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Northwest Africa 2644
Basic information Name: Northwest Africa 2644
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 2644
Observed fall: No
Year found: 2004
Country: (Northwest Africa)
Mass:help 216 g
Classification
  history:
Meteoritical Bulletin:  MB 89  (2005)  Howardite
MetBase:  v. 7.1  (2006)  Howardite
Recommended:  Howardite    [explanation]

This is 1 of 398 approved meteorites classified as Howardite.   [show all]
Search for other: Achondrites, HED achondrites, and Howardites
Writeuphelp
Writeup from MB 89:

Northwest Africa 2644

Northwest Africa

Purchased 2004

Achondrite (howardite)

A 216 g dark, crusted stone was purchased in Erfoud, Morocco in August 2004. Description and classification (T. Bunch and J. Wittke, NAU): composed of typical cumulate and basaltic eucrite clasts and large (up to 2.8 mm diameter), very dark shock-melt and breccia clasts of glass, quench crystals, and shocked diogenite and eucrite fragments, all set in a very light-colored and fine-grained matrix. In addition, irregular to sub-rounded metal grains up to 3 mm in diameter are present within the shocked clasts and randomly distributed in the matrix. Diogenite orthopyroxene, Fs21.3-29Wo0.8-3.1 (FeO/MnO = 24.5-32.4); shocked clast pigeonite, Fs29.1-31.8Wo3.4-6.1 (FeO/MnO = 30.2=33.4); cumulate pyroxene, Fs51.4-56.4Wo2.9-3.8; large plagioclase fragments, An90-94.2; metal, Ni = 4.4–18.3 wt. %.  Low-grade weathering and low level shock; shock-melt/breccia clasts experienced high shock levels. Specimens: 22.0 g type sample, NAU; main mass, Oakes.

Data from:
  MB89
  Table 7
  Line 351:
Place of purchase:Erfoud
Date:2004
Mass (g):216
Pieces:1
Class:How
Classifier:Ted Bunch, NAU
Type spec mass (g):22
Type spec location:NAU
Institutions
   and collections
NAU: Geology, Bldg 12 Knoles Dr Northern Arizona University, Flagstaff, AZ 86011, United States; Website (institutional address; updated 12 Apr 2012)
Oakes: Nelson Oakes, Route 1, House 50C, Uniondale, PA 18470, United States; Website (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 89, MAPS 40, A201-A263 (2005)
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7820 approved meteorites from (Northwest Africa) (plus 1971 unapproved names)

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