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Northwest Africa 1000 | |||||||||||||||||
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Basic information | Name: Northwest Africa 1000 This is an OFFICIAL meteorite name. Abbreviation: NWA 1000 Observed fall: No Year found: 2001 Country: (Northwest Africa) Mass: 1200 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 | ||||||||||||||||
Writeup |
Writeup from MB 86:
Northwest Africa 1000 Morocco Purchased 2001 Achondrite (eucrite) One stone, which was probably recovered in Morocco, was purchased by DGregory. The stone has a reported total weight of 1200 g. Mineralogy and classification (P. Warren, UCLA): subophitic and slightly variolitic (fan-spherulitic) texture with laths of plagioclase (up to 4 mm long) and pyroxene (up to 5 mm). Pyroxenes are zoned from En68Wo4 to En16Wo26 with an offshoot from the main trend toward En40Wo3 resulting from a reaction of early pigeonite with intruded veins of fayalitic olivine (Fo16–25). About half of the plagioclase has been shock-altered to isotropic glass (maskelynite), average An83 (range An75–86, n = 29). Bulk composition and ratios of Ga/Al = 0.020 and Fe/Mn = 38 support its classification as eucrite (Warren, 2002). Moderately weathered as shown by carbonate veining. Specimens: type specimen, 22 g, and one thin section, UCLA; main mass, DGregory. | ||||||||||||||||
Data from: MB86 Table 6 Line 95: |
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Institutions and collections |
UCLA: Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095-1567, United States (institutional address; updated 17 Oct 2011) DGregory: David Gregory, 230 First Avenue, Suite 108, St. Thomas, Ontario N5R 4P5, Canada (private address) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 86, MAPS 37, A157-A184 (2002)
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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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