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The catastrophic break-up of the ureilite parent body: Modeling constraints on the debris size Meteorit. Planet. Sci. (IF 2.2) Pub Date : 2024-03-12 Andrea Patzer, Julia Kowalski, Tommaso Di Rocco, Andreas Pack
The ureilite parent body (UPB) was, in all likelihood, completely broken apart when hit by another object early in its history and reassembled into daughter bodies. We here present a study tailored to constrain the dimensions of the impact debris produced in the catastrophic disruption. Using a customized Python code to simulate the thermal evolution of the UPB fragments, we compared the FeO profiles
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Wetting property of Fe-S melt in solid core: Implication for the core crystallization process in planetesimals Meteorit. Planet. Sci. (IF 2.2) Pub Date : 2024-03-10 Shiori Matsubara, Hidenori Terasaki, Takashi Yoshino, Satoru Urakawa, Daisuke Yumitori
In differentiated planetesimals, the liquid core starts to crystallize during secular cooling, followed by the separation of liquid–solid phases in the core. The wetting property between liquid and solid iron alloys determines whether the core melts are trapped in the solid core or they can separate from the solid core during core crystallization. In this study, we performed high-pressure experiments
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Multifactor characterization of space weathering among siliceous asteroids. I: Grain size effects Meteorit. Planet. Sci. (IF 2.2) Pub Date : 2024-03-05 Eric M. MacLennan, Joshua P. Emery, Lucas M. McClure, Michael P. Lucas, Sean S. Lindsay, Noemi Pinilla-Alonso
Spacecraft missions to asteroids have revealed surfaces that have variations in albedo and spectral properties. Such variations are also detected across the asteroid population with ground-based observations, and are controlled by the physical characteristics of the regolith and by processes such as space weathering. Here, we investigate how space weathering and regolith grain size influence the spectra
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Space weathering, grain size, and metamorphic heating effects on ordinary chondrite spectral reflectance parameters Meteorit. Planet. Sci. (IF 2.2) Pub Date : 2024-03-05 Eric M. MacLennan, Joshua P. Emery, Michael P. Lucas, Lucas M. McClure, Sean S. Lindsay
The exposure to irradiation from high-energy particles alters the reflectance properties of asteroid surfaces and is referred to as space weathering. This process leads to an increase in spectral slope in visible and near-infrared wavelengths. However, changes in the regolith particle size, which can vary dramatically among the asteroid population, are known to influence the spectral properties of
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Chondrule formation during low-speed collisions of planetesimals: A hybrid splash–flyby framework Meteorit. Planet. Sci. (IF 2.2) Pub Date : 2024-02-28 William Herbst, James P. Greenwood
Chondrules probably formed during a small window of time ~1–4 Ma after CAIs, when most solid matter in the asteroid belt was already in the form of km-sized planetesimals. They are unlikely, therefore, to be “building blocks” of planets or abundant on asteroids, but more likely to be a product of energetic events common in the asteroid belt at that epoch. Laboratory experiments indicate that they could
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Icy ocean worlds, plumes, and tasting the water Meteorit. Planet. Sci. (IF 2.2) Pub Date : 2024-02-23 M. J. Burchell, P. J. Wozniakiewicz
This paper considers how space missions that fly through the plumes known, or suspected, to erupt naturally from some icy ocean worlds (IOW), such as Enceladus, or that aim to intercept icy ejecta from impact cratering processes on such bodies can sample the water and ice within the plumes. The mechanics of how grains (either in the plumes or the ejecta) would interact with a passing spacecraft (i
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Forsteritic olivine in EH (enstatite) chondrite meteorites: A record of nebular, metamorphic, and crystal-lattice diffusion effects Meteorit. Planet. Sci. (IF 2.2) Pub Date : 2024-02-20 Seann J. McKibbin, Lutz Hecht, Christina Makarona, Matthew Huber, Hermann Terryn, Philippe Claeys
The occurrence of forsteritic olivine in EH enstatite chondrites is indicative of bulk disequilibrium. In MgO-rich magmatic systems, forsterite can either crystallize as a liquidus phase or be produced during peritectic melting of enstatite. Because diffusion of divalent cations through forsterite is relatively rapid, it records peak melting (i.e., chondrule-forming events) and is also sensitive to
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Mechanical properties of minerals in lunar and HED meteorites from nanoindentation testing: Implications for space mining Meteorit. Planet. Sci. (IF 2.2) Pub Date : 2024-02-17 Eloy Peña-Asensio, Josep M. Trigo-Rodríguez, Jordi Sort, Jordi Ibáñez-Insa, Albert Rimola
This study analyzes the mechanical and elemental properties of lunar meteorites DHOFAR 1084, JAH 838, NWA 11444, and HED meteorite NWA 6013. Utilizing microscale rock mechanics experiments, that is, nanoindentation testing, this research reveals significant heterogeneity in both mechanical and elemental attributes across the mineral samples. Olivines, pyroxene, feldspar, and spinel demonstrate similar
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Highly siderophile element abundances and 187Re-187Os systematics in the Tafassasset carbonaceous-like primitive achondrite Meteorit. Planet. Sci. (IF 2.2) Pub Date : 2024-02-19 Robert W. Nicklas, Kathryn G. Gardner-Vandy, James M. D. Day
Highly siderophile elements (HSE) strongly partition into metal phases over silicate minerals and so offer important constraints on nebular and core formation processes acting on early planetesimals. Abundances of the HSE are also an important tool for constraining relationships between metal-rich meteorites. The first bulk rock and in situ HSE abundance and 187Re-187Os data are reported for the ungrouped
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Pairing relations within CO3 chondrites recovered at the Dominion Range and Miller Range, Transantarctic mountains: Constraints from chondrule olivines, noble gas, and H, C, N bulk and isotopic compositions Meteorit. Planet. Sci. (IF 2.2) Pub Date : 2024-02-13 K. Righter, C. M. O'D. Alexander, D. I. Foustoukos, L. M. Eckart, C. A. K. Mertens, H. Busemann, C. Maden, J. Schutt, C. E. Satterwhite, R. P. Harvey, K. Pando, J. Karner
The Dominion Range (DOM) and Miller Range (MIL) dense collection areas (DCAs) have yielded more than 20 and 200 CO3 chondrites (carbonaceous chondrites of the Ornans chemical group), respectively, over multiple field seasons. Several samples have exhibited primitive characteristics and have been the focus of interest. With so many CO3s recovered from this area, a natural question is if there are multiple
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Oxygen isotopic compositions of fresh rooftop micrometeorites from the Budel collection—Insights into the contemporary cosmic dust flux Meteorit. Planet. Sci. (IF 2.2) Pub Date : 2024-02-06 Guido Jonker, Flore van Maldeghem, Matthias van Ginneken, Lisa Krämer Ruggiu, Steven Goderis
Cosmic dust particles originate from a wide variety of solar system and interstellar objects, including sources not identified among meteorite collections. Particles that survive atmospheric entry are retrieved on the Earth's surface as micrometeorites. The recovery of these micrometeorites has recently advanced to rooftop sites. Here, we present the results of an extensive isotopic study on this type
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14C and 14C-10Be terrestrial age dating system for meteorites—New data for four recently fallen meteorites Meteorit. Planet. Sci. (IF 2.2) Pub Date : 2024-02-03 Mohammad Tauseef, Ingo Leya, Jérôme Gattacceca, Beda Hofmann, Sönke Szidat, Régis Braucher
We perform a systematic and detailed study of the 14C and 14C-10Be dating systems for meteorite terrestrial ages. Physical model calculations indicate that neither the 14C production rates nor the 14C/10Be production rate ratios are constant enough to be reasonably approximated by average values. By using simple averages, one introduces a significant size-dependent bias into the database for meteorite
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Chemical compositions of Fe-rich relict olivines from cosmic spherules, understanding their links with ordinary and carbonaceous chondrites Meteorit. Planet. Sci. (IF 2.2) Pub Date : 2024-02-06 D. Fernandes, N. G. Rudraswami, M. Pandey, V. P. Singh
Fe-rich relict olivine grains are found in a small percentage of cosmic spherules, which are studied here to determine the nature of their precursors. We examined 128 Fe-rich relict olivine grains with Fa >10 mol% from 53 cosmic spherules of different types collected from Antarctica (Antarctica micrometeorites [AMM]) and deep-sea sediments (DSS) of the Indian Ocean. Fe-rich olivines identified in cosmic
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Unusual sources of fossil micrometeorites deduced from relict chromite in the small size fraction in ~467 Ma old limestone Meteorit. Planet. Sci. (IF 2.2) Pub Date : 2024-02-02 Philipp R. Heck, Birger Schmitz, Xenia Ritter, Surya S. Rout, Noriko T. Kita, Céline Defouilloy, Katarina Keating, Kevin Eisenstein, Fredrik Terfelt
Extraterrestrial chrome spinel and chromite extracted from the sedimentary rock record are relicts from coarse micrometeorites and rarely meteorites. They are studied to reconstruct the paleoflux of meteorites to the Earth and the collisional history of the asteroid belt. Minor element concentrations of Ti and V, and oxygen isotopic compositions of these relict minerals were used to classify the meteorite
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Geochemical biosignature formation in experimental Martian fluvio-lacustrine and simulated evaporitic settings Meteorit. Planet. Sci. (IF 2.2) Pub Date : 2024-02-01 Simone Cogliati, Michael C. Macey
To assess whether life existed on Mars, it is crucial to identify geochemical biosignatures that are relevant to specific Martian environments. In this paper, thermochemical modeling was used to investigate fluid chemistries and secondary minerals that would have evolved biotically over geological time scales in Martian fluvio-lacustrine and evaporitic settings, and that could be used as potential
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Quantification of bulk elemental composition for C-type asteroid Ryugu samples with nondestructive elemental analysis using muon beam Meteorit. Planet. Sci. (IF 2.2) Pub Date : 2024-01-31 Kazuhiko Ninomiya, Takahito Osawa, Kentaro Terada, Taiga Wada, Shunsaku Nagasawa, I-Haun Chiu, Tomoki Nakamura, Tadayuki Takahashi, Yasuhiro Miyake, M. Kenya Kubo, Soshi Takeshita, Akihiro Taniguchi, Izumi Umegaki, Shin Watanabe, Toshiyuki Azuma, Miho Katsuragawa, Takahiro Minami, Kazumi Mizumoto, Koichiro Shimomura, Shin'ichiro Takeda, Tomoyo Morita, Mizuha Kikuiri, Kana Amano, Eiichi Kagawa, Yoshihiro
Samples from asteroid Ryugu, brought back by asteroid explorer Hayabusa2, are important for investigating the origin and evolution of the solar system. Here, we report the elemental compositions of a 123-mg Ryugu sample determined with a nondestructive muon elemental analysis method. This method is a powerful tool for determining bulk chemical composition, including light elements such as C, N, and
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The Martian crustal field recorded in Antarctic meteorite Grove Mountains 020090 Meteorit. Planet. Sci. (IF 2.2) Pub Date : 2024-01-31 Ting Cao, Huapei Wang, Shaochen Hu, Kaixian Qi
We present the first rock magnetic and paleomagnetic analyses of the Martian meteorite Grove Mountains (GRV) 020090, a suitable candidate for paleomagnetic study due to its low degree of weathering and shock metamorphism. Petrological and rock magnetic investigation indicates that pyrrhotite is the dominant magnetic mineral in GRV 020090, where it occurs as a primary phase without significant shock
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Polygonal impact craters on Ganymede Meteorit. Planet. Sci. (IF 2.2) Pub Date : 2024-01-30 Namitha Rose Baby, Thomas Kenkmann, Katrin Stephan, Roland Wagner
Polygonal impact craters (PICs) are unique geological features observed on various planetary bodies and constitute a small percentage of the impact crater population. This study focuses on PICs on Ganymede, where no such craters have been investigated so far. Here we present the distribution of PICs, examine their morphological characteristics, investigate the causes for their polygonal shapes, and
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Subtype 3.0 chondrites: Petrologic classification criteria Meteorit. Planet. Sci. (IF 2.2) Pub Date : 2024-01-29 M. Kimura, M. K. Weisberg, A. Yamaguchi
Type 3 chondrites are subdivided into 3.0–3.9. Subtype 3.0 chondrites nearly preserve all of their primitive features. Many criteria have been proposed to distinguish such primitive chondrites. Here, we compiled mineral data and reconsider the petrologic classification criteria for subtype 3.0. Chondrites are classified into subtypes by the minor element distribution of olivine and textural and chemical
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Hydrogen in magnetite from asteroid Ryugu Meteorit. Planet. Sci. (IF 2.2) Pub Date : 2024-01-26 J. Aléon, S. Mostefaoui, H. Bureau, D. Vangu, H. Khodja, K. Nagashima, N. Kawasaki, Y. Abe, C. M. O'D. Alexander, S. Amari, Y. Amelin, K. Bajo, M. Bizzarro, A. Bouvier, R. W. Carlson, M. Chaussidon, B.-G. Choi, N. Dauphas, A. M. Davis, T. Di Rocco, W. Fujiya, R. Fukai, I. Gautam, M. K. Haba, Y. Hibiya, H. Hidaka, H. Homma, P. Hoppe, G. R. Huss, K. Ichida, T. Iizuka, T. R. Ireland, A. Ishikawa, S. Itoh
In order to gain insights on the conditions of aqueous alteration on asteroid Ryugu and the origin of water in the outer solar system, we developed the measurement of water content in magnetite at the micrometer scale by secondary ion mass spectrometry (NanoSIMS) and determined the H and Si content of coarse-grained euhedral magnetite grains (polyhedral magnetite) and coarse-grained fibrous (spherulitic)
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A sample preparation guide for clay-rich carbonaceous chondrites Meteorit. Planet. Sci. (IF 2.2) Pub Date : 2024-01-26 Bennett J. K. Wilson, Veronica E. Di Cecco, Laurence A. J. Garvie, Kimberly T. Tait, Michael G. Daly
The matrix of the C2-ungrouped Tarda meteorite contains abundant smectite minerals that swell and crumble when exposed to polar liquids, causing the sample to rapidly slake. This phenomenon presents a serious challenge when polishing the meteorite, as common polishing liquids used on carbonaceous chondrites, such as water, ethanol, ethylene glycol, and isopropyl alcohol, are polar and will cause the
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TiO2 II: The high-pressure Zr-free srilankite endmember in impact rocks Meteorit. Planet. Sci. (IF 2.2) Pub Date : 2024-01-26 F. Campanale, E. Mugnaioli, L. Folco, P. Parlanti, M. Gemmi
TiO2II, a high-pressure polymorph of titanium dioxide, is a diagnostic indicator of shock metamorphism in impact rocks. Due to its typical micro-to-nanometer scale, there are no ab initio structure solutions of natural TiO2II, thereby generating uncertainty about its crystal structure and its known similarity with srilankite (Ti0.67,Zr0.33)O2. Nanoscale electron diffraction investigation of TiO2II
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Electron microscopy observations of the diversity of Ryugu organic matter and its relationship to minerals at the micro- to nano-scale Meteorit. Planet. Sci. (IF 2.2) Pub Date : 2024-01-25 Rhonda M. Stroud, Jens Barosch, Lydie Bonal, Katherine Burgess, George D. Cody, Bradley T. De Gregorio, Luke Daly, Emmanuel Dartois, Elena Dobrică, Jean Duprat, Cecile Engrand, Dennis Harries, Minako Hashiguchi, Hope Ishii, Yoko Kebukawa, A. David Kilcoyne, Falko Langenhorst, Martin R. Lee, Larry R. Nittler, Eric Quirico, Taiga Okumura, Laurent Remusat, Scott Sandford, Hikaru Yabuta, Masanao Abe, Neyda
Transmission electron microscopy analyses of Hayabusa2 samples show that Ryugu organic matter exhibits a range of morphologies, elemental compositions, and carbon functional chemistries consistent with those of carbonaceous chondrites that have experienced low-temperature aqueous alteration. Both nanoglobules and diffuse organic matter are abundant. Non-globular organic particles are also present,
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The Vaca Muerta mesosiderite: The path under which Fe-Ni alloy ±C phases could have formed Meteorit. Planet. Sci. (IF 2.2) Pub Date : 2024-01-25 M. E. Varela, S.-L. Hwang, P. Shen, L. N. Garcia, M. Saavedra, T. Maruoka, M. Bose
The combined SEM and TEM studies on the metal (Fe-Ni alloy ±C) portion of the Vaca Muerta mesosiderite reveal structural and compositional evidence at micro to nanoscale, which sheds light on the solidification of taenite + graphite as a cement, and later solid-state precipitation process for the kamacite formation as grain boundary allotriomorph. Besides, it is proposed that the graphite veinlets
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How many Vesta-like bodies existed in the asteroid belt? Meteorit. Planet. Sci. (IF 2.2) Pub Date : 2024-01-24 T. H. Burbine, R. C. Greenwood, B. Zhang, P. C. Buchanan
Asteroid 4 Vesta is typically thought to be the parent body of the HED (howardite, eucrite, and diogenite) meteorites due to spectral similarities. The discovery of asteroids far from Vesta with HED-like spectra like (1459) Magnya and HED-like meteorites (e.g., NWA 011) with anomalous oxygen isotopic values compared to typical HEDs is evidence that other Vesta-like bodies formed. We broadly define
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The lithologic diversity of the Moon recorded in lunar meteorites Northwest Africa 7611 and 10480 Meteorit. Planet. Sci. (IF 2.2) Pub Date : 2024-01-23 Haijun Cao, Jian Chen, Chengxiang Yin, Xiaohui Fu, Zongcheng Ling, Xiaochao Che
Northwest Africa (NWA) 7611/10480 are lunar regolith breccia meteorites, composed of mineral fragments and various clasts including mare basalts, volcanic glasses, gabbroic lithologies, and a diverse variety of highland materials (ferroan anorthosite, Mg-suite, magnesian anorthosite, and alkali suite rocks) as well as different subvarieties of impact melt breccia. The Apollo two-component mixing model
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Strewn field, mineralogy, and petrology of Al Haggounia 001: A unique enstatite chondrite Meteorit. Planet. Sci. (IF 2.2) Pub Date : 2024-01-21 M. H. Leili, H. Chennaoui Aoudjehane, B. Devouard, P. Rochette, J. Gattacceca, L. Folco, M. Gemelli, I. Baziotis
In this work, we investigate macroscopic characteristics, magnetic susceptibility, mineralogy, and mineral composition of Al Haggounia 001. The samples were collected during eight field missions in the period between 2015 and 2019. In the strewn field of about 65 km in length, the specimens are found either on the surface or shallowly buried in loose sediments, which rules out the previous suggestions
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The fate of primary iron sulfides in the CM1 carbonaceous chondrites: Effects of advanced aqueous alteration on primary components Meteorit. Planet. Sci. (IF 2.2) Pub Date : 2024-01-21 S. A. Singerling, C. M. Corrigan, A. J. Brearley
We have carried out a SEM-EPMA-TEM study to determine the textures and compositions of relict primary iron sulfides and their alteration products in a suite of moderately to heavily altered CM1 carbonaceous chondrites. We observed four textural groups of altered primary iron sulfides: (1) pentlandite+phyllosilicate (2P) grains, characterized by pentlandite with submicron lenses of phyllosilicates;
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Nucleosynthetic isotope variations in chondritic meteorites and their relationship to bulk chemistry Meteorit. Planet. Sci. (IF 2.2) Pub Date : 2024-01-17 Herbert Palme, Klaus Mezger
The relationship of mass-independent stable isotope anomalies with the chemistry of chondritic meteorites provides constraints on mixing and fractionation processes in the early solar nebula. The present study emphasizes the strong correlation of nucleosynthetic isotope variations among ordinary chondrites (OC), enstatite chondrites (EC), Earth, CI-chondrites, and Ca, Al-rich inclusions (CAI) in ε50Ti
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Focused-beam X-ray fluorescence and diffraction microtomographies for mineralogical and chemical characterization of unsectioned extraterrestrial samples Meteorit. Planet. Sci. (IF 2.2) Pub Date : 2024-01-17 Antonio Lanzirotti, Stephen R. Sutton, Matthew Newville, Adrian Brearley, Oliver Tschauner
This study describes the application of new synchrotron X-ray fluorescence (XRF) and diffraction (XRD) microtomographies for the 3-D visualization of chemical and mineralogical variations in unsectioned extraterrestrial samples. These improved methods have been applied to three compositionally diverse chondritic meteorite samples that were between 300 and 400 μm in diameter, including samples prepared
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Molecular distribution and 13C isotope composition of volatile organic compounds in the Murchison and Sutter's Mill carbonaceous chondrites Meteorit. Planet. Sci. (IF 2.2) Pub Date : 2024-01-16 José C. Aponte, Frédéric Séguin, Ariel J. Siguelnitzky, Jason P. Dworkin, Jamie E. Elsila, Daniel P. Glavin, Harold C. Connolly, Dante S. Lauretta
Volatile organic compounds (VOCs) are carbon-containing chemicals that may evaporate rapidly at room temperature and standard pressure. Such organic compounds can be preserved inside carbonaceous chondrite matrices. However, unlike meteoritic soluble organic matter (SOM) and insoluble organic matter (IOM), VOCs are typically lost (at least in part) during sample processing (meteorite crushing) and
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An overview of the new Moroccan regulation on collection and export of meteorites: A geoheritage to promote and preserve Meteorit. Planet. Sci. (IF 2.2) Pub Date : 2024-01-13 Hasnaa Chennaoui Aoudjehane
Morocco is known for the high number of meteorites collected in its territory, including finds and falls. This is explained by the large size of the Moroccan Sahara, the guarantee of security in this desert, and the large community of well-trained Moroccan hunters and nomads who roam through it. Despite this richness, most meteorites collected in Morocco are sold abroad and exported. The exportation
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Curation protocol of Phobos sample returned by Martian Moons eXploration Meteorit. Planet. Sci. (IF 2.2) Pub Date : 2024-01-11 Ryota Fukai, Tomohiro Usui, Wataru Fujiya, Yoshinori Takano, Ken-ichi Bajo, Andrew Beck, Enrica Bonato, Nancy L. Chabot, Yoshihiro Furukawa, Hidenori Genda, Yuki Hibiya, Fred Jourdan, Thorsten Kleine, Mizuho Koike, Moe Matsuoka, Yayoi N. Miura, Frédéric Moynier, Ryuji Okazaki, Sara S. Russell, Hirochika Sumino, Michael E. Zolensky, Haruna Sugahara, Shogo Tachibana, Kanako Sakamoto, Masanao Abe, Yuichiro
Japan Aerospace Exploration Agency's Martian Moons eXploration (MMX) mission will launch a spacecraft in 2024 to return samples from Phobos in 2029. Curatorial work for the returned Phobos samples is critical for the sample allocation without degrading the sample integrity and subsequent sample analysis that will provide new constraints on the origin of Phobos and the evolution of the circum-Mars environment
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Analytical method for stable background reduction for Raman spectra of carbon-containing meteorite and terrestrial samples suffering from intense fluorescence Meteorit. Planet. Sci. (IF 2.2) Pub Date : 2024-01-10 Aruto Kashima, Shu-hei Urashima, Hiroharu Yui
Chemical states of carbon in terrestrial (meta) sediments and carbonaceous chondrites gather attention as a geothermometer. As a nondestructive analytical method, Raman spectroscopy has been widely used to study their electronic properties, crystallinity, and structural defects through so-called D and G bands. For the analysis of Raman spectra, a common problem is coexistence of a fluorescence background
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In situ investigation of an organic micro-globule and its mineralogical context within a Ryugu “sand” grain Meteorit. Planet. Sci. (IF 2.2) Pub Date : 2024-01-08 Van T. H. Phan, Pierre Beck, Rolando Rebois, Eric Quirico, Takaaki Noguchi, Toru Matsumoto, Akira Miyake, Yohei Igami, Mitsutaka Haruta, Hikaru Saito, Satoshi Hata, Yusuke Seto, Masaaki Miyahara, Naotaka Tomioka, Hope A. Ishii, John P. Bradley, Kenta K. Ohtaki, Elena Dobrică, Hugues Leroux, Corentin Le Guillou, Damien Jacob, Francisco de la Peña, Sylvain Laforet, Maya Marinova, Falko Langenhorst, Dennis
The Hayabusa2 mission from the Japan Aerospace Exploration Agency (JAXA) returned to the Earth samples of carbonaceous asteroid (162173) Ryugu. This mission offers a unique opportunity to investigate in the laboratory samples from a C-type asteroid, without physical or chemical alteration by the terrestrial atmosphere. Here, we report on an investigation of the mineralogy and the organo-chemistry of
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Four-dimensional-STEM analysis of the phyllosilicate-rich matrix of Ryugu samples Meteorit. Planet. Sci. (IF 2.2) Pub Date : 2024-01-05 Bahae-eddine Mouloud, Damien Jacob, Francisco de la Peña, Maya Marinova, Corentin Le Guillou, Jean-Christophe Viennet, Sylvain Laforet, Hugues Leroux, Adrien Teurtrie, Takaaki Noguchi, Toru Matsumoto, Akira Miyake, Yohei Igami, Mitsutaka Haruta, Hikaru Saito, Satoshi Hata, Yusuke Seto, Masaaki Miyahara, Naotaka Tomioka, Hope A. Ishii, John P. Bradley, Kenta K. Ohtaki, Elena Dobrica, Falko Langenhorst
Ryugu asteroid grains brought back to the Earth by the Hayabusa2 space mission are pristine samples containing hydrated minerals and organic compounds. Here, we investigate the mineralogy of their phyllosilicate-rich matrix with four-dimensional scanning transmission electron microscopy (4D-STEM). We have identified and mapped the mineral phases at the nanometer scale (serpentine, smectite, pyrrhotite)
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Assessing the accuracy of phase equilibrium software in reproducing the liquidus multiple saturation conditions of lunar and Martian basalt compositions Meteorit. Planet. Sci. (IF 2.2) Pub Date : 2024-01-05 Daniel F. Astudillo Manosalva, Stephen M. Elardo
Accurate computational modeling allows the use of software as a first approach to some petrological problems that typically require experimentation, but most programs have not yet been fully tested for accuracy with lunar or Martian melt compositions. The programs pMELTS, MAGPOX, and Perple_X stand out for phase equilibrium modeling, as their calibrations include experiments of lunar compositions or
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Overview of the Lost Meteorites of Antarctica field campaigns Meteorit. Planet. Sci. (IF 2.2) Pub Date : 2024-01-05 K. H. Joy, A. R. D. Smedley, J. L. MacArthur, W. van Verre, L. A. Marsh, M. Rose, T. A. Harvey, R. Tartèse, R. H. Jones, I. D. Abrahams, J. W. Wilson, A. J. Peyton, L. Gerrish, J. Baum, G. Raymond, R. Taylor, G. W. Evatt
The Lost Meteorites of Antarctica project was the first UK-led Antarctic meteorite recovery expedition. The project has successfully confirmed two new high-density meteorite stranding zones in the Hutichison Icefield and Outer Recovery Icefields areas and investigated the geology of three previously unvisited Antarctic nunataks (Turner Nunatak, Pillinger Nunatak, Halliday Nunatak). The project undertook
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Dense collection areas and terrestrial alteration of meteorites in the Atacama Desert Meteorit. Planet. Sci. (IF 2.2) Pub Date : 2024-01-04 Gabriel A. Pinto, Adrien Tavernier, Jérôme Gattacceca, Alexandre Corgne, Millarca Valenzuela, Béatrice Luais, Laura Flores, Felipe Olivares, Yves Marrocchi
In the last 15 years, more than 2700 meteorites have been recovered and officially classified from the Atacama Desert. Although the number of meteorites collected in the Atacama has risen, the physical and climatic properties of the dense collection areas (DCAs) have not been fully characterized. In this article, we compiled the published data of all classified meteorites found in the Atacama Desert
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Investigating the impact of x-ray computed tomography imaging on soluble organic matter in the Murchison meteorite: Implications for Bennu sample analyses Meteorit. Planet. Sci. (IF 2.2) Pub Date : 2023-12-15 Daniel P. Glavin, Scott A. Eckley, José C. Aponte, Eve L. Berger, Aaron S. Burton, Jason P. Dworkin, Jamie E. Elsila, Frank T. Ferguson, Yoshihiro Furukawa, Heather V. Graham, Toshiki Koga, Michael Liss, Hannah L. McLain, Hiroshi Naraoka, Yasuhiro Oba, Eric T. Parker, Kevin Righter, Philippe Schmitt-Kopplin, Danielle N. Simkus, Yoshinori Takano, Harold C. Connolly, Dante S. Lauretta
X-ray computed tomography (XCT) is a valuable reconnaissance tool for three-dimensional imaging and identification of distinct lithologies in extraterrestrial samples. It will be used as part of the preliminary examination of samples returned from asteroid (101955) Bennu by the Origins, Spectral Interpretation, Resource Identification, and Security–Regolith Explorer (OSIRIS-REx) mission. However, it
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3-D geophysical modeling of a buried, simple impact crater: Holleford impact structure, Ontario, Canada Meteorit. Planet. Sci. (IF 2.2) Pub Date : 2023-12-15 Mary-Helen Armour, Joseph I. Boyce, Zackary Shulman, David R. Zilkey
Holleford Crater is a deeply buried, 2.35 km diameter late Proterozoic-early Cambrian (550 ± 50 Ma) simple impact crater located in southeastern Ontario, Canada. Exploration drilling in the 1950–60s indicated a >450 m deep, simple impact structure with an infill stratigraphy of Cambro-Ordovician clastic and carbonate sediments and a −2.2 mGal gravity anomaly. We conducted new ground-based geophysical
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The first U–Pb age for shocked zircon from the Mien impact structure, Sweden, and implications for metamictization-induced zircon texture formed during impact events Meteorit. Planet. Sci. (IF 2.2) Pub Date : 2023-12-15 Maria Herrmann, Gavin G. Kenny, Josefin Martell, Martin J. Whitehouse, Carl Alwmark
Shocked zircon from impactites from the Mien impact structure, Sweden, has been investigated with the aim to date the impact event and correlate the degree of U–Pb age resetting with shock-related microtextures. In situ U–Pb spot isotope analyses of granular and microporous–granular zircon grains from the impact melt rocks give an age of 120.0 ± 1.0 Ma. This essentially confirms the previous best estimate
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Logoisk impact structure, Belarus: Shock transformation of zircon Meteorit. Planet. Sci. (IF 2.2) Pub Date : 2023-12-14 L. I. Glazovskaya, V. D. Shcherbakov, A. A. Piryazev
The 17 km diameter, 30 Ma old Logoisk structure in Belarus (54°12′ N, 27°48′ E) was intensively drilled within the crater area. We summarize geological structure and petrologic information previously published mostly in Russian and describe shock deformation of zircon for the first time. The shock deformation features of zircon in the Logoisk suevite include the transition to reidite, the formation
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Analysis of layered boulders on asteroid (101955) Bennu and their implications for fluid flow on the parent body Meteorit. Planet. Sci. (IF 2.2) Pub Date : 2023-12-14 K. Ishimaru, D. S. Lauretta
The observation of carbonate veins on asteroid Bennu supports the idea that large-scale water flow may have occurred in carbonaceous asteroids in the early solar system. We identified and analyzed 11 boulders with layered structures on asteroid Bennu's surface using high-resolution (centimeter-scale) image and altimetry data obtained by the OSIRIS-REx mission. The boulders' linear layer boundaries
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Northwest Africa 13669, a reequilibrated nakhlite from a previously unsampled portion of the nakhlite igneous complex Meteorit. Planet. Sci. (IF 2.2) Pub Date : 2023-12-13 Sierra R. Ramsey, Amanda M. Ostwald, Arya Udry, Evan O'Neal, James M. D. Day, Zoë Wilbur, Jessica J. Barnes, Sammy Griffin
Northwest Africa (NWA) 13669 is a recently found nakhlite and here, we use 2-D and 3-D mineralogy and texture, quantitative textural analysis of pyroxene, bulk rock and mineral major and trace element compositions, and melt inclusion analyses to assess its formation and emplacement. Using these combined results, we determine that NWA 13669 is derived from a depleted mantle source common to nakhlites
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Neodymium-142 deficits and samarium neutron stratigraphy of C-type asteroid (162173) Ryugu Meteorit. Planet. Sci. (IF 2.2) Pub Date : 2023-12-07 Zachary A. Torrano, Michelle K. Jordan, Timothy D. Mock, Richard W. Carlson, Ikshu Gautam, Makiko K. Haba, Tetsuya Yokoyama, Yoshinari Abe, Jérôme Aléon, Conel Alexander, Sachiko Amari, Yuri Amelin, Ken-ichi Bajo, Martin Bizzarro, Audrey Bouvier, Marc Chaussidon, Byeon-Gak Choi, Nicolas Dauphas, Andrew M. Davis, Tommaso Di Rocco, Wataru Fujiya, Ryota Fukai, Yuki Hibiya, Hiroshi Hidaka, Hisashi Homma
We report Nd and Sm isotopic compositions of four samples of Ryugu returned by the Hayabusa2 mission, including “A” (first touchdown) and “C” (second touchdown) samples, and several carbonaceous chondrites to evaluate potential genetic relationships between Ryugu and known chondrite groups and track the cosmic ray exposure history of Ryugu. We resolved Nd and Sm isotopic anomalies in small (<20 ng
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Synchrotron x-ray diffraction for sealed Mars Sample Return sample tubes Meteorit. Planet. Sci. (IF 2.2) Pub Date : 2023-12-01 L. F. Adam, J. C. Bridges, C. C. Bedford, J. M. C. Holt, E. Rampe, M. Thorpe, K. Mason, R. C. Ewing
The joint NASA-ESA Mars sample return campaign aims to return up to 31 sample tubes containing drilled sedimentary and igneous cores and regolith. The titanium alloy tubes will initially still be sealed when they are retrieved. Several types of measurement will be carried out on sealed samples in the pre-basic characterization phase of scientific investigation. We show that powder x-ray diffraction
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Shocked quartz in sandstone from the buried Ilkurlka impact structure, Officer Basin, Western Australia Meteorit. Planet. Sci. (IF 2.2) Pub Date : 2023-11-29 Raiza R. Quintero, Aaron J. Cavosie, Sanna Alwmark, Peter W. Haines, Martin Danišík, Nicholas E. Timms, David Lim
The Ilkurlka structure is an ~12 km diameter buried circular aeromagnetic anomaly within the Officer Basin in Western Australia. Prior studies postulated a range of origins, including meteorite impact. We report the presence of pervasive deformation in the first drill cores from the structure. Brecciated sandstone and siltstone contain arrays of quartz grains with concussion fractures and rare shocked
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The nature of insoluble organic matter in Sutter's Mill and Murchison carbonaceous chondrites: Testing the effect of x-ray computed tomography and exploring parent body organic molecular evolution Meteorit. Planet. Sci. (IF 2.2) Pub Date : 2023-11-27 George D. Cody, Conel M. O'D. Alexander, Dionysis I. Foustoukos, Henner Busemann, Scott Eckley, Aaron S. Burton, Eve L. Berger, Michel Nuevo, Scott A. Sandford, Daniel P. Glavin, Jason P. Dworkin, Harold C. Connolly, Dante S. Lauretta
This study analyzed samples of the Murchison and Sutter's Mill carbonaceous chondrite meteorites in support of the future analysis of samples returned from the asteroid (10155) Bennu by the OSIRIS-REx (Origins, Spectral Interpretation, Resource Identification, and Security–Regolith Explorer) mission. Focusing specifically on the insoluble organic matter (IOM), this study establishes that a total of
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The impact history and prolonged magmatism of the angrite parent body Meteorit. Planet. Sci. (IF 2.2) Pub Date : 2023-11-27 B. G. Rider-Stokes, M. Anand, L. F. White, J. R. Darling, R. Tartèse, M. J. Whitehouse, I. Franchi, R. C. Greenwood, G. Degli-Alessandrini
As some of the oldest differentiated materials in our solar system, angrite meteorites can provide unique insights into the earliest stages of planetary evolution. However, the timing of planetary mixing, as evidenced by oxygen isotope variations in the quenched angrites, and the extent of magmatism on the angrite parent body (APB) remain poorly understood. Here, we report on microstructurally guided
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Jeptha Knob, Kentucky, a probable meteorite impact structure Meteorit. Planet. Sci. (IF 2.2) Pub Date : 2023-11-27 Andrew Schedl
Jeptha Knob is a deformed structure, 4.5 km in diameter, composed entirely of carbonate rocks in the stable craton of North America. At Jeptha Knob, conventional evidence of meteorite impact, shock metamorphism, has not been found. I used calcite twin analysis to test the hypothesis that Jeptha Knob is a meteorite impact crater. Calcite twinning gives differential stresses of >170 MPa in rocks that
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Olivine microstructure and thermometry in olivine-phyric shergottites Sayh al Uhaymir 005 and Dar al Gani 476 Meteorit. Planet. Sci. (IF 2.2) Pub Date : 2023-11-27 Eleanor S. Jennings, Peter Coull
Olivine-phyric shergottites are relatively young Martian meteorites that resemble primitive mantle-derived melts, so offer insight into the causes of recent magmatism on Mars. The Al-in-olivine geothermometer offers the potential to examine (near-)liquidus melt temperatures. However, the ubiquitous shock features in most Martian meteorites, caused by high-energy impacts, can change the structure and
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The Golden meteorite fall: Fireball trajectory, orbit, and meteorite characterization Meteorit. Planet. Sci. (IF 2.2) Pub Date : 2023-11-23 P. G. Brown, P. J. A. McCausland, A. R. Hildebrand, L. T. J. Hanton, L. M. Eckart, H. Busemann, D. Krietsch, C. Maden, K. Welten, M. W. Caffee, M. Laubenstein, D. Vida, F. Ciceri, E. Silber, C. D. K. Herd, P. Hill, H. Devillepoix, Eleanor K. Sansom, Martin Cupák, Seamus Anderson, R. L. Flemming, A. J. Nelson, M. Mazur, D. E. Moser, W. J. Cooke, D. Hladiuk, Barbara Malečić, Maja Telišman Prtenjak, R
The Golden (British Columbia, Canada) meteorite fall occurred on October 4, 2021 at 0534 UT with the first recovered fragment (1.3 kg) landing on an occupied bed. The associated fireball was recorded by numerous cameras permitting reconstruction of its trajectory and orbit. The fireball entered the atmosphere at a 54° angle from the horizontal at a speed of 18 km s−1. The fireball reached a peak brightness
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Nanophase magnetite in matrix of anomalous EL3 chondrite Northwest Africa (NWA) 8785 Meteorit. Planet. Sci. (IF 2.2) Pub Date : 2023-11-23 M. K. Weisberg, M. E. Zolensky, M. Kimura, K. T. Howard, D. S. Ebel, M. L. Gray, C. M. O'D. Alexander
NWA 8785 is a remarkable EL3 chondrite with a high abundance (~34 vol%) of an Fe-rich matrix. This is the highest matrix abundance known among enstatite chondrites (ECs) and more similar to the matrix abundances in some carbonaceous and Rumuruti chondrites. X-ray diffraction and TEM data indicate that the fine-grained portion of the NWA 8785 matrix consists of nanoscale magnetite mixed with a noncrystalline
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Geophysical and structural analyses of the Middlesboro impact structure, Kentucky, USA: Reactivation of a thrust detachment of the Appalachian foreland fold-and-thrust belt Meteorit. Planet. Sci. (IF 2.2) Pub Date : 2023-11-23 Lars Wihanto, Thomas Kenkmann
This paper reports on the Middlesboro impact structure (36°37′03″ N; 83°43′39″ W), a complex impact structure located in the Appalachian foreland fold-and-thrust belt of southeast Kentucky, USA. The structure forms a basin approximately 5.5 km in diameter exposing intensely deformed Pennsylvanian sediments. Based on field data, microstructural observation, and geophysical analyses we qualitatively
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Mineralogy and petrology of fine-grained samples recovered from the asteroid (162173) Ryugu Meteorit. Planet. Sci. (IF 2.2) Pub Date : 2023-11-22 Takaaki Noguchi, Toru Matsumoto, Akira Miyake, Yohei Igami, Mitsutaka Haruta, Hikaru Saito, Satoshi Hata, Yusuke Seto, Masaaki Miyahara, Naotaka Tomioka, Hope A. Ishii, John P. Bradley, Kenta K. Ohtaki, Elena Dobrică, Hugues Leroux, Corentin Le Guillou, Damien Jacob, Francisco de la Peña, Sylvain Laforet, Bahae-Eddine Mouloud, Maya Marinova, Falko Langenhorst, Dennis Harries, Pierre Beck, Thi H. V
Samples returned from the carbonaceous asteroid (162173) Ryugu by the Hayabusa2 mission revealed that Ryugu is composed of materials consistent with CI chondrites and some types of space weathering. We report detailed mineralogy of the fine-grained Ryugu samples allocated to our “Sand” team and report additional space weathering features found on the grains. The dominant mineralogy is composed of a