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Northwest Africa 7444
Basic information Name: Northwest Africa 7444
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 7444
Observed fall: No
Year found: 2004
Country: (Northwest Africa)
Mass:help 363 g
Meteoritical Bulletin:  MB 102  (2013)  H5
Recommended:  H5    [explanation]

This is 1 of 10324 approved meteorites (plus 18 unapproved names) classified as H5.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 1 Sep 2013
Writeup from MB 102:

Northwest Africa 7444 (NWA 7444)

(Northwest Africa)

Purchased: 2004

Classification: Ordinary chondrite (H5)

Physical characteristics: Brownish-black fusion crust is well preserved. The cut surface is metallic looking with a few mm-wide shock veins. A well-defined white-colored chondrule 4 mm in diameter stands out on the cut surface of the major piece.

Petrography: (K. Guo, ROM): Chondrules (0.1-2 mm) make up 60-70% of the thin section. The chondrule textures consist of 30-40% porphyritic olivine-pyroxene, 15-20% porphyritic olivine, 5-7% radial pyroxene, 3-5% barred olivine, and 1-3% granular. The matrix is fine to medium grained (0.2-2 mm). Metal and sulfides are 10-15% in volume. Opaque veins, millimeters to centimeters in length, up to 40 μm in width are present. The majority of olivine grains exhibit undulose extinction and a few contain planar fractures. Approximately 40% of metal and sulfides are oxidized.

Geochemistry: Olivine: Fa18.9±1.0 (N=45), low-Ca pyroxene: Fs16.2±0.7 (N=48), Fs16En82Wo1.

Classification: Ordinary chondrite H5, S3, W2.

Specimens: A total of 362.91 g is on deposit at ROM

Data from:
  Table 0
  Line 0:
Place of purchase:Tucson
Date:P 2004
Mass (g):362.91
Shock stage:S3
Weathering grade:W2
Fayalite (mol%):18.9±1.0 (N=45)
Ferrosilite (mol%):16.2±0.7 (N=48)
Wollastonite (mol%):1.2±0.3 (N=48)
Classifier:K. Guo, ROM
Type spec mass (g):362.91
Type spec location:ROM
Main mass:ROM
Comments:Submitted by Brendt Hyde
   and collections
ROM: Royal Ontario Museum, 100 Queen's Park, Toronto, Ontario M5S 2C6, Canada (institutional address; updated 18 Oct 2011)
References: Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015
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     This is 1 of 7912 approved meteorites from (Northwest Africa) (plus 1974 unapproved names)

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