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Northwest Africa 14057
Basic information Name: Northwest Africa 14057
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14057
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 1048 g
Classification
  history:
Meteoritical Bulletin:  MB 110  (2022)  Ureilite
Recommended:  Ureilite    [explanation]

This is 1 of 660 approved meteorites classified as Ureilite.   [show all]
Search for other: Achondrites, Ureilites
Comments: Approved 29 Jun 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 14057 (NWA 14057)

(Northwest Africa)

Purchased: 2021 Mar

Classification: Ureilite

History: Bought by Mohamed Ali Loud from a Saharawi mineral dealer in Mauritania.

Petrography: (K. Metzler, IfP) Coarse-grained ultramafic rock with metamorphic texture (~120° triple junctions), consisting of olivine and pyroxene grains up to ~2 mm. Metal is concentrated along grain boundaries and mostly oxidized by terrestrial weathering.

Geochemistry: Mineral compositions and geochemistry: Mean olivine composition: Fa19.2±0.3 (Fa18.6-19.8); n=12. The mean CaO concentration in olivine is 0.37 wt%. Mean pyroxene composition: Fs16.0±0.3Wo5.3±1.6 (Fs15.5-16.5Wo4.2-8.9); n=12. The mean concentration of Cr2O3 in olivine and pyroxene is 0.53 wt% and 1.07 wt%, respectively.

Classification: Ureilite

Specimens: Largest piece: 332 g

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Mauritania
Date:P 2021 Mar
Mass (g):1048
Pieces:17
Class:Ureilite
Shock stage:U-S1
Weathering grade:High
Fayalite (mol%):19.2±0.3
Ferrosilite (mol%):16.0±0.3
Wollastonite (mol%):5.3±1.6
Classifier:K. Metzler, IfP
Type spec mass (g):20
Type spec location:IfP
Main mass:Mohamed Ali Loud
Comments:Submitted by K. Metzler, IfP
Institutions
   and collections		 IfP: Institut für Planetologie, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany (institutional address; updated 23 Jan 2012)
Catalogs:
References: Published in Gattacceca J., McCubbin F.M., Grossman J., Bouvier A., Chabot N.L., D'Orazio M., Goodrich C., Greshake A., Gross J., Komatsu M., Miao B., and Schrader D. (2022) The Meteoritical Bulletin, No. 110. Meteorit. Planet. Sci. 1-4
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    (Caution, these are of unknown reliability)
Antonello Petriccione   
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)
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Revision
  history:
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