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Northwest Africa 2738
Basic information Name: Northwest Africa 2738
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 2738
Observed fall: No
Year found: 2002
Country: (Northwest Africa)
Mass:help 370 g
Classification
  history:
Meteoritical Bulletin:  MB 89  (2005)  Howardite
MetBase:  v. 7.1  (2006)  Howardite
Recommended:  Howardite    [explanation]

This is 1 of 436 approved meteorites classified as Howardite.   [show all]
Search for other: Achondrites, HED achondrites, and Howardites
Writeuphelp
Writeup from MB 89:

Northwest Africa 2738

Algeria

Found 2002- 2003

Achondrite (howardite)

One single stone of 370 g mostly covered with fresh fusion crust was found in winter 2002/2003 by an anonymous finder in Western Sahara. Classification and mineralogy (V.Moggi-Cecchi; G.Pratesi): polymict breccia with cumulate eucrite and diogenite fragments, not exceeding 10% of the total surface. Orthopyroxene fragments are commonly found set into a clastic matrix. Other types of fragments include large blocky plagioclase (An89.58Ab9.95Or0.47), augite exsolution lamellae (Fs27.52En28.84Wo43.64) and low-Ca pyroxene (Fs59.84En35.27Wo4.89) clasts; minor phases are sulfides and Fe-Ni metal. Oxygen isotope data (δ17O=+1.754 ‰ δ18O=+3.731‰; Δ17O=-0.186‰ - I.Franchi, R.Greenwood, OU) point to an interpretation as HED even if the Δ17O value is slightly more positive than the mass fractionation line for HEDs, probably due to terrestrial contamination. The degree of shock is low as well as weathering. Specimens: Main mass with anonymous finder; type specimen 30 g plus one polished thin section MSP.

Data from:
  MB89
  Table 7
  Line 362:
Place of purchase:Erfoud
Date:2004
Mass (g):370
Pieces:1
Class:How
Classifier:G. Pratesi and V. Moggi Cecchi, MSP
Type spec mass (g):30
Comments:classifier corrected in MB92
Plots: O isotopes:  
Institutions
   and collections		 MSP: Museo di Scienze Planetarie, Via Galcianese 20/H, 59100 Prato, Italy, Italy; Website (institutional address; updated 22 Oct 2022)
OU: Planetary and Space Sciences Department of Physical Sciences The Open University Walton Hall Milton Keynes MK7 6AA United Kingdom, United Kingdom (institutional address; updated 8 Dec 2011)
Catalogs:
References: Published in Meteoritical Bulletin, no. 89, MAPS 40, A201-A263 (2005)
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
ale bartolommei-giulio M.   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9013 approved meteorites from (Northwest Africa) (plus 1869 unapproved names)

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