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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
Classification
  history:
Recommended:  L6    [explanation]

This is 1 of 12284 approved meteorites (plus 8 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
Writeuphelp
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:
  MB111
  Table 0
  Line 0:
Place of purchase:online
Date:P 20 Jan 2011
Mass (g):343.4
Pieces:1
Class:L6
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
Institutions
   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)
Catalogs:
References: Published in Meteoritical Bulletin, no. 111, in preparation (2022)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9042 approved meteorites from (Northwest Africa) (plus 1870 unapproved names)

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