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Northwest Africa 12449
Basic information Name: Northwest Africa 12449
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12449
Observed fall: No
Year found: 2012
Country: Morocco
Mass:help 15.89 kg
Classification
  history:
Meteoritical Bulletin:  MB 108  (2020)  H4
Recommended:  H4    [explanation]

This is 1 of 6493 approved meteorites (plus 2 unapproved names) classified as H4.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 2 Feb 2019
Writeuphelp
Writeup from MB 108:

Northwest Africa 12449 (NWA 12449)

Morocco

Purchased: 2012 Feb

Classification: Ordinary chondrite (H4)

History: Purchased from Moroccan meteorite dealer in 2012.

Physical characteristics: Physical Characteristics: Single stone, black rough irregular exterior with minor patches of caliche. Saw cut shows numerous chondrules and clasts set in a dark-green matrix.

Petrography: (K. Domanik and F. Stephan, UAz) Microprobe examination of a polished mount shows numerous distinct round to irregularly shaped equilibrated chondrules 200-800 μm in size. POP, PO, and BO chondrules predominate with a few RP chondrules also present. 10-50 μm plagioclase patches occur almost exclusively within chondrules and typically contain abundant small crystals of clinopyroxene. The matrix consists of smaller chondrule fragments and numerous veins and patches of moderately oxidized kamacite, taenite and troilite. Minor amounts of chromite and merillite are also present.

Geochemistry: Mineral compositions and geochemistry: (K. Domanik and F. Stephan, UAz) Olivine Fa19.1±0.2, Fe/Mn=36.4±2.0, n=40; low-Ca pyroxene Fs16.5±0.3Wo1.6±0.6, Fe/Mn=22.9±1.8, n=26.

Classification: Ordinary Chondrite (H4), Weathering grade W2.

Specimens: 29.3 g including probe mount on deposit at UAz, Blaine Reed holds the main mass.

Data from:
  MB108
  Table 0
  Line 0:
Place of purchase:Tucson, AZ
Date:P 2012 Feb
Mass (g):15890
Pieces:1
Class:H4
Shock stage:moderate
Weathering grade:W2
Fayalite (mol%):19.1±0.2
Ferrosilite (mol%):16.5±0.3
Wollastonite (mol%):1.6±0.6
Classifier:K. Domanik and F. Stephan, UAz
Type spec mass (g):29.3
Type spec location:UAz
Main mass:Blaine Reed
Comments:Work name BR103; submitted by K. Domanik
Institutions
   and collections		 UAz: Lunar and Planetary Laboratory, University of Arizona, 1629 E. University Blvd., Tucson, AZ 85721, United States (institutional address; updated 14 Jan 2012)
Reed: Blaine Reed, P.O. Box 1141, Delta, CO 81416, United States; Website (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150
Find references in NASA ADS:
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Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 2082 approved meteorites from Morocco (plus 31 unapproved names) (plus 1 impact crater)
Also see:
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Revision
  history:
  This lists important revisions made to data for this record.

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