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Northwest Africa 10618 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 10618 This is an OFFICIAL meteorite name. Abbreviation: NWA 10618 Observed fall: No Year found: 2015 Country: (Northwest Africa) Mass: 93.8 g | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 321 approved meteorites (plus 2 unapproved names) classified as Martian (shergottite). [show all] Search for other: Martian meteorites | ||||||||||||||||||||||||||||||
Comments: | Approved 30 Apr 2016 | ||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 105:
Northwest Africa 10618 (NWA 10618) (Northwest Africa) Purchased: 2015 Oct Classification: Martian meteorite (Shergottite) History: Purchased in Erfoud, Morocco by Aziz Habibi in October 2015. Physical characteristics: The specimen (93.8 g) has an overall dark-gray interior with irregularly distributed, larger orangeish grains (oikocrysts). Petrography: (A. Irving and S. Kuehner, UWS) Large, twinned prismatic grains (up to 1.1 cm long) of low-Ca pyroxene (pale orange in thin section) enclose small olivine chadacrysts. The dominant portion is a microgabbroic aggregate of olivine, pigeonite, subcalcic augite and maskelynite, with accessory Ti-rich chromite, Cr-bearing ilmenite, merrillite, chlorapatite, pyrrhotite and minor baddeleyite. All olivine is variably tan to deep brown in thin section (indicative of high shock). Geochemistry: (S. Kuehner, UWS; P. Carpenter, WUSL) Olivine chadacrysts (Fa39.9-40.1, FeO/MnO = 47, N = 3), low-Ca pyroxene oikocryst (core Fs25.8Wo5.3; rim Fs30.0Wo8.8, FeO/MnO = 28-29, N = 2), pigeonite (Fs29.2-30.1Wo10.3-11.3, FeO/MnO = 27-29, N = 4), sucalcic augite (Fs19.2-20.5Wo31.1-31.8, FeO/MnO = 23-24, N = 3), maskelynite (An52.7-54.6Or2.4-2.3, N = 2). Classification: Martian (shergottite, poikilitic). Specimens: 21.4 g including one polished thin section and one polished mount at UWB; remainder with Mr. A. Habibi. | ||||||||||||||||||||||||||||||
Data from: MB105 Table 0 Line 0: |
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Institutions and collections |
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012) WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011) UWB: University of Washington, Burke Museum of Natural History and Culture, Box 353010 Seattle, WA 98195, United States (institutional address; updated 9 Oct 2023) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full
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Geography: |
Statistics: This is 1 of 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names) | ||||||||||||||||||||||||||||||
Also see: |
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Revision history: |
This lists important revisions made to data for this record.
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