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Northwest Africa 8232
Basic information Name: Northwest Africa 8232
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8232
Observed fall: No
Year found: 2005
Country: (Northwest Africa)
Mass:help 73 g
Meteoritical Bulletin:  MB 103  (2014)  LL5
Recommended:  LL5    [explanation]

This is 1 of 3305 approved meteorites (plus 1 unapproved name) classified as LL5.   [show all]
Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 1 Feb 2014
Writeup from MB 103:

Northwest Africa 8232 (NWA 8232)

(Northwest Africa)

Purchased: Oct. 2005

Classification: Ordinary chondrite (LL5)

History: Edwin Thompson purchased the stone from a Moroccan trader in October 2005 and donated 17.2 g to Cascadia on Dec. 13, 2005.

Physical characteristics: Surfaces of the stone have black fusion crust. Cut surfaces show an interior with chondritic texture, gray coloration, minimal rust stains, and small amounts of metal.

Petrography: (K. Armstrong, Cascadia) In thin section the specimen shows chondritic texture with somewhat indistinct chondrules and a matrix that is largely transparent in transmitted light. Chondrule size is 1.0±0.4 mm (N=32). Metal and troilite abundances determined by pixel counting in reflected light images are 0.7 and 1.0 area%, respectively.

Geochemistry: Mineral compositions and geochemistry: Olivine Fa29.0±0.3, Fe/Mn=54.5±6.2 (N=44); low-Ca pyroxene Fs23.9±0.21Wo1.54±0.3, Fe/Mn = 32.6±3.6 (N=20).

Classification: The characteristics of this specimen are consistent with LL5 classification of low weathering and shock grade.

Specimens: 15.9 g in three pieces and a polished thin section are on deposit at Cascadia. Thompson holds the main mass.

Data from:
  Table 0
  Line 0:
Place of purchase:Munich, Germany
Date:P Oct. 2005
Mass (g):73
Shock stage:S1
Weathering grade:W1
Fayalite (mol%):29.0±0.3
Ferrosilite (mol%):23.9±0.2
Wollastonite (mol%):1.5±0.3
Classifier:K. Armstrong and A. Ruzicka, Cascadia
Type spec mass (g):15.8
Type spec location:Cascadia
Main mass:Thompson
Comments:Lab sample number CML 0372.; submitted by Alex 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)
Thompson: Edwin Thompson, 5150 Dawn St., Lake Oswego, OR 97035, United States (private address)
References: Published in Meteoritical Bulletin, no. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full
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     This is 1 of 9806 approved meteorites from (Northwest Africa) (plus 1855 unapproved names)

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