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Northwest Africa 11121
Basic information Name: Northwest Africa 11121
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11121
Observed fall: No
Year found: 2004
Country: (Northwest Africa)
Mass:help 3.5 kg
Classification
  history:
Meteoritical Bulletin:  MB 106  (2018)  H3-6
Recommended:  H3-6    [explanation]

This is 1 of 68 approved meteorites classified as H3-6.   [show all]
Search for other: H chondrites, H chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 4 Mar 2017
Writeuphelp
Writeup from MB 106:

Northwest Africa 11121 (NWA 11121)

(Northwest Africa)

Purchased: 2004 Feb

Classification: Ordinary chondrite (H3-6)

History: A single stone was obtained by Edwin Thompson from a Moroccan Trader in Tucson, Arizona, at the February 2004 Tucson Gem and Mineral Show; a portion (53 g) was donated to Cascadia on Feb. 28, 2004.

Physical characteristics: Weathered patina, dust, and fusion crust partly cover exterior. Cut faces reveal a light brown to grey interior with chondritic texture (abundant metal, chondrules, fragments) as well as two types of clasts up to 2 cm across, including light, partly reddish stained clasts with coarser metal, and darker clasts with finer metal.

Petrography: (A. Ruzicka and K. Farley, Cascadia) A breccia composed of a mixture of mineral and chondrule fragments and some larger clasts, including a partly fragmented type 6 clast with feldspar often >50 μm across corresponding to the larger light clasts seen in cut faces, and a type 3 clast with well-defined chondrules (some glass-bearing) corresponding to the larger dark clasts seen in cut faces. Host areas between these larger clasts contain chondrule fragments of various textures down to progressively smaller sizes.

Geochemistry: Mineral compositions and geochemistry: (K. Farley and A. Ruzicka) Larger type 6 clast includes olivine (Fa19.1±0.6, N=33), low-Ca pyroxene (Fs17.6±0.6 Wo1.5±0.3, N=22), and feldspar (Ab79.7±1.5Or6.6±1.2, N=15); larger type 3 clast includes olivine (Fa15.0±8.2, N=23) and low-Ca pyroxene (Fs15.3±8.7Wo2.2±1.4, N=23); host includes olivine (Fa17.6±5.5, N=27), low-Ca pyroxene (Fs16.3±4.1Wo1.6±0.7, N=22), and feldspar (Ab84.3±6.0Or4.8±2.0, N=5).

Classification: H3-6 genomict breccia. Larger clasts consist both of type 3 and 6 lithologies and the host appears to be composed of an intimate mixture of smaller fragments of the same type of material.

Specimens: Cascadia holds three pieces (32.0, 16.6, 0.8 g), a polished thin section, and a potted butt. Thompson holds the main mass.

Data from:
  MB106
  Table 0
  Line 0:
Place of purchase:Tucson, Arizona
Date:P 2004 Feb
Mass (g):3500
Pieces:1
Class:H3-6
Shock stage:low
Weathering grade:W2
Fayalite (mol%):19.1±0.6 (type 6), 15.0±8.2 (type 3)
Ferrosilite (mol%):17.6±0.6 (type 6), 15.3±8.7 (type 3)
Wollastonite (mol%):Wo1.5±0.3 (type 6), 2.2±1.4 (type 3)
Classifier:K. Farley and A. Ruzicka, Cascadia
Type spec mass (g):49.4
Type spec location:Cascadia
Main mass:Thompson
Comments:CML0172; submitted by Alex 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)
Thompson: Edwin Thompson, 5150 Dawn St., Lake Oswego, OR 97035, United States (private address)
Catalogs:
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:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 6781 approved meteorites from (Northwest Africa) (plus 2061 unapproved names)

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