Submicron-sized anhydrous crystalline silicates and their relation to amorphous silicate in the matrix of Acfer 094
Hugues Leroux, Pierre-Marie Zanetta, Corentin Le Guillou, Maya Marinova Geochimica et Cosmochimica ActaIn Press, Journal Pre-proof, Available online 30 November 2024 LINK “The study of pristine chondrites provides insight into nebular processes that occurred prior…
Complex irradiation history of chondrules and matrix – A study of CR2 and some other meteorites
Uta Beyersdorf-Kuis, Ulrich Ott, Mario Trieloff Geochimica et Cosmochimica ActaAvailable online 14 September 2024 LINK “Excesses of cosmic-ray produced nuclei in individual components of meteorites indicate “pre-irradiation”, either in the surface region of their parent…
The grain size distribution of matrix in primitive chondritesOPEN ACCESS
E. Vaccaro, P. Wozniakiewicz, I. A. Franchi, N. Starkey, S. S. Russell MAPSVersion of Record online: 10 April 2023 LINK (OPEN ACCESS)PDF (OPEN ACCESS) “The matrix of primitive chondrites is composed of submicron crystals embedded…
Sulfuric acid as a corrosive cryofluid and oxygen isotope reservoir in planetesimals
Akihiko Hashimoto, Yuki Nakano IcarusIn Press, Journal Pre-proof, Available online 25 March 2023 LINK “The Earth-Moon and other planetary objects are enriched in the heavier isotopes, 17O and 18O, relative to 16O by several %,…
Detection Of Incipient Aqueous Alteration In Carbonaceous ChondritesOPEN ACCESS
L. Krämer Ruggiu, B. Devouard, J. Gattacceca, L. Bonal, H. Leroux, J. Eschrig, D. Borschneck, A.J. King, P. Beck, Y. Marrocchi, V. Debaille, R.D. Hanna, O. Grauby Geochimica et Cosmochimica ActaIn Press, Journal Pre-proof, Available…
SIMS matrix effects in oxygen isotope analysis of olivine and pyroxene: Application to Acfer 094 chondrite chondrules and reconsideration of the primitive chondrule minerals (PCM) line
Mingming Zhang, Kohei Fukuda, Michael J. Spicuzza, Guillaume Siron, Adriana Heimann, Alex J. Hammerstromb, Noriko T.Kita, Takayuki Ushikubo, John W.Valley Chemical GeologyIn Press, Journal Pre-proof, Available online 11 July 2022 LINK “The instrumental bias (here…
Three-dimensional microstructure and mineralogy of a cosmic symplectite in the Acfer 094 carbonaceous chondrite: Implication for its origin
Megumi Matsumoto, Akira Tsuchiyama, Akira Miyake, Motoo Ito, Junya Matsuno, Kentaro Uesugi, Akihisa Takeuchi, Yu Kodama, Masahiro Yasutake, Epifanio Vaccaro Geochimica et Cosmochimica ActaIn Press, Journal Pre-proof, Available online 28 February 2022 LINK “Cosmic symplectites…
Mineralogy of fine-grained matrix, fine-grained rim, chondrule rim, and altered mesostasis of a chondrule in Asuka 12169, one of the least altered CM chondrites
Takaaki Noguchi, Masahiro Yasutake, Akira Tsuchiyama, Akira Miyake, Makoto Kimura, Akira Yamaguchi, Naoya Imae, Kentaro Uesugi, Akihisa Takeuchi Polar ScienceAvailable online 3 July 2021 LINK “Mineralogy of fine-grained matrix (FGM), fine-grained rim (FGR), chondrule rim,…
Cosmic symplectite recorded irradiation by nearby massive stars in the solar system’s parent molecular cloud
Lionel G. Vacher, Ryan C. Ogliore, Clive Jones, Nan Liu, David A. Fike Geochimica et Cosmochimica ActaIn Press, Journal Pre-proof, Available online 25 June 2021 LINK “The Sun’s astrophysical birth environment affected the formation and…
Testing models for the composition of chondrites and their components: I. CO chondrites
Andrea Patzer, Emma S. Bullock, Conel M. O’D.Alexander Geochimica et Cosmochimica ActaIn Press, Journal Pre-proof, Available online 16 April 2021 LINK “We present the first results of a comprehensive investigation aimed at testing the hypothesis…
Oxygen isotopic heterogeneity in the early Solar System inherited from the protosolar molecular cloudOPEN ACCESS
Alexander N. Krot, Kazuhide Nagashima, James R. Lyons, Jeong-Eun Lee, Martin Bizzarro Science Advances 16 Oct 2020:Vol. 6, no. 42, eaay2724DOI: 10.1126/sciadv.aay2724 LINK (OPEN ACCESS)PDF (OPEN ACCESS) “The Sun is 16O-enriched (Δ17O = −28.4 ±…
Discovery of fossil asteroidal ice in primitive meteorite Acfer 094OPEN ACCESS
Megumi Matsumoto, Akira Tsuchiyama, Aiko Nakato, Junya Matsuno, Akira Miyake, Akimasa Kataoka, Motoo Ito, Naotaka Tomioka, Yu Kodama, Kentaro Uesugi, Akihisa Takeuchi, Tsukasa Nakano and Epifanio Vaccaro Science Advances 20 Nov 2019: Vol. 5, no….
MINERALOGY, PETROGRAPHY, AND OXYGEN ISOTOPIC COMPOSITIONS OF ULTRAREFRACTORY INCLUSIONS FROM CARBONACEOUS CHONDRITES
A.N. Krot, C. Ma, K. Nagashima, A.M. Davis, J.R. Beckett, S.B. Simon, M. Komatsu, T.J. Fagan, F. Brenker, M.A. Ivanova, A.Bischoff Geochemistry Available online 15 August 2019 LINK “We report on the mineralogy, petrography, and…
The 26Al-26Mg systematics of FeO-rich chondrules from Acfer 094: two chondrule generations distinct in age and oxygen isotope ratios
Andreas T. Hertwig, Kimura Makoto, Takayuki Ushikubo, Céline Defouilloy, Noriko T. Kita Geochimica et Cosmochimica Acta In Press, Accepted Manuscript, Available online 16 February 2019 LINK “The 26Al-26Mg ages of FeO-rich (type II) chondrules from…
Spectral Classification of Ungrouped Carbonaceous Chondrites II: Parameters and Comparison to Independent Measures
V. E. Hamilton, N. M. Abreu, P. A. Bland, H. C. Connolly Jr., R. D. Hanna, D. S. Lauretta, D. L. Schrader 49th Lunar and Planetary Science Conference (2018), Abstract #1753 abstract
Sulfide–oxide assemblages in Acfer 094—Clues to nebular metal–gas interactions
Barth, M. I. F., Harries, D., Langenhorst, F. and Hoppe, P. Meteoritics & Planetary Science. doi: 10.1111/maps.12992 LINK “The ungrouped carbonaceous chondrite Acfer 094 is among the least altered samples of the early solar system….
Chemical composition and iron oxidation state of amorphous matrix silicates in the carbonaceous chondrite Acfer 094.
Meteoritics & Planetary Science. doi: 10.1111/maps.12991 Hopp, T. and Vollmer, C. LINK “Nanoscale amorphous silicates are a major component in primitive carbonaceous chondrite matrices and anhydrous interplanetary dust particles. Owing to their metastability and sensitive…
Coordinated mineralogical and isotopic analyses of a cosmic symplectite discovered in a comet 81P/Wild 2 sample.
Nguyen, A. N., Berger, E. L., Nakamura-Messenger, K., Messenger, S. and Keller, L. P. Meteoritics & Planetary Science. doi: 10.1111/maps.12905 LINK “We have discovered in a Stardust mission terminal particle a unique mineralogical assemblage of…
From Presolar to Solar Silicates: Resolving the Ancestry of Silicates in Primitive Solids
K. L. Villalon, C. Floss, T. Stephan, R. Trappitsch, I. Koch, L. Kӧӧp, A. M. Davis 48th Lunar and Planetary Science Conference (2017), Abstract #3029 PDF
Evidence for a Long Duration of the 16O-Rich Reservoir in the Solar Nebula
Ushikubo T. * Tenner T. J. Hiyagon H. Kita N. T. 79th Annual Meeting of the Meteoritical Society (2016) #6080 LINK
Iron Oxidation States of Matrix in Carbonaceous Chondrites Acfer 094 and MIL 07687
Vaccaro E. King A. J. Schofield P. F. Abyaneh M. K. Kaulich B. Russell S. S. 79th Annual Meeting of the Meteoritical Society (2016) #6473 LINK
Mineralogy of Presolar Silicate and Oxide Grains of Diverse Stellar Origins
Ann N. Nguyen, Lindsay P. Keller, and Scott Messenger Astrophysical Journal, Volume 818, Number 1 LINK “We report the chemical and structural analysis of nine presolar silicate grains and one presolar oxide grain from the…
New Constraints on the Abundances of Silicate and Oxide Stardust from Supernovae in the Acfer 094 Meteorite
Peter Hoppe, Jan Leitner, and János Kodolányi ApJ 808 L9. doi:10.1088/2041-8205/808/1/L9 LINK
Iron isotopic measurements in presolar silicate and oxide grains from the Acfer 094 ungrouped carbonaceous chondrite
Wei Jia Ong and Christine Floss Meteoritics & Planetary Science doi: 10.1111/maps.12475 LINK
The Closely Linked Timing of Chondrule and Chondrite Formation
Alexander C. M. O’D. 78th Annual Meeting of the Meteoritical Society (2015), abstract #5369 abstract (PDF)
Why Do U-Pb Ages of Chondrules and CAIs Have More Spread than Their 26 Al Ages?
Kita N. T. * Tenner T. J. Ushikubo T. Bouvier A. Wadhwa M. Bullock E. S. MacPherson G. J. 78th Annual Meeting of the Meteoritical Society (2015), abstract #5360 abstract (PDF)
Grain Size Distribution in the Matrix of Primitive Meteorites
Vaccaro E. Wozniakiewicz P. J. Starkey N. A. Franchi I. A. Russell S. S. 78th Annual Meeting of the Meteoritical Society (2015), abstract #5258 abstract (PDF)
Microstructural Characteristics of Polycrystalline Sulfide-Assemblages in Acfer 094
M. I. F. Barth, D. Harries and F. Langenhorst 78th Annual Meeting of the Meteoritical Society (2015) Berkeley, USA July 27-31 2015 PDF (abstract)
Refractory inclusions in the pristine carbonaceous chondrites DOM 08004 and DOM 08006
Simon, S. B. and Grossman, L. (2015) Meteoritics & Planetary Science. doi: 10.1111/maps.12452 LINK The Antarctic carbonaceous chondrites DOM 08004 and DOM 08006 have been paired and classified as CO3.0s. There is some uncertainty as…
A Search for Cosmic Symplectite in the Acfer 094 and Miller Range 07687 Meteorites
L. R. Nittler, J. Davidson, N. Liu, C. M. O’D. Alexander, R. M. Stroud 46th Lunar and Planetary Science Conference (2015), Abstract #2097 PDF LINK
Chemical Composition and Iron Oxidation State of the Amorphous Silicate Matrix in Acfer 094
T. Hopp, C. Vollmer, D. Lautenschläger, M. Pelka, J. Render 46th Lunar and Planetary Science Conference (2015), Abstract #1172 PDF LINK
