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Northwest Africa 14380
Basic information Name: Northwest Africa 14380
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14380
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 570 g
Classification
  history:
Recommended:  LL3.15    [explanation]

This is 1 of 14 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 11 Dec 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 14380 (NWA 14380)

(Northwest Africa)

Purchased: 2021 May

Classification: Ordinary chondrite (LL3.15)

History: Purchased by Shun-Chung Yang in May 2021 from a dealer in Tindouf, Algeria.

Petrography: (A. Irving, UWS and P. Carpenter, WUSL) Well-formed, closely-packed, unequilibrated glass-bearing chondrules (apparent diameter 780 ± 420 µm, N = 24) are set in a fine grained matrix containing altered kamacite, taenite, troilite and a secondary iron oxide phase compositionally like Ti-poor magnetite.

Geochemistry: Olivine (Fa23.2±15.2, range Fa1.4-41.0, N = 6; Cr2O3 in ferroan olivine 0.02-0.69 wt.%, mean 0.16±0.18 wt%, N = 30), low-Ca pyroxene (Fs14.9±11.6Wo1.3±1.8, range Fs2.9-30.4Wo0.2-3.9, N = 4), augite (Fs9.0±0.6Wo40.9±3.0, range Fs8.5-9.4Wo38.8-43.0, N = 2). Magnetic susceptibility log χ (× 10-9 m3/kg) = 3.74.

Classification: Ordinary chondrite (LL3.15). Subtype based on the mean and standard deviation for Cr2O3 contents in ferroan olivine (Grossman and Brearley, 2005).

Specimens: 22.3 g including one polished thin section at UWB; remainder with Mr. S.-C. Yang.

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:
  MB110
  Table 0
  Line 0:
Place of purchase:Tindouf
Date:P 2021 May
Mass (g):570
Pieces:3
Class:LL3.15
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):23.2±15.2
Ferrosilite (mol%):14.9±11.6
Wollastonite (mol%):1.3±1.8
Magnetic suscept.:3.74
Classifier:A. Irving, UWS, and P. Carpenter, WUSL
Type spec mass (g):22.3
Type spec location:UWB
Main mass:S.-C. Yang
Comments:Work name SCY-33; 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)
Catalogs:
References: Published in Meteoritical Bulletin, no. 110, in preparation (2021)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8495 approved meteorites from (Northwest Africa) (plus 1899 unapproved names)

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