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Northwest Africa 8289
Basic information Name: Northwest Africa 8289
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8289
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass:help 333 g
Meteoritical Bulletin:  MB 103  (2014)  CV3
Recommended:  CV3    [explanation]

This is 1 of 624 approved meteorites (plus 1 unapproved name) classified as CV3.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CV chondrites, and CV-CK clan chondrites
Comments: Approved 14 Mar 2014
Writeup from MB 103:

Northwest Africa 8289 (NWA 8289)

(Northwest Africa)

Purchased: 2013

Classification: Carbonaceous chondrite (CV3)

History: Purchased by Brahim Tahiri from a Moroccan meteorite hunter and sent to his partner Sean Tutorow for classification, 2013.

Physical characteristics: Single stone, dark, weathered, irregular exterior, some orange oxidation patches, CAIs visible, dark gray matrix, friable.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount many irregular shaped porphryritic chondrules, most chondrules with abundant opaque inclusions, fine-grained matrix makes up about ~50% of this meteorite, ferroan olivines and pyroxenes are rare.

Geochemistry: (C. Agee and H. Miley, UNM) Olivine Fa0.9±0.6, range Fa0.4-2.0, Cr2O3=0.24±0.10 (wt%), CaO=0.33±0.12 (wt%), n=9; enstatite Fs1.6±0.9Wo0.9±0.1, n=7; plagioclase An81.2±4.1Ab18.6±4.1Or0.2±0.1, n=7; aluminous augite Fs35.5Wo28.3, Al2O3=18.1 (wt%); spinel Mg#=93; gehlenite-rich melilite observed in CAIs. Oxygen isotopes (K. Ziegler, UNM) Oxygen isotope values of 3 acid-washed aliquots of bulk sample, 1.4, 1.1, 2.0 mg, gave δ17O = -8.484, -4.744, -5.974, δ18O = -3.877, -0.884, -2.277, Δ17O = -6.437, -4.277, -4.772 (linearized, all permil).

Classification: Carbonaceous chondrite (CV3)

Specimens: 20.11 g including a probe mount on deposit at UNM, Sean Tutorow holds the main mass.

Data from:
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2013
Mass (g):333.37
Fayalite (mol%):0.9±0.6
Ferrosilite (mol%):1.6±0.9
Wollastonite (mol%):0.9±0.1
Classifier:C. Agee, UNM
Type spec mass (g):20.11
Type spec location:UNM
Main mass:Sean Tutorow
Comments:Field name G474; submitted by C. Agee, UNM
Plots: O isotopes:  
   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. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full
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Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Michael S. Scherman   

     This is 1 of 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names)

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