Accès ouvert
2025
article
OpenAlex
Laura E. Jenkins, A. J. King, Martin Lee, Luke Daly et autres
Dehydroxylate I, a product of the thermal decomposition of serpentine, has been observed in heated carbonaceous chondrite meteorites. To better understand the occurrence of dehydroxylate I on carbonaceous asteroids, we have experimentally heated the carbonaceous chondrite Murchison from 400 to 550 °C …
gb, au
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2025
article
OpenAlex
Martin Lee, Cameron J. Floyd, Sammy Griffin
Abstract Xenoliths in carbonaceous chondrites include lithologies that are unrepresented in the meteorite record and so are a rich source of information on asteroid diversity. Cold Bokkeveld is a CM2 regolith breccia that contains both hydrous and anhydrous lithic clasts. Here, we …
gb
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2025
article
OpenAlex
Cameron J. Floyd, Laura E. Jenkins, Pierre-Etienne M. C. Martin, Luke Daly et autres
Abstract CM chondrites have been subjected to numerous alteration processes including brecciation and ductile deformation. Here, we present the results of 2D and 3D petrofabric analysis across a suite of meteorites: Aguas Zarcas, Cold Bokkeveld, Lewis Cliff (LEW) 85311, Murchison, and Winchcombe. …
gb, au
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Accès ouvert
2024
article
OpenAlex
Laura E. Jenkins, Martin Lee, Luke Daly, A. J. King et autres
Abstract The alignment of non‐spherical “flattened” chondrules into a petrofabric is a common feature of hydrated carbonaceous chondrite meteorites. This texture can form as a result of impacts at peak shock pressures exceeding 10 GPa. However, many carbonaceous chondrites with petrofabrics are …
gb, au
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Accès ouvert
2024
article
OpenAlex
Martin Lee, Luke Daly, Jennika Greer, Sammy Griffin et autres
Abstract Many of the CM carbonaceous chondrites are regolith breccias and so should have abundant evidence for collisional processing. The constituent clasts of these fragmental rocks frequently display compactional petrofabrics; yet, olivine microstructures show that most CMs are unshocked. To better understand …
gb, au
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Accès ouvert
2024
article
OpenAlex
Cameron J. Floyd, Santiago Benito, Pierre-Etienne M. C. Martin, Laura E. Jenkins et autres
Abstract The sizes of chondrules are a valuable tool for understanding relationships between meteorite groups and the affinity of ungrouped chondrites, documenting temporal/spatial variability in the solar nebula, and exploring the effects of parent body processing. Many of the recently reported sizes …
gb, de, us, au
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Accès ouvert
2024
article
OpenAlex
Luke Daly, Martin D. Suttle, Martin Lee, John Bridges et autres
Abstract The Mighei‐like carbonaceous (CM) chondrites have been altered to various extents by water–rock reactions on their parent asteroid(s). This aqueous processing has destroyed much of the primary mineralogy of these meteorites, and the degree of alteration is highly heterogeneous at both …
au, gb, us, de, fr
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Accès ouvert
2023
article
OpenAlex
Martin Lee, Cameron J. Floyd, Pierre-Etienne M. C. Martin, Xuchao Zhao et autres
Abstract LaPaz Icefield (LAP) 02239 is a mildly aqueously altered CM2 carbonaceous chondrite that hosts a xenolith from a primitive chondritic parent body. The xenolith contains chondrules and calcium‐ and aluminum‐rich inclusions (CAIs) in a very fine‐grained matrix. The chondrules are comparable …
gb
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Accès ouvert
2023
article
OpenAlex
Laura E. Jenkins, Martin Lee, Luke Daly, A. J. King et autres
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 …
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2022
article
OpenAlex
Martin D. Suttle, Luke Daly, R. H. Jones, Laura E. Jenkins et autres
Abstract The Winchcombe meteorite is a CM chondrite breccia composed of eight distinct lithological units plus a cataclastic matrix. The degree of aqueous alteration varies between intensely altered CM2.0 and moderately altered CM2.6. Although no lithology dominates, three heavily altered rock types …
gb, au, us, fr
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Accès ouvert
2022
article
OpenAlex
A. J. King, Luke Daly, James Benedict Rowe, Katherine Helen Joy et autres
Direct links between carbonaceous chondrites and their parent bodies in the solar system are rare. The Winchcombe meteorite is the most accurately recorded carbonaceous chondrite fall. Its pre-atmospheric orbit and cosmic-ray exposure age confirm that it arrived on Earth shortly after ejection …
gb, au, ca, fr, sk, it, us, hu, in
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Accès ouvert
2022
article
OpenAlex
Áine Clare O'Brien, A. E. Pickersgill, Luke Daly, Laura E. Jenkins et autres
Abstract It was the first UK meteorite fall for 30 years. Here we gather the story of a remarkable community hunt involving pandemic precautions, social media spikes and some very lucky guinea pigs.
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