Meteoritics & Planetary Science最新文献_第8页

Djerfisherite in a Ryugu grain: A clue to localized heterogeneous conditions or material mixing in the early solar system 龙宫颗粒中的水母：早期太阳系局部不均匀条件或物质混合的线索

IF 2.2 4区地球科学

Meteoritics & Planetary Science Pub Date : 2025-05-28 DOI: 10.1111/maps.14370

Masaaki Miyahara, Takaaki Noguchi, Akira Yamaguchi, Toru Nakahashi, Yuto Takaki, Toru Matsumoto, Naotaka Tomioka, Akira Miyake, Yohei Igami, Yusuke Seto

{"title":"Djerfisherite in a Ryugu grain: A clue to localized heterogeneous conditions or material mixing in the early solar system","authors":"Masaaki Miyahara, Takaaki Noguchi, Akira Yamaguchi, Toru Nakahashi, Yuto Takaki, Toru Matsumoto, Naotaka Tomioka, Akira Miyake, Yohei Igami, Yusuke Seto","doi":"10.1111/maps.14370","DOIUrl":"https://doi.org/10.1111/maps.14370","url":null,"abstract":"Djerfisherite, a K-bearing Fe-Ni sulfide, was identified in grain C0105-042 collected from the subsurface of asteroid Ryugu through SEM and TEM analyses. The mineral occurs as an isolated crystal embedded within a matrix of Mg-Fe phyllosilicates. Although djerfisherite is known to form as a condensate phase in enstatite chondrites and aubrites, its mode of occurrence in Ryugu grain C0105-042 is markedly different. Two possible origin scenarios are considered: (i) an extrinsic origin, in which a djerfisherite fragment derived from enstatite chondrites or aubrites was deposited onto asteroid Ryugu, and (ii) an intrinsic origin, where djerfisherite formed in situ through a localized reaction between K-bearing hot fluid or vapor and Fe-Ni sulfide under reducing alkaline conditions within asteroid Ryugu's body. Isotopic data, which could directly constrain its origin, are currently unavailable; thus, the origin of djerfisherite remains unresolved. Nonetheless, this finding suggests the presence of exotic material or localized chemical heterogeneities within Ryugu's body, offering new insights into the complex evolutionary processes that shaped primitive bodies in the early Solar System.","PeriodicalId":18555,"journal":{"name":"Meteoritics & Planetary Science","volume":"60 7","pages":"1666-1673"},"PeriodicalIF":2.2,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144705390","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

Silicate–sulfide interaction within quenched melts of space weathered Ryugu grains 空间风化龙宫颗粒淬火熔体中硅酸盐-硫化物的相互作用

IF 2.2 4区地球科学

Meteoritics & Planetary Science Pub Date : 2025-05-26 DOI: 10.1111/maps.14366

Sylvain Laforet, Hugues Leroux, Corentin Le Guillou, Maya Marinova, Adrien Néri, Adrien Teurtrie, Francisco de la Peña, Damien Jacob, Alexandre Fadel, David Troadec

{"title":"Silicate–sulfide interaction within quenched melts of space weathered Ryugu grains","authors":"Sylvain Laforet, Hugues Leroux, Corentin Le Guillou, Maya Marinova, Adrien Néri, Adrien Teurtrie, Francisco de la Peña, Damien Jacob, Alexandre Fadel, David Troadec","doi":"10.1111/maps.14366","DOIUrl":"https://doi.org/10.1111/maps.14366","url":null,"abstract":"The first few microns of the surface of airless bodies are subject to severe changes due to the harsh environment of space, known as space weathering. The Hayabusa2 sample return mission from the asteroid Ryugu provides the first opportunity to study these effects on a carbonaceous and hydrated body. Understanding the structural and chemical changes that occur in the space weathered layers of Ryugu is crucial to correctly interpreting the mechanisms involved in such processes. This study employs transmission electron microscopy to achieve the spatial resolution necessary to analyze the nanoscale heterogeneities in these modified layers. The chemical analyses indicate that features present are likely to represent the spattering of a Ryugu-like material, possibly from a different lithology of the asteroid. However, such material appears to be completely dehydroxylated and depleted in sulfur by approximately 20%. Furthermore, the nanoscale dispersion of vesicles and rounded nanosulfides found in these melt layers helps to estimate the temperatures (>1300°C) and the time scales (<10−8 s) involved in their formation. In addition, this study describes and discusses a unique spherical feature not previously observed in Ryugu samples. The 3 μm-sized object shows strong similarities to microchondrules observed in some carbonaceous (CM2) and ordinary chondrites, suggesting a divergent thermal history from that of the melt layers.","PeriodicalId":18555,"journal":{"name":"Meteoritics & Planetary Science","volume":"60 7","pages":"1480-1501"},"PeriodicalIF":2.2,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/maps.14366","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144705517","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

2025 Nier Prize for Nicole Xike Nie 2025年尼尔奖：妮可·希克·聂

IF 2.2 4区地球科学

Meteoritics & Planetary Science Pub Date : 2025-05-24 DOI: 10.1111/maps.14365

Nicolas Dauphas

引用次数: 0

Comparison of the iron-bearing crystals and phases from Tamdakht H5 and Annama H5 ordinary chondrites by X-ray diffraction, magnetization measurements and Mössbauer spectroscopy Tamdakht H5和Annama H5普通球粒陨石含铁晶体和相的x射线衍射、磁化测量和Mössbauer光谱比较

IF 2.2 4区地球科学

Meteoritics & Planetary Science Pub Date : 2025-05-24 DOI: 10.1111/maps.14368

M. V. Goryunov, E. V. Petrova, A. V. Chukin, A. A. Maksimova, G. Varga, Z. Dankházi, I. Felner, G. Leitus, M. Gritsevich, E. Kuzmann, Z. Homonnay, T. Kohout, M. I. Oshtrakh

{"title":"Comparison of the iron-bearing crystals and phases from Tamdakht H5 and Annama H5 ordinary chondrites by X-ray diffraction, magnetization measurements and Mössbauer spectroscopy","authors":"M. V. Goryunov, E. V. Petrova, A. V. Chukin, A. A. Maksimova, G. Varga, Z. Dankházi, I. Felner, G. Leitus, M. Gritsevich, E. Kuzmann, Z. Homonnay, T. Kohout, M. I. Oshtrakh","doi":"10.1111/maps.14368","DOIUrl":"https://doi.org/10.1111/maps.14368","url":null,"abstract":"The iron-bearing phases and crystals within (i) the bulk interior and the fusion crust from Tamdakht H5 and (ii) the bulk interior from Annama H5 ordinary chondrites were studied by optical microscopy, scanning electron microscopy with energy dispersive spectroscopy, X-ray diffraction (XRD), magnetization measurements, and Mössbauer spectroscopy. The main iron-bearing phases/crystals such as olivine, orthopyroxene, clinopyroxene, troilite, chromite, and hercynite, as well as Fe-Ni-Co alloy with the α2-Fe(Ni, Co), α-Fe(Ni, Co) and γ-Fe(Ni, Co) phases were identified in both meteorites. XRD and Mössbauer spectroscopy showed high contents of Fe-Ni-Co alloy in the bulk interiors from Tamdakht H5 and Annama H5 ordinary chondrites. The fusion crust from Tamdakht H5 contains a new phase of magnesioferrite. A classification scheme for H, L, and LL ordinary chondrites using the relative areas of Mössbauer spectral components was applied to these meteorites' classification. The ratios of the M1 and M2 site occupations by Fe2+ in olivine and orthopyroxene were determined using XRD and Mössbauer spectroscopy, showing consistent results. The equilibrium cation distribution temperatures for olivine and orthopyroxene in Tamdakht H5 and Annama H5 were determined using XRD and Mössbauer spectroscopy.","PeriodicalId":18555,"journal":{"name":"Meteoritics & Planetary Science","volume":"60 7","pages":"1520-1544"},"PeriodicalIF":2.2,"publicationDate":"2025-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144705311","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

Selective sampling of asteroids, the Moon, and Mars: Factors affecting the numerical abundances of members of meteorite groups 小行星、月球和火星的选择性取样：影响陨石群成员数量丰度的因素

IF 2.2 4区地球科学

Meteoritics & Planetary Science Pub Date : 2025-05-22 DOI: 10.1111/maps.14367

Alan E. Rubin

{"title":"Selective sampling of asteroids, the Moon, and Mars: Factors affecting the numerical abundances of members of meteorite groups","authors":"Alan E. Rubin","doi":"10.1111/maps.14367","DOIUrl":"https://doi.org/10.1111/maps.14367","url":null,"abstract":"Meteorite collection inventories show that many related meteorite groups have very different numerical abundances (e.g., lunar versus Martian meteorites; Eagle Station pallasites versus main-group pallasites; eucrites versus diogenites; ungrouped Antarctic irons versus ungrouped non-Antarctic irons; carbonaceous chondrite-related (CC) iron meteorites versus noncarbonaceous chondrite-related (NC) iron meteorites). The number of members of individual meteorite groups reflects the entire history of these rocks from excavation on their parent bodies to recovery on Earth. These numbers are functions of six main selection factors: (1) volume of the parent-body source region, (2) depth of this source region, (3) time spent in interplanetary space, (4) friability of meteoroids in space and during transit through the Earth's atmosphere, (5) susceptibility of meteorite finds to terrestrial weathering, and (6) post-fall biases resulting from geography, demography, and preferences by meteorite collectors and analysts. The numerical ratio of lunar/Martian meteorites (~1.8) results from several factors including the Moon's proximity, the short transit time of lunar meteoroids through interplanetary space, the lower crustal depth from which lunar meteorites were excavated, the lower energy required to launch samples off the Moon than off Mars, and the lower porosity and higher mechanical strength of lunar meteorites. The dunite shortage among asteroidal meteorites may have resulted from the deeply buried olivine-rich meteoroids being ejected hundreds of millions of years ago at the same time as pallasites and irons; however, the dunitic meteoroids (with their lower mechanical strength) would have eroded in interplanetary space on much shorter time scales than their metal-rich fellow travelers.","PeriodicalId":18555,"journal":{"name":"Meteoritics & Planetary Science","volume":"60 7","pages":"1502-1519"},"PeriodicalIF":2.2,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/maps.14367","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144705105","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

Petrography and field relationships of impact lithologies at the Gardnos impact structure, Norway 挪威Gardnos冲击构造的岩石学和冲击岩性场关系

IF 2.4 4区地球科学

Meteoritics & Planetary Science Pub Date : 2025-05-12 DOI: 10.1111/maps.14354

Steven J. Jaret, William R. Hyde, Leah Shteynman

{"title":"Petrography and field relationships of impact lithologies at the Gardnos impact structure, Norway","authors":"Steven J. Jaret, William R. Hyde, Leah Shteynman","doi":"10.1111/maps.14354","DOIUrl":"https://doi.org/10.1111/maps.14354","url":null,"abstract":"New mapping and laboratory studies of the impactites at the Gardnos impact structure (Norway) show a variety of impact-deformed rocks. Our mapping and petrographic analyses have subdivided these breccias into three distinct categories: (a) melt-bearing sueivitic breccias, melt-bearing polymict breccias; (b) melt-free, polymict lithic impact breccias; and (c) monomict lithic impact breccias. This illustrates the dynamic nature of crater floor processes where mixing occurs in multiple ways. Feldspar grains exhibit evidence of intense shear, micro-faults, and alternate twin deformation in feldspar. We also observe the development of additional, amphibole-like planar elements (or cleavage) in biotite. Melt-bearing breccias contain carbon concentrations up to an order of magnitude higher than the target rocks. Unusual textures of carbon petrographically associated with shock and post-shock features in feldspars suggest significant postimpact hydrothermal mobilization of carbon within these rocks. Gardnos, therefore, represents an important terrestrial analog for understanding a suite of impact- and postimpact geologic processes.","PeriodicalId":18555,"journal":{"name":"Meteoritics & Planetary Science","volume":"60 8","pages":"1685-1703"},"PeriodicalIF":2.4,"publicationDate":"2025-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144905614","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

Cover 封面

IF 2.2 4区地球科学

Meteoritics & Planetary Science Pub Date : 2025-05-09 DOI: 10.1111/maps.14203

引用次数: 0

Textural coarsening as the cause for impact-melt like plagioclase crystal size distributions and subtle layering in high-Al basalt 14053 高铝玄武岩14053中冲击熔体样斜长石晶粒尺寸分布和细微分层的织构粗化原因

IF 2.2 4区地球科学

Meteoritics & Planetary Science Pub Date : 2025-05-07 DOI: 10.1111/maps.14362

Stu Webb, Clive R. Neal, Bridget Guiza, James M. D. Day

{"title":"Textural coarsening as the cause for impact-melt like plagioclase crystal size distributions and subtle layering in high-Al basalt 14053","authors":"Stu Webb, Clive R. Neal, Bridget Guiza, James M. D. Day","doi":"10.1111/maps.14362","DOIUrl":"https://doi.org/10.1111/maps.14362","url":null,"abstract":"High-Al Apollo 14 basalt 14053 has been identified as an endogenous partial melt product from the lunar interior based on geochemical analyses, specifically low abundances of highly siderophile elements, but exhibits textural characteristics similar to those of impact melts. Prior studies of this sample have described mineralogical differences between “interior” and “exterior” portions, which have been attributed to exposure at the lunar surface and subsequent metamorphism through subsolidus reheating within or in proximity to an impact-ejecta blanket. It has been demonstrated that quantitative textural analysis is a useful tool for distinguishing between lunar rocks altered by impact processes and those produced by endogenic magmatic processes. Such an approach is used in this study to analyze multiple thin sections cut from interior and exterior portions of 14053. The textural heterogeneity of plagioclase crystals among thin sections revealed in this study suggests that an impact-ejecta blanket likely impinged on the western side of 14053. This thermal metamorphism coarsened the plagioclase grains within that portion of 14053 so intensely that components diffused to form subtle layering and moderate textural heterogeneity that was quantifiable. These results also support previous conclusions that suggest the differences in reduction textures within this sample are due to the limited penetration depth of solar-wind implanted hydrogen prior to reheating. Thermal metamorphism can produce textural changes in lunar samples even if below the solidus temperature, such that the plagioclase texture of an endogenous basalt is sufficiently altered to that resembling an impact melt. These results highlight the significance of quantitative petrographic observations of lunar samples to reveal important petrogenetic information that has to be placed in proper spatial context to be understood.","PeriodicalId":18555,"journal":{"name":"Meteoritics & Planetary Science","volume":"60 6","pages":"1411-1420"},"PeriodicalIF":2.2,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/maps.14362","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144292420","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

Multiple CV chondrite lithologies in Camel Donga 003 (CK3): Implications for the CV and CK parent bodies 骆驼东亚003 （CK3）中多个CV球粒陨石岩性：对CV和CK母体的影响

IF 2.2 4区地球科学

Meteoritics & Planetary Science Pub Date : 2025-05-06 DOI: 10.1111/maps.14358

Elana G. Alevy, Tasha L. Dunn, Alexander N. Krot, Paul Cardon-Pilotaz, Juliane Gross

{"title":"Multiple CV chondrite lithologies in Camel Donga 003 (CK3): Implications for the CV and CK parent bodies","authors":"Elana G. Alevy, Tasha L. Dunn, Alexander N. Krot, Paul Cardon-Pilotaz, Juliane Gross","doi":"10.1111/maps.14358","DOIUrl":"https://doi.org/10.1111/maps.14358","url":null,"abstract":"Camel Donga 003 (CD 003) was originally classified as a CK3 chondrite based on its coarse-grained matrix, Ni-rich sulfides, Cr-rich magnetite, and CK-like silicate mineralogy. However, after preliminary backscattered electron imaging and elemental mapping of a 400 mm2 thin section of CD 003, subsequent mineral chemistry analysis confirmed that the sample is a fragmental breccia consisting of three oxidized CV lithologies. In the two largest lithologies, both mineralogically pristine and metasomatically altered refractory inclusions are commonly found in close proximity to one another. This suggests that brecciation and mixing of different lithologies in CD 003 occurred on a submillimeter scale. The least abundant lithology—an 8 × 3 mm clast—is distinguished from the other lithologies by its recrystallized matrix, poorly defined chondrules, and equilibrated olivine (Fa42). The homogeneity of matrix and chondrule olivine indicates that this lithology has been metamorphosed to at least petrologic subtype 3.8 conditions. We can trace the provenance of our sample to the main mass of CD 003, which must contain the CK material described in its original classification. Therefore, the presence of the three oxidized CV lithologies suggests that CD 003 is the first CV/CK3 chondrite breccia.","PeriodicalId":18555,"journal":{"name":"Meteoritics & Planetary Science","volume":"60 6","pages":"1336-1364"},"PeriodicalIF":2.2,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144291923","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

A complete inventory of institutional and public meteorite collections in Switzerland 瑞士机构和公共陨石收藏的完整清单

IF 2.2 4区地球科学

Meteoritics & Planetary Science Pub Date : 2025-05-06 DOI: 10.1111/maps.14361

J. Eschrig, M. M. M. Meier, B. A. Hofmann

{"title":"A complete inventory of institutional and public meteorite collections in Switzerland","authors":"J. Eschrig, M. M. M. Meier, B. A. Hofmann","doi":"10.1111/maps.14361","DOIUrl":"https://doi.org/10.1111/maps.14361","url":null,"abstract":"Museums and universities are important for collecting, maintaining, and curating meteorites. To make specimens known and available for research, inventorying and optimal curation are important. However, not all meteorite collections are well curated, especially in smaller institutions. During a 12-month project supported by the Swiss Confederacy under the “SwissCollNet” framework, we viewed, photographed, and inventoried all public and institutional meteorite collections in Switzerland. In total, the 27 collections contain 7616 specimens, derived from 3469 different meteorites. New, switched, and missing specimens were found in many collections. More than half of the collections contained specimens without inventory numbers and unknown or unofficial specimens, several of which could be assigned to a known meteorite fall or find during this project. The identification of switched or unknown samples was done using handheld X-ray fluorescence spectrometry and magnetic susceptibility measurements. In total, 201 specimens were attributed a preliminary classification. We demonstrate the importance of smaller collections, which often hold fragments of rare meteorite types. We underline how large-scale projects like the one presented here allow for unique data, for example, finding specimens missing from one collection in another. By tracking the origin of specimens using historic labels, we show that the history of meteoritics is reflected in the composition of the Swiss collections. During the inventorying process, several prehistoric and modern artifacts made of meteoritic material were found, underlining the potential of analyzing non-geological specimens in museums.","PeriodicalId":18555,"journal":{"name":"Meteoritics & Planetary Science","volume":"60 6","pages":"1384-1410"},"PeriodicalIF":2.2,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/maps.14361","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144291924","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