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Northwest Africa 10816
Basic information Name: Northwest Africa 10816
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10816
Observed fall: No
Year found: 2009
Country: (Northwest Africa)
Mass:help 6.98 kg
Meteoritical Bulletin:  MB 105  (2016)  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 27 Aug 2016
Writeup from MB 105:

Northwest Africa 10816 (NWA 10816)

(Northwest Africa)

Purchased: Feb 2009

Classification: Ordinary chondrite (LL5)

History: Purchased by James Tobin in February 2009 from a dealer at the Tucson Gem show

Petrography: Easily discerned chondrules and chondrule fragments (up to 2 mm, with 1-1.5 mm diameter not infrequent) in a recrystallized matrix. Contains roughly 1-2% metal, and numerous chromite-plagioclase assemblages.

Geochemistry: Olivine (Fa26.1±0.7, N=47); orthopyroxene (Fs22.2±1.0Wo1.7±0.5, N=22); plagioclase feldspar (Ab84.2±1.8Or5.5±2.2, N=5)

Classification: Ordinary chondrite (LL5) based on olivine and pyroxene compositions and large chondrule sizes.

Specimens: Cascadia holds 186.7 g in multiple pieces, in addition to one polished thin section and a mounted butt

Data from:
  Table 0
  Line 0:
Place of purchase:Tucson, AZ
Date:P Feb 2009
Mass (g):6978
Shock stage:S3
Weathering grade:W2
Fayalite (mol%):26.1±0.7
Ferrosilite (mol%):22.2±1.0
Wollastonite (mol%):1.7±0.5
Classifier:M. Hutson and A. Ruzicka, Cascadia
Type spec mass (g):186.7
Type spec location:Cascadia
Main mass:Jtobin
Comments:Lab number CML 0853; submitted by M. Hutson
   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)
Tobin: J. Tobin, The Meteorite Exchange, PMB #455, P.O. Box 7000, Redondo Beach, CA 90277, United States (private address)
JTobin: The Meteorite Exchange, Inc., United States; Website (private address; updated 28 Aug 2013)
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 9790 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)

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