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Northwest Africa 13324
Basic information Name: Northwest Africa 13324
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13324
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass:help 5 kg
Classification
  history:
Recommended:  LL3.15    [explanation]

This is 1 of 10 approved meteorites classified as LL3.15.   [show all]
Search for other: LL chondrites, LL chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 4 Jul 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 13324 (NWA 13324)

(Northwest Africa)

Purchased: 2020 Jan

Classification: Ordinary chondrite (LL3.15)

History: Purchased by Adam Aaronson in Temara, Morocco in January 2020.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Closely-packed, well-formed, unequilibrated glass-bearing chondrules (apparent diameter 800±330 µm, N = 24) are set in a sparse opaque matrix containing altered kamacite, taenite and troilite.

Geochemistry: Olivine (Fa14.2±9.1, range Fa1.2-38.4, N = 9; Cr2O3 in ferroan olivine 0.06-0.61 wt.%, mean 0.27±0.13 wt.%, N = 31), low-Ca pyroxene (Fs16.4±6.7Wo1.3±1.4, range Fs4.7-25.0Wo0.4-3.9, N = 7), pigeonite (Fs20.2Wo8.0), subcalcic augite (Fs20.2±8.4Wo27.0±2.6, rangeFa10.8-27.0Wo29.9-24.7, N = 3), augite (Fs4.3Wo40.4). Magnetic susceptibility log χ (× 10-9 m3/kg) = 4.01.

Classification: Ordinary chondrite (LL3.15). Subtype based on Cr2O3 contents of ferroan olivines per Figure 15 of Grossman and Brearley (2005).

Specimens: 33.5 g including one polished thin section at UWB; remainder with Aaronson.

Bibliography:
  • 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:
  MB109
  Table 0
  Line 0:
Place of purchase:Temara
Date:P 2020 Jan
Mass (g):5000
Pieces:1
Class:LL3.15
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):14.2±9.1
Ferrosilite (mol%):16.4±6.7
Wollastonite (mol%):1.3±1.4
Magnetic suscept.:4.01
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):33.5
Type spec location:UWB
Main mass:A. Aaronson
Comments:Work name M2246; submitted by A. Irving
Institutions
   and collections
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
Aaronson: Sahara Overland Ltd., Harhora, Temara, 12000, Morocco (private address; updated 3 Jan 2010)
Catalogs:
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7472 approved meteorites from (Northwest Africa) (plus 1988 unapproved names)

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