The soluble organic compounds of the Bells meteorite: Not a unique or unusual composition

Monroe, A. A.; Pizzarello, Sandra

doi:10.1016/j.gca.2011.09.041

Cited by 44 publications

(65 citation statements)

References 33 publications

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“…C 1 -C 10 monocarboxylic acids were present in Ivuna (CI1) and Bells (CM2) (Monroe and Pizzarello, 2011). For instance, although C 1 and C 2 monocarboxylic acids in Tagish Lake (C2) are only slightly less abundant than in Murchison (CM2), only trace amounts exist beyond C 2 .…”

Section: Short-chain Monocarboxylic Acidsmentioning

confidence: 99%

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Organic Geochemistry of Meteorites

Sephton¹

2014

Treatise on Geochemistry

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Section: Short-chain Monocarboxylic Acidsmentioning

confidence: 99%

“…Hydroxy acids were isolated in an acetic acid eluate of a hot water extract of the Ivuna (CI1) and Bells (CM2) meteorites (Monroe and Pizzarello, 2011). Hydroxy acids are the most abundant compound class in these meteorites and displayed similar distributions in both samples.…”

Section: Hydroxycarboxylic Acidsmentioning

confidence: 99%

Organic Geochemistry of Meteorites

Sephton¹

2014

Treatise on Geochemistry

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“…Studies addressing the quantification of these molecules in an astrochemical context came after analyzing Murchison, Yamato-74662 and Yamato-793321 meteorites by GC-MS (Pering and Ponnamperuma, 1971;Basile et al, 1984;Shimoyama et al, 1989). More recent reports show the abundance of free meteoritic PAHs in Bells, Ivuna and five Antarctic meteorites, however; these results are presented as supplementary information only, lacking isotopic data for discussing their astrobiological significance and extraterrestrial indigeneity (Pizzarello et al, 2008(Pizzarello et al, , 2012Monroe and Pizzarello, 2011). Fig.…”

Section: Molecular Distribution and Abundances Of Polycyclic Aromaticmentioning

confidence: 99%

Hydrogen and carbon isotopic ratios of polycyclic aromatic compounds in two CM2 carbonaceous chondrites and implications for prebiotic organic synthesis

Huang

Aponte

Zhao

et al. 2015

Earth and Planetary Science Letters

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“…Because only α-amino acids can form via Strecker syntheses, the data leave open the question of what alternative syntheses led to these compounds. As for their possible endurance in the meteorite, were they simply more stable and better survivors of alteration phases (e.g., they lack acidic carbons and do not enolize) (36), some would be also found in more pristine meteorites but were not.…”

mentioning

confidence: 99%

Large enantiomeric excesses in primitive meteorites and the diverse effects of water in cosmochemical evolution

Pizzarello

Monroe

Лауретта

2012

Proc. Natl. Acad. Sci. U.S.A.

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131

153

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Carbonaceous chondrites are meteoritic fragments of asteroids that avoided the geological reprocessing of larger planets and allow laboratory probing of early solar-nebula materials. Among these, Renazzo-type (CR) chondrites found in Antarctica appear remarkably pristine and are distinguished by abundant organic materials and water-soluble molecules such as amino acids and ammonia. We present a comprehensive analysis of the organic composition of selected CR meteorites of different petrographic classification and compare compounds' abundance and distribution as they may relate to asteroidal aqueous processing and concomitant evolution of the mineral phases. We found that several CR compounds such as amino acids and sugar alcohols are fully represented in stones with no or minimal water exposure indicating a formation that, if solar, preceded parent body processes. The most pristine CRs also revealed natal enantiomeric excesses (ee) of up to 60%, much larger than ever recorded. However, aqueous alteration appears to affect CR soluble organic composition and abundances, in particular some diastereomeric amino acids may gauge its extent by the consequent racemization of their ee.primitive asteroids | abiotic molecular evolution | solar ices | clays C R meteorites are characterized by several petrologic, geochemical, and isotopic features, such as containing large chondrules, high Fe-Ni metal abundances, and distinct wholerock O-isotopic distributions (1). However, only recent comprehensive analyses of the soluble and insoluble organic materials in two pristine* CR2 † meteorites, GRA 95229 (GRA1) and LAP 02342 (LAP) (2, 3) revealed what is possibly their most distinguishing characteristic vis-à-vis other carbonaceous chondrites (CC) types (i.e., soluble organic suites that are overall unique for having a preponderance of water-over solvent-soluble compounds). Ammonia is the most abundant single molecule detected in CR2 water extracts, and amino acids are their largest component, unlike, for example, in the Murchison meteorite where hydrocarbons are the dominant molecular species.Amino acids have been the most captivating findings in CC meteorites since the fall of Murchison (4) because several of the compounds have exact molecular correspondence with biomolecules and possible pre-biotic significance. In intervening studies, however, the detection of a diverse and apparently stochastic suite of compounds in many meteorites made it difficult to propose how this random mix could have found effective chemical pathways toward the origin of life (5). CR2s have significantly changed that perspective with their main compositional abundances of water-soluble and N-containing molecular species.CC materials relied on a long cosmic history for their formation, which spanned solar as well as presolar environments. In particular, the high D and 13 C isotopic enrichments of some CC organic compounds have revealed their lineage from cold cosmic regimes (6). Among CRs, GRA1 amino acids display δD values up to þ7;200‰ (2), the larges...

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The soluble organic compounds of the Bells meteorite: Not a unique or unusual composition

Cited by 44 publications

References 33 publications

Organic Geochemistry of Meteorites

Organic Geochemistry of Meteorites

Hydrogen and carbon isotopic ratios of polycyclic aromatic compounds in two CM2 carbonaceous chondrites and implications for prebiotic organic synthesis

Large enantiomeric excesses in primitive meteorites and the diverse effects of water in cosmochemical evolution

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