Aubrites are a group of meteorites named for Aubres, a small achondrite meteorite that fell near Nyons, France, in 1836. They are primarily composed of the orthopyroxeneenstatite and are often called enstatite achondrites. Their igneous origin separates them from primitive enstatite achondrites and means they originated in an asteroid.
Aubrites are typically light-colored with a brownish fusion crust. Most aubrites are heavily brecciated; they are often said to look "lunar" in origin.
Aubrites are primarily composed of large white crystals of the Fe-poor, Mg-rich orthopyroxene, or enstatite, with minor phases of olivine, nickel-iron metal, and troilite, indicating a magmatic formation under extremely reducing conditions. The severe brecciation of most aubrites attests to a violent history for their parent body. Since some aubrites contain chondritic xenoliths, it is likely that the aubrite parent body collided with an asteroid of "F-chondritic" composition.
Comparisons of aubrite spectra to the spectra of asteroids have revealed striking similarities between the aubrite group and the E-type asteroids of the Nysa family. A small near-Earth object, 3103 Eger, is also often suggested as the parent body of the aubrites.[1]
It has been suggested that aubrites may originate from the planet Mercury.[2]
^Gaffey, Michael J.; Reed, Kevin L.; Kelley, Michael S. (November 1992). "Relationship of E-type Apollo asteroid 3103 (1982 BB) to the enstatite achondrite meteorites and the Hungaria asteroids". Icarus. 100 (1): 95–109. doi:10.1016/0019-1035(92)90021-X. Retrieved 14 May 2021.
^O'Callaghan, Jonathan (23 May 2022). "Shards of the Planet Mercury May Be Hiding on Earth". The New York Times. Retrieved 14 February 2023.
aubrite, album, album, this, article, needs, additional, citations, verification, please, help, improve, this, article, adding, citations, reliable, sources, unsourced, material, challenged, removed, find, sources, news, newspapers, books, scholar, jstor, marc. For the album see Aubrite album This article needs additional citations for verification Please help improve this article by adding citations to reliable sources Unsourced material may be challenged and removed Find sources Aubrite news newspapers books scholar JSTOR March 2009 Learn how and when to remove this template message Aubrites are a group of meteorites named for Aubres a small achondrite meteorite that fell near Nyons France in 1836 They are primarily composed of the orthopyroxene enstatite and are often called enstatite achondrites Their igneous origin separates them from primitive enstatite achondrites and means they originated in an asteroid Aubrite Group Cumberland Falls an aubriteTypeAchondriteClassAsteroidal achondrite or enstatite achondriteParent bodyPossibly 3103 EgerShallowater meteorite an aubriteAubrites are typically light colored with a brownish fusion crust Most aubrites are heavily brecciated they are often said to look lunar in origin Aubrites are primarily composed of large white crystals of the Fe poor Mg rich orthopyroxene or enstatite with minor phases of olivine nickel iron metal and troilite indicating a magmatic formation under extremely reducing conditions The severe brecciation of most aubrites attests to a violent history for their parent body Since some aubrites contain chondritic xenoliths it is likely that the aubrite parent body collided with an asteroid of F chondritic composition Comparisons of aubrite spectra to the spectra of asteroids have revealed striking similarities between the aubrite group and the E type asteroids of the Nysa family A small near Earth object 3103 Eger is also often suggested as the parent body of the aubrites 1 It has been suggested that aubrites may originate from the planet Mercury 2 See also editGlossary of meteoritics 3103 Eger 44 NysaReferences edit Gaffey Michael J Reed Kevin L Kelley Michael S November 1992 Relationship of E type Apollo asteroid 3103 1982 BB to the enstatite achondrite meteorites and the Hungaria asteroids Icarus 100 1 95 109 doi 10 1016 0019 1035 92 90021 X Retrieved 14 May 2021 O Callaghan Jonathan 23 May 2022 Shards of the Planet Mercury May Be Hiding on Earth The New York Times Retrieved 14 February 2023 External links edit nbsp Wikimedia Commons has media related to Aubrites http www daviddarling info encyclopedia A aubrite html http www lpi usra edu meetings lpsc2004 pdf 1812 pdf https www uni muenster de imperia md content planetologie pdf bischoff mess ii endversion pdf Retrieved from https en wikipedia org w index php title Aubrite amp oldid 1189531899, wikipedia, wiki, book, books, library,
