[meteorite-list] Tagish Lake Meteorite 'A Gem'

From: Mike Groetz <mpg444_at_meteoritecentral.com>
Date: Thu Apr 22 10:00:09 2004
Message-ID: <20020724015009.43671.qmail_at_web14707.mail.yahoo.com>

Everyone-
   If you would like a piece of Tagish Lake- jump on
Eric's offer. I got mine nearly a year ago from Eric
and he really did me well. The piece is large relative
to the weight as he said and still one of my favorite
specimens.
   Have a good evening.
Mike G.
 
--- Eric Twelker <twelker_at_alaska.net> wrote:
> We still have quite a few pieces of Tagish Lake from
> 60 mg on down. Because
> of the low density, they are big (well, big in a
> small way) for their
> weight. Let us know if you are interested.
>
> Eric Twelker
> twelker_at_alaska.net
> http://www.meteoritemarket.com
>
> > From: Ron Baalke <baalke_at_zagami.jpl.nasa.gov>
> > Date: Mon, 22 Jul 2002 09:55:07 -0700 (PDT)
> > To: meteorite-list_at_meteoritecentral.com (Meteorite
> Mailing List)
> > Subject: [meteorite-list] Tagish Lake Meteorite 'A
> Gem'
> >
> >
> >
> >
>
http://news.bbc.co.uk/hi/english/sci/tech/newsid_2144000/2144150.stm
> >
> > Rare space rock 'a gem'
> > By Helen Briggs
> > BBC News
> > July 22, 2002
> >
> > British scientists have confirmed that one of the
> rarest meteorites ever to
> > fall to Earth is from a time when the Solar System
> was born.
> >
> > It provides a glimpse of a period, 4.5 billion
> years ago, when the planets
> > were beginning to form.
> >
> > The chunk of space rock is higher in
> extra-terrestrial material than any
> > other meteorite and may belong in a class of its
> own, say researchers at
> > London's Natural History Museum.
> >
> > A team led by Dr Sara Russell is one of a handful
> around the world that is
> > analysing slivers of the rock.
> >
> > It came down over Tagish Lake, a remote area of
> northern Canada, on 18
> > January, 2000.
> >
> > Fragments landed on a frozen lake and were
> preserved in ice almost
> > immediately.
> >
> > By a stroke of luck, they were found by someone
> who knew to keep them cold
> > and not to touch them.
> >
> > "It turns out that this meteorite is a really
> unique sample," says Dr
> > Russell. "It's higher in extra-terrestrial organic
> material than any other
> > meteorite."
> >
> > Building blocks
> >
> > Research at the museum has confirmed that the
> Tagish meteorite is "extremely
> > primitive" in its chemical composition.
> >
> > It has changed little since it first arose "in the
> very earliest stages of
> > the Solar System," says Dr Russell.
> >
> > Tiny grains in the rock should reveal new
> information about the dust and
> > gases that came together to make the planets.
> >
> > "Our work on Tagish lake is very much work in
> progress at the moment," Dr
> > Russell told BBC News Online. "What we think we've
> found is that this is a
> > sample of the very earliest building blocks of the
> materials that went on to
> > make up the planets in our Solar System."
> >
> > The sample gives scientists a chance to learn more
> about how the planets
> > formed.
> >
> > It could also reveal whether or not other
> Earth-like planets are likely to
> > be found around other young stars.
> >
> > Space gems
> >
> > The meteorite is from a class known as the
> carbonaceous chondrites.
> >
> > These primitive, carbon-rich space rocks contain
> organic compounds such as
> > amino acids.
> >
> > They also contain tiny jewels in the form of
> pre-solar diamonds and
> > sapphires.
> >
> > These would have been made around the stars that
> were the ancestors of the
> > Sun, and can tell scientists about the processes
> that occur inside stars.
> >
> > Emma Bullock, a postgraduate student in the
> department, is working on the
> > composition of the meteorite for her thesis.
> >
> > "It's unlike any other meteorite we've ever seen
> so it possibly belongs in a
> > group all of its own," she says.
> >
> > "There are [compounds containing the element
> sulphur] in this meteorite that
> > aren't found on Earth and there are also some very
> unusual shapes of
> > sulphide.
> >
> > "It's got some other very interesting features,"
> she adds. "It's been
> > altered by water but not really by heat so that's
> affected some of the
> > minerals."
> >
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> >
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Received on Tue 23 Jul 2002 09:50:09 PM PDT