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Northwest Africa 5000
Basic information Name: Northwest Africa 5000
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 5000
Observed fall: No
Year found: 2007
Country: Morocco
Mass:help 11.53 kg
Classification
  history:
Meteoritical Bulletin:  MB 93  (2008)  Lunar
Recommended:  Lunar    [explanation]

This is 1 of 44 approved meteorites classified as Lunar.   [show all]
Search for other: Lunar meteorites
Comments: Approved 30 Jan 2008
Revised 4 Aug 2008: final writeup
Writeuphelp
Writeup from MB 93:

Northwest Africa 5000

Morocco

Find: July 2007

Achondrite (lunar, feldspathic breccia)

History: Found in July 2007 in southern Morocco and provided to Adam Hupé in October 2007.

Physical characteristics: A single, large cuboidal stone (11.528 kg) with approximate dimensions 27 cm × 24 cm × 20 cm. One side (which appears to have been embedded downward in light brown mud) has preserved regmaglypts and is partially covered by translucent, pale greenish fusion crust with fine contraction cracks. Abundant large beige to white, coarse-grained clasts up to 8 cm across (some of which have been eroded out on exterior surfaces of the stone, likely by eolian sand blasting) and sparse black, vitreous clasts up to 2 cm across (containing irregular small white inclusions) are set in a dark gray to black, partially glassy breccia matrix. One partially eroded clast exposed on an exterior surface contains both the coarse grained beige lithology and the more resistant black, vitreous lithology in sharp contact.

Petrography: (A. Irving and S. Kuehner, UWS) Almost monomict fragmental breccia dominated by Mg-suite olivine gabbro clasts consisting predominantly of coarse-grained (0.5-2 mm) calcic plagioclase, pigeonite (some with fine exsolution lamellae), and olivine with accessory merrillite, Mg-bearing ilmenite, Ti-bearing chromite, baddeleyite, rare zirconolite, silica polymorph, K-feldspar, kamacite, and troilite. Some gabbro clasts have shock injection veins composed mostly of glass containing myriad fine troilite blebs and engulfed mineral fragments. Black, vitreous impact melt clasts consist of sporadic, small angular fragments (apparently surviving relics) of gabbro and related mineral phases in a very fine grained, non-vesicular, ophitic-textured matrix of pigeonite laths (up to 20 microns long × 2 microns wide) and interstitial plagioclase with tiny spherical grains of kamacite, irregular grains of schreibersite and rare troilite.

Geochemistry: Gabbro clasts: plagioclase (An96.1-98.0Or<0.1), pigeonite (Fs32.0-64.5Wo6.7-13.1; FeO/MnO = 51.1-62.0), olivine in different clasts range from Fa23.9-24.2, Fa40.4 to Fa58.8 (with FeO/MnO = 81-100), chromite [(Cr/(Cr + Al) = 0.737, Mg/(Mg + Fe) = 0.231, TiO2 = 5.9 wt%], ilmenite (4.1 wt% MgO). Bulk composition: (R. Korotev, WUSL) INAA of 6 subsamples gave mean values of 5.3 wt% FeO and 0.4 ppm Th.

Classification: Achondrite (lunar, feldspathic breccia). Specimens: A total of 40.2 g of sample, two polished mounts and one large polished thin section are on deposit at UWS. AHupé hold the main mass.

Submitted by: A. Irving, UWS.

Data from:
  MB93
  Table 2
  Line 173:
Place of purchase:Find in Morocco
Date:October 2007
Mass (g):11.528 kg
Pieces:1
Class:Lunar
Type spec mass (g):40.2
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)
WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011)
AHupé: Adam C. Hupé, 2807 China Cove, Laughlin, NV 89029, United States; Website (private address; updated 29 Jun 2013)
Catalogs:
References: Published in Meteoritical Bulletin, no. 93, MAPS 43, 571-632 (2008)
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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)
ale bartolommei-giulio M.   
Chris Handler   
David L. Ribeca   
Denis gourgues   
Dominik Stoeckli   
Doug R   
Gerald Armstrong   
Gregor H.      
Jim K   
MeteoriteCollector.org - FCOM - Russ Finney                  
Michael S. Scherman      
Rene Schmit      
Robert Zdancewicz   
Troy Carroll      
Wandering Star   
Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 926 approved meteorites from Morocco (plus 8 unapproved names)

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