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Northwest Africa 8121
Basic information Name: Northwest Africa 8121
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8121
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass:help 583 g
Classification
  history:
Meteoritical Bulletin:  MB 103  (2014)  L3
Recommended:  L3    [explanation]

This is 1 of 642 approved meteorites classified as L3.   [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 30 Aug 2014
Writeuphelp
Writeup from MB 103:

Northwest Africa 8121 (NWA 8121)

(Northwest Africa)

Purchased: 2013 Feb

Classification: Ordinary chondrite (L3)

History: Purchased by Sergey Vasiliev and Marc Jost in February 2013 from a dealer in Erfoud, Morocco.

Petrography: (A. Irving and S. Kuehner, UWS) Well-formed, closely-packed, medium- to large-sized (0.5-5.5 mm, mean 2.2±0.6 mm) chondrules. One large genomict chondrite clast with similar characteristics was found. Minerals are olivine, orthopyroxene, subcalcic augite, augite, sodic plagioclase, chromite, altered kamacite and troilite.

Geochemistry: Olivine (Fa0.4-50.4, N = 9; Cr2O3 in ferroan examples is 0.04-0.12 wt.%, mean 0.07 wt.%, s.d. 0.04 wt.%, N = 7), orthopyroxene (Fs2.1-24.9Wo1.0-1.6, N= 3), subcalcic augite (Fs4.7Wo37.4), augite (Fs9.7Wo42.2).

Classification: Ordinary chondrite L. Estimation of subtype 3.5 based on histograms of Cr2O3 distribution in ferroan olivine given in Fig. 4 of Grossman and Brearley (2005).

Specimens: 39.2 g including one polished thin section at UWB. The remainder is held jointly by S. Vasiliev and M. Jost.

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:
  MB103
  Table 0
  Line 0:
Place of purchase:Erfoud
Date:P 2013 Feb
Mass (g):583
Pieces:1
Class:L3
Shock stage:S2
Weathering grade:W2
Fayalite (mol%):0.4-50.4
Ferrosilite (mol%):2.1-24.9
Wollastonite (mol%):1.0-1.6
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):39.2
Type spec location:UWB
Main mass:S. Vasiliev and M. Jost
Comments:SVMJ04; 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)
UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012)
Catalogs:
References: Published in Meteoritical Bulletin, no. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6505 approved meteorites from (Northwest Africa) (plus 2021 unapproved names)

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