Journal ArticleDOI
The origin and evolution of chondrites recorded in the elemental and isotopic compositions of their macromolecular organic matter
TLDR
In a survey of the elemental and isotopic compositions of insoluble organic matter (IOM) from 75 carbonaceous, ordinary and enstatite chondrites, this article found dramatic variations within and between chondrite classes.About:
This article is published in Geochimica et Cosmochimica Acta.The article was published on 2007-09-01. It has received 496 citations till now. The article focuses on the topics: Chondrite & Chondrule.read more
Citations
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The Provenances of Asteroids, and Their Contributions to the Volatile Inventories of the Terrestrial Planets
Conel M. O'd. Alexander,R. Bowden,Marilyn L. Fogel,Kieren T. Howard,Kieren T. Howard,Christopher D. K. Herd,Larry R. Nittler +6 more
TL;DR: Hydrogen isotopic analysis of primitive meteorites implicates asteroids as early sources of Earth’s water and argues against an influx of water ice from the outer solar system, which has been invoked to explain the nonsolar oxygen isotopic composition of the inner solar system.
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High molecular diversity of extraterrestrial organic matter in Murchison meteorite revealed 40 years after its fall
Philippe Schmitt-Kopplin,Zelimir Gabelica,Régis D. Gougeon,Agnes Fekete,Basem Kanawati,Mourad Harir,Istvan Gebefuegi,Gerhard Eckel,Norbert Hertkorn +8 more
TL;DR: It is demonstrated that a nontargeted ultrahigh-resolution molecular analysis of the solvent-accessible organic fraction of Murchison extracted under mild conditions allows one to extend its indigenous chemical diversity to tens of thousands of different molecular compositions and likely millions of diverse structures.
Journal ArticleDOI
Cassini finds molecular hydrogen in the Enceladus plume: Evidence for hydrothermal processes.
J. Hunter Waite,Christopher R. Glein,Rebecca Perryman,Ben Teolis,Brian Magee,Greg Miller,J. Grimes,Mark E. Perry,Kelly E. Miller,Alexis Bouquet,Jonathan I. Lunine,Tim Brockwell,Scott Bolton +12 more
TL;DR: The Ion Neutral Mass Spectrometer onboard the Cassini spacecraft is used to detect molecular hydrogen in the plume of escaping material on Enceladus, finding that the most plausible source of this hydrogen is ongoing hydrothermal reactions of rock containing reduced minerals and organic materials.
Journal ArticleDOI
Our astrochemical heritage
Paola Caselli,Cecilia Ceccarelli +1 more
TL;DR: In this article, a review of the formation process of Sun-like stars in the early days of the solar system is presented, showing that three major steps are involved before the planet-formation period.
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Enrichment of the amino acid L-isovaline by aqueous alteration on CI and CM meteorite parent bodies.
TL;DR: The large asymmetry in isovaline and other α-dialkyl amino acids found in altered CI and CM meteorites suggests that amino acids delivered by asteroids, comets, and their fragments would have biased the Earth's prebiotic organic inventory with left-handed molecules before the origin of life.
References
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Journal ArticleDOI
Geochimica et Cosmochimica Acta. "The carbon isotope biogeochemistry of acetate from methanogenic marine sediment." by N. E. Blair and W. D. Carter Jr. published in 56, 1247-1258
Journal ArticleDOI
Lead Isotopic Ages of Chondrules and Calcium-Aluminum-Rich Inclusions
TL;DR: The lead-lead isochron age of chondrules in the CR chondrite Acfer 059 is 4564.7 ± 0.6 million years ago, which indicates that CAI- and chondrule-forming events lasted for at least 1.3 My and supports the chronological significance of the 26Al-26Mg systematics.
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Oxygen isotope studies of carbonaceous chondrites
TL;DR: In this paper, a comprehensive set of whole-rock analyses of CV, CO, CK, CM, CR, CH, and CI chondrites is presented, as well as selected components of some of these meteorites.
Journal ArticleDOI
Organics captured from comet 81P/Wild 2 by the Stardust spacecraft.
Scott A. Sandford,Jérôme Aléon,Conel M. O'd. Alexander,Tohru Araki,Sašaǎ Bajt,G. A. Baratta,Janet Borg,John P. Bradley,Donald E. Brownlee,John Robert Brucato,Mark J. Burchell,Henner Busemann,Anna L. Butterworth,Simon J. Clemett,George D. Cody,Luigi Colangeli,George Cooper,Louis Le Sergeant d'Hendecourt,Zahia Djouadi,Jason P. Dworkin,G. Ferrini,Holger Fleckenstein,George J. Flynn,Ian A. Franchi,Marc Fries,Mary K. Gilles,Daniel P. Glavin,Matthieu Gounelle,F. Grossemy,Chris Jacobsen,Lindsay P. Keller,A. L. David Kilcoyne,Jan Leitner,Graciela Matrajt,Anders Meibom,Vito Mennella,Smail Mostefaoui,Larry R. Nittler,Maria Elisabetta Palumbo,D. A. Papanastassiou,François Robert,Alessandra Rotundi,Christopher J. Snead,Maegan K. Spencer,Frank J. Stadermann,Andrew Steele,Thomas Stephan,Peter Tsou,Tolek Tyliszczak,Andrew J. Westphal,Sue Wirick,Brigitte Wopenka,Hikaru Yabuta,Richard N. Zare,Michael E. Zolensky +54 more
TL;DR: The presence of deuterium and nitrogen-15 excesses suggest that some organics have an interstellar/protostellar heritage and a diverse suite of organic compounds is present and identifiable within the returned samples.
Journal ArticleDOI
The organic component in dust from comet Halley as measured by the PUMA mass spectrometer on board Vega 1
Jochen Kissel,F. R. Krueger +1 more
TL;DR: In this paper, the composition of cometary dust has been analyzed by mass spectroscopy, showing that most particles consist of a predominantly chondritic core with an organic mantle composed mainly of highly unsaturated compounds.