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Northwest Africa 8665
Basic information Name: Northwest Africa 8665
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 8665
Observed fall: No
Year found: 2009
Country: (Northwest Africa)
Mass:help 19.59 kg
Classification
  history:
Meteoritical Bulletin:  MB 105  (2016)  H3
Recommended:  H3    [explanation]

This is 1 of 594 approved meteorites (plus 2 unapproved names) classified as H3.   [show all]
Search for other: H chondrites, H chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 26 Mar 2016
Writeuphelp
Writeup from MB 105:

Northwest Africa 8665 (NWA 8665)

(Northwest Africa)

Purchased: 2009 Jan

Classification: Ordinary chondrite (H3)

History: Purchased by Dr. David Gregory in January 2009 from a Moroccan dealer at the Tucson Gem and Mineral Show.

Physical characteristics: Cut surface shows that the specimen consists of about equal parts rounded chondrule-bearing clasts and very fine matrix rich in ragged metal.

Petrography: (A. Irving and S. Kuehner, UWS) Composed of clasts irregularly distributed within a much finer-grained, dark, fragmental matrix. The matrix shows no evidence of melting. The clasts contain relatively small (mean apparent diameter 500±300 μm), round to ellipsoidal, fairly closely packed chondrules and relatively abundant metal.

Geochemistry: Olivine (Fa1.7-43.7; Cr2O3 in ferroan olivine 0.07-0.14 wt.%, mean 0.13±0.08 wt.%, N = 10), orthopyroxene (Fs1.3-15.6Wo0.3-0.1, N = 3), augite (Fs5.5-7.1Wo45.2-45.5, N = 2). Magnetic susceptibility log χ (× 10-9 m3/kg) =5.45.

Classification: Ordinary chondrite (H3, breccia). H group designation based on magnetic susceptibility.

Specimens: 635 g plus five polished thin sections at ROM; one polished thin section at UWB. The remainder is held by Gregory.

Data from:
  MB105
  Table 0
  Line 0:
Place of purchase:Tucson
Date:P 2009 Jan
Mass (g):19587
Pieces:1
Class:H3
Shock stage:S4
Weathering grade:W1/2
Fayalite (mol%):1.7-43.7
Ferrosilite (mol%):1.3-15.6
Wollastonite (mol%):0.3-0.1
Magnetic suscept.:5.45
Classifier:A. Irving and S. Kuehner, UWS
Type spec mass (g):635
Type spec location:ROM
Main mass:D. Gregory
Comments:DG-089; submitted by A. Irving
Institutions
   and collections
ROM: Royal Ontario Museum, 100 Queen's Park, Toronto, Ontario M5S 2C6, Canada (institutional address; updated 18 Oct 2011)
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)
Gregory: David Gregory, 230 First Avenue, Suite 108, St. Thomas, Ontario N5R 4P5, Canada (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7005 approved meteorites from (Northwest Africa) (plus 2002 unapproved names)

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