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Northwest Africa 4476
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:help 533 g
Meteoritical Bulletin:  MB 91  (2007)  CV3
Recommended:  CV3    [explanation]

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 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.
Physical characteristics:
The total mass of the meteorite before cutting was 533 g. It was composed of one piece with remnant fusion crust over the entire surface. The color of the meteorite was a greenish gray, with visible chondrules and CAIs on the surface.

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:
  Table 2
  Line 342:
Place of purchase:Erfoud, Morocco
Date:2005 Oct
Mass (g):533
Classifier:D. Schrader, Uaz; H. Connolly, KCCU
Type spec mass (g):25.3
Type spec location:KCCU
Main mass:Hconnolly
   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)
References: Published in Meteoritical Bulletin, no. 91, MAPS 42, 413-466 (2007)
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     This is 1 of 8904 approved meteorites from (Northwest Africa) (plus 1871 unapproved names)

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