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Northwest Africa 8644
Basic information Name: Northwest Africa 8644
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8644
Observed fall: No
Year found: 2002
Country: (Northwest Africa)
Mass:help 51 g
Classification
  history:
Meteoritical Bulletin:  MB 103  (2014)  L6
Recommended:  L6    [explanation]

This is 1 of 12583 approved meteorites (plus 8 unapproved names) classified as L6.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 15 Nov 2014
Writeuphelp
Writeup from MB 103:

Northwest Africa 8644 (NWA 8644)

(Northwest Africa)

Purchased: 2002 Feb

Classification: Ordinary chondrite (L6)

History: Purchased by Dick Pugh February 2002 as an "NWA meteorite" from a Moroccan trader at the Gem and Mineral show in Tucson. Donated to Cascadia in February, 2002.

Physical characteristics: Two sides of the specimen display good fusion crust and thumbprints. Another side shows broken interior, which is weathered dark.

Petrography: (K. Farley, A. Ruzicka, Cascadia) Granoblastic textured rock with poorly-defined chondrules found in thin section. Roughly 5% of the metal has been weathered.

Geochemistry: Olivine (Fa25.5±0.3, N=12), low-Ca pyroxene (Fs21.5±0.5Wo1.8±0.3En76.6±0.5, N=10), feldspar (Ab82.1±0.8Or7.0±1.0An10.9±0.3, N=6).

Classification: L6 chondrite based on mineral chemistry and texture.

Specimens: Cascadia holds the entire sample which includes 50.6 g and 1 polished thin section.

Data from:
  MB103
  Table 0
  Line 0:
Place of purchase:Tucson, Arizona, U.S.A.
Date:P 2002 Feb
Mass (g):51
Pieces:1
Class:L6
Shock stage:S2
Weathering grade:W1
Fayalite (mol%):25.5±0.3
Ferrosilite (mol%):21.5±0.5
Wollastonite (mol%):1.8±0.3
Classifier:K. Farley and A. Ruzicka, Cascadia
Type spec mass (g):50.6
Type spec location:Cascadia
Main mass:Cascadia
Comments:Lab number CML 0032; submitted by A. Ruzicka
Institutions
   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)
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:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names)

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