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Northwest Africa 4529 | |||||||||||||||||||||||
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Basic information | Name: Northwest Africa 4529 This is an OFFICIAL meteorite name. Abbreviation: NWA 4529 Observed fall: No Year found: 2006 Country: Algeria Mass: ![]() | ||||||||||||||||||||||
Classification history: |
This is 1 of 91 approved meteorites classified as Lodranite. [show all] Search for other: Acapulcoite-lodranite family, Lodranites, and Primitive achondrites | ||||||||||||||||||||||
Comments: | Approved 17 Apr 2008 | ||||||||||||||||||||||
Writeup![]() |
Writeup from MB 94:
Northwest Africa 4529 Algeria Find: September 2006 Achondrite (lodranite) History: Purchased by Greg Hupé in September 2006 from a Moroccan dealer in Tagounite. Physical characteristics: A single, dense, dark colored stone (60.0 g) lacking fusion crust. Petrography: (A. Irving and S. Kuehner, UWS ) The overall texture is coarse-grained (grain size 0.6–1.6 mm) and relatively equigranular, but plagioclase grains (0.2–0.45 mm) are interstitial to other phases. The specimen is composed predominantly of orthopyroxene (with minor clinopyroxene exsolution lamellae) and olivine, with lesser amounts of sodic plagioclase (6.5 vol % ), chromite, clinopyroxene (with minor orthopyroxene exsolution lamellae), Na-Mg-merrillite (grain size up to 0.5 mm), kamacite (some as relatively large grains up to 1.1 mm) and troilite. Geochemistry: Orthopyroxene (Fs12.6Wo2.5, FeO/MnO = 14.7–15.9), olivine (Fa14.3, FeO/MnO = 24.7–27.1), plagioclase (An17.8–20.1Or4.8–3.7), chromite (Cr/(Cr + Al) = 0.853, Mg/(Mg + Fe) = 0.337–0.342, mean TiO2 = 0.77 wt % ) Oxygen Isotopes (D. Rumble, CIW ): δ18O (‰) = 3.168, 3.189, 3.467, 2.894; δ17O = 0.829, 0.757, 0.939, 0.613; Δ17 O = - 0.837, - 0.920, - 0.884, - 0.909. Classification: Achondrite (lodranite). Specimens: A total of 12.0 g and one polished thin section are on deposit at UWS . GHupé holds the main mass. | ||||||||||||||||||||||
Data from: MB94 Table 2 Line 33: |
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Plots: | O isotopes: | ||||||||||||||||||||||
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) CIW: Carnegie Insitution Washington, Geophysical Laboratory, 5251 Broad Branch Rd., NW, Washington DC 20015, United States (institutional address) GHupé: Gregory M. Hupé, 9003 Placid Lakes Blvd., Lake Placid, FL 33852, United States; Website (private address) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 94, MAPS 43, 1551-1588 (2008)
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Photos: |
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Geography:![]() |
Statistics: This is 1 of 1277 approved meteorites from Algeria (plus 29 unapproved names) (plus 4 impact craters) |