Chemical and genetic characterization of the ungrouped pallasite Lieksa

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dc.contributor.authorChiappe, Emily M.
dc.contributor.authorAsh, Richard D.
dc.contributor.authorLuttinen, Arto
dc.contributor.authorLukkari, Sari
dc.contributor.authorKuva, Jukka
dc.contributor.authorHilton, Connor D.
dc.contributor.authorWalker, Richard J.
dc.date.accessioned2024-06-27T17:58:34Z
dc.date.available2024-06-27T17:58:34Z
dc.date.issued2023-11-03
dc.description.abstractThe meteorite Lieksa was found in 2017 in Löpönvaara, Finland, and later donated to the Finnish Museum of Natural History. Here, we report siderophile element concentrations, genetic isotopic data, and a metal–silicate segregation age for the meteorite. The ~280 g Lieksa is ~80% metal and ~20% silicate and oxide inclusions by volume, with the inclusions consisting primarily of Fe-rich olivine. Due to Lieksa's silicate content, coupled with a texture characterized by metal enclosing the silicates, it has been classified as a pallasite. Lieksa's olivine and bulk chemical characteristics are distinct from those of the known pallasite and iron meteorite groups, consistent with its classification as ungrouped. The meteorite exhibits a flat, chondrite-normalized highly siderophile element pattern, consistent with an origin as an early crystallization product from a metallic melt with chondritic relative abundances. Molybdenum, Ru, and 183W isotopic data indicate that Lieksa formed in the non-carbonaceous (NC) domain of the solar nebula. Radiogenic 182W abundances for Lieksa yield a model metal–silicate segregation age of 1.5 ± 0.8 Myr after calcium-aluminum-rich inclusion formation, which is within the range established for other NC-type pallasite and iron meteorite parent bodies.
dc.description.urihttps://doi.org/10.1111/maps.14095
dc.identifierhttps://doi.org/10.13016/ywbw-etqf
dc.identifier.citationChiappe, E.M., Ash, R.D., Luttinen, A., Lukkari, S., Kuva, J., Hilton, C.D. and Walker, R.J. (2023), Chemical and genetic characterization of the ungrouped pallasite Lieksa. Meteorit Planet Sci, 58: 1747-1759.
dc.identifier.urihttp://hdl.handle.net/1903/32751
dc.language.isoen_US
dc.publisherWiley
dc.relation.isAvailableAtCollege of Computer, Mathematical & Natural Sciencesen_us
dc.relation.isAvailableAtGeologyen_us
dc.relation.isAvailableAtDigital Repository at the University of Marylanden_us
dc.relation.isAvailableAtUniversity of Maryland (College Park, MD)en_us
dc.titleChemical and genetic characterization of the ungrouped pallasite Lieksa
dc.typeArticle
local.equitableAccessSubmissionNo

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