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Northwest Africa 10703 | |||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 10703 This is an OFFICIAL meteorite name. Abbreviation: NWA 10703 Observed fall: No Year found: 2015 Country: (Northwest Africa) Mass: ![]() | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 288 approved meteorites (plus 2 unapproved names) classified as Martian (shergottite). [show all] Search for other: Martian meteorites | ||||||||||||||||||||||||||||
Comments: | Approved 2 Sep 2016 | ||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 105:
Northwest Africa 10703 (NWA 10703) (Northwest Africa) Purchased: 2015 Sep Classification: Martian meteorite (Shergottite) History: Purchased by Eric Twelker in September 2015 from a dealer at the Denver Show. Physical characteristics: The stone (111 g) exhibits a semi-glossy, green and black, wind-ablated exterior. The interior is notable for the presence of relatively abundant pockets of dark, vesicular glass. Petrography: (A. Irving and S. Kuehner, UWS) Diabasic texture. Composed mainly of zoned clinopyroxene and maskelynite with accessory ilmenite, ulvöspinel, pyrrhotite, chlorapatite, Fe-bearing merrillite and silica polymorph (associated with maskelynite), plus pockets of shock glass (light brown in thin section with a swirled appearance). Geochemistry: Pigeonite (Fs43.9-44.2Wo15.3-14.3; Fs65.8Wo13.8; FeO/MnO = 30-35; N = 3), subcalcic augite (Fs20.7-21.1Wo35.3-33.9, FeO/MnO = 24-25; Fs55.5Wo23.3, FeO/MnO = 34 ; N = 3), maskelynite (An44.5-54.4Or5.4-1.3, N = 3). Classification: Martian (shergottite, diabasic). Paired with NWA 8656 and NWA 8657. Specimens: 22.2 g including one polished thin section at UWB; remainder with Twelker. | ||||||||||||||||||||||||||||
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) UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012) Twelker: Eric Twelker, P.O. Box 844, Port Townsend, WA 98368, United States; Website (private address; updated 1 Dec 2014) |
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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 8904 approved meteorites from (Northwest Africa) (plus 1871 unapproved names) |