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Northwest Africa 2913
Basic information Name: Northwest Africa 2913
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 2913
Observed fall: No
Year found: 2005
Country: Morocco
Mass:help 100 g
Classification
  history:
Meteoritical Bulletin:  MB 90  (2006)  Eucrite-mmict
Recommended:  Eucrite    [explanation]

This is 1 of 459 approved meteorites (plus 1 unapproved name) classified as Eucrite.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 3 Feb 2006
Writeuphelp
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:
Place of purchase:Unknown
Date:2005
Mass (g):100
Pieces:3
Class:Euc
Weathering grade:minimal
Type spec mass (g):23.1
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)
Catalogs:
References: Published in Meteoritical Bulletin, no. 90, MAPS 41, 1383-1418 (2006)
Find references in NASA ADS:
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Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1460 approved meteorites from Morocco (plus 21 unapproved names) (plus 1 impact crater)

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