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Northwest Africa 4529
Basic information Name: Northwest Africa 4529
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 4529
Observed fall: No
Year found: 2006
Country: Algeria
Mass:help 60 g
Classification
  history:
Meteoritical Bulletin:  MB 94  (2008)  Lodranite
Recommended:  Lodranite    [explanation]

This is 1 of 80 approved meteorites classified as Lodranite.   [show all]
Search for other: Acapulcoite-lodranite family, Lodranites, and Primitive achondrites
Comments: Approved 17 Apr 2008
Writeuphelp
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:
State/Prov/County:Algeria
Date:Sep-06
Mass (g):60
Pieces:1
Class:lodranite
Ferrosilite (mol%):63
Wollastonite (mol%):2
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):20
Type spec location:UWS
Main mass:GHupé
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)
Catalogs:
References: Published in Meteoritical Bulletin, no. 94, MAPS 43, 1551-1588 (2008)
Find references in NASA ADS:
Find references in Google Scholar:
Photos:
CreditPhotos
Photos from the Encyclopedia of Meteorites:
The Hupe Collection      
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Gerald Armstrong   
Geography:

Algeria
Coordinates:Unknown.

Statistics:
     This is 1 of 979 approved meteorites from Algeria (plus 26 unapproved names) (plus 4 impact craters)

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