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Northwest Africa 4476 | |||||||||||||||||||
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Basic information | Name: Northwest Africa 4476 This is an OFFICIAL meteorite name. Abbreviation: NWA 4476 Observed fall: No Year found: 2005 Country: (Northwest Africa) Mass: ![]() | ||||||||||||||||||
Classification history: |
This is 1 of 602 approved meteorites (plus 1 unapproved name) classified as CV3. [show all] Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CV chondrites, and CV-CK clan chondrites | ||||||||||||||||||
Comments: | Approved 28 Mar 2007 | ||||||||||||||||||
Writeup![]() |
Writeup from MB 91:
Northwest Africa 4476 Northwest Africa Find: October 2005 Carbonaceous chondrite (CV3) History: The sample was purchased from a meteorite dealer in Erfoud, Morocco, by MFarmer in October 2005. Petrography: (D. Schrader, UAz; H. Connolly, KCCU) The meteorite contains olivine, pyroxene, Fe,Ni metal, sulfides, chondrules, and CAIs. The meteorite is dominated by large chondrules (0.12–1.1 mm) and a fine-grained matrix. The majority of the chondrules are sharply defined. The textural types of chondrule observed are C, GO, POP, PO, and one BO. The BO chondrule has a Ca-Al rich mesostases. The section contains several type A CAIs (both compact and fluffy). Mineral compositions and geochemistry: (D. Schrader, D. Lauretta, M. Kilgore, K. Domanik, and D. Hill, UAz) (EMP at UAz) The chondrules contain Fa0.3–8.5 (average = Fa2.8±2.4), Fs1.1–1.8 (average = Fs1.3±0.3) and Wo0.8–1.3 (average = Wo0.95±0.2). Matrix olivine = Fa57.4. Classification: Carbonaceous chondrite (CV3). Type specimen: A total of 25.3 g is on deposit at UAz. KCCU holds the main mass. | ||||||||||||||||||
Data from: MB91 Table 2 Line 342: |
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Institutions and collections |
KCCU: Kingsborough College of the City University of New York, Brooklyn, NY 11235, United States (institutional address; updated 28 Dec 2011) UAz: Lunar and Planetary Laboratory, University of Arizona, 1629 E. University Blvd., Tucson, AZ 85721, United States (institutional address; updated 14 Jan 2012) MFarmer: Michael Farmer, P.O. Box 86059, Tucson, AZ 85754-6059, United States; Website (private address) HConnolly: Harold C. Connolly Jr., Dept. Physical Sciences, Kingsborough-CUNY, 2001 Oriental Boulevard, Brooklyn, NY 11235, United States (private address) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 91, MAPS 42, 413-466 (2007)
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Geography: |
Statistics: This is 1 of 8904 approved meteorites from (Northwest Africa) (plus 1871 unapproved names) |