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Northwest Africa 3137 | |||||||||||||||||
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Basic information | Name: Northwest Africa 3137 This is an OFFICIAL meteorite name. Abbreviation: NWA 3137 Observed fall: No Year found: 2004 Country: Morocco Mass: ![]() | ||||||||||||||||
Classification history: |
This is 1 of 569 approved meteorites (plus 1 unapproved name) classified as Eucrite. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||
Writeup![]() |
Writeup from MB online:
Northwest Africa 3137 Morocco Purchased 2004 February Achondrite (eucrite) A large, broken, very fresh stone (931 g; 145 mm x 90 mm x 43 mm) about half coated with thin black fusion crust was purchased from a Moroccan dealer at the Tucson Gem and Mineral Show by P. Mani (Mani) in 2004 February. Classification and mineralogy (A. Irving and S. Kuehner, UWS): Metamorphic texture. Aggregate of exsolved low-Ca pyroxene, some exsolved augite and calcic plagioclase (An89.1-90.7Or0.1-0.2) with accessory silica polymorph (enclosing troilite, augite and rare merrillite), chromite, ilmenite and troilite (with rare included baddeleyite). Most pyroxene grains consist of fine lamellae of augite (Fs26.4-28.7Wo43.5-44.4, FeO/MnO = 30.7 - 33.7) within orthopyroxene (Fs61.6-2.0Wo1.4-1.7, FeO/MnO = 30.8 - 32.2), and originally were pigeonite. Although the pyroxene and plagioclase compositions in this specimen are almost identical to those in NWA 3138, the textures are quite different, and these two stones are not paired. Specimens: type specimens, 20.6 g, and two polished thin sections, UWS; main mass, Philip Mani, 901 Sonterra Blvd., Suite 316, San Antonio, TX 78258. | ||||||||||||||||
Data from: MB89 Table 7 Line 475: |
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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) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 89, MAPS 40, A201-A263 (2005)
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Geography:![]() |
Statistics: This is 1 of 1932 approved meteorites from Morocco (plus 27 unapproved names) (plus 1 impact crater) |