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Northwest Africa 10517
Basic information Name: Northwest Africa 10517
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10517
Observed fall: No
Year found: 2004
Country: (Northwest Africa)
Mass:help 87.8 g
Meteoritical Bulletin:  MB 105  (2016)  L3-6
Recommended:  L3-6    [explanation]

This is 1 of 62 approved meteorites classified as L3-6.   [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 27 Feb 2016
Writeup from MB 105:

Northwest Africa 10517 (NWA 10517)

(Northwest Africa)

Purchased: 2004 Feb

Classification: Ordinary chondrite (L3-6)

History: Purchased by Richard Pugh in February 2004 from a Moroccan trader at the Tucson Gem and Mineral Show.

Physical characteristics: Partly fusion crusted individual with brownish weathering patina on broken surfaces.

Petrography: (A. Ruzicka and K. Farley, Cascadia) Breccia with ~7% metal overall, composed of an intimate mixture of mineral and chondrule fragments with diverse (type 3-6) characteristics and some larger clasts; areas between chondrules and clasts largely composed of smaller clasts. BSE imaging of thin section shows that most of the rock is composed of type 4-6 lithologies, with equilibrated olivine, and coarse plagioclase (commonly 20-70 μm and up to 120 μm long), interspersed with sharply-defined glass-bearing chondrules and chondrule fragments. One area prominently shock-blackened.

Geochemistry: (K. Farley and A. Ruzicka) Dominated by equilibrated olivine (median Fa24.4, N=68) and low-Ca pyroxene (median Fs21.0, N=67) but also containing more varied olivine (Fa4.1-38.8) and low-Ca pyroxene compositions (Fs2.9-26.1). Average of mixture including both equilibrated and more varied compositions is olivine (Fa24.4±6.1, N=68), low-Ca pyroxene (Fs18.6±5.6Wo1.5±1.1En80.0±6.3, N=67), high-Ca pyroxene (Fs9.9±1.7Wo42.9±2.8En47.2±2.9, N=19), plagioclase (Ab81.3±2.7Or 7.2±1.4An11.4±2.1, N=19), alkali feldspar (Ab59.3±2.0Or30.7±0.0An10.0±2.1, N=2).

Classification: L3-6 finely intermixed genomict breccia. Type 5-6 implied by common equilibrated olivine and coarse feldspar; type 3 implied by presence of magnesian olivine and glass in chondrules and fragments.

Specimens: Cascadia holds the entire sample, which consists of 85.3 g in two pieces, one polished thin section, and a potted butt.

Data from:
  Table 0
  Line 0:
Place of purchase:Tucson
Date:P 2004 Feb
Mass (g):87.8
Shock stage:S4
Weathering grade:W1
Classifier:K. Farley and A. Ruzicka, Cascadia
Type spec mass (g):85.3
Type spec location:Cascadia
Main mass:Cascadia
Comments:Lab number CML0142; submitted by A. Ruzicka
   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 Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full
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     This is 1 of 9776 approved meteorites from (Northwest Africa) (plus 1862 unapproved names)

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