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Northwest Africa 11340
Basic information Name: Northwest Africa 11340
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11340
Observed fall: No
Year found: 2017
Country: (Northwest Africa)
Mass:help 180 g
Meteoritical Bulletin:  MB 106  (2018)  L3.15
Recommended:  L3.15    [explanation]

This is 1 of 9 approved meteorites classified as L3.15.   [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 28 Jun 2017
Writeup from MB 106:

Northwest Africa 11340 (NWA 11340)

(Northwest Africa)

Purchased: 2017

Classification: Ordinary chondrite (L3.15)

History: Purchased by Dustin Dickens in Morocco, March 2017.

Physical characteristics: Single stone with weathered exterior. Saw cut shows many densely packed chondrules set in dark-brown matrix.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows numerous porphyritic chondrules, most with mesostasis or glass. Abundant opaque matrix. Apparent mean chondrule diameter 586±318 μm, n=21.

Geochemistry: (C. Agee and B. Ha, UNM) Chondrule olivine Fa17.9±9.7, Cr2O3=0.21±0.22 (wt%), n=29; chondrule low-Ca pyroxene Fs9.7±6.7Wo0.5±0.4, n=7.

Classification: Ordinary chondrite (L3.15), subtype 3.15 based on mean values of Fa and Fs and 1-sigma standard deviation, and on the ferroan olivine mean value of Cr2O3 and 1-sigma standard deviation (Grossman and Brearley, 2005).

Specimens: 20.7 g including a probe mount on deposit at UNM, Dustin Dickens holds the main mass.

  • Grossman J.N. and Brearley A.J. (2005) The onset of metamorphism in ordinary and carbonaceous chondrites. Meteorit. Planet. Sci. 40, 87-122. (link)
Data from:
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2017
Mass (g):180
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):17.9±9.7
Ferrosilite (mol%):9.7±6.7
Wollastonite (mol%):0.5±0.4
Classifier:C. Agee, UNM
Type spec mass (g):20.7
Type spec location:UNM
Main mass:Dustin Dickens
Comments:DD-11; 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 Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.
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     This is 1 of 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names)

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