Insights into L4 ordinary chondrites from the Gueltat Zemmour fall, Morocco: Modal mineralogy, chondrule characteristics, and magnetic signatures

1,2E. El Hachimi, 1,2H. Chennaoui Aoudjehane, 3S. Russell, 4B. Devouard, 4J. Gattacceca
Journal of African Earth Sciences, 234, 105944
Link to Article [DOI: 10.1016/j.jafrearsci.2025.105944]
1GEOPEN Laboratory, Hassan II University of Casablanca, Faculty of Science Ain Chock, km 8 Route d’El Jadida, 20150, Casablanca, Morocco
2ATTARIK Foundation for Meteoritics and Planetary Science, Casablanca, Morocco
3Planetary Materials Group, The Natural History Museum, Cromwell Road, London, SW7 5BD, UK
4Aix Marseille Univ, CNRS, IRD, INRAE, CEREGE, Aix-en-Provence, France

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Assessing the metal and rare earth element mining potential of undifferentiated asteroids through the study of carbonaceous chondrites

1,2J. M. Trigo-Rodríguez, 1,2P. Grèbol-Tomàs, 3J. Ibáñez-Insa, 4J. Alonso-Azcárate, 5,6M. Gritsevich
Monthly Notices of the Royal Astronomical Society, 545, 1–15
Link to Article [DOI: 10.1093/mnras/staf1902]
1Institut de Ciències de l’Espai (ICE, CSIC), Campus UAB, Carrer de Can Magrans S/N, Cerdanyola del Vallès, E-08193 Barcelona, Catalonia, Spain
2Institut d’Estudis Espacials de Catalunya (IEEC), Esteve Terradas 1, Edifici RDIT, Of. 212, Parc Mediterrani de la Tecnologia (PMT), Campus del Baix Llobregat–UPC, Castelldefels, E-08860 Barcelona, Catalonia, Spain
3Geociències Barcelona (GEO3BCN-CSIC), Carrer de Lluís Solé i Sabarís, 1, E-08028 Barcelona, Catalonia, Spain
4Universidad de Castilla-La Mancha (UCLM), Facultad CC Ambientales y Bioquímica, Campus Fábrica de Armas, E-45071 Toledo, Castilla-La Mancha, Spain
5Faculty of Science, University of Helsinki, Gustaf Hällströmin katu 2, FI-00014 Helsinki, Finland
6Institute of Physics and Technology, Ural Federal University, Mira str. 19, 620002 Ekaterinburg, Russia

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Diaphite nanostructures, stacking faults, and twins in Almahata Sitta ureilitic diamonds

1,2Anna Barbaro, 1,3Fabrizio Nestola, 4,5Péter Németh, 2Sheryl A. Singerling, 1,6Yanjuan Wang, 2Frank E. Brenker
Carbon (in Press)
Open Access Link to Article [DOI: 10.1016/j.carbon.2026.122098]
1Department of Geosciences, University of Padova, Padova, 35131, Italy
2Schwiete Cosmochemistry Laboratory, Department of Geoscience, Goethe University, Frankfurt, 60438, Germany
3Centro di Ateneo per i Musei, University of Padova, Padova, 35121, Italy
4Institute for Geological and Geochemical Research, HUN-REN Research Centre for Astronomy and Earth Sciences, MTA Centre of Excellence, Budapest, 1112, Hungary
5Research Institute of Biomolecular and Chemical Engineering, University of Pannonia, Veszprém, 8200, Hungary
6State Key Laboratory of Deep Earth and Mineral Exploration, Chinese Academy of Geological Sciences, Beijing, 100037, China

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Data-driven classification of ordinary chondrites and asteroidal metal potential evaluation

1,2Tian-Yu Liu, 2,3Si-Jia Wei, 4Ke-Li Shi, 5Tian-Qi Qiu, 6Jun-Zhe Teng, 1Zheng-Jie Qiu
Scientific Reports (in Press)
Open Access Link to Article [DOI: 10.1038/s41598-026-35624-0]
1State Key Laboratory of Lithospheric and Environmental Coevolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 100029, China
2College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
3Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 100029, China
4Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing, 100094, China
5Maynooth International Engineering College, Fuzhou University, Fuzhou, 350116, China
6School of Ecology and Environment, Tibet University, Lhasa, 850000, China

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Shaken, not stirred: Inefficient mixing of CM- and CI-like materials

1,2S. E. Anderson, 2P. Vernazza, 3M. Brož
Astronomy & Astrophysics, 709, A8
Open Access Link to Article [DOI: 10.1051/0004-6361/202557394]
1CNRS, Observatoire de la Côte d’Azur, Laboratoire J.-L. Lagrange, Université Côte d’Azur, CS 34229, 06304 Nice, France
2Aix-Marseille University, CNRS, CNES, LAM, Institut Origines, 38 rue Frederic Joliot Curie, 13388 Marseille, France
3Charles University, Faculty of Mathematics and Physics, Institute of Astronomy, 18200 V Holešovičkách 2, Czech Republic

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Chronology and composition of lunar mare basalts in Maria Undarum and Spumans

1,2Jingdong Zhang, 1Yuzheng Zhang, 1Jian Chen, 3,2Luyuan Xu, 1,2Le Qiao
Icarus, (in Press), 117372 Link to Article [DOI: 10.1016/j.icarus.2026.117372]

1Shandong Key Laboratory of Space Environment and Exploration Technology, School of Space Science and Technology, Institute of Space Sciences, Shandong University, Weihai, Shandong, 264209, China
2State Key Laboratory of Lunar and Planetary Sciences, Macau University of Science and Technology, Macau, China
3International Institute for Interdisciplinary and Frontiers, Beihang University, Beijing 100191, China
Copyright Elsevier

Investigations of the ages and compositions of lunar volcanic deposits
provide insights into the geologic and thermal evolution of the Moon. Among the 22
recognized lunar maria, the majority have been chronologically studied, and Maria
Undarum and Spumans remain the two major maria that lack reliable age constraints.
In this work, 66 undated mare basalt units were delineated in the two maria and adjacent
regions. Our analysis reveals that the absolute model ages (AMAs) of these 66 basalt
units range from 2.9 to 3.8 Ga. Additionally, noticeable heterogeneity in surface
composition is observed among these mare units. Combining characteristics of regional
volcanic flux and mare composition, we suggest a gradual decline in volcanic activity
after the main phase of volcanism, with older units (3.8–3.5 Ga) generally exhibiting
greater exposed basalt volumes than younger units (3.4–2.9 Ga). The AMAs of these
maria show weak negative correlations with their surface FeO and TiO2 abundances,
although neither relationship is statistically significant. Younger basalts are dominated
by relatively lower titanium contents and have a narrower variety in iron contents than
older basalts. Furthermore, we constrain the lower limit of the basalt thickness in this
region, ranging from ~41 m to 207 m. Systematic investigation of the age, composition,
basalt thickness, and volumetric flux of the Maria Undarum and Spumans region
demonstrates that small-scale volcanic eruptions outside major impact basins are
generally very ancient (>3.5 Ga), and are characterized by short durations, irregular
mare outlines, small eruptive volumes, and emplacement in depressions in highland
terrains.