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Northwest Africa 8058
Basic information Name: Northwest Africa 8058
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8058
Observed fall: No
Year found: 2013
Country: (Northwest Africa)
Mass:help 31.4 g
Classification
  history:
Meteoritical Bulletin:  MB 103  (2014)  L3
Recommended:  L3    [explanation]

This is 1 of 704 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 8058 (NWA 8058)

(Northwest Africa)

Purchased: 2013 Jul

Classification: Ordinary chondrite (L3)

History: Purchased by Gary Fujihara in July 2013 from a Moroccan dealer.

Petrography: (A. Irving and S. Kuehner, UWS) Fairly closely packed, medium-sized (0.6-3.1 mm, mean 1.7±1.0 mm) chondrules are set in a black matrix. Minerals are olivine, orthopyroxene, subcalcic augite, augite, sodic plagioclase, chromite, stained kamacite and troilite.

Geochemistry: Olivine (Fa0.7-47.5, N = 10; Cr2O3 in ferroan examples is 0.04-0.32 wt.%, mean 0.11 wt.%, s.d. 0.10 wt.%, N = 8), orthopyroxene (Fs4.4-31.4Wo0.4-1.9, N=3), subcalcic augite (Fs13.1Wo28.5; Fs25.0Wo36.6), augite (Fs11.4Wo41.5).

Classification: Ordinary chondrite (L3). Estimation of subtype is 3.4 based on histograms of Cr2O3 distribution in ferroan olivine given in Fig. 4 of Grossman and Brearley (2005).

Specimens: 7.2 g including one polished thin section at UWB. The remainder is held by G. Fujihara.

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:Morocco
Date:P 2013 Jul
Mass (g):31.4
Pieces:1
Class:L3
Shock stage:S2
Weathering grade:W1
Fayalite (mol%):0.7-47.5
Ferrosilite (mol%):4.4-31.4
Wollastonite (mol%):0.4-1.9
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):7.2
Type spec location:UWB
Main mass:G. Fujihara
Comments:GF13-8; 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 7296 approved meteorites from (Northwest Africa) (plus 1980 unapproved names)

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