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Northwest Africa 12351 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 12351 This is an OFFICIAL meteorite name. Abbreviation: NWA 12351 Observed fall: No Year found: 2017 Country: Morocco Mass: 498 g | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 11568 approved meteorites (plus 23 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 | ||||||||||||||||||||||||||||||
Writeup |
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: |
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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) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 107, MAPS 55, 460-462
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Geography: |
Statistics: This is 1 of 2082 approved meteorites from Morocco (plus 31 unapproved names) (plus 1 impact crater) | ||||||||||||||||||||||||||||||
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Revision history: |
This lists important revisions made to data for this record.
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