Show simple item record

dc.contributor.authorSuttle, MD
dc.contributor.authorTwegar, K
dc.contributor.authorNava, J
dc.contributor.authorSpiess, R
dc.contributor.authorSpratt, J
dc.contributor.authorCampanale, F
dc.contributor.authorFolco, L
dc.date.accessioned2020-02-10T11:58:36Z
dc.date.available2020-02-10T11:58:36Z
dc.date.issued2019-08-27
dc.date.submitted2020-02-06
dc.identifier.citationSuttle, M.D., Twegar, K., Nava, J. et al. A unique CO-like micrometeorite hosting an exotic Al-Cu-Fe-bearing assemblage – close affinities with the Khatyrka meteorite. Sci Rep 9, 12426 (2019). https://doi.org/10.1038/s41598-019-48937-0en_US
dc.identifier.doi10.1038/s41598-019-48937-0
dc.identifier.urihttp://hdl.handle.net/10141/622622
dc.description.abstractWe report the discovery of a unique micrometeorite, containing an exotic Al-Cu-Fe alloy composed of two intermixed phases: khatyrkite (CuAl2) and stolperite (CuAl) and both containing minor Fe (<1.4 wt%). These phases are dendritic and rapidly co-crystallized at the binary system’s peritectic (~550 °C). The host micrometeorite is an otherwise typical S-type micro-porphyritic cosmic spherule containing relict olivine (Fo76–90, Cr2O3: 0.01–0.56 wt%, MnO: 0.03–0.32 wt% and CaO: 0.09–0.22 wt%) and a cumulate layered texture. These properties suggest the micrometeorite is derived from a carbonaceous chondrite (best matched to a CO chondrite) and entered the atmosphere a high speed (~16 kms−1), implying an origin from a highly eccentric orbit. This particle represents the second independent discovery of naturally occurring intermetallic Al-Cu-Fe alloys and is thus similar to the previously reported Khatyrka meteorite - a CV chondrite containing near-identical alloys and the only known natural quasicrystals. We did not observe quasicrystalline phases in this micrometeorite, likely due to the low amounts of Fe in the alloy, insufficient to stabilize quasicrystals. Our discovery confirms the existence of Al-Cu-Fe intermetallic alloys on chondritic parent bodies. These unusual phases require a currently unexplained formation process, we tentatively suggest this could represent the delivery of exotic interstellar material to the inner solar system via impact.en_US
dc.language.isoenen_US
dc.publisherSpringer Science and Business Media LLCen_US
dc.rightsopenAccessen_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.titleA unique CO-like micrometeorite hosting an exotic Al-Cu-Fe-bearing assemblage – close affinities with the Khatyrka meteoriteen_US
dc.typeJournal Articleen_US
dc.identifier.eissn2045-2322
dc.identifier.journalScientific Reportsen_US
dc.identifier.volume9en_US
dc.identifier.issue1en_US
pubs.organisational-group/Natural History Museum
pubs.organisational-group/Natural History Museum/Science Group
pubs.organisational-group/Natural History Museum/Science Group/Core Research Laboratories
pubs.organisational-group/Natural History Museum/Science Group/Core Research Laboratories/Imaging and Analysis Centre (IAC)
pubs.organisational-group/Natural History Museum/Science Group/Functional groups
pubs.organisational-group/Natural History Museum/Science Group/Functional groups/Facilities Support
dc.embargoNot knownen_US
elements.import.authorSuttle, MDen_US
elements.import.authorTwegar, Ken_US
elements.import.authorNava, Jen_US
elements.import.authorSpiess, Ren_US
elements.import.authorSpratt, Jen_US
elements.import.authorCampanale, Fen_US
elements.import.authorFolco, Len_US
dc.description.nhm© Te Author(s) 2019. Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. Te images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.en_US
dc.subject.nhmEarly solar systemen_US
dc.subject.nhmGeochemistryen_US
dc.subject.nhmMineralogyen_US
dc.subject.nhmPetrologyen_US
refterms.dateFOA2020-02-10T11:58:37Z


Files in this item

Thumbnail
Name:
A unique CO-like micrometeorite ...
Size:
2.033Mb
Format:
PDF
Description:
Published/publisher's PDF version
Thumbnail
Name:
41598_2019_48937_MOESM1_ESM.pdf
Size:
553.1Kb
Format:
PDF
Description:
Supporting information

This item appears in the following Collection(s)

Show simple item record

openAccess
Except where otherwise noted, this item's license is described as openAccess