MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 21 Jul 2024
Search for: Search type: Search limits: Display: Publication:
Text help
Starts with
Sounds like
Falls  Non-NWAs
What's new
  in the last:
Limit to approved meteorite names
Search text:  
Northwest Africa 11229
Basic information Name: Northwest Africa 11229
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11229
Observed fall: No
Year found: 2014
Country: (Northwest Africa)
Mass:help 514 g
Meteoritical Bulletin:  MB 106  (2018)  L6
Recommended:  L6    [explanation]

This is 1 of 12995 approved meteorites (plus 11 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 21 Apr 2017
Writeup from MB 106:

Northwest Africa 11229 (NWA 11229)

(Northwest Africa)

Purchased: 2014 Apr

Classification: Ordinary chondrite (L6)

History: A NWA specimen was donated to Cascadia by Dick Pugh, who purchased it from Patrick Thompson/ET Meteorites in April 2014.

Physical characteristics: A single, faceted and regmaglypted individual has brownish-black exterior with partially weathered fusion crust. Cut surfaces reveal chondritic texture with prominent shock veins.

Petrography: In thin section granoblastic texture predominant and chondrules are barely recognizable, consistent with type 6. Contains ~5-6% metal and ~3-4% troilite (visual estimates). Shock stage S4 (conventional), S3.8±0.9 (weighted), with abundant maskelynite and a prominent, branching shock melt vein over 1 mm wide in places.

Geochemistry: Olivine Fa26.2±0.8 (N=26); low-Ca pyroxene Fs22.3±1.7 Wo1.6±0.5 (N=24); high-Ca pyroxene Fs8.0±1.6 Wo45.7±2.0 (N=15); maskelynite Ab80.6±1.4 Or7.6±1.5 (N=17)

Classification: L6 chondrite based on texture, metal content and composition of olivine and low-Ca pyroxene.

Specimens: Cascadia holds the entire sample (type specimen), which consists of ~499 g in 6 pieces, one potted butt, and 1 thin section.

Data from:
  Table 0
  Line 0:
Place of purchase:Portland, Oregon
Date:P 2014 Apr
Mass (g):513.8
Shock stage:S4
Weathering grade:W1
Fayalite (mol%):26.2±0.8
Ferrosilite (mol%):22.3±1.7
Wollastonite (mol%):1.6±0.5
Classifier:M. Soiseth and A. Ruzicka, Cascadia
Type spec mass (g):498.7
Type spec location:Cascadia
Main mass:Cascadia
Comments:Lab number CML0804; 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 Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.
Find references in NASA ADS:
Find references in Google Scholar:

     This is 1 of 9829 approved meteorites from (Northwest Africa) (plus 1851 unapproved names)

Direct link to this page