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Northwest Africa 14911
Basic information Name: Northwest Africa 14911
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14911
Observed fall: No
Year found: 2011
Country: (Northwest Africa)
Mass:help 343 g
Meteoritical Bulletin:  MB 111  (2023)  L6
Recommended:  L6    [explanation]

This is 1 of 12995 approved meteorites (plus 11 unapproved names) classified as L6.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 9 May 2022
Writeup from MB 111:

Northwest Africa 14911 (NWA 14911)

(Northwest Africa)

Purchased: 20 Jan 2011

Classification: Ordinary chondrite (L6)

Physical characteristics: Physical Characteristics: CML received a thick (1 cm) slice with acrylic on both cut faces. Cut surfaces are dark brown, with slightly lighter colored clasts separated by dark veins.

Petrography: (M. Hutson, A. Ruzicka, Cascadia): There is a well-developed fusion crust (up to 0.5 mm thick) on the two longer edges of the sample in thin section. The texture is coarse-grained, with a few barely discernible chondrules. Dark veins cross the section; in reflected light, these contain numerous small blebs of troilite and weathering product. Small grains of maskelynite were observed. In BSE imaging, the dark veins contain silicate melt with a few zoned grains and numerous blebs of metal/sulfide/weathering product having a cellular texture.

Geochemistry: Fa24.5±0.6, N=12; Low-Ca pyroxene: Fs20.8±0.2Wo1.2±0.2, N=8.

Classification: Ordinary chondrite (L6) based on mineral chemistry and texture.

Specimens: Cascadia holds 24.7 g in one piece, as well as a polished thin section and material in an epoxy butt; Greg Carr holds the main mass.

Data from:
  Table 0
  Line 0:
Place of purchase:online
Date:P 20 Jan 2011
Mass (g):343.4
Shock stage:S4
Weathering grade:W2
Fayalite (mol%):24.5±0.6 (N=12)
Ferrosilite (mol%):20.8±0.2 (N=8)
Wollastonite (mol%):1.2±0.2 (N=8)
Classifier:M. Hutson, L. McHenry, D. Sheikh, and A. Ruzicka, Cascadia
Type spec mass (g):25.9
Type spec location:Cascadia
Main mass:Greg Carr
Comments:Lab number CML 0629, Greg Carr collection number M0139; submitted by Melinda Hutson
   and collections
Cascadia: Cascadia Meteorite Laboratory, Portland State University, Department of Geology, Room 17 Cramer Hall, 1721 SW Broadway, Portland, OR 97201, United States; Website (institutional address; updated 28 Oct 2011)
References: Published in Gattacceca J., McCubbin F. M., Grossman J. N., Schrader D. L., Chabot N. L., D’Orazio M., Goodrich C., Greshake A., Gross J., Joy K. H., Komatsu M. and Miao B. (2023) The Meteoritical Bulletin, No. 111. Meteoritics & Planetary Science 58, 901–904. ?
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     This is 1 of 9829 approved meteorites from (Northwest Africa) (plus 1851 unapproved names)

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