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Northwest Africa 13884 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 13884 This is an OFFICIAL meteorite name. Abbreviation: NWA 13884 Observed fall: No Year found: 2020 Country: (Northwest Africa) Mass: ![]() | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 281 approved meteorites (plus 2 unapproved names) classified as Martian (shergottite). [show all] Search for other: Martian meteorites | ||||||||||||||||||||||||||||||
Comments: | Approved 6 May 2021 | ||||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 110:
Northwest Africa 13884 (NWA 13884) (Northwest Africa) Purchased: 2020 Classification: Martian meteorite (Shergottite) History: Purchased in 2020 by Daniel Sheikh from a meteorite dealer in Morocco. Physical characteristics: Single stone with minor fusion crust. Petrography: (D. Sheikh, FSU) Specimen displays a porphyritic texture containing euhedral to subhedral olivine megacrysts (Av. 1.5 mm, up to 2.5 mm) set within a finer-grained groundmass containing pigeonite, augite, plagioclase, maskelynite, pyrrhotite, Cr-ulvöspinel, merrillite, ilmenite, and Si-Al-rich glass. Most plagioclase grains/laths show transformation into maskelynite occurring primarily in the cores, while the rims remain largely unaffected. Geochemistry: Olivine (Fa45.8±3.2, range Fa37.7-49.7, FeO/MnO=51±7, n=47), Pigeonite (Fs34.7±2.3Wo11.8±1.8, range Fs29.5-37.7Wo9.2-15.3, FeO/MnO=31±4, n=20), Augite (Fs21.6±1.8Wo33.5±2.5, range Fs19.3-23.4Wo31.1-37.2, FeO/MnO=27±4, n=6), Plagioclase (An59.3±7.6, range An39.6-67.6, n=22). Classification: Martian (olivine-phyric shergottite) based on the texture, overall mineral content and compositions. Specimens: 1.03 gram at App; main mass with D. Sheikh. | ||||||||||||||||||||||||||||||
Data from: MB110 Table 0 Line 0: |
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Institutions and collections |
App: Department of Geology, 572 Rivers St., Appalachian State University, Boone, NC 28608, United States (institutional address; updated 7 Mar 2013) 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. 110, in preparation (2021)
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Geography: |
Statistics: This is 1 of 8559 approved meteorites from (Northwest Africa) (plus 1896 unapproved names) |