Hi Jason and Mike and CM2 fans,
...and a good example is the Murray CM2 (Kentucky, USA, fall, 1950)
meteorite which has many non-canonical amino acids similar to the
composition of Murchison. The amino acids occur in the parts per
million concentration ranges, and destructive analysis for small
samples where volatiles are still retained severely restricts
analytical research due to availability. Murchison, thankfully
provided a windfall of material and is the most accessible to be
studied. Undoubtable other examples in the scientific community from
the cold Antarctic are preserved reasonably and could be analyzed as
well. Only 14 fresh falls of CM2's have occurred in the last couple of
centuries, not giving too much material to go around. Though in the
past 50 years analytical techniques have become more sensitive, looking
for larger molecules in those concentrations in what is left from their
virgin cores is probably still very tricky.
Using the magic USGS/MetSoc database as a reference, here they all are
with the TKW's and the percent each fall represents of the total TKW's
of CM2 falls.
Murchison 100.00 75.1%
Murray 12.60 9.5%
Mighei 8.00 6.0%
Cold Bokkeveld 5.20 3.9%
Nogoya 4.00 3.0%
Boriskino 1.34 1.0%
Banten 0.63 0.5%
Sayama 0.43 0.3%
Haripura 0.32 0.2%
Pollen 0.25 0.2%
Erakot 0.11 0.1%
Nawapali 0.11 0.1%
Crescent 0.08 0.1%
Santa Cruz 0.06 0.0%
No wonder we have info on Murchison and Murray ...
Best wishes,
Doug
-----Original Message-----
From: Mike Bandli <[EMAIL PROTECTED]>
To: 'JASON PHILLIPS' <[EMAIL PROTECTED]>; 'Meteorite Mailing List'
<meteorite-list@meteoritecentral.com>
Sent: Wed, 18 Jun 2008 12:19 am
Subject: Re: [meteorite-list] Murchison vs. other CM's
Most of the CM falls have been shown to contain extraterrestrial amino
acids. Orgueil and Ivuna also contain extraterrestrial amino acids, but
the
CM's contain the widest variety and most complex forms.
Cheers,
Mike Bandli
www.Astro-Artifacts.com
IMCA #5765
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of JASON
PHILLIPS
Sent: Tuesday, June 17, 2008 9:10 PM
To: 'Meteorite Mailing List'
Subject: [meteorite-list] Murchison vs. other CM's
Hello List,
Is Murchison the only CM to contain amino acids that are not found on
earth?
Take Care,
Jason
Rocks from Heaven
www.rocksfromheaven.com
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