NWA 11562: A Unique Ureilite with Extreme Mg-rich ConstituentsOPEN ACCESS
Mingbao Li, Ke Zhu, Yan Fan, P. M. Ranjith, Chao Wang, Wen Yu and Shijie Li The Planetary Science Journal, Volume 5, Number 8, Published 22 August 2024 LINK (OPEN ACCESS)PDF (OPEN ACCESS) “A comprehensive…
Symplectite formation in ultramafic achondrites by impact percolation of a sulfide melt
Z. Váci, P.M. Kruttasch, M.J. Krawczynski, R.C. Ogliore, K. Mezger Geochimica et Cosmochimica ActaAvailable online 13 August 2024 LINK “The ungrouped dunitic achondrite Northwest Africa (NWA) 12,217 contains symplectic spinel-pyroxene veins that are mineralogically identical…
Igneous intrusion origin for the petrofabric of Erg Chech 002OPEN ACCESS
C. Beros, K. T. Tait, V. E. Di Cecco, D. E. Moser MAPS, Version of Record online: 19 May 2024 LINK (OPEN ACCESS)PDF (OPEN ACCESS) “Achondrites provide an opportunity to examine the igneous processes of…
An anorthositic meteorite supporting an ancient magma ocean on Vesta
Shijie Li, Dongliang Zhang, Qiao Shu, Huiming Bao, Xiaobin Cao, Jia Liu, Liping Qin, Yan Fan, Shenghua Zhou, Dehan Shen & Mingbao Li Nature Astronomy LINK “The widespread occurrence of ferroan anorthosites and other magmatic…
A 4,565-My-old record of the solar nebula field
Clara Maurel and Jérôme Gattacceca PNAS, March 4, 2024 121 (12) LINK “ABSTRACT: Magnetic fields in protoplanetary disks are thought to play a prominent role in the formation of planetary bodies. Acting upon turbulence and…
Light noble gases in 11 achondrites: Cosmic ray exposure ages, gas retention ages, and preatmospheric sizes
Thomas Smith, Huaiyu He, Shijie Li, Fei Su MAPS, Version of Record online: 18 October 2023 LINK “We report light noble gas (He, Ne, and Ar) concentrations and isotopic ratios in 11 achondrites, Tafassasset (unclassified…
Igneous meteorites suggest Aluminium-26 heterogeneity in the early Solar NebulaOPEN ACCESS
Evgenii Krestianinov, Yuri Amelin, Qing-Zhu Yin, Paige Cary, Magdalena H. Huyskens, Audrey Miller, Supratim Dey, Yuki Hibiya, Haolan Tang, Edward D. Young, Andreas Pack & Tommaso Di Rocco Nature Communications, Volume 14, Article number: 4940…
Evidence for Very Early Planetesimal Formation and 26Al/27Al Heterogeneity in the Protoplanetary DiskOPEN ACCESS
J. N. Connelly, J. Bollard, E. Amsellem, M. Schiller, K. K. Larsen, and M. Bizzarro The Astrophysical Journal Letters, Volume 952, Number 2 LINK (OPEN ACCESS)PDF (OPEN ACCESS) “We present a U-corrected Pb–Pb age of…
Al Huwaysah 010: The most reduced brachinite, so farOPEN ACCESS
Cristian Carli, Anna Barbaro, Mara Murri, Maria Chiara Domeneghetti, Antonio Langone, Enrico Bruschini, Alice Stephant, Matteo Alvaro, Stefania Stefani, Tiberio Cuppone, Martina Casalini, Alessandra Migliorini, Ted L. Roush, Giovanni Pratesi MAPS, Version of Record online:…
Upper limits of water contents in olivine and orthopyroxene of equilibrated chondrites and several achondritesOPEN ACCESS
Dennis Harries, Xuchao Zhao, Ian Franchi MAPSVersion of Record online: 13 April 2023 LINK (OPEN ACCESS)PDF (OPEN ACCESS) “Hydroxyl defects in nominally anhydrous minerals (NAMs) were potential carriers of water in the early Solar System…
Mass-dependent nickel isotopic variations in achondrites and lunar rocks
Shui-Jiong Wang, Shi-Jie Li, Yangting Lin, Si-Zhang Sheng Geochimica et Cosmochimica ActaIn Press, Journal Pre-proof, Available online 11 April 2023 LINK “We present high-precision mass-dependent nickel isotopic data for a comprehensive suite of achondrites and…
Degassing of early-formed planetesimals restricted water delivery to Earth
M. E. Newcombe, S. G. Nielsen, L. D. Peterson, J. Wang, C. M. O’D. Alexander, A. R. Sarafian, K. Shimizu, L. R. Nittler & A. J. Irving NaturePublished: 15 March 2023 LINK “The timing of…
Thermal history of the Erg Chech 002 parent body: Early accretion and early differentiation of a small asteroidOPEN ACCESS
Wladimir Neumann, Robert Luther, Mario Trieloff, Philip M. Reger, Audrey Bouvier Draft version: 27 February 2023 PDF (OPEN ACCESS) “The history of accretion and differentiation processes in the planetesimals is provided by various groups of…
Experimental Study of Ungrouped Achondrite Erg Chech 002
Balemian-Spencer M. F.* Krawczynski M. J. Carpenter P. K. Ogliore R. C. 54th Lunar and Planetary Science Conference 2023abstract [#2574] Erg Chech is ancient / Its chemistry is funky / Let’s talk about it.
K-Ca dating and Ca isotope composition of the oldest Solar System lava, Erg Chech 002OPEN ACCESS
W. Dai, F. Moynier, L. Fang, J. Siebert Geochemical Perspectives Letters v24 LINK (OPEN ACCESS)PDF (OPEN ACCESS) “Erg Chech 002 (EC 002) is an andesitic meteorite, which is the oldest lava in the Solar System…
Evidence for Enrichment of Niobium-92 in the Outer Protosolar DiskOPEN ACCESS
Yuki Hibiya, Tsuyoshi Iizuka, Hatsuki Enomoto, and Takehito Hayakawa The Astrophysical Journal Letters, Volume 942, Number 1 LINK (OPEN ACCESS)PDF (OPEN ACCESS) The short-lived radionuclide, niobium-92 (92Nb), has been used to estimate the site of…
Gaia search for early-formed andesitic asteroidal crustsOPEN ACCESS
Marjorie Galinier, Marco Delbo, Chrysa Avdellidou, Laurent Galluccio, Yves Marrocchi Astronomy & Astrophysics manuscript (January 3, 2023) PDF (OPEN ACCESS) “Context. Andesitic meteorites are among the oldest achondrites known to date. They record volcanic events…
Al-Mg and U-Pb chronological records of Erg Chech 002 ungrouped achondrite meteorite
Philip M. Reger, Yvonne Roebbert, Wladimir Neumann, Abdelmouhcine Gannoun, Marcel Regelous, Winfried H. Schwarz, Thomas Ludwig, Mario Trieloff, Stefan Weyer, Audrey Bouvier Geochimica et Cosmochimica ActaIn Press, Journal Pre-proof, Available online 23 December 2022 LINK…
53Mn-53Cr chronology and ε54Cr-Δ17O genealogy of Erg Chech 002: the oldest andesite in the Solar SystemOPEN ACCESS
Aryavart Anand, Pascal M. Kruttasch, Klaus Mezger Accepted in ‘Meteoritics & Planetary Science’ journal PDF (OPEN ACCESS) Update (23 October 2022): MAPS LINK “The meteorite sample Erg Chech (EC) 002 is the oldest felsic igneous…
A detailed record of early solar system melting in the carbonaceous achondrites Northwest Africa 7680 and 6962
Brendt C. Hyde, Desmond E. Moser, Kimberly T. Tait, James R. Darling, Qing-Zhu Yin, Matthew E. Sanborn, Neil R. Banerjee, Arshad Ali, Iffat Jabeen, Hugo Moreira MAPS, Version of Record online: 18 August 2022 LINK…
Early silicic magmatism on a differentiated asteroid
Robert W. Nicklas, James M. D. Day, Kathryn G. Gardner-Vandy & Arya Udry Nature GeosciencePublished: 04 August 2022 LINK “Unlike the other terrestrial planets, Earth has a substantial silica-rich continental crust with a bulk andesitic…
Anomalous Acapulcoite Stones Found in Close Proximity to the Erg Atouila 001 Achondrite Provide Evidence for a Heterogeneous Sodium-Rich Meteoroid Derived from the Acapulcoite-Lodranite Parent Body
Irving A. J., Carpenter P. K. MetSoc2022 abstract #6370 LINK “Anomalous albite-rich acapulcoite stones found near the Erg Atouila 001 sodic achondrite in Mali may be components of the same heterogeneous meteoroid.”
Paleomagnetic Investigation of the Oldest-Known Andesite Erg Chech 002
Maurel C. Gattacceca J. Barrat J.-A. MetSoc22 abstract [#6053] LINK “We present the first paleomagnetic study of the oldest-known andesitic meteorite Erg Chech 002. The meteorite holds a stable magnetic record, which may be attributed…
Structure of differentiated planetesimals: A chondritic fridge on top of a magma ocean
Cyril Sturtz, Angela Limare, Marc Chaussidon, Édouard Kaminski IcarusIn Press, Journal Pre-proof, Available online 28 May 2022 LINK “Highlights • We study the formation and the thermal evolution of planetesimals that accreted undifferentiated material during…
Half-life and initial Solar System abundance of 146Sm determined from the oldest andesitic meteoriteOPEN ACCESS
Linru Fang, Paul Frossard, Maud Boyet, Audrey Bouvier, Jean-Alix Barrat, Marc Chaussidon, and Frederic Moynier PNASMarch 15, 2022 | 119 (12) LINK (OPEN ACCESS)PDF (OPEN ACCESS) “The formation and differentiation of planetary bodies are dated…
Ultrasodic, Albite-Rich Syenitic Achondrite Erg Atouila 001: A Highly Evolved Felsic Igneous Differentiate from the Acapulcoite-Lodranite Parent Body
Irving A. J., Boesenberg J. S., Ziegler K. LPSC2022 abstract #2059 LINK “Studies of a unique albite-rich achondrite suggest that it is a highly fractionated partial melt related to acapulcoites-lodranites.”
ERG ATOUILA 001: UNIQUE ALBITITE ACHONDRITE METEORITE
C. B. Agee, A. J. Ross, M. N. Spilde, K. Ziegler 53rd Lunar and Planetary Science Conference (2022) abstract [#2442] LINK “Erg Atouila 001 is the first example of an albitite or syenite meteorite, and…
Olivine-rich achondrites from Vesta and the missing mantle problemOPEN ACCESS
Zoltan Vaci, James M. D. Day, Marine Paquet, Karen Ziegler, Qing-Zhu Yin, Supratim Dey, Audrey Miller, Carl Agee, Rainer Bartoschewitz & Andreas Pack Nature Communications, Volume 12, Article number: 5443 (2021) LINK (OPEN ACCESS)PDF (OPEN…
Thermal History and Structure of the Tafassite Parent Body
Neumann W. *, Ma N., Neri A., Schwarz W. H., Ludwig T., Trieloff M., Klahr H., Bouvier A. 84th Annual Meeting of The Meteoritical Society 2021 (abstract # 6153) PDF We identified a first group…
Noble Gas Chronology of Erg Chech 002 Ungrouped Achondrite
Takenouchi A., Sumino H., Yamaguchi A., Barrat J. A. 84th Annual Meeting of The Meteoritical Society 2021 (abstract # 6162) PDF We conducted Ar-Ar analyses of recently found andesitic achondrite Erg Chech 002. The Ar-Ar…
Petrography of Fine-Grained Domains in Ungrouped Achondrite Erg Chech 002: Evidence for Different Cooling Histories?
Hamann C., Collinet M., Schwinger S., Kaufmann F. E. D., Bonato E., Greshake A., Maturilli A., Helbert J., Hecht L. 84th Annual Meeting of The Meteoritical Society 2021 (abstract # 6236) PDF Here we describe…
Ruthenium isotopic fractionation in primitive achondrites: Clues to the early stages of planetesimal meltingOPEN ACCESS
Timo Hopp, Thorsten Kleine Geochimica et Cosmochimica ActaIn Press, Journal Pre-proof, Available online 23 March 2021 LINK (OPEN ACCESS) “Primitive achondrites derive from the residual mantle of incompletely differentiated planetesimals, from which partial silicate and…
A 4,565-My-old andesite from an extinct chondritic protoplanetOPEN ACCESS
Jean-Alix Barrat, Marc Chaussidon, Akira Yamaguchi, Pierre Beck, Johan Villeneuve, David J. Byrne, Michael W. Broadley, and Bernard Marty PNAS March 16, 2021 118 (11) LINK Update (6 May 2021): PDF (OPEN ACCESS) “The age…
Evaluating the O‐Cr‐Mo isotope signatures in various meteorites representing core–mantle–crust fragments: Implications for partially differentiated planetesimal(s) accreted in the early outer solar system
Arshad Ali, Iffat Jabeen Meteoritics & Planetary ScienceVersion of Record online: 07 February 2021 LINK “The Allende, Eagle Station pallasites (ESP), some ungrouped achondrites (UA), and ungrouped irons (UI) represent different types of meteorites; these…
A New Occurrence of Phosphoran Olivine in Ungrouped Achondrite Northwest Africa 12319
R. L. Pang, Du W. 52nd Lunar and Planetary Science Conference (2021), Abstract #2417 PDF “We report the first description of P-rich olivine (up to 12.4 wt% P2O5) in an ungrouped achondrite NWA 12319 and…
Petrology and Oxygen Isotopic Composition of Two Different Ungrouped Highly Magnesian, Reduced Ultramafic Achondrites (Northwest Africa 11562/12969 and Northwest Africa 13307): More Samples from Unknown Parent Bodies
A. J. Irving, Carpenter P. K., Ziegler K. 52nd Lunar and Planetary Science Conference (2021), Abstract #2244 PDF “We describe unusual highly magnesian, reduced harzburgitic, and websteritic achondrites which differ significantly from the more well-known…
Mineralogy and Bulk Elemental Composition of Ungrouped Relatively Sodic Gabbroic Achondrite Erg Chech 002: An Ancient Planetary Crustal Sample?
P. K. Carpenter, Irving A. J., Righter M., Lapen T. J., Tepper J. H. 52nd Lunar and Planetary Science Conference (2021), Abstract #2205 PDF “A unique mafic gabbroic achondrite characterized by sodic plagioclase may represent…
Petrology and Geochemistry of Erg Chech 002, the Oldest Andesite in the Solar System
A. Yamaguchi, Barrat J. A., Chaussidon M., Beck P., Villeneuvee J. et al. 52nd Lunar and Planetary Science Conference (2021), Abstract #1892 PDF “We present the petrology and geochemistry of Erg Chech 002, and discuss…
Mineralogy and Cooling History of Ungrouped Achondrite Erg Chech 002
T. Mikouchi, Zolensky M. E. 52nd Lunar and Planetary Science Conference (2021), Abstract #2457 PDF “Erg Chech 002 is characterized by large pyroxene xenocrysts whose diffusive zoning profiles suggest fast cooling from high temperature. Trapping…
Multi-Stage Differentiation History of Andesitic Achondrite Erg Chech 002
R. W. Nicklas, Day J. M. D., Gardner-Vandy K. G., Udry A. 52nd Lunar and Planetary Science Conference (2021), Abstract #1074 PDF “Erg Chech 002 is a new evolved achondrite dominated by pyroxene, plagioclase, and…
26Al Chronology of Erg Chech 002, the Oldest Andesite in the Solar System
M. Chaussidon, Barrat J. A., Yamaguchi A., Beck P., Villeneuve J. et al. 52nd Lunar and Planetary Science Conference (2021), Abstract #2222 PDF “26Al chronology shows that the Erg Chech 002 meteorite of andesitic composition…
Titanium isotope fractionation in solar system materials
Niel H. Williams, Manuela A. Fehr, Ian J. Parkinson, Maximilian B. Mandl, Maria Schönbächler Chemical GeologyIn Press, Journal Pre-proof, Available online 1 December 2020, 120009 LINK “Highlights • Nebular processes produce limited Ti isotope fractionation…
Sulfide‐dominated partial melting pathways in brachinites
Samuel D. Crossley, Richard D. Ash, Jessica M. Sunshine, Catherine M. Corrigan, Timothy J. McCoy, David W. Mittlefehldt, Igor S. Puchtel Meteoritics & Planetary ScienceVersion of Record online: 09 September 2020 LINK “Petrogenetic relationships among…
Early sulfur‐rich magmatism on the ungrouped achondrite Northwest Africa 7325 differentiated parent body
Jing Yang, Yangting Lin, Hitesh Changela, Liewen Xie, Bin Chen, Jinhui Yang Meteoritics & Planetary ScienceVersion of Record online:08 September 2020 LINK “The ungrouped achondrite Northwest Africa (NWA) 7325 parent body underwent a severe impact…
Linking asteroids and meteorites to the primordial planetesimal populationOPEN ACCESS
Richard C. Greenwood, Thomas H. Burbine, Ian A. Franchi Geochimica et Cosmochimica Acta In Press, Journal Pre-proof, Available online 11 February 2020 LINK (OPEN ACCESS) PDF (OPEN ACCESS) “Meteorites provide a unique insight into early…
A Water-Rich Proto-Planet Inferred by Tridymite and Pyroxene in the Oldest Igneous Achondrite Northwest Africa 11119
A. Cernok, K. Tait, M. Anand, I. Nicklin, L. White, T. Kizovski, X. Zhao, I. A. Franchi 51st Lunar and Planetary Science Conference (2020), Abstract #1900 PDF (OPEN ACCESS) “The meteorite Northwest Africa (NWA) 11119…
Northwest Africa 12869: Primitive Achondrite from the CR2 Parent Body or Member of a New Meteorite Group?
C. B. Agee, H. Aikin, K. Ziegler 51st Lunar and Planetary Science Conference (2020), Abstract #2292 PDF (OPEN ACCESS) “We report here the classification of a new primitive achondrite, Northwest Africa (NWA) 12869, which is…
Heterogeneous accretion of Earth inferred from Mo-Ru isotope systematicsOPEN ACCESS
Timo Hopp, Gerrit Budde, Thorsten Kleine Earth and Planetary Science Letters (17 January 2020) PDF (OPEN ACCESS) LINK (OPEN ACCESS) “The Mo and Ru isotopic compositions of meteorites and the bulk silicate Earth (BSE) hold…
Evidence for anorthositic crust formed on an inner solar system planetesimalOPEN ACCESS
P. Frossard, M. Boyet, A. Bouvier, T. Hammouda, J. Monteux Geochemical Perspectives Letters v11 doi: 10.7185/geochemlet.1921 Published 7 October 2019 LINK (OPEN ACCESS) PDF (OPEN ACCESS) “During the first million years of solar system history,…
Ferrous oxide-rich asteroid achondrites
James M.D. Day, Christopher A. Corder, Nelly Assayag, Pierre Cartigny Geochimica et Cosmochimica Acta In Press, Accepted Manuscript, Available online 19 April 2019 LINK “Ferrous oxide (FeO)-rich asteroid achondrites can be defined as asteroid-derived samples…
Evidence for early impact on a hot differentiated planetesimal from Al-rich micro-inclusions in ungrouped achondrite Northwest Africa 7325
Jing Yang, Chi Zhang, Masaaki Miyahara, Xu Tang, Lixin Gu, Yangting Lin Geochimica et Cosmochimica Acta In Press, Accepted Manuscript, Available online 13 March 2019 LINK “The ungrouped achondrite NWA 7325 is a cumulate olivine…
Highly siderophile element and 187Re‐187Os isotopic systematics of ungrouped achondrite Northwest Africa 7325: Evidence for complex planetary processes
Gregory J. Archer, Richard J. Walker, Anthony J. Irving Meteoritics & Planetary Science First Published: 24 February 2019 LINK “The abundances of highly siderophile elements (HSE; including Re, Os, Ir, Ru, Pt, and Pd) and…
Petrological, petrofabric, and oxygen isotopic study of five ungrouped meteorites related to brachinites
Hikari Hasegawa, Takashi Mikouchi, Akira Yamaguchi, Masahiro Yasutake, Richard C. Greenwood, Ian A. Franchi Meteoritics & Planetary Science First Published: 12 February 2019 LINK “Northwest Africa (NWA) 6112, Miller Range (MIL) 090206 (plus its pairs:…
H and Cl isotope characteristics of indigenous and late hydrothermal fluids on the differentiated asteroidal parent body of Grave Nunataks 06128OPEN ACCESS
Romain Tartèse, Mahesh Anand, Ian A. Franchi Geochimica et Cosmochimica Acta In Press, Accepted Manuscript, Available online 25 January 2019 LINK (OPEN ACCESS) “The paired achondrites Graves Nunataks (GRA) 06128 and 06129 are samples of…
Pb-Isotopic and Initial Sr Ages of the Achondrite NWA 4587
Y. Amelin, E. Rydeblad, E. Krestianinov, M. H. Huyskens, Q,-Z. Yin 50th Lunar and Planetary Science Conference (2019), Abstract #2261 PDF abstract
A New Not So Eucrite-Like Ungrouped Achondrite: Northwest Africa 12338
Z. Guo, A. Bouvier, E. Webb, A. Alexandre, F. J. Longstaffe, R. A. Korotev, Z. Zajacz, M. Boyet 50th Lunar and Planetary Science Conference (2019), Abstract #1583 PDF abstract
Carbonaceous Achondrites Northwest Africa 6704/6693: Milestones for Early Solar System Chronology and Genealogy
Matthew E. Sanborn, Josh Wimpenny, Curtis D. Williams, Akane Yamakawa, Yuri Amelin, Anthony J.Irving, Qing-Zhu Yin Geochimica et Cosmochimica Acta In Press, Accepted Manuscript, Available online 14 October 2018 LINK “Northwest Africa (NWA) 6704/6693 are…
U-Pb, Rb-Sr and Ar-Ar systematics of the ungrouped achondrites Northwest Africa 6704 and Northwest Africa 6693
Yuri Amelin, Piers Koefoed, Tsuyoshi Iizuka, Vera Assis Fernandes, Magdalena H.Huyskens, Qing-Zhu Yin, Anthony J. Irving Geochimica et Cosmochimica Acta In Press, Accepted Manuscript, Available online 27 September 2018 LINK “We report U-Pb, 87Rb-87Sr, 40Ar-39Ar…
Silica-rich volcanism in the early solar system dated at 4.565 GaOPEN ACCESS
Poorna Srinivasan, Daniel R. Dunlap, Carl B. Agee, Meenakshi Wadhwa, Daniel Coleff, Karen Ziegler, Ryan Zeigler & Francis M. McCubbin Nature Communications 9, 3036 Published: 02 August 2018 LINK (OPEN ACCESS) PDF (OPEN ACCESS) Abstract…
The origin of the unique achondrite Northwest Africa 6704: Constraints from petrology, chemistry and Re–Os, O and Ti isotope systematics
Yuki Hibiya, Gregory J. Archer, Ryoji Tanaka, Matthew E. Sanborn, Yuya Sato, Tsuyoshi Iizuka, Kazuhito Ozawa, Richard J. Walker, Akira Yamaguchi, Qing-Zhu Yin, Tomoki Nakamura, Anthony J. Irving Geochimica et Cosmochimica Acta Available online 9…
The ungrouped achondrite Northwest Africa (NWA) 7325: Spectral reflectance properties and implications for parent body identification
Edward A. Cloutis, Vishnu Reddy, David T. Blewett Icarus In Press, Available online 24 April 2018 LINK “Highlights • the ungrouped achondrite NWA 7325 has been spectrally characterized • NWA 7325 reflectance spectra show diagnostic…
Noble gas composition, cosmic-ray exposure age, 39Ar-40Ar, and I-Xe analyses of ungrouped achondrite NWA 7325
Hopp, J., Schröter, N., Pravdivtseva, O., Meyer, H.-P., Trieloff, M. and Ott, U. Meteorit Planet Sci. doi:10.1111/maps.13062 LINK “Northwest Africa (NWA) 7325 is an anomalous achondrite that experienced episodes of large-degree melt extraction and interaction…
Early Differentiation in the Carbonaceous Chondrite Forming Region of the Solar Nebula: New Insight from the Achondrites Northwest Africa 7680/6962
M. E. Sanborn, Q.-Z. Yin, B. C. Hyde, K. T. Tait, D. E. Moser 49th Lunar and Planetary Science Conference (2018), Abstract #2296 abstract
Magmatic Evolution Trends Within the Ungrouped Achondrite Meteorite Record
Z. Vaci, C. B. Agee, K. Ziegler, M. T. Heizler 49th Lunar and Planetary Science Conference (2018), Abstract #1256 abstract
Dark Xenolith in the Ungrouped Trachyandesitic Achondrite Northwest Africa 11575
M. A. Habermann, C. B. Agee 49th Lunar and Planetary Science Conference (2018), Abstract #2626 abstract
Northwest Africa 11575: Unique Ungrouped Trachyandesite Achondrite
C. B. Agee, M. A. Habermann, K. Ziegler 49th Lunar and Planetary Science Conference (2018), Abstract #2226 abstract
Pb-Pb Age of the Ungrouped Achondrite Northwest Africa 11119: Timing of Extraterrestrial Silica-Rich Volcanism
D. R. Dunlap, P. K. Koefoed, Y. Amelin, M. Wadhwa, C. B. Agee 49th Lunar and Planetary Science Conference (2018), Abstract #2302 abstract
Northwest Africa (NWA) 11119 — Probing an Unknown Early Planetary Body?
V. H. Hoffmann, K. Wimmer, R. Hochleitner, M. Kaliwoda 49th Lunar and Planetary Science Conference (2018), Abstract #2468 abstract
Silica-Rich Magmatism in the Early Solar System: U-Pb and Al-Mg Chronology and Cr Isotopes of Ungrouped Achondrite Northwest Africa 11119
M. H. Huyskens, M. E. Sanborn, Q. Z. Yin, C. B. Agee 49th Lunar and Planetary Science Conference (2018), Abstract #2311 abstract
Shock history of the fossil ungrouped achondrite Österplana 065: Raman spectroscopy and TEM of relict chrome-spinel grains
Rout, S. S., Heck, P. R. and Schmitz, B. Meteoritics & Planetary Science. doi: 10.1111/maps.13041 LINK “Chrome-spinel grains from the fossil ungrouped achondrite Österplana 065 (Öst 065) recovered from Middle Ordovician limestone in Sweden were…
U-Pb and Pb-Pb apatite ages for Antarctic achondrite Graves Nunataks 06129
Zhou, Q., Yin, Q.-Z., Shearer, C. K., Li, X.-H., Li, Q.-L., Liu, Y., Tang, G.-Q. and Li, C.-L. Meteoritics & Planetary Science. doi: 10.1111/maps.13026 LINK “The Antarctic achondrite Graves Nunataks 06128 (GRA 06128) and Graves…
The ungrouped chondrite El Médano 301 and its comparison with other reduced ordinary chondrites
Hamed Pourkhorsandi, Jérôme Gattacceca, Bertrand Devouard, Massimo D’Orazio, Pierre Rochette, Pierre Beck, Corinne Sonzogni, Millarca Valenzuela Geochimica et Cosmochimica Acta In Press, Accepted Manuscript, Available online 12 September 2017 LINK “El Médano 301 (EM 301)…
Partial Melting of Oxidized Planetesimals: An Experimental Study to Test the Formation of Oligoclase-rich Achondrites Graves Nunataks 06128 and 06129
Nicole G. Lunning, Kathryn G. Gardner-Vandy, Emma S. Sosa, Timothy J. Mccoy, Emma S. Bullock, Catherine M. Corrigan Geochimica et Cosmochimica Acta In Press, Accepted Manuscript, Available online 11 July 2017 LINK “The meteorites Graves…
Iron Isotope Compositions of Achondritic Meteorites
Ray S. * Rai V. K. Hines R. Romaniello S. Wadhwa M. 80th Annual Meeting of the Meteoritical Society 2017 [#6400] abstract (PDF) “Here, we report the iron isotope compositions of three ungrouped achondrites, North…
Andesitic-Dacitic Achondrite Northwest Africa 11119: Evidence for Extraterrestrial Silica-Rich Magmatism
Srinivasan P. * Agee C. B. McCubbin F. M. Ziegler K. 80th Annual Meeting of the Meteoritical Society 2017 [#6129] abstract (PDF) “Petrologic and isotopic results for ungrouped achondrite Northwest Africa 11119 shows a possible…
Reactions Along the Boundaries Between Plagioclase and Diopside of Ungrouped Achondrite Northwest Africa 7325
Yang J. * Lin Y. T. 80th Annual Meeting of the Meteoritical Society 2017 [#6240] abstract (PDF) “In order to clarify the late-stage processes after the crystallization of NWA 7325, we analysed chemical compositions and…
Petrological and Petrofabric Study of Roberts Massif 04239 Compared to Tafassasset and Brachinites
Hasegawa H. * Mikouchi T. Yamaguchi A. 80th Annual Meeting of the Meteoritical Society 2017 [#6169] abstract (PDF) “The petrology and petrofabrics of Roberts Massif 04239 suggests that it has experienced differentiation processes similar to…
26Al-26Mg Systematics of the Ungrouped Achondrite Northwest Africa 11119: Timing of Extraterrestrial Silica-Rich Magmatism
Dunlap D. R. * Wadhwa M. Agee C. 80th Annual Meeting of the Meteoritical Society 2017 [#6268] abstract “Ungrouped achondrite NWA 11119 has an andesite-dacite bulk SiO2. The high precision 26Al-26Mg internal isochron age is…
Meteorite falls in Bulgaria: Reappraisal of mineralogy, chemistry, and classification.
Dekov, V., Rochette, P. and Gattacceca, J. Meteoritics & Planetary Science. doi: 10.1111/maps.12879 LINK “We present a summary of the mineralogy, mineral chemistry, and magnetic characteristics of all the five Bulgarian meteorite falls. We report…
A nonmagnetic differentiated early planetary body
Benjamin P. Weiss, Huapei Wang, Thomas G. Sharp, Jérôme Gattacceca, David L. Shuster, Brynna Downey, Jinping Hu, Roger R. Fu, Aaron T. Kuan, Clément Suavet, Anthony J. Irving, Jun Wang, Jiajun Wang Earth and Planetary…
In search of the Earth-forming reservoir: Mineralogical, chemical, and isotopic characterizations of the ungrouped achondrite NWA 5363/NWA 5400 and selected chondrites.
Burkhardt, C., Dauphas, N., Tang, H., Fischer-Gödde, M., Qin, L., Chen, J. H., Rout, S. S., Pack, A., Heck, P. R. and Papanastassiou, D. A. Meteoritics & Planetary Science. doi: 10.1111/maps.12834 LINK “High-precision isotope data…
Reassessing the Formation of CK7 Northwest Africa (NWA) 8186
P. Srinivasan, F. M. McCubbin, T. J. Lapen, M. Righter, C. B. Agee 48th Lunar and Planetary Science Conference (2017), Abstract #1995 LINK
Ultra-Refractory Calcium-Aluminum-Rich Inclusion in an AOA in CR Chondrite Yamato-793261
M. Komatsu, T. J. Fagan, A. Yamaguchi, T. Mikouchi, M. Yasutake, M. E. Zolensky 48th Lunar and Planetary Science Conference (2017), Abstract #2009 PDF
Benchmarking the Pb-Pb Age of Ungrouped Achondrite NWA 6704 for Project Milestones
M. H. Huyskens, Q.-Z. Yin, Y. Amelin 48th Lunar and Planetary Science Conference (2017), Abstract #2260 PDF
Northwest Africa 11042: Ungrouped Ultramafic Cumulate Achondrite: Petrology, Oxygen Isotopes, and High Pressure Phases
Z. Vaci, C. B. Agee, K. Ziegler, M. Humayun 48th Lunar and Planetary Science Conference (2017), Abstract #2016 PDF
Rb-Sr Systematics of Ungrouped Achondrites
Y. Amelin 48th Lunar and Planetary Science Conference (2017), Abstract #1343 PDF
Calcic Plagioclase-Rich Clasts Resembling the NWA 7325 Ungrouped Achondrite in Polymict Ureilites
S. Boyle, C. A. Goodrich, N. T. Kita, A. H. Treiman, J. Gross 48th Lunar and Planetary Science Conference (2017), Abstract #1219 PDF
In Search of a Group for the Ungrouped Achondrites NWA 7680 and NWA 6962
B. C. Hyde, D. E. Moser, K. T. Tait, J. R. Darling, H. Moreira 48th Lunar and Planetary Science Conference (2017), Abstract #2168 PDF
Titanium, Vanadium and Chromium Valences in Silicates of Ungrouped Achondrite NWA 7325 and Ureilite Y-791538 Record Highly-Reduced Origins
S.R. Sutton, C.A. Goodrich, S. Wirick Geochimica et Cosmochimica Acta In Press, Accepted Manuscript, Available online 2 February 2017 LINK “Titanium, Cr, and V valences were determined by applying micro-X-ray Absorption Near Edge Structure (micro-XANES)…
Petrogenesis and Provenance of Ungrouped Achondrite Northwest Africa 7325 from Petrology, Trace Elements, Oxygen, Chromium and Titanium Isotopes, and Mid-IR Spectroscopy
Cyrena A. Goodrich, Noriko T. Kita, Qing-Zhu Yin, Matthew E. Sanborn, Curtis D. Williams, Daisuke Nakashima, Melissa D. Lane, Shannon Boyle Geochimica et Cosmochimica Acta In Press, Accepted Manuscript, Available online 5 January 2017 LINK…
Iron Isotope Compositions of Achondritic Meteorites from Distinct Parent Bodies
Dybal E. M. K. Wadhwa M. * Romaniello S. Hines R. 79th Annual Meeting of the Meteoritical Society (2016) #6535 LINK
U-Pb Age of the Ungrouped Achondrite NWA 8486
Cartwright J. A. * Amelin Y. Koefoed P. Wadhwa M. 79th Annual Meeting of the Meteoritical Society (2016) #6231 abstract
U-Pb and Al-Mg systematics of the ungrouped achondrite Northwest Africa 7325
Piers Koefoed, Yuri Amelin, Qing-Zhu Yin, Josh Wimpenny, Matthew E. Sanborn, Tsuyoshi Iizuka, Anthony J. Irving Geochimica et Cosmochimica Acta In Press, Accepted Manuscript, Available online 1 April 2016 LINK “Northwest Africa (NWA) 7325 is…
Northwest Africa 5400/6077: Deciphering the Origin of the Mysterious Achondrite with a New Look at the Isotopic Composition
M. E. Sanborn, Q.-Z. Yin, B. Schmitz, Y. Amelin 47th Lunar and Planetary Science Conference (2016), Abstract #2309 PDF
Assessing the Formation of Ungrouped Achondrite Northwest Africa 8186: Residue, Crystallization Product, or Recrystallized Chondrite?
P. Srinivasan, F. M. McCubbin, C. B. Agee 47th Lunar and Planetary Science Conference (2016), Abstract #1620 PDF
Highly Siderophile Element and 187Re-187Os Isotopic Systematics of Ungrouped Achondrite Northwest Africa 6704
G. J. Archer, R. J. Walker, A. J. Irving, Y. Amelin 47th Lunar and Planetary Science Conference (2016), Abstract #2578 PDF
Silicon Isotope Composition of Ungrouped Achondrite Northwest Africa 7325
X. Chen, T. J. Lapen, R. Andreasen, M. Righter, A. J. Irving, H. S. Chafetz 47th Lunar and Planetary Science Conference (2016), Abstract #2812 PDF
The initial abundance and distribution of 92Nb in the Solar System
Tsuyoshi Iizuka, Yi-Jen Lai, Waheed Akram, Yuri Amelin, Maria Schönbächler Earth and Planetary Science Letters Available online 11 February 2016 doi:10.1016/j.epsl.2016.02.005 Updated: February 11, 2016 PDF (open access) abstract “Niobium-92 is an extinct proton-rich nuclide,…
Cosmochemical and spectroscopic properties of Northwest Africa 7325—A consortium study
Weber, I., Morlok, A., Bischoff, A., Hiesinger, H., Ward, D., Joy, K. H., Crowther, S. A., Jastrzebski, N. D., Gilmour, J. D., Clay, P. L., Wogelius, R. A., Greenwood, R. C., Franchi, I. A. and…
Crustal differentiation in the early solar system: clues from the unique achondrite Northwest Africa 7325 (NWA 7325)
J.A. Barrat, R.C. Greenwood, A.B. Verchovsky, Ph. Gillet, C. Bollinger, J.A. Langlade, C. Liorzou, I.A. Franchi Geochimica et Cosmochimica Acta In Press, Accepted Manuscript, Available online 22 July 2015 LINK
The Iodine-Xenon System In Achondrites
Crowther, S. A.; Gilmour, J. D. 78th Annual Meeting of the Meteoritical Society (2015), abstract #5242 abstract (PDF)
Petrology and Oxygen Isotopic Composition of Orthopyroxenitic Achondrite Northwest Africa 8777 and Sodic Ultramafic Achondrite Northwest Africa 10132
Irving A. J., Kuehner S. M., Ziegler K. 78th Annual Meeting of the Meteoritical Society (2015) Berkeley, USA July 27-31 2015 PDF (abstract)
U-Pb Age of Ungrouped Achondrite NWA 10132
Koefoed P., Amelin Y., Irving A. J. 78th Annual Meeting of the Meteoritical Society (2015) Berkeley, USA July 27-31 2015 PDF (abstract)
26Al-26Mg Systematics of Ungrouped Achondrites: Implications for Timing of Planetesimal Differentiation
Dunlap D. R., Wadhwa M., Romaniello S. J., Souders A. K., Hines R. 78th Annual Meeting of the Meteoritical Society (2015) Berkeley, USA July 27-31 2015 PDF (abstract)
Geochemistry and chronology of the Bunburra Rockhole ungrouped achondrite
Lev J. Spivak-Birndorf, Audrey Bouvier, Gretchen K. Benedix, Samantha Hammond, Gregory A. Brennecka, Kieren Howard, Nick Rogers, Meenakshi Wadhwa, Philip A. Bland, Pavel Spurný and Martin C. Towner Meteoritics & Planetary Science. doi: 10.1111/maps.12443 Article…
Comparative Non-Destructive Study of the Zaklodzie and NWA 4301 Enstatite Achondrites via Micro-Computed Tomography
D. D. Uribe, P. J. A. McCausland, M .R. M. Izawa, R. L. Flemming, J. U. Umoh, D. W. Holdsworth 46th Lunar and Planetary Science Conference (2015), Abstract #2817 PDF LINK
Differentiated Planetesimals with Chondritic Crusts: New Δ17O-ε54Cr Evidence in Unique, Ungrouped Achondrites for Partial Melting of the CV/CK and CO Parent Bodies
M. E. Sanborn, Q.-Z. Yin, A. J. Irving, T. E. Bunch 46th Lunar and Planetary Science Conference (2015), Abstract #2259 PDF LINK
Petrology of Ungrouped and Anomalous Achondrites SaU 493, NWA 4470, NWA 6962, and NWA 5297
D. R. Dunlap, Y. J. Ku, L. A. J. Garvie, M. Wadhwa 46th Lunar and Planetary Science Conference (2015), Abstract #2570 PDF LINK
Highly Siderophile Element and 187Re-187Os Isotopic Systematics of Ungrouped Achondrite Northwest Africa 7325
G. J. Archer, R. J. Walker, A. J. Irving 46th Lunar and Planetary Science Conference (2015), Abstract #1987 PDF LINK
A partial melting study of an ordinary (H) chondrite composition with application to the unique achondrite Graves Nunataks 06128 and 06129
Usui, T., Jones, J. H. and Mittlefehldt, D. W. (2015) Meteoritics & Planetary Science. doi: 10.1111/maps.12392 LINK
Mid-infrared emission spectroscopy of meteorite NWA 7325: Identifying the mineralogy with a non-destructive, remote-sensing technique
Melissa Lane, Cyrena Goodrich, Noriko Kita A polished chip of the Northwest Africa 7325 meteorite, a highly reduced, ungrouped achondrite [1-4], was analyzed using an FTIR spectrometer modified for emission measurements. The chip was roughly…
The Unique Differentiated Meteorite NWA 7325: Highly Reduced, Stark Affinities to E-Chondrites and Unknown Parental Planet
A. El Goresy, T. Nakamura, M. Miyahara, E. Ohtani, Ph. Gillet, K. Jogo, M. Yamanobe and H. Ishida PDF LINK
Noble Gas and Mineralogical Studies of NWA 7325 Ungrouped Achondrite
Hasegawa, H.; Haba, M. K.; Nagao, K.; Mikouchi, T.; Bizzarro, M. PDF LINK
Abundance and Isotopic Composition of Xenon in the Ungrouped Achondrite NWA 7325
Crowther, S. A.; Jastrzebski, N. D.; Weber, I.; Hiesinger, H.; Gilmour, J. D. PDF LINK
Magnetic and Nonmagnetic Differentiated Planetesimals
B. P. Weiss, R. Fu, D. L. Shuster, J. Gattacceca, C. R. Suavet, A. J. Irving Workshop on Planetesimal Formation and Differentiation (2013), Abstract #8047 PDF LINK
