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Northwest Africa 1232
Basic information Name: Northwest Africa 1232
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 1232
Observed fall: No
Year found: 2001
Country: Morocco
Mass:help 1900 g
Classification
  history:
Meteoritical Bulletin:  MB 93  (2008)  CO3
Recommended:  CO3    [explanation]

This is 1 of 650 approved meteorites (plus 1 unapproved name) classified as CO3.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CM-CO clan chondrites, and CO chondrites
Comments: Approved 14 Jan 2008
Revised 21 Jun 2009: added missing paragraph from writeup
Writeuphelp
Writeup from MB 93:

Northwest Africa 1232                                                                                        

Morocco

Find: May 2001

Carbonaceous chondrite (CO3)

History: In May 2001 B. Fecay and C. Bidaut purchased the stone in Zagora, Morocco.

Physical characteristics:  A single piece weighing 1900 g.  Approximately 40 % of its surface is covered by fusion crust.

Petrography: (M. Kiriishi and K. Tomeoka, UKobe) Two different lithologies separated by a sharp boundary; lithology A is dark gray, lithology B is light gray. Both lithologies contain well defined chondrules set in a fine-grained matrix. Lithology A consists of ~ 53% chondrules, ~ 2% CAIs, and ~ 7% AOIs (all vol%), whereas lithology B consists of ~ 50% chondrules, ~ 3% CAIs, and ~ 5% AOIs (all vol%). Chondrules in lithology A range in apparent diameter from 50-510 mm with an average of ~ 128 mm, whereas those in lithology B range from 50-500 mm (average ~ 147 mm).

Mineral compositions and geochemistry: Lithology A: Chondrule olivine (Fa3–Fa20; mean Fa11). CAI minerals:
Spinel (mean Hc33), anorthite (An99), melilite and minor nepheline. Lithology B: Chondrule olivine (Fa15–Fa40; mean Fa30), CAI minerals: Spinel (mean Hc51), diopside (En51Wo49), fassaite, minor nepheline.
Classification: Carbonaceous chodrite (CO3).

Type specimens: A total of 52 g are on deposit at UKobe. Fectay holds the main mass.

Submitted by: K. Tomeoka, UKobe.

Data from:
  MB93
  Table 2
  Line 2:
Place of purchase:Zagora, Morocco
Date:01-May-08 [sic]
Mass (g):1900
Pieces:1
Class:CO3
Type spec mass (g):52
Institutions
   and collections
UKobe: Curator, Antarctic Meteorite Research Center National Institute of Polar Research (NIPR) 10-3 Midori-cho, Tachikawa, Tokyo 190-8518, Japan, Japan; Website (institutional address; updated 13 Jan 2012)
Fectay: Bruno Fectay and Carine Bidaut, La Memoire de la Terre SARL, 39800 Aumont, France; Website (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 93, MAPS 43, 571-632 (2008)
Find references in NASA ADS:
Find references in Google Scholar:
Photos:
CreditPhotos
Photos from the Encyclopedia of Meteorites:
Bruno Fectay and Carine Bidaut   
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Mike Markowitz   
Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 2046 approved meteorites from Morocco (plus 31 unapproved names) (plus 1 impact crater)

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