Winchcombe: An example of rapid terrestrial alteration of a CM chondrite
Rattachement africain : gb, au. Niveau de preuve : code pays fourni par la source.
Le résumé fourni par la source
Abstract Winchcombe is a CM chondrite that fell in England on February 28, 2021. Its rapid retrieval was well characterized. Within two polished sections of Winchcombe, terrestrial phases were observed. Calcite and calcium sulfates were found in a sample recovered from a field on March 6, 2021, and halite was observed on a sample months after its recovery from a driveway on March 2, 2021. These terrestrial phases were characterized by scanning electron microscopy, Raman spectroscopy, and transmission electron microscopy. Calcite veins crosscut the fusion crust and therefore postdate it. The calcite likely precipitated in the damp environment (sheep field) where the meteorite lay for six days prior to its retrieval. The sulfates occur on the edges of the sample and were identified as three minerals: gypsum, bassanite, and anhydrite. Given that the sulfates occur only on the sample's edges, including on top of the fusion crust, they formed after Winchcombe fell. Sulfate precipitation is attributed to the damp fall environment, likely resulted from sulfide‐derived H 2 S reacting with calcite within the meteorite. Halite occurs as euhedral crystals only on the surface of a polished section and exclusively in areas relatively enriched in sodium. It was likely produced by the interaction of the polished rock slice with the humid laboratory air over a period of months. The sulfates, fusion crust calcite, and halite all post‐date Winchcombe's entry into the Earth's atmosphere and showcase how rapidly meteorite falls can be terrestrially altered.
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Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé, mais le titre doit être comparé manuellement.
- Titre Crossref
- Winchcombe: An example of rapid terrestrial alteration of a <scp>CM</scp> chondrite
- Date Crossref
- 09/02/2023
- Éditeur
- Wiley
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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University of Glasgow pays non établi dans la noticeUniversité ou école supérieure
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The University of Sydney Australian Centre for Microscopy and Microanalysis pays non établi dans la noticeUniversité ou école supérieure
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Curtin University Space Science and Technology Centre pays non établi dans la noticeUniversité ou école supérieure
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Natural History Museum pays non établi dans la noticeInstitution
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Imperial College London Department of Earth Science and Engineering pays non établi dans la noticeUniversité ou école supérieure
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School of Geographical and Earth Sciences pays non établi dans la noticeUniversité ou école supérieure
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School of Earth and Planetary Sciences Space Science and Technology Centre pays non établi dans la noticeUniversité ou école supérieure
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Planetary Materials Group pays non établi dans la noticeInstitution
University of Glasgow, Australian Centre for Microscopy and Microanalysis — The University of Sydney et Space Science and Technology Centre — Curtin University, avec 5 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.