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Northwest Africa 5774 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 5774 This is an OFFICIAL meteorite name. Abbreviation: NWA 5774 Observed fall: No Year found: 2005 Country: (Northwest Africa) Mass: ![]() | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 400 approved meteorites classified as Eucrite-pmict. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||||||||
Comments: | Approved 10 Dec 2013 | ||||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 102:
Northwest Africa 5774 (NWA 5774) (Northwest Africa) Purchased: 2005 Jun Classification: HED achondrite (Eucrite, polymict) History: Purchased by F. Kuntz in June 2005 from a dealer in Morocco. Petrography: (A. Irving and S. Kuehner) Fresh fragmental breccia composed mainly of gabbroic eucrite clasts and related crystalline debris, plus ~5 vol.% orthopyroxene grains derived from diogenites. The eucrite material consists of exsolved pigeonite, calcic plagioclase,silica polymorph, subcalcic ferroaugite, fayalite, ferrosilite, symplectititc intergrowths of fayalite+hedenbergite+silcia, ilmenite, Ti-poor chromite, Ti-rich chromite and troilite. Geochemistry: Olivine (Fa77.1, FeO/MnO = 44.6), diogenitic orthopyroxene (Fs26.1Wo3.9, FeO/MnO = 31), pigeonite (Fs36.6Wo6.0; Fs53.3Wo10.1; FeO/Mn) = 29-30), subcalcic ferroaugite (Fs64.4Wo28.7, FeO/MnO = 37), low-Ca pyroxene host (Fs54.8Wo8.4, FeO/MnO = 31), clinopyroxene exsolution lamella (Fs31.0Wo39.0, FeO/MnO = 31). Classification: Eucrite (polymict). Specimens: Type specimen plus one polished thin section at PSF; main mass with Kuntz. | ||||||||||||||||||||||||||||||
Data from: MB102 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) Kuntz: Fabien Kuntz, France; Website (private address) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015
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Geography: |
Statistics: This is 1 of 9370 approved meteorites from (Northwest Africa) (plus 1875 unapproved names) |