Abundance, sizes, and major element compositions of components in CR and LL chondrites: formation from single reservoirsOPEN ACCESS
Denton S. Ebel, Marina E. Gemma, Samuel P. Alpert, Jasmine Bayron, Ana H. Lobo, Michael K. Weisberg MAPS, Version of Record online: 11 June 2024 LINK PDF (OPEN ACCESS) “Abundances, apparent sizes, and individual chemical…
Tracing the history of an unusual compound presolar grain from progenitor star to asteroid parent body hostOPEN ACCESS
Sheryl A. Singerling, Larry R. Nittler, Jens Barosch, Elena Dobrica, Adrian J. Brearley, Rhonda M. Stroud Accepted for publication in Geochimica et Cosmochimica Acta on January 17, 2023 PDF (OPEN ACCESS) “We conducted a TEM…
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…
Presolar O- and C-anomalous grains in unequilibrated ordinary chondrite matricesOPEN ACCESS
Jens Barosch, Larry R. Nittler, Jianhua Wang, Elena Dobrică, Adrian J. Brearley, Dominik C. Hezel, Conel M. O’D. Alexander Geochimica et Cosmochimica ActaIn Press, Journal Pre-proof, Available online 29 August 2022 LINK PDF (OPEN ACCESS)…
TEM analyses of in situ presolar grains from unequilibrated ordinary chondrite LL3.0 SemarkonaOPEN ACCESS
Sheryl A. Singerling, Larry R. Nittler, Jens Barosch, Elena Dobrica, Adrian J. Brearley, Rhonda M. Stroud Accepted for publication in Geochimica et Cosmochimica Acta on May 5, 2022 PDF (OPEN ACCESS) Update (11 May 2022):…
Processes and temperatures of FGR formation in chondrites
P-M. Zanetta, C. Le Guillou, H. Leroux, B. Zanda, R. Hewins, G. Bellino Geochimica et Cosmochimica ActaAvailable online 19 November 2021 LINK “In order to understand the nature of the dust that accreted onto chondrules…
Mineralogy, petrology, and oxygen‐isotope compositions of magnetite ± fayalite assemblages in CO3, CV3, and LL3 chondrites
Alexander N. Krot, Patricia M. Doyle, Kazuhide Nagashima, Elena Dobrică, Michail I. Petaev Meteoritics & Planetary ScienceFirst Published: 20 October 2021 LINK “We report on the mineralogy, petrology, and O-isotope compositions of magnetite and fayalite…
Sulfur abundances and isotopic compositions in bulk carbonaceous chondrites and insoluble organic material: Clues to elemental and isotopic fractionations of volatile chalcophiles
Conel M.O’D. Alexander, Jonathan G. Wynn, Roxane Bowden Meteoritics & Planetary ScienceVersion of Record online: 26 September 2021 LINK “The bulk S elemental abundances and δ34S values for 83 carbonaceous chondrites (mostly CMs and CRs)…
Evidence from phosphorus X-ray mapping for a multistep process in the formation of olivine phenocrysts in FeO-rich porphyritic chondrules
Alan E. Rubin, Bastian Baecker Meteoritics & Planetary ScienceVersion of Record online: 31 July 2021 LINK “Phosphorus X-ray maps of olivine phenocrysts in many type II (FeO-rich) porphyritic chondrules in LL3.00 Semarkona and CO3.05 Y…
Highly volatile element (H, C, F, Cl, S) abundances and H isotopic compositions in chondrules from carbonaceous and ordinary chondrites
Kei Shimizu, Conel M. O’D. Alexander, Erik H. Hauri, Adam R. Sarafian, Larry R. Nittler, Jianhua Wang, Steven D.Jacobsen, Ruslan A. Mendybaev Geochimica et Cosmochimica ActaIn Press, Journal Pre-proof, Available online 10 March 2021 LINK…
Petrology of the opaque assemblages in unequilibrated ordinary chondrites
Samuel P. Alpert, Denton S. Ebel, Michael K. Weisberg, Jeremy R. Neiman Meteoritics & Planetary ScienceVersion of Record online: 05 February 2021 LINK “Opaque assemblages (OAs) are small (submillimeter) objects composed primarily of metals, sulfides,…
Valence determinations and oxybarometry on FIB‐sectioned olivine and pyroxene using correlated Ti, V, and Cr micro‐XAFS spectroscopy: Evaluation of ion‐milling effects and application to Antarctic micrometeorite grains
S. R. Sutton, A. J. Brearley, E. Dobrică, A. Lanzirotti, M. Newville, O. Tschauner Meteoritics & Planetary ScienceVersion of Record online:15 December 2020 LINK “X‐ray absorption fine structure (XAFS) spectroscopy methods have been applied to…
Amorphous silicates in the matrix of Semarkona: The first evidence for the localized preservation of pristine matrix materials in the most unequilibrated ordinary chondrites
E. Dobrică, A. J. Brearley Meteoritics & Planetary Science LINK “We have investigated the fine‐grained matrix of the least‐altered unequilibrated ordinary chondrite (UOC) Semarkona (LL3.00) using different electron microscope techniques. Unlike previous studies, which found…
Aggregate Growth and Internal structures of Chondrite Parent Bodies Forming from Dense ClumpsOPEN ACCESS
Yuji Matsumoto, Shigeru Wakita, Yasuhiro Hasegawa, Shoichi Oshino accepted for publication in ApJ PDF (OPEN ACCESS) “Major components of chondrites are chondrules and matrix. Measurements of the volatile abundance in Semarkona chondrules suggest that chondrules…
Aqueous Alteration of Porous Microchondrules in Semarkona: Implications for Hydration, Oxidation and Elemental Exchange Processes
E. Dobrică, C. Le Guillou, A.J. Brearley Geochimica et Cosmochimica Acta In Press, Accepted Manuscript, Available online 18 October 2018 LINK “Porous, igneous glassy microchondrules are relatively common in Semarkona and other unequilibrated ordinary chondrites…
Evaluation of petrologic evidence for high partial pressures of SiO(g) in the solar nebula
Alan E. Rubin LINK Meteorit Planet Sci. . doi:10.1111/maps.13180 “Although they cannot be ruled out, high partial pressures of SiO(g) in the solar nebula are not required to produce various petrologic features of chondrules. These…
Magnetic Fields Recorded by Chondrules Formed in Nebular ShocksOPEN ACCESS
Chuhong Mai, Steven J. Desch, Aaron C. Boley, Benjamin P. Weiss accepted for publication in ApJ PDF (OPEN ACCESS) Update (19 April 2018): LINK “Recent laboratory efforts (Fu et al., 2014) have constrained the remanent…
The Life and Death of Iron-60
Trappitsch R. * Boehnke P. Stephan T. Telus M. Savina M. R. Pardo O. Davis A. M. Dauphas N. Huss G. R. 80th Annual Meeting of the Meteoritical Society 2017 [#6299] abstract (PDF) “We measured…
The Bulk Valence State of Fe and the Origin of Water in Chondrites
S. Sutton, C.M.O’D. Alexander, A. Bryant, A. Lanzirotti, M. Newville, E.A. Cloutis Geochimica et Cosmochimica Acta In Press, Accepted Manuscript, Available online 19 May 2017 LINK “There is abundant petrologic evidence for the oxidation of…
Secondary melting events in Semarkona chondrules revealed by compositional zoning in low-Ca pyroxene
Bastian Baecker, Alan E. Rubin, John T. Wasson Geochimica et Cosmochimica Acta In Press, Accepted Manuscript, Available online 17 May 2017 LINK “It is well established that many chondrules contain relict grains formed in previous…
Type-IAB Chondrules in LL3.0 Semarkona: No Need for High Partial Pressures of SiO(g) in the Solar Nebula
A. E. Rubin 48th Lunar and Planetary Science Conference (2017), Abstract #2700 PDF
Multi-scale three-dimensional characterization of iron particles in dusty olivine: Implications for paleomagnetism of chondritic meteoritesOPEN ACCESS
Joshua F.Einsle, Richard J. Harrison, Takeshi Kasama, Pádraig Ó Conbhuí, Karl Fabian, Wyn Williams, Leonie Woodland, Roger R. Fu, Benjamin P. Weiss, Paul A. Midgley American Mineralogist, v. 101, i. 9, p. 2070-2084, First Published…
Forming Chondrites in a Solar Nebula with Magnetically Induced Turbulence
Yasuhiro Hasegawa, Neal J. Turner, Joseph Masiero, Shigeru Wakita, Yuji Matsumoto, Shoichi Oshino Updated (16 March 2016): abstract Yasuhiro Hasegawa et al 2016 ApJ 820 L12 PDF (open access) abstract “Chondritic meteorites provide valuable opportunities…
Correlations and zoning patterns of phosphorus and chromium in olivine from H chondrites and the LL chondrite Semarkona
McCanta, M. C., Beckett, J. R. and Stolper, E. M. Meteoritics & Planetary Science. doi: 10.1111/maps.12604 LINK “Phosphorus zoning is observed in olivines in high-FeO (type IIA) chondrules in H chondrites over the entire range…
Hydrogen Isotopic Evolution of Water and Organic Compounds on Chondritic Asteroids
L. Piani, L. Remusat, F. Robert, H. Yurimoto 47th Lunar and Planetary Science Conference (2016), Abstract #1707 PDF
A Highly Unusual Clast in Semarkona with a Complex Evolutionary History: Further Evidence of the Diversity of Solar Nebula Materials and Processes
E. Dobrica, A. J. Brearley, D. S. Ebel, M. K. Weisberg, K. Ziegler 47th Lunar and Planetary Science Conference (2016), Abstract #2317 PDF
Micro-Inclusions in a Layered Clast in Semarkona
D. S. Ebel, M. K. Weisberg, E. Dobrica, J. N. Bigolski, A. J. Brearley, K. Ziegler 47th Lunar and Planetary Science Conference (2016), Abstract #1779 PDF
CAIs in Semarkona (LL3.0)
R. K. Mishra, J. I. Simon, D. K. Ross, K. K. Marhas 47th Lunar and Planetary Science Conference (2016), Abstract #2750 PDF
Mobility of Iron and Nickel at Low Temperatures: Implications for 60Fe-60Ni Systematics of Chondrules from Unequilibrated Ordinary Chondrites
Myriam Telus, Gary R. Huss, Ryan C. Ogliore, Kazuhide Nagashima, Daryl L. Howard, Matthew G. Newville, Andrew G. Tomkins Geochimica et Cosmochimica Acta In Press, Accepted Manuscript, Available online 1 February 2016 doi:10.1016/j.gca.2015.11.046 LINK “The…
Abundance of 60Fe inferred from nanoSIMS study of QUE 97008 (L3.05) chondrules
Ritesh Kumar Mishra, Kuljeet Kaur Marhas, Sameer Earth and Planetary Science Letters, Volume 436 Available online 11 January 2016 LINK “60Fe–60Ni relative chronometry (t1/2=2.62 Mat1/2=2.62 Ma) studies within silicate phases of two chondrules (Ch1b, Ch5)…
Thermal recalcitrance of the organic D-rich component of ordinary chondrites
L. Remusat, L. Piani, S. Bernard Earth and Planetary Science Letters, Volume 435 Available online 29 December 2015 doi:10.1016/j.epsl.2015.12.009 LINK “Carbonaceous and ordinary chondrites (CCs and OCs) contain insoluble organic matter (IOM) with large D-excess…
Overgrowth Layers on Olivine Phenocrysts in High-FeO Semarkona Chondrules Revealed by P, Fe, and Cr X-Ray Maps: Evidence for Multiple Melting of Chondrules
Rubin A. E. * Baecker B. Wasson J. T. 78th Annual Meeting of the Meteoritical Society (2015), abstract #5033 abstract (PDF)
Overgrowth Layers on Pyroxene in an FeO-Rich Porphyritic Chondrule in CO3.0 Y-81020
Baecker B. Rubin A. E. Wasson J. T. 78th Annual Meeting of the Meteoritical Society (2015), abstract #5082 abstract (PDF)
Many Chondrule Melting Events; Multiple Overgrowths in Chondrules and Recycled Grains; Lightning as Heat Source
Wasson J. T. Baecker B. Rubin A. E. 78th Annual Meeting of the Meteoritical Society (2015), abstract #5145 abstract (PDF)
Low 60Fe abundance in Semarkona and Sahara 99555
Haolan Tang, Nicolas Dauphas The Astrophysical Journal, in press. arXiv:1502.05611 PDF LINK (full text) LINK
Trace element geochemistry of ordinary chondrite chondrules: the type I/type II chondrule dichotomy
Emmanuel Jacquet, Olivier Alard, Matthieu Gounelle Geochimica et Cosmochimica Acta available online 14 February 2015 doi:10.1016/j.gca.2015.02.005 LINK
Micron-scale D/H heterogeneity in chondrite matrices: a signature of the pristine solar system water?
Laurette Piani, François Robert, Laurent Remusat Earth and Planetary Science Letters Volume 415, 1 April 2015, Pages 154–164 arXiv:1502.01067 doi:10.1016/j.epsl.2015.01.039 PDF LINK LINK LINK
Primary Feldspar in Semarkona (LL3.00) Chondrules
J. A. Lewis, R. H. Jones 46th Lunar and Planetary Science Conference (2015), Abstract #2067 PDF LINK
Semarkona: Constraining Chondrule and Chondrite Formation
A. Hubbard, D. S. Ebel 46th Lunar and Planetary Science Conference (2015), Abstract #2695 PDF LINK
Fine-Grained Rims and Matrix in Unequilibrated Ordinary Chondrites: A Comparative Study of Northwest Africa 5717 (Ung. 3.05) and Semarkona (LL3.00)
J. N. Bigolski, M. E. Zolensky, R. Christoffersen, M. K. Weisberg, Z. Rahman 46th Lunar and Planetary Science Conference (2015), Abstract #2126 PDF LINK
Widespread evidence for high-temperature formation of pentlandite in chondrites
Devin Schrader (SI), Tim McCoy (SI), Jemma Davidson (CIW) PDF LINK
Solar nebula magnetic fields recorded in the Semarkona meteorite
Roger R. Fu, Benjamin P. Weiss, Eduardo A. Lima, Richard J. Harrison, Xue-Ning Bai, Steven J. Desch, Denton S. Ebel, Clement Suavet, Huapei Wang, David Glenn, David Le Sage, Takeshi Kasama, Ronald L. Walsworth, Aaron…
Semarkona: Lessons for chondrule and chondrite formation
Alexander Hubbard, Denton S. Ebel PDF LINK LINK update (22 September): LINK We consider the evidence presented by the LL3.0 chondrite Semarkona, including its chondrule fraction, chondrule size distribution and matrix thermal history. We show…
Fossil records of high level of 60Fe in chondrules from unequilibrated chondrites
Mishra R.K. and Chaussidon M. Earth and Planetary Science Letters Volume 398, 15 July 2014, Pages 90–100 LINK
Fe-Ni and Al-Mg isotope records in UOC chondrules: Plausible stellar source of 60Fe and other short-lived nuclides in the early Solar System
Mishra RK and Goswami JN (in press) Geochimica et Cosmochimica Acta Volume 132, 1 May 2014, Pages 440–457 LINK Model stellar nucleosynthesis yields suggest that both a high mass (5–6.5 M⊙) Asymptotic Giant Branch (AGB)…
