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Northwest Africa 5996
Basic information Name: Northwest Africa 5996
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 5996
Observed fall: No
Year found: 2009
Country: Morocco
Mass:help 452 g
Classification
  history:
Meteoritical Bulletin:  MB 105  (2016)  Ureilite
Recommended:  Ureilite    [explanation]

This is 1 of 630 approved meteorites classified as Ureilite.   [show all]
Search for other: Achondrites, Ureilites
Comments: Approved 19 Apr 2016
Writeuphelp
Writeup from MB 105:

Northwest Africa 5996 (NWA 5996)

Morocco

Find: 2009

Classification: Ureilite

History: Provided by a dealer for classification in November 2009.

Physical characteristics: One single stone. No crust, significantly weathered. log χ (× 10-9 m3/kg) = 3.51.

Petrography: Aggregate of coarse olivine grains with reduced margins and minor pyroxenes, with recrystallized texture. Dominant olivine (>90%). Millimeter-sized graphite laths. Rare small interstitial pyroxene (mostly low Ca).

Geochemistry: (EMPA) Olivine: core and rim Fa18±3 (N=16), core Fa13±0.4 (N=3) with more magnesian rims and high Cr2O3 (0.6±0.2; N=16), FeO/MnO = 40. Low Ca pyroxene with Fs12±1Wo7±5(N=3)and FeO/MnO = 20.

Classification: Ureilite

Specimens: Both pieces at UPVI

Data from:
  MB105
  Table 0
  Line 0:
Origin or pseudonym:Erfoud
Date:2009
Mass (g):452
Pieces:1
Class:Ureilite
Fayalite (mol%):18±3 (N=16)
Ferrosilite (mol%):12±1 (N=3)
Wollastonite (mol%):7±5 (N=3)
Magnetic suscept.:3.51
Classifier:A. Jambon, UPMC
Type spec mass (g):24.8
Type spec location:UPVI
Main mass:Moroccan Import Asnières
Comments:FM141; submitted by Beverley Tkalcec
Institutions
   and collections		 UPVI: Université Pierre et Marie Curie (Paris VI),Case 110, 4 Place Jussieu, 75005 Paris, France (institutional address; updated 5 Oct 2014)
Catalogs:
References: Published in Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Dominik Stoeckli   
Ziyao Wang   
Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1973 approved meteorites from Morocco (plus 37 unapproved names) (plus 1 impact crater)

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