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Northwest Africa 4018 | |||||||||||||||||
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Basic information | Name: Northwest Africa 4018 This is an OFFICIAL meteorite name. Abbreviation: NWA 4018 Observed fall: No Year found: 2005 Country: (Northwest Africa) Mass: 158.6 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 3 Feb 2006 | ||||||||||||||||
Writeup |
Writeup from MB 90:
Northwest Africa 4018 Northwest Africa Find: 2005 Achondrite (eucrite, polymict) History: A single stone of 158.6 g was found in 2005 in the western part of the Sahara in Morocco. Petrography: (A. Greshake, MNB) A polymict breccia composed of lithic and mineral clasts set into a fine-grained brecciated groundmass. The lithic clasts are mostly fine- or coarse-grained basaltic fragments with rare impact melt clasts. Mineral fragments are dominantly plagioclase and exsolved Ca pyroxene. Minor phases include silica, Al-Ti-chromite, and ilmenite. Geochemistry: Plagioclase (An87–92.2), pyroxene (Fs42.9–54.0Wo2.7–19.0). Classification: Achondrite (eucrite, polymict); moderate shock, moderate weathering. Specimens: A 23.1 g type specimen and one polished thin section are on deposit at MNB. HSSH-Pirmasens of Germany holds the main mass. | ||||||||||||||||
Data from: MB90 Table 2 Line 240: |
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Institutions and collections |
MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 90, MAPS 41, 1383-1418 (2006)
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Geography: |
Statistics: This is 1 of 9710 approved meteorites from (Northwest Africa) (plus 1853 unapproved names) | ||||||||||||||||
Also see: |
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Revision history: |
This lists important revisions made to data for this record.
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