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Northwest Africa 14286
Basic information Name: Northwest Africa 14286
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14286
Observed fall: No
Year found: 2021
Country: Algeria
Mass:help 750 g
Classification
  history:
Meteoritical Bulletin:  MB 110  (2022)  CO3
Recommended:  CO3    [explanation]

This is 1 of 645 approved meteorites (plus 1 unapproved name) classified as CO3.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CM-CO clan chondrites, and CO chondrites
Comments: Approved 31 Oct 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 14286 (NWA 14286)

Algeria

Purchased: 2021

Classification: Carbonaceous chondrite (CO3)

History: Purchased in 2021, reportedly found in Algeria.

Physical characteristics: Four identically appearing stones found together. Exterior covered in dark colored fusion crust. Broken surface reveals many small dark brown chondrules set in a light brown groundmass.

Petrography: (C. Agee, UNM) Reflected light microscopy shows numerous small chondrules, most in the 50-300 micron apparent diameter range, many of which are porphyritic. All observed chondrules were less than 500 microns in diameter. Opaques minerals are metal and troilite. Sparse fine-grained CAIs are present.

Geochemistry: (C. Agee, UNM) Olivine Fa27.6±12.3, Fe/Mn=118±37, Cr2O3=0.09±0.09 wt%, n=32; low-Ca pyroxene Fs2.7±1.1Wo0.9±0.2, n =7; diopside Fs2.1±1.2Wo39.9±1.6, n=3. Oxygen isotopes (K. Ziegler, UNM): 2 acid-washed fragments analyzed by laser fluorination gave δ18O= -1.851, -2.602; δ17O= -5.781, -6.48; Δ17O= -4.804, -5.106 (linearized, all per mil, TFL slope=0.528).

Classification: Carbonaceous chondrite CO3 based on oxygen isotopes and chondrule size.

Specimens: 22.75 g on deposit at UNM, Simon de Boer holds the main mass.

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:(Northwest Africa)
Date:P 2021
Mass (g):750
Pieces:4
Class:CO3
Shock stage:low
Weathering grade:low
Fayalite (mol%):27.6±12.3
Ferrosilite (mol%):2.7±1.1; 2.1±1.2
Wollastonite (mol%):0.9±0.2; 39.9±1.6
Classifier:C. Agee, UNM
Type spec mass (g):22.75
Type spec location:UNM
Main mass:Simon de Boer
Comments:Fieldname SB3; submitted by C. Agee
Plots: O isotopes:  
Institutions
   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)
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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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Ryan Upchurch   
Geography:

Algeria
Coordinates:Unknown.

Statistics:
     This is 1 of 1356 approved meteorites from Algeria (plus 30 unapproved names) (plus 4 impact craters)
Also see:
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Revision
  history:
  This lists important revisions made to data for this record.

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