Chemical and genetic characterization of the ungrouped pallasite Lieksa
dc.contributor.author | Chiappe, Emily M. | |
dc.contributor.author | Ash, Richard D. | |
dc.contributor.author | Luttinen, Arto | |
dc.contributor.author | Lukkari, Sari | |
dc.contributor.author | Kuva, Jukka | |
dc.contributor.author | Hilton, Connor D. | |
dc.contributor.author | Walker, Richard J. | |
dc.date.accessioned | 2024-06-27T17:58:34Z | |
dc.date.available | 2024-06-27T17:58:34Z | |
dc.date.issued | 2023-11-03 | |
dc.description.abstract | The 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.uri | https://doi.org/10.1111/maps.14095 | |
dc.identifier | https://doi.org/10.13016/ywbw-etqf | |
dc.identifier.citation | Chiappe, 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.uri | http://hdl.handle.net/1903/32751 | |
dc.language.iso | en_US | |
dc.publisher | Wiley | |
dc.relation.isAvailableAt | College of Computer, Mathematical & Natural Sciences | en_us |
dc.relation.isAvailableAt | Geology | en_us |
dc.relation.isAvailableAt | Digital Repository at the University of Maryland | en_us |
dc.relation.isAvailableAt | University of Maryland (College Park, MD) | en_us |
dc.title | Chemical and genetic characterization of the ungrouped pallasite Lieksa | |
dc.type | Article | |
local.equitableAccessSubmission | No |
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