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Northwest Africa 13401 | |||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 13401 This is an OFFICIAL meteorite name. Abbreviation: NWA 13401 Observed fall: No Year found: 2020 Country: (Northwest Africa) Mass: ![]() | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 298 approved meteorites (plus 2 unapproved names) classified as Martian (shergottite). [show all] Search for other: Martian meteorites | ||||||||||||||||||||||||||||
Comments: | Approved 7 Jul 2020 | ||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 109:
Northwest Africa 13401 (NWA 13401) (Northwest Africa) Purchased: January 2020 Classification: Martian meteorite (Shergottite) History: Purchased in January 2020 by Jasper Spencer from a moroccan dealer. Physical characteristics: Two stones with near absent fusion crust. Petrography: (Daniel Sheikh, FSU) Sample is composed of maskelynite (Av. 750±100 µm, up to 2 mm, 40 vol%) and complexly zoned, tabular, and irregularly-shaped grains (some twinned) of subcalcic augite and pigeonite (Av. 400±50 µm, up to 1 mm, 60 vol%). Accessory phases include titanomagnetite, Si-Al-Na-K-rich glass, and pyrrhotite. Sample contains minor carbonate weathering veins. Geochemistry: Subcalcic augite (Fs34.3±6.5Wo30.7±1.7, range Fs22.3-46.5Wo27.5-33.5, FeO/MnO=32±5, n=27), pigeonite (Fs49.2±7.0 Wo13.9±2.2, range Fs36.9-59.8Wo10.6-19.7, FeO/MnO=34±4, n=28), maskelynite (An45.5±4.5Or2.7±1.1, range An40.1-51.7Or1.3-4.6, n=23). Classification: Martian (shergottite) Silicate chemistry, the presence of maskelynite, and FeO/MnO ratios of pyroxenes provide support for classification as shergottite. Specimens: 14 grams at UCLA; main mass with Jasper Spencer. | ||||||||||||||||||||||||||||
Data from: MB109 Table 0 Line 0: |
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Institutions and collections |
UCLA: Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095-1567, United States (institutional address; updated 17 Oct 2011) FSU: Department of Geological Sciences, Florida State University, Tallahassee FL 32306-4100, United States (institutional address; updated 16 Dec 2010) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 109, in preparation (2020)
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Photos: |
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Geography: |
Statistics: This is 1 of 9305 approved meteorites from (Northwest Africa) (plus 1873 unapproved names) |