Nucleosynthetic constraints on the origin of Bennu and CI-like asteroidsOPEN ACCESS
Maria Schönbächler, Mattias Ek, Manuela A. Fehr, Katarzyna M. Liszewska, Lara A. E. Meyer, Miriam Rüfenacht, James M. J. Ball, Paul Frossard, Jan Render, Quinn R. Shollenberger, Greg A. Brennecka, Thomas S. Kruijer, Josh Wimpenny,…
Meteoritic organic matter records primitive oxygen reservoirs of the solar system
Daniel R. Crocker, Conel M. O‘D. Alexander, Mark H. Thiemens, and David T. Johnston PNAS, 21 September, 2026 LINK “Unraveling the complex formation and alteration history for extraterrestrial organic matter is key to understanding the…
The iron mineralogy of Bennu samples: similarities and variations among CI chondritic materialsOPEN ACCESS
Kana Amano, Jean-Christophe Viennet, Pierre Beck, Sergey Yaroslavtsev, Dimitrios Bessas, Aleksandr Chumakov, Jean-Philippe Celse, Ludovic Delbes, Tomoki Nakamura, Yuma Enokido, Kanako Sakamoto, Shogo Tachibana, Mathieu Roskosz Geochimica et Cosmochimica Acta, Available online 11 September 2026…
Beyond the Urey-Craig diagram: a ternary framework for iron redox evolution during aqueous alteration of carbonaceous chondrites
Damanveer S. Grewal, Zhongtian Zhang Geochimica et Cosmochimica Acta, In Press, Journal Pre-proof, Available online 3 September 2026 LINK “Water-rock reactions during aqueous alteration were critical in establishing the redox state of early Solar System…
Ryugu and Bennu preserve primordial isotopic heterogeneity absent from the meteorite recordOPEN ACCESS
Martin Bizzarro, Martin Schiller, Elishevah van Kooten, Isaac J. Onyett, Wei Dai, Yuki Masuda, James N. Connelly, Frédéric Moynier, Tetsuya Yokoyama, Maria Schönbächler, Jessica J. Barnes, Ann N. Nguyen, Harold C. Connolly Jr. & Dante…
Reflectance spectroscopy (250–2500 nm) of an aggregate sample from asteroid (101955) BennuOPEN ACCESS
E.A. Cloutis, D.M. Applin, A.A. Simon, B.E. Clark, X.-D. Zou, V.E. Hamilton, R.E. Milliken, T. Hiroi, M.E. Zolensky, K.M. Peters, L.P. Keller, D.N. DellaGiustina, H.C. Connolly Jr, D.S. Lauretta IcarusAvailable online 3 August 2026, 117289…
Mechanical Properties of Oued Chebeika 002 Bundle
Bhatt, Suraj; Garvie, Laurence A. J.; Hoover, Christian G. NASA Planetary Data System, published: 13 April 2026 LINK (OPEN ACCESS) “This bundle provides nanoindentation measurements, associated wavelength dispersive spectroscopy point analyses, wavelength dispersive spectroscopy maps,…
Resolving Complex Mass Interferences in TOF-SIMS Spectra of Extraterrestrial Organics in a Carbonaceous Chondrite
Nomura A.* Moritani K. Nakamura T. Eguchi N. Sano N. et al. METSOC 2026 abstract (PDF) “Developed a preliminary correlation-based analysis for GCIB-TOF-SIMS to resolve mass interferences, enabling initial identification of organics in the carbonaceous…
Thermal Evolution of Volatile-Rich Planetesimals: Implications for Lithological Diversity in Ryugu and CI Chondrites
Yamazaki S.* Mikouchi T. Zolensky M. E. METSOC 2026 abstract (PDF) “We modeled thermal evolution of volatile-rich planetesimals to explain lithological diversity in Ryugu and CI chondrites. Body size (50–100 km), accretion timing (~2–3 Myr),…
CI1 Oued Chebeika 002: Sr-Y Trace Element Distribution Revealed by SXRF Analysis
Tkalcec B. J.* Baert T. Herthogs J. Vekemans B. Vincze L. et al. METSOC 2026 abstract (PDF) “We report the results of the first phase of a two-stage trace element investigation of Oued Chebeika 002…
Chemical and Chromium Isotopic Variabilities at Small Scale in CI Chondrites, Ryugu, Bennu and Related Materials
López García K.* Yokoyama T. Nakanishi N. Shirahata A. Zhu K. METSOC 2026 abstract (PDF) “Elemental and Cr isotopic data show widespread small-scale heterogeneity in carbonaceous materials, most pronounced in Ryugu and CIs, likely reflecting…
Noble Gases of CI1 Chondrites: Comparative Study with Ryugu Samples Returned by the Hayabusa2 Spacecraft
Nagao K.* Nishiizumi K. Caffee M. W. Kim H. Park C. et al. METSOC 2026 abstract (PDF) “Noble gases of six CI1 chondrites: Orgueil, Revelstoke, Yamato 980115, Tonk, Ivuna, and Oued Chebeika 002 (three additional…
Mid-infrared emissivity of partially dehydrated asteroid (162173) Ryugu shows strong signs of aqueous alterationOPEN ACCESS
M. Hamm, M. Grott, H. Senshu, J. Knollenberg, J. de Wiljes, V. E. Hamilton, F. Scholten, K. D. Matz, H. Bates, A. Maturilli, Y. Shimaki, N. Sakatani, W. Neumann, T. Okada, F. Preusker, S. Elgner,…
Abundance and importance of petrological type 1 chondritic materialOPEN ACCESS
Sara S. Russell, M. D. Suttle, A. J. King Meteoritics & Planetary ScienceVersion of Record online: 07 November 2021 LINK (OPEN ACCESS)PDF (OPEN ACCESS) “We review the mineralogy, petrology, and abundance of petrological type 1…
Mineralogy of iron sulfides in CM1 and CI1 lithologies of the Kaidun breccia: Records of extreme to intense hydrothermal alteration
Harries, D. and Zolensky, M. E. Meteoritics & Planetary Science. doi: 10.1111/maps.12648 LINK “The polymict Kaidun microbreccia contains lithologies of C-type chondrites with euhedral iron sulfide crystals of hydrothermal origin. Our FIB-TEM study reveals that…
