a piece of Ceres? I am not sure I
> > would be willing to say
> > anything in print even though I have studied Ceres
> > for years. What, from
> > either, would we expect to make it through the
> > atmosphere?
> >
> > Even if we were to bring back samples from two or
> > three comets, I doubt if
> > anyone I know would be willing to say (with
> respect
> > to the composition of
> > comets) that that was their "final answer." That
> is
> > the nature of science.
> >
> > I really have to stop writing these a 5:00 in the
> > morning, no breakfast and no
> > soffee, but this is the quiet time of the day.
> >
> > Larry
> >
> >
> >
> > Quoting bernd.pauli_at_paulinet.de:
> >
> > > "Comets ... being 'primitive material' ... we
> > would need
> > > to have known multiple samples of multiple
> comets
> > before
> > > we could say for sure."
> > >
> > > Hi Mark and List,
> > >
> > > I couldn't agree more and that's why I felt a
> bit
> > uneasy when I read
> > > Campins' and Swindle's article in this issue of
> > our METEORITE magazine:
> > >
> > > CAMPINS H. and SWINDLE T.D.(2006) Where are the
> > cometary
> > > meteorites? (Meteorite, May 2006, Vol. 12, No.2,
> > pp. 17-19).
> > >
> > > They solely refer repeatedly to Comet Halley and
> > to Halley dust (plus to
> > > cometary IDPs). Many more comets need to be
> > sampled before we can draw
> > > definite conclusions!
> > >
> > > Best,
> > >
> > > Bernd
> > >
> > > ______________________________________________
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> > > Meteorite-list_at_meteoritecentral.com
> > >
> >
>
http://six.pairlist.net/mailman/listinfo/meteorite-list
> > >
> >
> >
> > ______________________________________________
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> >
>
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> >
>
>
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Received on Mon 21 Aug 2006 10:21:33 AM PDT