title: Processing of meteoritic organic materials as a possible analog of early molecular evolution in planetary environments.
abstract: The composition of the Sutter's Mill meteorite insoluble organic material was studied both in toto by solid-state NMR spectroscopy of the powders and by gas chromatography-mass spectrometry analyses of compounds released upon their hydrothermal treatment. Results were compared with those obtained for other meteorites of diverse classifications (Murray, GRA 95229, Murchison, Orgueil, and Tagish Lake) and found to be so far unique in regard to the molecular species released. These include, in addition to O-containing aromatic compounds, complex polyether- and ester-containing alkyl molecules of prebiotic appeal and never detected in meteorites before. The Sutter's Mill fragments we analyzed had likely been altered by heat, and the hydrothermal conditions of the experiments realistically mimic early Earth settings, such as near volcanic activity or impact craters. On this basis, the data suggest a far larger availability of meteoritic organic materials for planetary environments than previously assumed and that molecular evolution on the early Earth could have benefited from accretion of carbonaceous meteorites both directly with soluble compounds and, for a more protracted time, through alteration, processing, and release from their insoluble organic materials.
authors.affiliation: Department of Chemistry and Biochemistry, Arizona State University, Tempe, AZ 85287-1604.
authors.forename: Sandra
authors.initials: S
authors.lastname: Pizzarello
authors.forename: Stephen K
authors.initials: SK
authors.lastname: Davidowski
authors.forename: Gregory P
authors.initials: GP
authors.lastname: Holland
authors.forename: Lynda B
authors.initials: LB
authors.lastname: Williams
keywords: carbonaceous chondrites; extraterrestrial organic materials
references.citation: Science. 2012 Dec 21;338(6114):1583-7
references.pmid: 23258889
references.citation: Proc Natl Acad Sci U S A. 2011 Nov 29;108(48):19171-6
references.pmid: 21464292
references.citation: Science. 1980 Mar 14;207(4436):1202-4
references.pmid: 17776856
references.citation: Proc Natl Acad Sci U S A. 2011 Mar 15;108(11):4303-6
references.pmid: 21368183
references.citation: Nature. 2008 Jul 3;454(7200):37-8
references.pmid: 18596792
references.citation: Science. 1971 Oct 29;174(4008):459-67
references.pmid: 17745729
references.citation: Science. 2001 Sep 21;293(5538):2236-9
references.pmid: 11520948
references.citation: Science. 2005 Sep 16;309(5742):1847-50
references.pmid: 16166515
references.citation: Proc Natl Acad Sci U S A. 2010 Feb 16;107(7):2763-8
references.pmid: 20160129
references.citation: Meteorit Planet Sci. 1998 Jul;33(4):603-22
references.pmid: 11543070
references.citation: Science. 1965 Nov 19;150(3699):1046-8
references.pmid: 17810115
references.citation: Nature. 2001 Jan 11;409(6817):175-8
references.pmid: 11196637
references.citation: Geochim Cosmochim Acta. 2000 Jan;64(2):329-38
references.pmid: 11543420
references.citation: Nature. 2004 Aug 26;430(7003):985-91
references.pmid: 15329712
references.citation: Orig Life Evol Biosph. 2006 Apr;36(2):93-108
references.pmid: 16642268
references.citation: Geochim Cosmochim Acta. 1987;51:299-303
references.pmid: 11542083
references.citation: Nature. 2011 Oct 26;479(7371):80-3
references.pmid: 22031328