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Northwest Africa 13367
Basic information Name: Northwest Africa 13367
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13367
Observed fall: No
Year found: 2020
Country: Algeria
Mass:help 249 g
Classification
  history:
Recommended:  Martian (shergottite)    [explanation]

This is 1 of 238 approved meteorites (plus 1 unapproved name) classified as Martian (shergottite).   [show all]
Search for other: Martian meteorites
Comments: Approved 2 Aug 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 13367 (NWA 13367)

Algeria

Purchased: 2020

Classification: Martian meteorite (Shergottite)

History: Purchased from a Moroccan dealer in April 2020.

Physical characteristics: Single stone, fusion crust, saw cuts reveals an ultramafic cumulate rock with ophitic to poikilitic textures with mm-size pale yellow and dark gray grains.

Petrography: (C. Agee, UNM) Microprobe examination shows approximately 50% olivine, 40% pyroxene, and 10-5% maskelynite. Two distinct pyroxene trends are present 1) Mg-rich low calcium pyroxene trending to slightly more Fe-rich pigeonite, 2) Mg-rich augite trending to more Ca-rich augite. Ilmenite, spinel, Fe-sulfide, and merrillite are minor ubiquitous phases.

Geochemistry: (C. Agee, UNM) Olivine Fa34.6±2.0, Fe/Mn=49±2, n=10; low Ca-pyroxene Fs22.5±0.5Wo4.7±0.7, Fe/Mn=29±2, n=6; augite Fs17.2±0.9Wo32.4±2.8, Fe/Mn=24±1, n=4; maskelynite An52.9±2.3Ab46.0±2.2Or1.1±0.2, n=4, fusion crust SiO2=46.5±0.6, TiO2=0.9±0.1, Al2O3=8.6±3.5, Cr2O3=0.7±0.1, MgO=18.0±3.5, FeO=15.3±0.5, MnO=0.4±0.1, Na2O=1.4±0.5 (all wt%), n=2.

Classification: Martian peridotitic shergottite. Macroscopic textural appearance similar to NWA 1950 and ALHA77005. Paired with NWA 13250.

Specimens: 20 g on deposit at UNM, Marcin Cimala holds the main mass.

Data from:
  MB109
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2020
Mass (g):249
Pieces:1
Class:Martian (shergottite)
Shock stage:high
Weathering grade:low
Fayalite (mol%):34.6±2.0
Ferrosilite (mol%):22.5±0.5, 17.2±0.9
Wollastonite (mol%):4.7±0.7, 32.4±2.8
Classifier:C. Agee, UNM
Type spec mass (g):20
Type spec location:UNM
Main mass:Marcin Cimala
Comments:Field name MC-178; submitted by C. Agee, UNM
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 Meteoritical Bulletin, no. 109, in preparation (2020)
Find references in NASA ADS:
Find references in Google Scholar:
Geography:

Algeria
Coordinates:Unknown.

Statistics:
     This is 1 of 1034 approved meteorites from Algeria (plus 26 unapproved names) (plus 4 impact craters)

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