Meteoritics & Planetary Science最新文献

{"title":"Lunar exosphere dynamics at the north pole following Perseid 2009 meteoroid impacts","authors":"Alexey A. Berezhnoy,&nbsp;Maria Gritsevich,&nbsp;Ekaterina A. Feoktistova,&nbsp;Markku Nissinen,&nbsp;Yuri V. Pakhomov,&nbsp;Vladislav V. Shevchenko","doi":"10.1111/maps.70014","DOIUrl":"https://doi.org/10.1111/maps.70014","url":null,"abstract":"<p>Observations of the lunar exosphere provide valuable insights into dynamic processes affecting the Moon, such as meteoroid bombardment. The Chamberlain model was used to estimate the zenith column density and temperature of Na atoms on August 13/14, 2009 after the maximum of the Perseid meteor shower. The column density and temperature of Na atoms delivered to the lunar exosphere by slowly changing processes during the maximum of the Perseid meteor shower on August 12/13, 2009 are also estimated. Using the Chamberlain model and Monte Carlo simulations, expected ratios of line-of-sight column densities of Na atoms at three observed altitudes on August 12/13, 2009 are obtained. We attribute the heightened intensities of Na emission lines on August 12/13, 2009 to the onset of the third short-term peak in Perseid activity predicted by celestial mechanics. The best agreement between observations and theoretical models is achieved with a theoretical temperature of 3000 K for impact-produced Na atoms. This third peak of Perseids is estimated to have begun between 23:29 and 23:41 UT on August 12, 2009, lasting about 83 min, with a mass flux attributable to the Perseids ranging between 1.6 × 10⁻¹⁶ and 5 × 10⁻¹⁶ g cm⁻² s⁻¹. Additionally, depletion of Li content compared to Na content in the lunar exosphere is detected. We developed a model predicting Perseid meteoroid stream activity on the Moon, comparing it with performed spectral observations of the lunar exosphere. By modeling 25,000 years of comet 109P/Swift–Tuttle's orbits, we identified 175 cometary trails likely to have generated meteoroids near the Earth and the Moon during the Perseid 2009 meteor shower. Our results reveal annual maxima inducing filament trail structures, one of which aligned closely with the observed peak of the increased Na content in the lunar exosphere.</p>","PeriodicalId":18555,"journal":{"name":"Meteoritics & Planetary Science","volume":"60 8","pages":"1877-1893"},"PeriodicalIF":2.4,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144905337","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Luminescence characteristics of terrestrial Jarosite from Kachchh, India: A Martian analogue","authors":"Malika Singhal,&nbsp;Himela Moitra,&nbsp;Souvik Mitra,&nbsp;Aurovinda Panda,&nbsp;Jayant Kumar Yadav,&nbsp;D. Srinivasa Sarma,&nbsp;Devender Kumar,&nbsp;Naveen Chauhan,&nbsp;Saibal Gupta,&nbsp;Ashok Kumar Singhvi","doi":"10.1111/maps.70021","DOIUrl":"https://doi.org/10.1111/maps.70021","url":null,"abstract":"<p>In this study, naturally occurring jarosite samples from Kachchh, India (considered to be Martian analogue) were characterized using Fourier Transform Infrared Spectroscopy (FTIR), Cathodoluminescence–Energy Dispersive X-ray Spectroscopy (CL-EDXS), and Luminescence (thermoluminescence [TL], blue and infrared stimulated luminescence [BSL and IRSL]) methods. FTIR and CL-EDXS studies suggested that jarosite preserves its luminescence characteristics even after annealing the samples to 450°C. This facilitated luminescence studies (TL/BSL/IRSL) to assess the potential use of luminescence-dating methods to establish the chronology of jarosite formation or its transport. Jarosite exhibited TL, BSL, and IRSL signals with varied sensitivities. The TL glow curve of jarosite comprised glow peaks at 100, 150, 300, and 350°C, reproducible over multiple readout cycles. The least bleachable TL glow peak at 350°C is reduced to (1/e)^th of its glow peak intensity (i.e., 36%) with ~100 min of light exposure under a sunlamp. BSL and IRSL optical decay signals comprised three components. These signals exhibited athermal fading of g ~ 6%/decade, but pIRIR signal at 225°C showed a near zero fading. The saturation doses (2D₀) ranged from 700 Gy to 2600 Gy for different signals, which suggests a dating range of ~25 ka using a reported Martian total dose rate of 65 Gy/ka, primarily due to cosmic rays. Multiple TL glow peaks and their widely differing stability also offer promise to discern changes in cosmic ray fluxes over a century to millennia time scale through inverse modeling and laboratory experiments.</p>","PeriodicalId":18555,"journal":{"name":"Meteoritics & Planetary Science","volume":"60 8","pages":"1921-1938"},"PeriodicalIF":2.4,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144905338","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Northwest Africa 13489: A Strongly Metamorphosed Ungrouped Carbonaceous Chondrite","authors":"T. Cuppone,&nbsp;C. Carli,&nbsp;M. Casalini,&nbsp;A. Stephant,&nbsp;C. R. Greenwood,&nbsp;G. Pratesi","doi":"10.1111/maps.70007","DOIUrl":"https://doi.org/10.1111/maps.70007","url":null,"abstract":"<p>NWA 13489 is a meteorite that has been classified as a brachinite. Brachinites are olivine-rich primitive achondrites representing residual products after a variable degree of silicate melt extraction on a barely differentiated, noncarbonaceous asteroid. Nevertheless, NWA 13489 displays petrographic and mineralogical characteristics that are anomalous when compared with other meteorites of that group. The petrography and thermometric data of this sample are compatible with a high metamorphic grade origin. NWA 13489 results in intermediate between type 6 and 7 chondrites, with a thermal regime broadly straddling the FeNi-FeS eutectic and the onset of silicate melting, resembling other meteorites defined as primitive achondrites. Evidence from mineral chemistry, bulk trace element geochemistry, and oxygen and chromium isotope systematics shows a “carbonaceous” composition and, therefore, NWA 13489 is not a brachinite. Rather, together with an ungrouped chondrite (the NWA 11961 C3-ungrouped) and other ungrouped achondrites (the paired NWA 10503/10859), NWA 13489 supports the existence of a distinct carbonaceous-like meteorite grouplet.</p>","PeriodicalId":18555,"journal":{"name":"Meteoritics & Planetary Science","volume":"60 8","pages":"1861-1876"},"PeriodicalIF":2.4,"publicationDate":"2025-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/maps.70007","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144905470","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Asuka 12236 more primitive than Paris: Clues given by their Infrared and Raman micro-spectroscopy signatures","authors":"Zahia Djouadi,&nbsp;Vassilissa Vinogradoff,&nbsp;Zelia Dionnet,&nbsp;Coline Serra,&nbsp;Douchka Dimitrijevic,&nbsp;Alexandra Malnuit,&nbsp;Cateline Lantz,&nbsp;Philippe Claeys,&nbsp;Steven Goderis,&nbsp;Louis Le Sergeant d'Hendecourt","doi":"10.1111/maps.70017","DOIUrl":"https://doi.org/10.1111/maps.70017","url":null,"abstract":"<p>Carbonaceous chondrites are meteorites originating from undifferentiated objects of the Solar System, which may retain signatures of primitive matter. Here, we present a comparative study between two CM chondrites Asuka 12236 and Paris, both considered among the most primitive in the carbonaceous chondrite meteorite collection. This work is based on the combination of infrared and Raman micro-spectroscopy, aiming to compare the spectral characteristics of these two peculiar chondrites. We present an average infrared spectrum from the mid to far infrared of Asuka 12236, which has never been reported yet in the literature. Contrary to the average spectrum of Paris, the Asuka 12236 spectrum shows signatures of anhydrous minerals (olivine and or pyroxene) as well as the presence of amorphous phases. These findings are in agreement with the low degree of alteration reported for Asuka 12236. Aromatic primary amines and imines are also detected in Asuka 12236, heterogeneously distributed within the meteorite. In addition, the comparison of the Raman signatures of the two meteorites highlights different carbon structuration and thus thermal histories. Our spectroscopic investigations confirm that Asuka 12236 can be considered more primitive than the Paris carbonaceous chondrite.</p>","PeriodicalId":18555,"journal":{"name":"Meteoritics & Planetary Science","volume":"60 8","pages":"1851-1860"},"PeriodicalIF":2.4,"publicationDate":"2025-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/maps.70017","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144905466","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Correction to “Shock-metamorphic microstructures in quartz grains from Albian sandstones from the Tin Bider impact structure, Algeria”","authors":"","doi":"10.1111/maps.70015","DOIUrl":"https://doi.org/10.1111/maps.70015","url":null,"abstract":"<p>Kassab, F., Ferrière, L., &amp; Belhai, D. (2021). Shock-metamorphic microstructures in quartz grains from Albian sandstones from the Tin Bider impact structure, Algeria. Meteoritics and Planetary Science, 56(12), 2273–2280. https://doi.org/10.1111/maps.13766</p><p>We apologize for this error.</p>","PeriodicalId":18555,"journal":{"name":"Meteoritics & Planetary Science","volume":"60 8","pages":"1946-1947"},"PeriodicalIF":2.4,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/maps.70015","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144905461","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Origin of metal nodules, veins, and fine-grained metal in several L and H chondrites","authors":"Svetlana N. Teplyakova,&nbsp;Cyril A. Lorenz,&nbsp;Marina A. Ivanova","doi":"10.1111/maps.70013","DOIUrl":"https://doi.org/10.1111/maps.70013","url":null,"abstract":"<p>We investigated the metal nodules, veins, fine-grained particles of ordinary chondrites (OC) Ash Creek (L6), Ghubara (L5), NWA 6096 (L6), Tsarev (L5), Kunya-Urgench (H5), NWA 1588 (H3.8), Tamdakht (H5) and Timochin (H5) using optical microscopy, SEM, and LA-ICP-MS to determine trace element distributions and understand the origin of these metal components. The metal nodules have a fractionated siderophile element composition differing from OC metal, indicating the elements were distributed during melting. Most nodules and veins are depleted in Cu and the highly refractory siderophile elements (HRSE) Re, Os, Ir, Ru, Pt, and Rh. Nodules and veins are enriched in W, Mo, Ni, Co, Au, As, and Sb compared to OC metal. Kunya-Urgench metal shows progressive depletion of refractory siderophile elements, likely due to in situ fractionation of liquid metal injected into the chondrite host. We modeled crystallization of L and H chondrite metal melts, producing results similar to the observed compositions, supporting the hypothesis that the metal components may have originated from unfractionated melted in situ primary metal of chondrites. Variations between modeled and observed W, Fe, and Ga abundances suggest varying redox conditions during melting or metamorphism. Tsarev nodule has a unique HRSE zoning recording its high-temperature thermal history, with modeled cooling to 1300°C in ~1 year, suggesting crystallization in a thermally insulated environment, possibly under a hot layer of impact ejecta. The low-temperature thermal histories (660–200°C) of investigated meteorites' metal suggest that shock compression and re-heating may have resulted in a subsolidus decomposition/recrystallization of the metal.</p>","PeriodicalId":18555,"journal":{"name":"Meteoritics & Planetary Science","volume":"60 9","pages":"1995-2016"},"PeriodicalIF":2.4,"publicationDate":"2025-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145101436","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"2025 Jessberger Award to Prof. Vinciane Debaille","authors":"Allan Treiman,&nbsp;Susanne P. Schwenzer,&nbsp;Alan Brandon,&nbsp;James M. D. Day,&nbsp;Richard J. Walker","doi":"10.1111/maps.70011","DOIUrl":"https://doi.org/10.1111/maps.70011","url":null,"abstract":"&lt;p&gt;Prof. Vinciane Debaille is the 2025 Jessberger awardee.&lt;/p&gt;&lt;p&gt;Back in 2020, a group of us, who had first met at the Lunar and Planetary Institute in Houston, reunited through the only means possible at the time: online. It not only bridged the geographic gap, but it also led us to reminisce about how much time had elapsed since we could sit around a table—usually also involving food—and chat in person. It was then that we remarked on how Vinciane had progressed, how she had developed from the postdoc we shared the table with in Houston to a world-leading researcher and professor of Isotope Geochemistry at Université de Libre Bruxelles in Belgium. We are delighted today that our colleagues share our judgment and that Vinciane will receive the 2025 Jessberger Award.&lt;/p&gt;&lt;p&gt;She then discovered that other planetary bodies have basalts, too, and need isotope geochemists! This is when she came to Houston in 2005 as a postdoc, working with Dr. Alan Brandon at NASA JSC to learn about (among others) extinct radioisotope chronometry and geochemistry. That collaboration led to three foundational papers that demonstrated Dr. Debaille's analytical prowess, her ability to make sense of complementary short- and long-lived isotope systems, and her skill at presenting elegant and understandable interpretations. Those three laid the foundation for her hugely successful career in meteorite and planetary sciences.&lt;/p&gt;&lt;p&gt;The first paper from her post-doctoral work, published in &lt;i&gt;Nature&lt;/i&gt; (Debaille et al., &lt;span&gt;2007&lt;/span&gt;) in 2007, used high-precision analyses of the &lt;sup&gt;142&lt;/sup&gt;Nd/&lt;sup&gt;144&lt;/sup&gt;Nd and &lt;sup&gt;143&lt;/sup&gt;Nd/&lt;sup&gt;144&lt;/sup&gt;Nd ratios of shergottite martian meteorite to show that Mars likely experienced differentiation through progressive crystallization of a magma ocean within about 100 million years of core formation.&lt;/p&gt;&lt;p&gt;The second paper, in 2008 in &lt;i&gt;Earth and Planetary Science Letters&lt;/i&gt; (Debaille et al., &lt;span&gt;2008&lt;/span&gt;), added &lt;sup&gt;176&lt;/sup&gt;Hf/&lt;sup&gt;177&lt;/sup&gt;Hf data to the shergottite Nd story. There, she showed that the shergottites developed from mixtures of material enriched and depleted in incompatible trace elements, and implicated garnet fractionation in their sources.&lt;/p&gt;&lt;p&gt;The third of these seminal papers, 2009 in &lt;i&gt;Nature Geoscience&lt;/i&gt; (Debaille et al., &lt;span&gt;2009&lt;/span&gt;), attacked the other martian meteorites, the nakhlites. From their isotopic systematics, short- and long-lived, Dr. Debaille inferred an early overturn of the martian mantle. These three papers have become the background, the environment, for all subsequent studies of Mars' early evolution.&lt;/p&gt;&lt;p&gt;After her enormously successful time in Houston, Dr. Debaille returned to Belgium to the Université Libre de Bruxelles, first as a postdoc and then to her current position as Senior Research Associate (Maître de recherche). In Brussels, she has continued her work on the isotopic characteristics of both meteorites and terrestrial systems, many in collaboration with stu","PeriodicalId":18555,"journal":{"name":"Meteoritics & Planetary Science","volume":"60 S1","pages":"353-355"},"PeriodicalIF":2.4,"publicationDate":"2025-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/maps.70011","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145022041","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The azimuthal distribution of ejecta mass from oblique impacts into sand","authors":"Alice C. Quillen,&nbsp;Sean Doran","doi":"10.1111/maps.70006","DOIUrl":"https://doi.org/10.1111/maps.70006","url":null,"abstract":"<p>We measure ejecta mass as a function of azimuthal and impact angle for 104 m/s oblique impacts into sand. We find that the ejecta mass distribution is strongly sensitive to azimuthal angle, with as high as eight times more mass in ejecta on the downrange side compared to the uprange side. Crater radii, measured from the impact point, are measured at different impact and azimuthal angles. Crater ejecta scaling laws are modified to depend on azimuthal and impact angle. We find that crater radii are sensitive to both impact and azimuthal angle, but the ejecta mass as a function of both angles can be estimated from the cube of the crater radius without an additional angular dependent function. The ejecta distributions are relevant for processes that depend upon the integrated properties of approximately 100 m/s impacts occurring in the outer solar system and possibly during planetesimal formation.</p>","PeriodicalId":18555,"journal":{"name":"Meteoritics & Planetary Science","volume":"60 8","pages":"1835-1850"},"PeriodicalIF":2.4,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144905297","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A feasibility assessment of micromill sampling for Rb-Sr and Sm-Nd geochronology of shergottites","authors":"A. I. Sheen,&nbsp;C. D. K. Herd,&nbsp;K. T. Tait","doi":"10.1111/maps.70002","DOIUrl":"https://doi.org/10.1111/maps.70002","url":null,"abstract":"<p>Accurate dating of Martian meteorites is crucial for understanding key events in the planet's evolution. However, not all Martian meteorites are amenable to dating techniques currently in use for these rocks. The priority of sample preservation precludes mineral separation methods for low-volume specimens, whereas the less destructive in situ SIMS U-Pb method depends on the availability of U-bearing accessory minerals. Micromilling allows for spatially guided sampling of target phases down to the sub-mm scale, therefore enabling chromatography-based analysis while preserving the overall specimen. This study presents an evaluation of micromill sampling for extracting individual mineral fractions in situ from shergottites, the most common group of Martian meteorites, for Rb-Sr and Sm-Nd geochronology. Based on trace element content in major minerals in shergottites (pyroxene, plagioclase, olivine, and merrillite) and assuming that a minimum load size of 0.25 ng Sr and 1 ng Nd is required to achieve baseline isotopic precision (2<i>σ</i> of ~240 ppm on ⁸⁷Sr/⁸⁶Sr and ~100 ppm on ¹⁴³Nd/¹⁴⁴Nd), the minimum required sample volume ranges in the orders of 10⁵–10⁷ μm³ for one Sr isotopic analysis and 10⁵–10⁹ μm³ for one Nd isotopic analysis. Considering the need for sample purity, significant limitations exist in the maximum sampling resolution of the micromill instrument (~40 μm for the conical carbide drill bit chosen for this study) with respect to shergottite petrography. Insufficient grain size, irregular morphology, and the presence of small inclusions may reduce the area that can be drilled per grain. Shock-induced fractures, which sometimes act as pathways for terrestrial alteration, are pervasive in shergottites and create additional challenges for effective high-purity sampling of the target phase. In addition, variation in trace element content in the target phases may result in the realistically required drilling volumes being orders of magnitude greater than the minimum estimates. Lastly, estimated drilling time per fraction may reach over 5 h for pyroxene (Sr, Nd), plagioclase (Nd), and olivine (Sr, Nd), increasing the susceptibility to a larger procedural blank as well as requiring constant, labor-intensive monitoring for long durations. Based on these technical and physical constraints, we do not consider micromill sampling to be currently compatible with Sr isotopic analysis of olivine and Nd isotopic analysis of pyroxene, plagioclase, and olivine in shergottites. The feasibility of geochronology applications may be improved with future advances in analytical development, such as increasing the micromill sampling resolution and reducing the load size required for isotopic analysis.</p>","PeriodicalId":18555,"journal":{"name":"Meteoritics & Planetary Science","volume":"60 8","pages":"1814-1834"},"PeriodicalIF":2.4,"publicationDate":"2025-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/maps.70002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144905531","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"In Memoriam: Bevan M. French (March 8, 1937–May 10, 2025)","authors":"Steven Jaret,&nbsp;Peter Schultz,&nbsp;Ludovic Ferrière,&nbsp;Christian Koeberl","doi":"10.1111/maps.70010","DOIUrl":"https://doi.org/10.1111/maps.70010","url":null,"abstract":"&lt;p&gt;Bevan French (Figure 1) is most widely known for his pioneering work in planetary science and the field of impact cratering. He was one of the early workers on terrestrial impact materials along with Gene Shoemaker, Robert Dietz, Nick Short, Richard Grieve, Mike Dence, Dieter Stöffler, Ed Chao, and others. Throughout his career, Bevan was a champion for impact science, particularly centered on petrography and geologic observations at terrestrial craters. His 1998 book, Traces of Catastrophe, published by the Lunar and Planetary Institute in Houston, is still used today in classrooms across the world as one of the standard introduction texts for impact cratering.&lt;/p&gt;&lt;p&gt;Bevan French was born on March 8, 1937, in East Orange, NJ, USA. At age 15, he was already actively involved in collecting rare minerals at Franklin, NJ, for his own mineral studies group. A few years later, in 1954, his minerals got him into the Top 40 of the Westinghouse Science Talent Search, which also led to a summer job at the National Bureau of Standards during the same year. He obtained an A.B. degree in geology from Dartmouth College, Hanover, NH, USA (1958), a M.S. in geochemistry from the California Institute of Technology, Pasadena, CA, USA (1960), and a Ph.D. in geology at The Johns Hopkins University, Baltimore, MD, USA (1964), with a thesis titled “Stability of Siderite, FeCO&lt;sub&gt;3&lt;/sub&gt;, and Progressive Metamorphism of Iron Formation,” on metamorphic petrology of iron formations in the Minnesota Iron Range. At a geological conference in Minneapolis in the mid-60s, Bevan gave a talk about his thesis work which attracted a smart lady geologist who was working for an iron-mining company. Two years later, in 1967, they married. Mary-Hill French became a close partner in editing Bevan's manuscripts and joined in all the travels around the world, in a total of 32 different countries (Figure 2). Bevan joked about robbing the cradle: Bevan was much younger. Together, they supported young investigators interested in terrestrial impacts until her passing in 2019 at the age of 102.&lt;/p&gt;&lt;p&gt;Amusingly, Bevan's work in the 1960s on the Iron Range was done well before recognition of the Sudbury as an impact structure and the subsequent discovery of Sudbury ejecta in the Iron Range. In recent years, Bevan joked about how, 50 years later, he was returning to his geologic roots with renewed interest in Sudbury and associated rocks on the Canadian Shield. Bevan's work on Sudbury, starting in the mid to late 1960s, was essential in confirming the impact origin of this structure. Starting with his pioneering work on shock-metamorphic studies, especially on quartz, in the later 1960s, he then collaborated with several colleagues to provide evidence for the impact origin of several other promising structures around the world, such as Rochechouart, B.P., Oasis, Tenoumer, Aouelloul, Araguainha, and Serra da Canghala. His impact pedigree is actually shared: he is a distant cousin of Don Gaul","PeriodicalId":18555,"journal":{"name":"Meteoritics & Planetary Science","volume":"60 8","pages":"1939-1945"},"PeriodicalIF":2.4,"publicationDate":"2025-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/maps.70010","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144905374","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}