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Northwest Africa 4484 | |||||||||||||
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Basic information | Name: Northwest Africa 4484 This is an OFFICIAL meteorite name. Abbreviation: NWA 4484 Observed fall: No Year found: 2006 Country: Algeria Mass: ![]() | ||||||||||||
Classification history: |
This is 1 of 589 approved meteorites (plus 1 unapproved name) classified as Eucrite. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||
Comments: | Approved 24 Jul 2007 | ||||||||||||
Writeup![]() |
Writeup from MB 92:
Northwest Africa 4484 Algeria Find: June 2006 Achondrite (eucrite, basaltic) History: S. Ralew purchased the specimens in June 2006 in Rissani, Morocco. Physical characteristics:The meteorite consists of seven broken fragments of a dark grey stone with a combined weight of 140 g. Petrography: (A. Irving and S. Kuehner, UWS) The thin section studied shows an ophitic texture, with large (≤ 1.3 mm) pyroxene grains (composed of orthopyroxene with fine augite exsolution lamellae or patchy intergrowths of orthopyroxene with augite) and distinctive, thin plagioclase laths (commonly in radiating clusters).Interstitial mesostasis regions contain silica, ilmenite, troilite and minor Ni-free kamacite (partly altered to brown iron hydroxides). Mineral compositions and geochemistry:Augite (Fs32.4-32.8Wo41.2-41.3; FeO/MnO = 32.7-36.7), orthopyroxene (Fs64.9Wo2.9; FeO/MnO = 32.2) and plagioclase (An86.0-90.5Or0.2-0.5). Classification: Achondrite (eucrite, basaltic). Type specimens: A total of 20 g of sample and one polished thin section are on deposit at UWS. Ralew holds the main mass. | ||||||||||||
Data from: MB92 Table 2 Line 80: |
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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) Ralew: Stefan Ralew, Kunibertstraße 29, 12524 Berlin, Germany; Website (private address) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 92, MAPS 42, 1647-1694 (2007)
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Geography:![]() |
Statistics: This is 1 of 1306 approved meteorites from Algeria (plus 30 unapproved names) (plus 4 impact craters) |