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

MacPherson, Glenn J. and Andronicos, Christopher L. and Bindi, Luca and Distler, Vadim V. and Eddy, Michael P. and Eiler, John M. and Guan, Yunbin and Hollister, Lincoln S. and Kostin, Alexander and Kryachko, Valery and Steinhardt, William M. and Yudovskaya, Marina and Steinhardt, Paul J. (2013) Khatyrka, a new CV3 find from the Koryak Mountains, Eastern Russia. Meteoritics and Planetary Science, 48 (8). pp. 1499-1514. ISSN 1086-9379.

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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 IA 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 CV3 chondrites. A few grains are fine-grained spinel-rich calcium-aluminum-rich inclusions with mineral oxygen isotopic compositions again typical of such objects in CV3 chondrites. The chondritic and CAI 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 (CV3-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 CV3 (oxidized) chondrite. This association of CV3 chondritic grains with metallic copper-aluminum alloys makes Khatyrka a unique meteorite, perhaps best described as a complex CV3 (ox) breccia.

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Bindi, Luca0000-0003-1168-7306
Guan, Yunbin0000-0002-7636-3735
Additional Information:© 2013 Published. This article is a U.S. Government work and is in the public domain in the USA. Received 15 October 2012; revision accepted 23 May 2013. Article first published online: 2 Aug 2013. The expedition to Chukotka was supported by a grant from an anonymous donor to Princeton University (PJS, Principal Investigator). The research was supported, in part, by the NSF MRSEC program through New York University (grant DMR-0820341; PJS); the MIUR, PRIN 2009 project “Modularity, microstructures and non-stoichiometry in minerals” (LB); and the Chairman’s Discretionary Fund, Dept. of Mineral Sciences, SI (GJM). We have benefitted from comments and many contributions to detailed imaging studies of the samples by N. Yao. The expedition was enabled by a co-operative agreement between Princeton University and the Institute of Geology of Ore Deposits, Mineralogy, Petrography and Geochemistry (IGEM) of the Russian Academy of Science (RAS). The expedition also hugely benefitted from the logistical aid provided by Olga Komelkova, Victor Komelkov, and Bogdan Makovskii, all from Anadyr, who organized and provided all transportation and provisions both in base camp in the Koryak Mountains and en route between the base camp and Anadyr. We also are grateful to Prof. A. J. T. Jull, George Burr, and the rest of the team at the Accelerator Mass Spectrometry Laboratory, University of Arizona, for their excellent work in producing the 14C age dates of the blue clay layer. Finally, this manuscript benefitted greatly from constructive reviews by Drs. Michael Weisberg, Misha Petaev, and Associate Editor Adrian Brearley. Editorial Handling—Dr. Adrian Brearley
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Ministero dell'Istruzione, dell'Università e della Ricerca (MIUR)UNSPECIFIED
Dept. Mineral Sciences Chairman’s Discretionary FundUNSPECIFIED
Issue or Number:8
Record Number:CaltechAUTHORS:20131118-094056163
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Official Citation:MacPherson, G. J., Andronicos, C. L., Bindi, L., Distler, V. V., Eddy, M. P., Eiler, J. M., Guan, Y., Hollister, L. S., Kostin, A., Kryachko, V., Steinhardt, W. M., Yudovskaya, M. and Steinhardt, P. J. (2013), Khatyrka, a new CV3 find from the Koryak Mountains, Eastern Russia. Meteoritics & Planetary Science, 48: 1499–1514. doi: 10.1111/maps.12170
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:42518
Deposited By: Ruth Sustaita
Deposited On:18 Nov 2013 18:06
Last Modified:26 Nov 2019 23:17

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