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Northwest Africa 13303
Basic information Name: Northwest Africa 13303
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13303
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass:help 45 g
Recommended:  Ureilite    [explanation]

This is 1 of 605 approved meteorites classified as Ureilite.   [show all]
Search for other: Achondrites, Ureilites
Comments: Approved 23 May 2020
Writeup from MB 109:

Northwest Africa 13303 (NWA 13303)

(Northwest Africa)

Purchased: 2019

Classification: Ureilite

History: Dustin Dickens was given a single stone for analysis in village of Ait Youb by a dealer named Zaid from southern Morocco.

Physical characteristics: Exterior with desert weathering; saw cut surface reveals a mosaic of brown and green grains.

Petrography: (C. Agee, UNM) This meteorite consists primarily of olivine and pigeonite grains, many greater than 1 mm in size. Very fine-grained metal occupies silicate grain boundaries. Some elongate domains are plucked by grinding and polishing and are likely to be void casts of a once present carbon phase. Olivine is Cr-bearing. No plagioclase observed.

Geochemistry: (C. Agee, UNM) Olivine Fa21.1±0.1, Fe/Mn=46±2, Cr2O3=0.60±0.02 (wt%), n=6; pigeonite Fs17.7±0.4Wo3.8±0.0, Fe/Mn=29±2, n=6.

Classification: Ureilite

Specimens: 9 g including a probe mount on deposit at UNM, Dustin Dickens holds the main mass.

Data from:
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2019
Mass (g):45
Shock stage:low
Weathering grade:moderate
Fayalite (mol%):21.1±0.1
Ferrosilite (mol%):17.7±0.4
Wollastonite (mol%):3.8±0.0
Classifier:C. Agee, UNM
Type spec mass (g):9
Type spec location:UNM
Main mass:Dustin Dickens
Comments:Field name DD-59; submitted by C. Agee, UNM
   and collections
UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
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     This is 1 of 8509 approved meteorites from (Northwest Africa) (plus 1899 unapproved names)

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