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Northwest Africa 2913 | |||||||||||||||
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Basic information | Name: Northwest Africa 2913 This is an OFFICIAL meteorite name. Abbreviation: NWA 2913 Observed fall: No Year found: 2005 Country: Morocco Mass: 100 g | ||||||||||||||
Classification history: |
This is 1 of 598 approved meteorites (plus 1 unapproved name) classified as Eucrite. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||
Comments: | Approved 3 Feb 2006 | ||||||||||||||
Writeup |
Writeup from MB 90:
Northwest Africa 2913 Morocco Find: 2005 Achondrite (eucrite, monomict melt breccia) History: A 100.2 g complete stone was purchased in Erfoud, Morocco, in May 2005. Petrography: (J. Wittke and T. Bunch, NAU) Specimen contains medium-grained (<2 mm), centimeter-size, cumulate basalt clasts set in a microbreccia melt matrix. Clasts are moderately shocked with partial maskelynization of plagioclase and mechanical twinning, optical mosaicism and reduced birefringence in pyroxenes. The dark matrix is a flow mixture of FeO-rich glasses, very small cumulate basalt fragments, and patches of quench-textured microbasalt. Geochemistry: Monomict cumulate basalt: host Ca-poor pyroxene (Fs55.4–57.8Wo5.1–2.9), FeO/MnO = 28; exsolved augite (Fs24.2Wo44.7), FeO/MnO = 36; plagioclase/ maskelynite (An90.8); chromite Cr/(Cr+Al) = 0.86. Classification: Achondrite (eucrite, monomict melt breccia); moderate shock, minimal weathering. Specimens: A 21 g type specimen is deposited at NAU. Birdsell holds the main mass. | ||||||||||||||
Data from: MB90 Table 2 Line 166: |
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Institutions and collections |
NAU: Geology, Bldg 12
Knoles Dr
Northern Arizona University, Flagstaff, AZ 86011, United States; Website (institutional address; updated 12 Apr 2012) Birdsell: Arizona Skies Meteorites, P.O. Box 2412, Flagstaff, AZ 86003, United States; Website (private address) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 90, MAPS 41, 1383-1418 (2006)
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Geography: |
Statistics: This is 1 of 2082 approved meteorites from Morocco (plus 31 unapproved names) (plus 1 impact crater) | ||||||||||||||
Also see: |
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Revision history: |
This lists important revisions made to data for this record.
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