Meteoritics & Planetary Science最新文献_第3页

Sampling the volcanic plumes at Io: Impact speeds and shock conditions 木卫一火山羽流的采样：冲击速度和冲击条件

IF 2.4 4区地球科学

Meteoritics & Planetary Science Pub Date : 2026-01-06 DOI: 10.1111/maps.70090

M. J. Burchell, R. C. Ogliore, P. J. Wozniakiewicz

{"title":"Sampling the volcanic plumes at Io: Impact speeds and shock conditions","authors":"M. J. Burchell, R. C. Ogliore, P. J. Wozniakiewicz","doi":"10.1111/maps.70090","DOIUrl":"https://doi.org/10.1111/maps.70090","url":null,"abstract":"The desire to sample material from the interior of Io, by flying through its volcanic plumes, requires consideration of the flyby speed and the types of sample collection techniques that can be utilized. Low speed collection (1–2.5 km s−1) would require an orbit around Io itself, which is unlikely due to the accumulated radiation dose that would be experienced. Moderate collection speeds (7–9 km s−1) are possible for flybys of Io arising from either a single passage through the Jovian system (followed by sample return) or a carefully selected orbit around Jupiter that has the main purpose of visiting Io. However, even if they include an Io close passage, most Jovian mission orbit concepts also include and even prioritize other science objectives, resulting in orbits with Io collection speeds of around 17–19 km s−1 (or greater). Depending on the speed and collector material, the peak shock pressures during collection may thus range from 5 to hundreds of GPa for impacts on solid, nonporous media, with pressures from 0.01 to 5 GPa for impacts on low-density aerogels. These shock pressures are calculated herein for a range of Io encounter speeds and collector types, and the degree of sample capture and impact processing are estimated. While capture of material is shown to be possible at speeds up to 10 km s−1, permitting both in situ analysis or sample return to Earth, above these speeds retention of significant amounts of unvaporized material in a collector is not viable.","PeriodicalId":18555,"journal":{"name":"Meteoritics & Planetary Science","volume":"61 2","pages":"241-271"},"PeriodicalIF":2.4,"publicationDate":"2026-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/maps.70090","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146176174","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}

引用次数: 0

Small but mighty: Impact hazards from iron Near-Earth Objects 小而有力：近地铁天体的撞击危险

IF 2.4 4区地球科学

Meteoritics & Planetary Science Pub Date : 2025-12-27 DOI: 10.1111/maps.70086

Robert Luther, Natalia Artemieva, Andrea Schmalen, Kai Wünnemann, Detlef Koschny, Richard Moissl

{"title":"Small but mighty: Impact hazards from iron Near-Earth Objects","authors":"Robert Luther, Natalia Artemieva, Andrea Schmalen, Kai Wünnemann, Detlef Koschny, Richard Moissl","doi":"10.1111/maps.70086","DOIUrl":"https://doi.org/10.1111/maps.70086","url":null,"abstract":"Small asteroids can impact Earth unexpectedly, as demonstrated by the Chelyabinsk event in 2013. The warning times are likely to be short, and the first tools for fast hazard predictions have been developed in the last years for encounters with rocky or cometary objects, which quickly fragment in the atmosphere and cause airbursts. However, in the projectile diameter range <20 m (and possibly up to 50 m), the ground effects caused by the entry of iron asteroids, denser and stronger than other objects, are much more severe than for rocky asteroids of equal energy. The existing prediction tools do not provide reliable results for such scenarios. In this work, we first review historical iron falls and related damage, and then discuss the applicability of existing semi-analytical models for iron falls. We compare the calculated damage caused by the Barringer crater formation with early estimates. Finally, we present our new model, which allows us to estimate the maximum damage envelope caused by iron meteoroids with unknown strength.","PeriodicalId":18555,"journal":{"name":"Meteoritics & Planetary Science","volume":"61 2","pages":"224-240"},"PeriodicalIF":2.4,"publicationDate":"2025-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/maps.70086","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146176617","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}

引用次数: 0

Correction to “What falls versus what we recover: Quantifying search and recovery bias for orbital meteorites” 对“坠落与恢复：量化轨道陨石的搜索和恢复偏差”的更正

IF 2.4 4区地球科学

Meteoritics & Planetary Science Pub Date : 2025-12-23 DOI: 10.1111/maps.70087

引用次数: 0

Rapid terrestrial weathering of the CI1 carbonaceous chondrite find Oued Chebeika 002 Oued Chebeika 002发现的CI1碳质球粒陨石的快速陆地风化

IF 2.4 4区地球科学

Meteoritics & Planetary Science Pub Date : 2025-12-22 DOI: 10.1111/maps.70089

Martin R. Lee, Jasper Glazer

{"title":"Rapid terrestrial weathering of the CI1 carbonaceous chondrite find Oued Chebeika 002","authors":"Martin R. Lee, Jasper Glazer","doi":"10.1111/maps.70089","DOIUrl":"https://doi.org/10.1111/maps.70089","url":null,"abstract":"Alteration of historic CI1 meteorite falls during their curation demonstrates the susceptibility of smectite-rich carbonaceous chondrites to terrestrial exposure. The discovery of Oued Chebeika 002 in Morocco in June 2024 presents a unique opportunity to document the earliest stages of weathering of a CI1 find. We studied 10–30 mg fragments that had been recovered by September 2024. Grains of quartz and feldspar were implanted into the fragments by wind action whilst on the desert floor. Gypsum is the main product of terrestrial weathering. It encrusts their outer surfaces, in one case covering 5.3% of a fragment, and has filled voids within both fractures and phyllosilicate clasts. Other products of terrestrial weathering are Ca-carbonate grains that have grown within a sand-filled fracture, and rock inhabiting fungi colonizing the surface of a fragment. Chemical weathering was facilitated by water that had been adsorbed by smectite from the humid desert air, and crystallization of gypsum was driven by evaporation from the surfaces of those fragments that were exposed to direct sunlight. The gypsum and Ca-carbonate grew over a period of 3 or 4 months, approximately between June and September 2024, whereas the time scale of fungal colonization can only be constrained to a year or less. The rapid interaction of Oued Chebeika 002 with the Earth's atmosphere, lithosphere, and biosphere underscores the importance of prompt recovery and careful curation of CI1 and other smectite-rich meteorites.","PeriodicalId":18555,"journal":{"name":"Meteoritics & Planetary Science","volume":"61 2","pages":"211-223"},"PeriodicalIF":2.4,"publicationDate":"2025-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/maps.70089","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146176527","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}

引用次数: 0

Enhanced understanding of the K–Pg boundary in the Indian subcontinent: Petrological, mineralogical, and geochemical insights 加强对印度次大陆K-Pg边界的认识：岩石学、矿物学和地球化学见解

IF 2.4 4区地球科学

Meteoritics & Planetary Science Pub Date : 2025-12-19 DOI: 10.1111/maps.70081

S. James, Saranya R. Chandran, J. Aswathi, Arun Bhadran, Drishya Girishbai, M. N. Praveen, Anil Chavan, Subhash Bhandari, M. Satyanarayanan, Ram Mohan, Dwijesh Ray, K. S. Sajinkumar

{"title":"Enhanced understanding of the K–Pg boundary in the Indian subcontinent: Petrological, mineralogical, and geochemical insights","authors":"S. James, Saranya R. Chandran, J. Aswathi, Arun Bhadran, Drishya Girishbai, M. N. Praveen, Anil Chavan, Subhash Bhandari, M. Satyanarayanan, Ram Mohan, Dwijesh Ray, K. S. Sajinkumar","doi":"10.1111/maps.70081","DOIUrl":"10.1111/maps.70081","url":null,"abstract":"At ~66 Ma, the Cretaceous–Paleogene Boundary (KPB) sections at Anjar and Um Sohryngkew (India) were 14,333 and 16,549 km, respectively, from Chicxulub, making them the farthest distal KPBs. The spatial and temporal proximity of the sites to Deccan volcanism makes them important locations to better understand the impact-volcanism debate. This study integrates petrological, mineralogical, and geochemical techniques to distinguish signatures of the instantaneous Chicxulub impact from those of the prolonged Deccan volcanism (lasting ~10 my). The sites contained two ejecta components: a potential spherule (Um Sohryngkew) and Ir-anomalies. The poorly preserved spherule (~240 μm diameter) exhibited mineral dendrites. At Anjar, two Ir-anomalies are noted: 8.50 ppb (SGA-2; ~3.19 m below Flow IV) and 1.16 ppb (SGA-12). Four Ir-anomalies are noted at Um Sohryngkew: 1.36 ppb (SMU-19; 28.44 m from the oldest layer), 3.17 (SMU-14), 7.00 (SMU-7), and 1.19 ppb (SMU-6). Multiple Ir-anomalies, elevated background-Ir, and glass shards at both sites highlight a greater influence of Deccan volcanism than previously recognized. Deccan magma-based Ir-enrichment is unlikely as such values were not reported in Deccan basalts, but higher Ir-concentrations in sedimentary layers point to indirect contributions from Deccan outgassing. Thus, the findings of the study underscore the complex interplay of Deccan volcanism and Chicxulub impact across the Indian Subcontinent.","PeriodicalId":18555,"journal":{"name":"Meteoritics & Planetary Science","volume":"61 1","pages":"140-167"},"PeriodicalIF":2.4,"publicationDate":"2025-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146057875","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}

引用次数: 0

THEMIS and CTX-based assessment of crater rim thermal inertia over the Martian southern hemisphere region 基于THEMIS和ctx的火星南半球地区陨石坑边缘热惯性评估

IF 2.4 4区地球科学

Meteoritics & Planetary Science Pub Date : 2025-12-19 DOI: 10.1111/maps.70076

Farzana Shaheen, Mili Ghosh Nee Lala, A. P. Krishna

{"title":"THEMIS and CTX-based assessment of crater rim thermal inertia over the Martian southern hemisphere region","authors":"Farzana Shaheen, Mili Ghosh Nee Lala, A. P. Krishna","doi":"10.1111/maps.70076","DOIUrl":"10.1111/maps.70076","url":null,"abstract":"On Mars, neighboring craters of similar diameter show variations in rim thermal inertia. In this study, thermal inertia (TI) was calculated using Mars Odyssey Thermal Emission Imaging System (THEMIS) nighttime images acquired during the southern hemisphere Martian autumn, a period with minimal fine dust influence. One hundred and thirty-seven craters of different diameters across 21 TI scenes were analyzed, encompassing Gale Crater and its surroundings. Morphological parameters such as depth-diameter ratio (d/D), radii variation (RV), rim irregularity (RI), and mantle rim percentage (MRP) were derived using Mars Reconnaissance Orbiter (MRO) Context camera (CTX) images. Two hypotheses were tested: Hypothesis I—Crater rim thermal inertia influenced by crater degradation during the southern hemisphere Martian autumn, and Hypothesis II—Crater rim thermal inertia influenced by crater rim regolith mantling during the southern hemisphere Martian autumn. Multilevel regression models were used to test the hypotheses. Hypothesis I was rejected, and Hypothesis II was found to be statistically significant (p < 0.05), indicating crater rim TI variations are largely influenced by regolith mantling, reflecting dominant depositional activity. During the southern hemisphere autumn on Mars, atmospheric dust levels are relatively low; however, significant surface dust remains, likely redistributed by dust storms from the preceding summer season.","PeriodicalId":18555,"journal":{"name":"Meteoritics & Planetary Science","volume":"61 1","pages":"81-106"},"PeriodicalIF":2.4,"publicationDate":"2025-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146057923","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}

引用次数: 0

Occurrence and characterization of nanosulfide-rich regions on asteroid Ryugu: Insights from mackinawite and pyrrhotite 小行星Ryugu上纳米硫化物富区赋存状态及特征：来自磁黄铁矿和磁黄铁矿的见解

IF 2.4 4区地球科学

Meteoritics & Planetary Science Pub Date : 2025-12-15 DOI: 10.1111/maps.70083

Roberto Conconi, Hugues Leroux, Maya Marinova, Sylvain Laforet, Damien Jacob, Léna Jossé, Alice Aléon-Toppani, Zélia Dionnet, Rosario Brunetto, Corentin Le Guillou

{"title":"Occurrence and characterization of nanosulfide-rich regions on asteroid Ryugu: Insights from mackinawite and pyrrhotite","authors":"Roberto Conconi, Hugues Leroux, Maya Marinova, Sylvain Laforet, Damien Jacob, Léna Jossé, Alice Aléon-Toppani, Zélia Dionnet, Rosario Brunetto, Corentin Le Guillou","doi":"10.1111/maps.70083","DOIUrl":"10.1111/maps.70083","url":null,"abstract":"Samples returned from asteroid Ryugu by the Hayabusa2 mission are dominated by fine-grained matrix material made of phyllosilicates and nanosulfides. Here, we report the mineralogical, textural, and chemical characteristics of nanosulfide-rich regions identified in Ryugu particles. High-resolution scanning transmission electron microscopy and energy-dispersive X-ray spectroscopy reveal nanoscale heterogeneities in sulfide composition and morphology, indicating formation under variable conditions. Nanosulfide-rich regions are dominated by the presence of mackinawite (FeS) and pyrrhotite (Fe1-xS), in different proportions. Mackinawite, identified for the first time in Ryugu, occurs as well-crystallized lamellar crystals with some areas containing greigite (Fe3S4) and others showing signs of oxidation. In contrast, pyrrhotite appears either as euhedral nanocrystals or as structurally complex grains composed of stacked platy segments, which are characterized by numerous defects, including inclusions and planar defects. The distribution and associations of these phases are consistent with low-temperature aqueous alteration under alkaline and reducing conditions, likely occurring in Ryugu's parent body. The presence of mackinawite implies complex thermodynamic and kinetic constraints and suggests the presence of localized fluids in which Fe concentrations exceeded those of S by an order of magnitude.","PeriodicalId":18555,"journal":{"name":"Meteoritics & Planetary Science","volume":"61 1","pages":"168-181"},"PeriodicalIF":2.4,"publicationDate":"2025-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/maps.70083","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146083264","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}

引用次数: 0

Cover 封面

IF 2.4 4区地球科学

Meteoritics & Planetary Science Pub Date : 2025-12-11 DOI: 10.1111/maps.14215

引用次数: 0

Modeling enstatite chondrites: Reduced rocks with a pinch of oxidized material (affected by varying H2O(g)) derived from planetesimals shocked during the epoch of giant–planet migration 模拟顽辉石球粒陨石：由巨行星迁移时期受到冲击的星子产生的带有少量氧化物质（受不同H2O(g)的影响）的还原岩石

IF 2.4 4区地球科学

Meteoritics & Planetary Science Pub Date : 2025-12-04 DOI: 10.1111/maps.70080

Alan E. Rubin

{"title":"Modeling enstatite chondrites: Reduced rocks with a pinch of oxidized material (affected by varying H2O(g)) derived from planetesimals shocked during the epoch of giant–planet migration","authors":"Alan E. Rubin","doi":"10.1111/maps.70080","DOIUrl":"10.1111/maps.70080","url":null,"abstract":"The O-, N-, Mo-, Ru-, Os-, Cr-, Ti-, Ni-, Fe-, Nd-, Ca-, Zn-, Sr-, and Mg-isotopic compositions of enstatite chondrites are essentially identical to those of the Earth and Moon. These correspondences suggest enstatite chondrites formed at ≈1 AU as the only known chondrite groups that accreted in the vicinity of a major planet. Bulk Earth has a higher Mg/Si weight ratio (1.09) than enstatite chondrites (0.63–0.76) and aubrites (0.84). Earth could have accreted from a mixture of these materials along with forsterite (Mg/Si = 1.73) and niningerite [(Mg,Fe)S] from the lower mantles of aubritic parent asteroids whose crusts and upper mantles were stripped off by hit-and-run collisions. The highly reducing conditions in which enstatite chondrites formed resulted from the dehydration of the inner regions of the nebula caused by outward diffusion of water vapor; this lowered the H2O/H2 ratio of the gas. The minor fraction of oxidized material in enstatite chondrites formed earlier—when the H2O/H2 ratio was briefly enhanced by inward-migrating ice particles. Enstatite chondrites are the most shocked chondrite groups, exhibiting a large variety of shock features—for example, deformed silicate lattices; petrofabrics; brecciation; shock veins; metal globules; coesite; impact-melt textures; impact-produced phases (keilite, sinoite, graphite and F-rich minerals); and fractionated bulk REE patterns. The Ar-Ar, Rb-Sr and I-Xe ages of enstatite chondrites indicate many of these rocks were shocked early in Solar System history, 4520–4563 Ma ago. This interval stretches back to the period of giant-planet migration, when the 1 AU region became dynamically excited.","PeriodicalId":18555,"journal":{"name":"Meteoritics & Planetary Science","volume":"61 1","pages":"122-139"},"PeriodicalIF":2.4,"publicationDate":"2025-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/maps.70080","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146057699","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}

引用次数: 0

Description and modeling of the Jiddat al Harasis 091 L5 strewn field Jiddat al Harasis 091 L5散布场的描述与建模

IF 2.4 4区地球科学

Meteoritics & Planetary Science Pub Date : 2025-12-02 DOI: 10.1111/maps.70079

Karl Wimmer, Edwin Gnos, Beda Hofmann, Sandro Boschetti, Jan Walbrecker, Hansruedi Maurer

{"title":"Description and modeling of the Jiddat al Harasis 091 L5 strewn field","authors":"Karl Wimmer, Edwin Gnos, Beda Hofmann, Sandro Boschetti, Jan Walbrecker, Hansruedi Maurer","doi":"10.1111/maps.70079","DOIUrl":"10.1111/maps.70079","url":null,"abstract":"With a size of 51.2 × 7.2 km, the 10.9 ± 1.7 ka old Jiddat al Harasis 091 L5 chondrite strewn field is the largest known in Oman. It consists of more than 700 meteorites with a total mass of >4.5 tons from which the largest six stones of >100 kg to 1.5 tons make up two thirds of the total mass. Small stones are underrepresented, consistent with a fracturing behavior of a meteor with low shock level. Modeling yields that a bolide with 28 ± 12 tons (115 ± 15 cm radius) entered the atmosphere at a shallow angle of 22° ± 2° with a velocity of about 16 kms−1. For ~16 s, it produced a spectacular meteor along a luminous path of ~200 km length. Mass mixing within the rather straight and narrow strewn field indicates a sequence of multiple fragmentations from below 50 km down to 7 km altitude. This can be resolved adopting a wind profile from nowadays winter season, as the weather patterns with alternating Monsoon and Passat winds in the region are rather well known and repeatable since the last ice age. The largest masses with 1447 and 842 kg, respectively, produced impact breccia consisting of limestone and meteorite fragments. According to the model, the biggest mass hit the ground at a velocity of 175 ms−1 and released an impact energy of 22 MJ, corresponding to 5.3 kg TNT. This may have produced an impact crater of ~1 m diameter which, however, is not preserved. Breccia found below a much smaller mass of 68 kg deserves an explanation beyond impact energy.","PeriodicalId":18555,"journal":{"name":"Meteoritics & Planetary Science","volume":"61 1","pages":"107-121"},"PeriodicalIF":2.4,"publicationDate":"2025-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/maps.70079","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146057800","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}

引用次数: 0