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Northwest Africa 7055 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 7055 This is an OFFICIAL meteorite name. Abbreviation: NWA 7055 Observed fall: No Year found: 2007 Country: (Northwest Africa) Mass: 26.9 g | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 15 approved meteorites classified as CK4/5. [show all] Search for other: Carbonaceous chondrites, Carbonaceous chondrites (equilibrated), CK chondrites, CK chondrites (type 4-6), and CV-CK clan chondrites | ||||||||||||||||||||||||||||||
Comments: | Approved 27 Mar 2018 | ||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 107:
Northwest Africa 7055 (NWA 7055) (Northwest Africa) Purchased: 2007 Jan Classification: Carbonaceous chondrite (CK4/5) History: Purchased by Dr. David DGregory in January 2007 from a dealer at the Tucson Gem and Mineral Show. Petrography: (A. Irving and S. Kuehner, UWS) Very fresh specimen consisting of separated chondrules (apparent diameter 0.2-2.0 mm) containing Cr-magnetite set within a relatively coarse grained matrix. The texture is transitional between type 4 and type 5. Geochemistry: Olivine (Fa30.9-31.1, N = 2), orthopyroxene (Fs25.4-26.3Wo0.5-0.9, N = 3), clinopyroxene (Fs9.4-11.2Wo46.5-42.6, N = 2), one exotic ferroan olivine grain (Fa62.7). Classification: Carbonaceous chondrite (CK4/5). Specimens: The entire specimen plus a polished thin section and polished thick section at ROM. | ||||||||||||||||||||||||||||||
Data from: MB107 Table 0 Line 0: |
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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) DGregory: David Gregory, 230 First Avenue, Suite 108, St. Thomas, Ontario N5R 4P5, Canada (private address) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 107, MAPS 55, 460-462
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Geography: |
Statistics: This is 1 of 9710 approved meteorites from (Northwest Africa) (plus 1853 unapproved names) | ||||||||||||||||||||||||||||||
Also see: |
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Revision history: |
This lists important revisions made to data for this record.
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