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Northwest Africa 12536 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 12536 This is an OFFICIAL meteorite name. Abbreviation: NWA 12536 Observed fall: No Year found: 2019 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 5 Apr 2019 | ||||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 108:
Northwest Africa 12536 (NWA 12536) (Northwest Africa) Purchased: 2019 Jan Classification: Martian meteorite (Shergottite) History: Purchased by Ben Hoefnagels in January 2019 from a Moroccan dealer. Petrography: (A. Irving and S. Kuehner, UWS) Porphyritic texture. Phenocrysts of zoned olivine (up to 2 mm, containing tiny inclusions of chromite) are set in a relatively coarse grained groundmass composed mainly of twinned pigeonite and maskelynite together with minor orthopyroxene, Mg-bearing merrillite, ilmenite, chromite and pyrrhotite. Small pockets and cross-cutting veinlets of dark brown, glassy shock melt are present. Geochemistry: Olivine (cores Fa22.9-23.3, rim Fa50.2, FeO/MnO = 49-53, N = 3), orthopyroxene (Fs19.0Wo2.4, FeO/MnO = 29), pigeonite (Fs25.5-36.1Wo6.8-10.2, FeO/MnO = 26-33, N = 4), maskleynite (An57.2-66.7Or0.7-0.4, N = 2). Classification: Shergottite (olivine-phyric). Specimens: 12.9 g including one polished thin section at UWB; remainder with Mr. B. Hoefnagels. | ||||||||||||||||||||||||||||||
Data from: MB108 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) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150
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Geography: |
Statistics: This is 1 of 8904 approved meteorites from (Northwest Africa) (plus 1871 unapproved names) |