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Northwest Africa 13240
Basic information Name: Northwest Africa 13240
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13240
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass:help 4 kg
Recommended:  CV3    [explanation]

This is 1 of 567 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 28 Mar 2020
Writeup from MB 109:

Northwest Africa 13240 (NWA 13240)

(Northwest Africa)

Purchased: 2019 Dec

Classification: Carbonaceous chondrite (CV3)

History: Purchased in Laayoune, Morocco, by Rachid and Jaouad Chaoui in December 2019.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Well-formed chondrules (apparent diameter 1000±530 µm, N = 22) and irregularly shaped CAI (mostly very fine grained but some coarser grained) are set in a fine grained matrix (~40 vol.%, deep sepia brown in thin section).

Geochemistry: Olivine (Fa14.6±15.7, range Fa0.7-47.8, N = 7), low-Ca pyroxene (Fs0.9±0.8Wo2.2±1.5, range Fs0.3-1.4Wo1.1-3.2, N = 2), augite (Fs1.0±0.4Wo38.5±1.0, range Fs0.7-1.2Wo37.8-39.2, N = 2), plagioclase (An82.3Or0.1), ferroan olivine in matrix (cores Fa56.5-66.7, N = 2; rims Fa76.6-93.3, N = 2).

Classification: Carbonaceous chondrite (CV3).

Specimens: 30.2 g including one polished thin section at UWB; remainder with Mr. R. Chaoui and Mr. J. Chaoui.

Data from:
  Table 0
  Line 0:
Place of purchase:Laayoune
Date:P 2019 Dec
Mass (g):4000
Shock stage:S2
Weathering grade:low
Fayalite (mol%):14.6±15.7
Ferrosilite (mol%):0.9±0.8
Wollastonite (mol%):2.2±1.5
Classifier:A. Irving, UWS, and P. Carpenter, WUSTL
Type spec mass (g):30.2
Type spec location:UWB
Main mass:R. Chaoui and J. Chaoui
Comments:Work name RC126.2; submitted by A. Irving
   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)
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
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     This is 1 of 7937 approved meteorites from (Northwest Africa) (plus 1960 unapproved names)

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