The Origins of Asteroidal Rock Disaggregation: Interplay of Thermal Fatigue and Microstructure
Kavan Hazeli,Charles El Mir, Stefanos Papanikolaou, Marco Delbo, K.T. Ramesh Icarus Available online 25 December 2017 LINK “The distributions of size and chemical composition in regolith on airless bodies provide clues to the evolution of…
Type I and type II residual stress in iron meteorites determined by neutron diffraction measurements
Stefano Caporali, Giovanni Pratesi, Saurabh Kabra, Francesco Grazzi Planetary and Space Science In Press, Accepted Manuscript, Available online 25 December 2017 LINK “Highlights • Residual stress determination via neutron diffraction in three iron meteorites. •…
Enhanced nondestructive characterization of ordinary chondrites using complex magnetic susceptibility measurements
Oliver, P., Ralchenko, M., Samson, C., Ernst, R. E., McCausland, P. J. A. and West, G. F. Meteoritics & Planetary Science. doi: 10.1111/maps.13028 LINK “Ordinary chondrites have previously been nondestructively characterized using bulk magnetic susceptibility,…
The Chelyabinsk meteorite: New insights from a comprehensive electron microscopy and Raman spectroscopy study with evidence for graphite in olivine of ordinary chondrites
Kaeter, D., Ziemann, M. A., Böttger, U., Weber, I., Hecht, L., Voropaev, S. A., Korochantsev, A. V. and Kocherov, A. V. Meteoritics & Planetary Science. doi: 10.1111/maps.13027 LINK “We present results of petrographic, mineralogical, and…
Basaltic volcanism on the angrite parent body: Comparison with 4 Vesta
Abernethy, F. A. J., Verchovsky, A. B., Franchi, I. A. and Grady, M. M. Meteoritics & Planetary Science. doi: 10.1111/maps.13016 LINK “Carbon and nitrogen data from stepped combustion analysis of eight angrites, seven eucrites, and…
Triggered Star Formation inside the Shell of a Wolf–Rayet Bubble as the Origin of the Solar SystemOPEN ACCESS
Vikram V. Dwarkadas, Nicolas Dauphas, Bradley Meyer, Peter Boyajian, and Michael Bojazi The Astrophysical Journal, Volume 851, Number 2 PDF (OPEN ACCESS) LINK “A critical constraint on solar system formation is the high 26Al/27Al abundance…
A TEM study of exsolution in Ca-rich pyroxenes from the Paris and Renazzo chondrites: Determination of type I chondrule cooling rates
Cuvillier, P., Chaumard, N., Leroux, H., Zanda, B., Hewins, R. H., Jacob, D. and Devouard, B. Meteoritics & Planetary Science. doi: 10.1111/maps.13032 LINK “We conducted a transmission electron microscope study of the exsolution microstructures of…
An experimental model for the tektite fluvial transport based on the most distal Polish moldavite occurrences
Brachaniec, T. Meteoritics & Planetary Science. doi: 10.1111/maps.13035 LINK “Reworking and redeposition of tektites is a highly complex and multistage geological process including many factors. A tumbling experiment was therefore undertaken with the aim of…
Chemical variations of sulfides and metal in enstatite chondrites—Introduction of a new classification scheme
Weyrauch, M., Horstmann, M. and Bischoff, A. Meteoritics & Planetary Science. doi: 10.1111/maps.13025 LINK “In this study, the metal and sulfide compositions of 45 enstatite chondrites were analyzed to determine possible mineral-chemical trends correlated with…
New clues from Earth’s most elusive impact crater: Evidence of reidite in Australasian tektites from Thailand
Aaron J. Cavosie; Nicholas E. Timms; Timmons M. Erickson; Christian Koeberl Geology (2017) https://doi.org/10.1130/G39711.1 Published:December 20, 2017 LINK “Australasian tektites are enigmatic drops of siliceous impact melt found in an ~8000 × ~13,000 km strewn…
The retention of dust in protoplanetary disks: Evidence from agglomeratic olivine chondrules from the outer Solar SystemOPEN ACCESS (until 25 Feb 2018)
Devin L. Schrader, Kazuhide Nagashima, Scott R. Waitukaitis, Jemma Davidson, Timothy J. McCoy, Harold C. Connolly Jr., Dante S. Lauretta Geochimica et Cosmochimica Acta In Press, Accepted Manuscript, Available online 18 December 2017 LINK (OPEN…
Formation of chondrules in a moderately high dust enriched disk: evidence from oxygen isotopes of chondrules from the Kaba CV3 chondrite
Andreas T. Hertwig, Céline Defouilloy, Noriko T. Kita Geochimica et Cosmochimica Acta In Press, Accepted Manuscript, Available online 16 December 2017 LINK “Oxygen three-isotope analysis by secondary ion mass spectrometry of chondrule olivine and pyroxene…
On the impact origin of Phobos and Deimos III: resulting composition from different impactorsOPEN ACCESS
Francesco C. Pignatale, Sebastien Charnoz, Pascal Rosenblatt, Ryuki Hyodo, Tomoki Nakamura, Hidenori Genda Accepted for publication in ApJ (13/12/2017) PDF (OPEN ACCESS) “The origin of Phobos and Deimos in a giant impact generated disk is…
ANSMET 2017/18 Field Season – End count: 263 finds (2 February 2018)
Last update: 2 February,2018 On 15 December, the first day in the field, team A found the first four meteorites near Mount Cecily in the Grosvenor Mountains. On 10 January the biggest meteorite of the…
Evolution of interstellar organic compounds under asteroidal hydrothermal conditions
V. Vinogradoff, S. Bernard, C. Le Guillou, L. Remusat Icarus Available online 12 December 2017 LINK “Carbonaceous chondrites (CC) contain a diversity of organic compounds. No definitive evidence for a genetic relationship between these complex…
Discovery of a meteoritic ejecta layer containing unmelted impactor fragments at the base of Paleocene lavas, Isle of Skye, ScotlandOPEN ACCESS
Simon M. Drake; Andrew D. Beard; Adrian P. Jones; David J. Brown; A. Dominic Fortes; Ian L. Millar; Andrew Carter;Jergus Baca; Hilary Downes Geology (2017) DOI:https://doi.org/10.1130/G39452.1 Published: December 12, 2017 LINK (OPEN ACCESS) PDF (OPEN…
Structure analysis and conditions of formation of akimotoite in the Tenham chondriteOPEN ACCESS
Tschauner, O., Ma, C., Prescher, C. and Prakapenka, V. B. Meteoritics & Planetary Science. doi: 10.1111/maps.13009 LINK (OPEN ACCESS) PDF (OPEN ACCESS) “Akimotoite (Mg,Fe)SiO3 is one of the most common mineralogical indicators for high-level shock…
Search for sulfates on the surface of Ceres
Bu, C., Rodriguez Lopez, G., Dukes, C. A., Ruesch, O., McFadden, L. A. and Li, J.-Y. Meteoritics & Planetary Science. doi: 10.1111/maps.13024 LINK “The formation of hydrated salts is an expected consequence of aqueous alteration…
Oxygen isotope reservoirs in the outer asteroid belt inferred from oxygen isotope systematics of chondrule olivines and isolated forsterite and olivine grains in Tagish Lake-type carbonaceous chondrites, WIS 91600 and MET 00432OPEN ACCESS
Masakuni Yamanobe, Tomoki Nakamura, Daisuke Nakashima Polar Science Volume 15, March 2018, Pages 29-38 LINK (OPEN ACCESS) PDF (OPEN ACCESS) “To understand oxygen isotope ratios and redox conditions of the chondrule formation environments of the…
Air penetration enhances fragmentation of entering meteoroidsOPEN ACCESS
M. E. Tabetah and H. J. Melosh Meteorit Planet Sci. doi:10.1111/maps.13034 LINK (OPEN ACCESS) PDF (OPEN ACCESS) “The entry and subsequent breakup of the ~17–20 m diameter Chelyabinsk meteoroid deposited approximately 500 kT of TNT…
Collisional stripping of planetary crustsOPEN ACCESS
Philip J. Carter, Zoë M. Leinhardt, Tim Elliott, Sarah T. Stewart, Michael J. Walter Accepted for publication in EPSL PDF (OPEN ACCESS) “Geochemical studies of planetary accretion and evolution have invoked various degrees of collisional…
Theoretical analysis of the atmospheric entry of sub-mm meteoroids of MgxCa1−xCO3 composition
G. Micca Longo, S. Longo Icarus Available online 9 December 2017 LINK “Highlights • This paper is the first study of the atmospheric entry of grains made of mixed carbonatic composition. • Such compositions have…
Bulk chemical compositions of Antarctic meteorites in the NIPR collection
M. Kimura, N. Imae, A. Yamaguchi, H. Haramura, H. Kojima Polar Science doi.org/10.1016/j.polar.2017.12.001 Available online 5 December 2017 LINK “Bulk chemical compositions of meteorites were traditionally analyzed by wet chemical analysis, and NIPR has data…
Ruthenium isotope fractionation in protoplanetary coresOPEN ACCESS
T. Hopp, M. Fischer-Gödde, T. Kleine Geochimica et Cosmochimica Acta In Press, Accepted Manuscript, Available online 5 December 2017 LINK (OPEN ACCESS) “Mass-dependent Ru isotope variations (δ102/99Ru) and Ru concentrations were determined for 35 magmatic…
A Hibonite-Pyroxene Spherule in Allan Hills 77307 (CO3.03): Petrography and MineralogyOPEN ACCESS
Ritesh Kumar Mishra PDF (OPEN ACCESS) “Hibonite-pyroxene spherules are an extremely rare kind of refractory inclusion that show a wide range of exotic isotopic properties despite their defining similarity and simplicity in morphology and mineralogy….
Percolative core formation in planetesimals enabled by hysteresis in metal connectivity
Soheil Ghanbarzadeh, Marc A. Hesse, and Maša Prodanović PNAS 2017 ; published ahead of print December 4, 2017 doi: 10.1073/pnas.1707580114 LINK “Significance It has long been thought that percolative core formation is prevented by high…
Heterogeneous delivery of silicate and metal to the Earth by large planetesimalsOPEN ACCESS
S. Marchi, R. M. Canup & R. J. Walker Nature Geoscience (2017) doi:10.1038/s41561-017-0022-3 Published online: 04 December 2017 LINK (OPEN ACCESS) “After the Moon’s formation, Earth experienced a protracted bombardment by leftover planetesimals. The mass…
Calibration-free quantitative elemental analysis of meteor plasma using reference laser-induced breakdown spectroscopy of meteorite samples
Martin Ferus, Jakub Koukal, Libor Lenza, Jiri Srba, Petr Kubelik, Vojtech Laitl, Ekaterina M. Zanozina, Pavel Vana, Tereza Kaiserova, Antonin Knizek, Paul Rimmer, Elias Chatzitheodoridis, and Svatopluk Civid A&A, Forthcoming article Accepted: 03 December 2017…
Petrogenesis of Alta’ameem meteorite (Iraq) inferred from major, trace, REE and PGE+Au content
Yawooz A.Kettanah, Sabah A.Ismail Journal of African Earth Sciences 139, 260-274 https://doi.org/10.1016/j.jafrearsci.2017.11.015 LINK “Highlights • Alta’ameem Meteorite (AM) is a LL5 chondrite that hit northern Iraq on 1977. • Th AM is studied petrographically, mineralogically…
Extraterrestrial formation of oldhamite and portlandite through thermal metamorphism of calcite in the Sutter’s Mill carbonaceous chondrite
Christopher W. Haberle; Laurence A.J. Garvie American Mineralogist (2017) 102 (12): 2415-2421. DOI:https://doi.org/10.2138/am-2017-6180 Published: December 01, 2017 LINK “The CM and CI carbonaceous chondrites are typically dominated by phyllosilicates with variable proportions of tochilinite, anhydrous…