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Northwest Africa 2403 | |||||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 2403 This is an OFFICIAL meteorite name. Abbreviation: NWA 2403 Observed fall: No Year found: 2016 Country: (Northwest Africa) Mass: 625 g | ||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 135 approved meteorites classified as Eucrite-unbr. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||||||||
Comments: | Approved 7 Nov 2019 | ||||||||||||||||||||||||||||||
Writeup |
Writeup from MB 108:
Northwest Africa 2403 (NWA 2403) (Northwest Africa) Purchased: Jan 2016 Classification: HED achondrite (Eucrite, unbrecciated) History: The meteorite was exported from Morocco to Tucson where it was purchased by N. Gessler. Physical characteristics: 85% fusion crusted, locally dull with crazing and flow lines, elsewhere wind-polished and semi-glossy. The sawn interior is fine-grained, medium gray. Petrography: The texture is unbrecciated subophitic, with grains typically 1 mm long, maximally 2 mm. Along with the usual eucrite preponderance of pyroxene and plagiolcase, minor ilmenite and silica, and very minor troilite, the rock contains scattered rather coarse Fe-metals, one of which is 1 mm long and vein-like in shape. Geochemistry: Low-Ca pyroxene clusters near Fs59Wo2, augite near Fs25Wo44, both typical for a noncumulate eucrite. Pyroxene FeO/MnO averages (9 analyses) 31.8. Two plagioclase analyses show An81-85. The bulk composition, determined by INAA and fused-bead EPMA applied to 2 chips totaling 680 mg, is fairly nondescript for a eucrite, with bulk Mg/(Mg+Fe) ~ 40 mol%, 0.9 wt% TiO2, and 0.55 wt% Na2O. Classification: Eucrite, unbrecciated. Specimens: Main mass with Gessler, type specimen at UCLA. | ||||||||||||||||||||||||||||||
Data from: MB108 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. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150
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Geography: |
Statistics: This is 1 of 9589 approved meteorites from (Northwest Africa) (plus 1869 unapproved names) | ||||||||||||||||||||||||||||||
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Revision history: |
This lists important revisions made to data for this record.
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