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Northwest Africa 8620 | |||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 8620 This is an OFFICIAL meteorite name. Abbreviation: NWA 8620 Observed fall: No Year found: 2013 Country: Morocco Mass: 10.3 g | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 603 approved meteorites (plus 1 unapproved name) classified as Eucrite. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||||||
Comments: | Approved 25 Nov 2014 | ||||||||||||||||||||||||||||
Writeup |
Writeup from MB 103:
Northwest Africa 8620 (NWA 8620) Morocco Purchased: 2013 Classification: HED achondrite (Eucrite) History: Purchased in 2013 in Agadir Physical characteristics: Full crusted stone. The fusion crust is unusually dull for a eucrite. Cut surface reveals a homogeneous, fine-grained, light-gray interior with rare mm-sized darker clasts. Petrography: (J. Gattacceca, CEREGE) Igneous rock with ophitic to subopthitic texture. A few mm-sized clasts with quenched texture (grain size <1 μm). Main minerals are pyroxene (mostly exsolved, less commonly zoned) and plagioclase with typical grain size 50 μm. Accessory minerals: chromite, ilmenite (to 50 μm), SiO2, FeS (to 30 μm). Rare FeNi (to 20 μm) Geochemistry: Pyroxene Fs33.8-57.0Wo8.3-16.3, FeO/MnO = 32.6±2.0 (N=6). Plagioclase An83.6±0.4Ab15.5±0.3Or0.9±0.1 (N=4). Magnetic susceptibility log χ = 2.83 (χ in 10-9 m3/kg). Classification: Achondrite (basaltic eucrite). Low weathering Specimens: 2.5 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 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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