[meteorite-list] Murchison vs. other CM's

[mexicodoug at aim.com]

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 <fuzzfoot at comcast.net>
To: 'JASON PHILLIPS' <jnbran at verizon.net>; 'Meteorite Mailing List' 
<meteorite-list at 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: meteorite-list-bounces at meteoritecentral.com
[mailto:meteorite-list-bounces at meteoritecentral.com] 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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