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Northwest Africa 12351
Basic information Name: Northwest Africa 12351
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 12351
Observed fall: No
Year found: 2017
Country: Morocco
Mass:help 498 g
Classification
  history:
Meteoritical Bulletin:  MB 107  (2018)  H5
Recommended:  H5    [explanation]

This is 1 of 10565 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 27 Nov 2018
Writeuphelp
Writeup from MB 107:

Northwest Africa 12351 (NWA 12351)

Morocco

Purchased: 2017 Feb

Classification: Ordinary chondrite (H5)

Physical characteristics: Repository specimen has a fresh surface.

Petrography: (C. Zhu, UWO) Mostly granular pyroxene chondrule (200-500 µm) and porphyritic pyroxene chondrules (200-600 µm) Mostly barred olivine, radial olivine (200-400 µm) and porphyritic olivine (200-300 µm). Plagioclase grains range from 10 to 40 µm in diameter with tabular shape. Olivine and pyroxene grains show undulatory extinction, and some display planar fractures. Fe-Ni metal (~10-15 vol%) is slightly oxidized. Other phases found include Fe-Ni-sulfides, and minor chromite and chlorapatite.

Geochemistry: (EMPA, M. Beauchamp, UWO) Olivine (Fa18.8±0.5; 18.2-19.6; Fe/Mn = 36.7±2.0; n=15), low-Ca pyroxene (Fs15.9±1.7Wo0.5±0.3; Fs13.3-19.2Wo0.1-1.1; Fe/Mn =28.5±8.8; n=10), and plagioclase An12.2±2.9 (An5.6-17.8; n=10).

Classification: Ordinary chondrite (H5, S3, W1)

Specimens: 32.2 g including a polished thin section are on deposit at UWO. S. Tutorow holds the main mass.

Data from:
  MB107
  Table 0
  Line 0:
Place of purchase:Erfoud, Morocco
Date:P 2017 Feb
Mass (g):498.3
Pieces:1
Class:H5
Shock stage:S3
Weathering grade:W1
Fayalite (mol%):18.8±0.5 (N=15)
Ferrosilite (mol%):15.9±1.7 (N=10)
Wollastonite (mol%):0.5±0.3 (N=10)
Classifier:C. Zhu, UWO
Type spec mass (g):32.2
Type spec location:UWO
Main mass:S. Tutorow
Comments:G710; submitted by A. Bouvier, UWO
Institutions
   and collections
UWO: University of Western Ontario, Department of Earth Sciences, BGS 1026, 1151 Richmond St. N, London, Ontario, Canada N6A 5B7, Canada (institutional address; updated 18 Jul 2015)
Catalogs:
References: Published in Meteoritical Bulletin, no. 107, MAPS 55, 460-462
Find references in NASA ADS:
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Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1680 approved meteorites from Morocco (plus 25 unapproved names) (plus 1 impact crater)

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