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Northwest Africa 12425 | |||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 12425 This is an OFFICIAL meteorite name. Abbreviation: NWA 12425 Observed fall: No Year found: 2018 Country: Algeria Mass: 1605 g | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 138 approved meteorites classified as Eucrite-unbr. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||||||
Comments: | Approved 27 Mar 2019 | ||||||||||||||||||||||||||||
Writeup |
Writeup from MB 108:
Northwest Africa 12425 (NWA 12425) Algeria Find: 2014 Jul Classification: HED achondrite (Eucrite, unbrecciated) History: Found by a shepherd in July 2014 near Oum el Assel, Algeria, and subsequently acquired by David Lehman in September 2018 from an Algerian dealer. Petrography: (A. Irving and S. Kuehner, UWS) Fresh unbrecciated specimen with microgabbroic texture composed of predominantly exsolved pigeonite and maskelynite with accessory silica polymorph, ilmenite, chromite, merrillite, troilite and Ni-free metal. Small patches and thin cross-cutting veinlets of dark shock glass are present. Most exsolved pigeonite consists of orthopyroxene host with clinopyroxene exsolution lamellae, but also present are grains composed of clinopyroxene host with orthopyroxene exsolution lamellae. Geochemistry: Orthopyroxene host (Fs60.7-61.3Wo2.2-1.8, FeO/MnO = 31, N = 2), clinopyroxene exsolution lamellae (Fs26.3-29.8Wo43.8-39.8, FeO/MnO =29-30, N = 2), maskelynite (An89.9-90.0Or0.6-0.5, N = 2). Classification: Eucrite (unbrecciated, microgabbroic, maskelynite-bearing). Specimens: 25.1 g including one polished thin section at PSF; remainder with Mr. D. Lehman. | ||||||||||||||||||||||||||||
Data from: MB108 Table 0 Line 0: |
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Institutions and collections |
PSF: Planetary Studies Foundation,10 Winterwood Lane, Unit B, Galena, Illinois 61036-9283, United States; Website (institutional address; updated 1 Dec 2011) UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 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 1358 approved meteorites from Algeria (plus 30 unapproved names) (plus 4 impact craters) | ||||||||||||||||||||||||||||
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Revision history: |
This lists important revisions made to data for this record.
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