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Northwest Africa 10883
Basic information Name: Northwest Africa 10883
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10883
Observed fall: No
Year found: 2012
Country: Morocco
Mass:help 1545 g
Meteoritical Bulletin:  MB 105  (2016)  H4
Recommended:  H4    [explanation]

This is 1 of 6313 approved meteorites (plus 2 unapproved names) classified as H4.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 15 Oct 2016
Writeup from MB 105:

Northwest Africa 10883 (NWA 10883)


Purchased: April 2012

Classification: Ordinary chondrite (H4)

History: Purchased in Alnif, Morocco, in April 2012 by Fred Olsen, who was told it had been found near Zagora, Morocco. Material for classification subsequently donated to Cascadia.

Physical characteristics: A single stone 40% black crusted, with abundant chondrules visible on broken surface. Cut face shows brown interior with chondritic texture and abundant metal.

Petrography: Contains abundant metal and troilite (approximately 10% metal and 5% troilite) with minimal (roughly 5%) replacement by weathering product. Chondrules are well-defined with a mean diameter of 0.4±0.2 mm (N=150). Olivine grains display uniform extinction in cross-polarized light. Contains chromite-plagioclase assemblages and clinoenstatite.

Geochemistry: Olivine (Fa18.8±0.8, N = 90), low-Ca pyroxene (Fs17.0±1.4Wo1.1±0.9, N = 76), high-Ca pyroxene (Fs6.6±2.7Wo 45.0±5.1, N = 24)

Specimens: Cascadia holds 27.1 g, a polished thin section, and a mounted butt. Fred Olsen holds the main mass.

Data from:
  Table 0
  Line 0:
Place of purchase:Alnif Morocco
Date:P April 2012
Mass (g):1545
Shock stage:S1
Weathering grade:W1
Fayalite (mol%):18.8±0.8
Ferrosilite (mol%):17.0±1.4
Wollastonite (mol%):1.1±0.9
Classifier:M. Ream, A. Ruzicka, M. Hutson, Cascadia
Type spec mass (g):27.1
Type spec location:Cascadia
Main mass:Fred Olsen
Comments:Lab number CML0684, main mass holder’s number FO2012-11; 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)
Olsen: Unknown person (private address; updated 17 Apr 2009)
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 1741 approved meteorites from Morocco (plus 26 unapproved names) (plus 1 impact crater)

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