[meteorite-list] Murchison vs. other CM's
From: mexicodoug at aim.com <mexicodoug_at_meteoritecentral.com>
Date: Wed, 18 Jun 2008 01:46:28 -0400 Message-ID: <8CA9F1DC9727925-18C-3319_at_webmail-de19.sysops.aol.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 ______________________________________________ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list at meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list ______________________________________________ http://www.meteoritecentral.com Meteorite-list mailing list Meteorite-list at meteoritecentral.com http://six.pairlist.net/mailman/listinfo/meteorite-list Received on Wed 18 Jun 2008 01:46:28 AM PDT |
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