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Northwest Africa 2887 | |||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 2887 This is an OFFICIAL meteorite name. Abbreviation: NWA 2887 Observed fall: No Year found: 2016 Country: (Northwest Africa) Mass: 887 g | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 595 approved meteorites (plus 1 unapproved name) classified as Eucrite. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||||||
Comments: | Approved 11 May 2018 | ||||||||||||||||||||||||||||
Writeup |
Writeup from MB 107:
Northwest Africa 2887 (NWA 2887) (Northwest Africa) Purchased: 2016 Classification: HED achondrite (Eucrite) Physical characteristics: Weathered, slight red caliche stain, 90% covered by dull black fusion crust. Petrography: (P. Warren, UCLA) The rock is dominated by pyroxene and plagioclase. Its texture is unbrecciated and for the most part fine-grained, but uncommonly heterogeneous: locally coarse (laths up to 4 mm), and elsewhere locally equigranular with 120-degree triple junctions. Geochemistry: Mineral compositions and geochemistry: Low-Ca pyroxene: Fs57.5±0.3Wo6.3±0.2 (N=7), high-Ca pyroxene: Fs28.8±0.1Wo41.5±0.2 (N=3). Plagioclase: 5 analyses, range An89.4-92.0. For trace metal component, a single analysis found 0.34 wt% Co, 0.04 wt% Ni. Bulk composition results from INAA and fused-bead EPMA include Al2O3 = 12.5 wt%, Mg# = 40 mol%, Sm = 1.9 ppm. Classification: The meteorite is a eucrite. Specimens: manifestly paired stones of 570, 275 and 42 g. | ||||||||||||||||||||||||||||
Data from: MB107 Table 0 Line 0: |
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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) Gessler: Nicholas Gessler, 2010 Calgary Lane, Los Angeles, CA 90077, United States (private address; updated 7 Jul 2016) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 107, MAPS 55, 460-462
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Geography: |
Statistics: This is 1 of 9589 approved meteorites from (Northwest Africa) (plus 1869 unapproved names) | ||||||||||||||||||||||||||||
Also see: |
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Revision history: |
This lists important revisions made to data for this record.
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