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Northwest Africa 11121 | |||||||||||||||||||||||||||||||
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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: ![]() | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 77 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 | ||||||||||||||||||||||||||||||
Writeup![]() |
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: |
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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) |
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Catalogs: |
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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.
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Geography: |
Statistics: This is 1 of 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names) |