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Northwest Africa 8474 | |||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 8474 This is an OFFICIAL meteorite name. Abbreviation: NWA 8474 Observed fall: No Year found: 2013 Country: (Northwest Africa) Mass: 24 g | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 598 approved meteorites (plus 1 unapproved name) classified as Eucrite. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||||||
Comments: | Approved 26 Jul 2014 | ||||||||||||||||||||||||||||
Writeup |
Writeup from MB 103:
Northwest Africa 8474 (NWA 8474) (Northwest Africa) Purchased: 2013 Jun Classification: HED achondrite (Eucrite) History: Purchased in 2013 in Zagora Physical characteristics: Cut surface reveals a gray coarse brecciated interior. Petrography: (J. Gattacceca, CEREGE) Brecciated ophitic to subophitic coarse basalt with crystal between 1 mm and 3 mm. Mineralogy: pigeonite with augite exsolution, plagioclase, accessory silica, chromite, ilmenite, Ca-phosphate, troilite, rare metal. Some pyroxenes are zoned, with outer rim enriched in iron. Geochemistry: Pigeonite Fs35.7-59.1Wo6.9-26.9, FeO/MnO= 34.8±3.5 (n=13). Augite exsolution Fs30.7Wo43.5 (N=1). Orthopyroxene Fs65.8Wo2.5 (N=1). Plagioclase An78.2±2.2Ab20.0±1.8Or1.8±0.4 (N=7). Magnetic susceptibility log χ = 2.91 (χ in 10-9 m3/kg). Classification: Achondrite (basaltic polymict eucrite). The polymict character is evidenced by the presence of both exsolved and zoned pyroxenes. Moderate weathering. Specimens: 5 g in CEREGE, main mass with Labenne | ||||||||||||||||||||||||||||
Data from: MB103 Table 0 Line 0: |
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Institutions and collections |
CEREGE: CEREGE
BP 80
Avenue Philibert, Technopole de l'Arbois
13545 Aix-en-Provence Cedex 4
France, France (institutional address; updated 10 Jun 2023) Labenne: 23, rue de Esperance, 75013 Paris, France; Website (private address; updated 29 Aug 2012) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full
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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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