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Northwest Africa 7443 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 7443 This is an OFFICIAL meteorite name. Abbreviation: NWA 7443 Observed fall: No Year found: 2004 Country: (Northwest Africa) Mass: 144.6 g | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 394 approved meteorites classified as LL4. [show all] Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7) | ||||||||||||||||||||||||||||||
Comments: | Approved 19 Nov 2013 | ||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 102:
Northwest Africa 7443 (NWA 7443) (Northwest Africa) Purchased: 2004 Classification: Ordinary chondrite (LL4) Physical characteristics: Remnant fusion crust. Brown meteorite with a few surface depressions resulting from eroded chondrules. Chondrules up to 5 mm in diameter are visible on the exterior. Petrography: (K. Guo, ROM): Chondrules (up to 2 mm) make up 70-80% of the thin section. Chondrule types include 40% porphyritic olivine, 40% porphyritic pyroxene. 3-5% barred olivine, 3-5% radial pyroxene and 3-5% granular. The majority of olivine grains exhibit sharp extinction. Metal and sulfides (60 to 70% oxidized) are 10-15% in volume. Geochemistry: Olivine Fa27.6±0.5 (N=16), low-Ca pyroxene Fs18.9±4.9En89Wo2 (N=25), and high-Ca pyroxene Fs15.7±12.3En40Wo44 (N=5); PMD FeO olivine=0.95 and PMD FeO low-Ca pyroxene=22; σ-Cr2O3=0.27, mean Cr2O3=0.24. Classification: Ordinary chondrite L4, S1, W3. Specimens: A total of 144.56 g is on deposit at ROM. | ||||||||||||||||||||||||||||||
Data from: MB102 Table 0 Line 0: |
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Institutions and collections |
ROM: Royal Ontario Museum, 100 Queen's Park, Toronto, Ontario M5S 2C6, Canada (institutional address; updated 18 Oct 2011) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 102, MAPS 50, 1662, September 2015
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Geography: |
Statistics: This is 1 of 9627 approved meteorites from (Northwest Africa) (plus 1865 unapproved names) | ||||||||||||||||||||||||||||||
Also see: |
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Revision history: |
This lists important revisions made to data for this record.
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