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Northwest Africa 7145 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 7145 This is an OFFICIAL meteorite name. Abbreviation: NWA 7145 Observed fall: No Year found: 2011 Country: (Northwest Africa) Mass: 66 g | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 128 approved meteorites classified as CK4. [show all] Search for other: Carbonaceous chondrites, Carbonaceous chondrites (equilibrated), CK chondrites, CK chondrites (type 4-6), and CV-CK clan chondrites | ||||||||||||||||||||||||||||||
Comments: | Approved 19 Jul 2020 | ||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 109:
Northwest Africa 7145 (NWA 7145) (Northwest Africa) Purchased: 2011 Classification: Carbonaceous chondrite (CK4) History: Purchased in Temara, Morocco by Adam Aaronson in 2011. Petrography: (A. Irving and S. Kuehner, UWS; T. Bunch and J. Wittke, NAU; P. Carpenter, WUSL) Separated well-formed, granular, equilibrated chondrules containing Cr-magnetite are set in a finer grained groundmass (pale orange in thin section) containing stained Cr-magnetite. Geochemistry: Olivine (Fa31.4±0.2, range Fa31.2-31.6, N = 7), orthopyroxene (Fs26.0±0.1Wo1.0±0.1, range Fs26.0-26.2Wo0.8-1.1, N = 4), clinopyroxene (Fs6.8Wo49.3; Fs13.3Wo38.4; N = 2), magnetite (4.0-4.4 wt.% Cr2O3, N = 3), plagioclase (An47.8Or1.8). Classification: Carbonaceous chondrite (CK4). Specimens: 15.4 g including one polished thin section at PSF; remainder with Mr. A. Aaronson. | ||||||||||||||||||||||||||||||
Data from: MB109 Table 0 Line 0: |
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Institutions and collections |
NAU: Geology, Bldg 12
Knoles Dr
Northern Arizona University, Flagstaff, AZ 86011, United States; Website (institutional address; updated 12 Apr 2012) PSF: Planetary Studies Foundation,10 Winterwood Lane, Unit B, Galena, Illinois 61036-9283, United States; Website (institutional address; updated 1 Dec 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) WUSL: Washington Univ., One Brookings Drive, St. Louis, MO 63130, United States (institutional address; updated 17 Oct 2011) Aaronson: Sahara Overland Ltd., Harhora, Temara, 12000, Morocco (private address; updated 3 Jan 2010) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 109, in preparation (2020)
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Geography: |
Statistics: This is 1 of 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names) | ||||||||||||||||||||||||||||||
Also see: |
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Revision history: |
This lists important revisions made to data for this record.
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