> Details

MacPherson, Glenn J.; Andronicos, Christopher L.; Bindi, Luca; Distler, Vadim V.; Eddy, Michael P.; Eiler, John M.; Guan, Yunbin; Hollister, Lincoln S.; Kostin, Alexander; Kryachko, Valery; Steinhardt, William M.; Yudovskaya, Marina; Steinhardt, Paul J.

Khatyrka, a new CV3 find from the Koryak Mountains, Eastern Russia

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  • Media type: E-Article
  • Title: Khatyrka, a new CV3 find from the Koryak Mountains, Eastern Russia
  • Contributor: MacPherson, Glenn J.; Andronicos, Christopher L.; Bindi, Luca; Distler, Vadim V.; Eddy, Michael P.; Eiler, John M.; Guan, Yunbin; Hollister, Lincoln S.; Kostin, Alexander; Kryachko, Valery; Steinhardt, William M.; Yudovskaya, Marina; Steinhardt, Paul J.
  • imprint: Wiley, 2013
  • Published in: Meteoritics & Planetary Science
  • Language: English
  • DOI: 10.1111/maps.12170
  • ISSN: 1086-9379; 1945-5100
  • Keywords: Space and Planetary Science ; Geophysics
  • Origination:
  • Footnote:
  • Description: <jats:title>Abstract</jats:title><jats:p>A new meteorite find, named Khatyrka, was recovered from eastern Siberia as a result of a search for naturally occurring quasicrystals. The meteorite occurs as clastic grains within postglacial clay‐rich layers along the banks of a small stream in the Koryak Mountains, Chukotka Autonomous Okrug of far eastern Russia. Some of the grains are clearly chondritic and contain Type <jats:styled-content style="fixed-case">IA</jats:styled-content> porphyritic olivine chondrules enclosed in matrices that have the characteristic platy olivine texture, matrix olivine composition, and mineralogy (olivine, pentlandite, nickel‐rich iron‐nickel metal, nepheline, and calcic pyroxene [diopside‐hedenbergite solid solution]) of oxidized‐subgroup <jats:styled-content style="fixed-case">CV</jats:styled-content>3 chondrites. A few grains are fine‐grained spinel‐rich calcium‐aluminum‐rich inclusions with mineral oxygen isotopic compositions again typical of such objects in <jats:styled-content style="fixed-case">CV</jats:styled-content>3 chondrites. The chondritic and <jats:styled-content style="fixed-case">CAI</jats:styled-content> grains contain small fragments of metallic copper‐aluminum‐iron alloys that include the quasicrystalline phase icosahedrite. One grain is an achondritic intergrowth of Cu‐Al metal alloys and forsteritic olivine ± diopsidic pyroxene, both of which have meteoritic (<jats:styled-content style="fixed-case">CV</jats:styled-content>3‐like) oxygen isotopic compositions. Finally, some grains consist almost entirely of metallic alloys of aluminum + copper ± iron. The Cu‐Al‐Fe metal alloys and the alloy‐bearing achondrite clast are interpreted to be an accretionary component of what otherwise is a fairly normal <jats:styled-content style="fixed-case">CV</jats:styled-content>3 (oxidized) chondrite. This association of <jats:styled-content style="fixed-case">CV</jats:styled-content>3 chondritic grains with metallic copper‐aluminum alloys makes Khatyrka a unique meteorite, perhaps best described as a complex <jats:styled-content style="fixed-case">CV</jats:styled-content>3 (ox) breccia.</jats:p>
  • Access State: Open Access