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Northwest Africa 4654
Basic information Name: Northwest Africa 4654
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 4654
Observed fall: No
Year found: 2006
Country: Algeria
Mass:help 49 g
Classification
  history:
Meteoritical Bulletin:  MB 93  (2008)  Diogenite
Recommended:  Diogenite    [explanation]

This is 1 of 522 approved meteorites classified as Diogenite.   [show all]
Search for other: Achondrites, Diogenites, and HED achondrites
Comments: Approved 1 Jan 2008
Revised 4 Aug 2008: final writeup
Writeuphelp
Writeup from MB 93:

Northwest Africa 4654

Algeria

Find: 2006

Achondrite (diogenite)

History and physical description: A 49 g stone with patchy fresh fusion crust was found in Algeria in 2006 and purchased in Erfoud, Morocco, by A. Aaronson in July 2006.

Petrography: (J. Wittke and T. Bunch, NAU) Coarse-grained orthopyroxene (<7 mm in diameter) enclose large chromite grains (1 to 2.6 mm). Tiny troilite grains (<0.02 mm) are widespread in the matrix.

Mineral compositions and Geochemistry: Orthopyroxene (Fs21.6-22.6Wo1.7-2.1), chromite (Cr/(Cr + Al) = 0.79).

Classification: Achondrite (diogenite); minimal shock and weathering.

Type specimens: A 10.2 g specimen is on deposit at NAU. Aaronson holds the main mass.

Submitted by: T. Bunch, NAU.

Data from:
  MB93
  Table 2
  Line 87:
Place of purchase:Algeria/Erfoud Morocco,
Date:07-Jul-08
Mass (g):49
Pieces:1
Class:Dio
Type spec mass (g):10.2
Institutions
   and collections		 NAU: Geology, Bldg 12 Knoles Dr Northern Arizona University, Flagstaff, AZ 86011, United States; Website (institutional address; updated 12 Apr 2012)
Aaronson: Sahara Overland Ltd., Harhora, Temara, 12000, Morocco (private address; updated 3 Jan 2010)
Catalogs:
References: Published in Meteoritical Bulletin, no. 93, MAPS 43, 571-632 (2008)
Find references in NASA ADS:
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Geography:

Algeria
Coordinates:Unknown.

Statistics:
     This is 1 of 1356 approved meteorites from Algeria (plus 30 unapproved names) (plus 4 impact craters)
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Revision
  history:
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