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Northwest Africa 2409
Basic information Name: Northwest Africa 2409
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 2409
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass:help 1822 g
Meteoritical Bulletin:  MB 108  (2020)  Eucrite-unbr
Recommended:  Eucrite-unbr    [explanation]

This is 1 of 127 approved meteorites classified as Eucrite-unbr.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 7 Nov 2019
Writeup from MB 108:

Northwest Africa 2409 (NWA 2409)

(Northwest Africa)

Purchased: Jan 2018

Classification: HED achondrite (Eucrite, unbrecciated)

History: The meteorite was exported from Morocco to Tucson where it was purchased by N. Gessler.

Physical characteristics: 70% of surface was a glossy fusion crust. Virtually no caliche on surface. The interior shows a uniform, unbrecciated, relatively coarse-grained basalt; light grey overall, with medium-gray pyroxene and white plagioclase.

Petrography: The texture is unbrecciated subophitic, relatively coarse for a eucrite with grains typically 2-3 mm across, up to 4 mm long. The mode shows a typical eucrite preponderance of pyroxene and plagiolcase, with minor ilmenite and silica, and very minor troilite.

Geochemistry: Low-Ca pyroxene clusters near Fs58Wo3, augite near Fs25Wo44, both typical for a noncumulate eucrite. Pyroxene FeO/MnO averages (23 analyses) 29.8. Plagioclase (10 analyses) is An87-92. The bulk composition, determined by INAA and fused-bead EPMA applied to 2 chips totaling 650 mg, is uncommonly Ti-poor for a noncumulate eucrite, with bulk Mg/(Mg+Fe) ~ 40 mol%, 0.4 wt% TiO2, and 0.43 wt% Na2O.

Classification: Eucrite, unbrecciated.

Specimens: Main mass with Gessler, type specimen at UCLA.

Data from:
  Table 0
  Line 0:
Place of purchase:Tucson
Date:P Jan 2018
Mass (g):1822
Weathering grade:mild
Ferrosilite (mol%):58 (low-Ca), 25 (high-Ca)
Wollastonite (mol%):3 (low-Ca), 44 (high-Ca)
Classifier:P. Warren, UCLA
Type spec mass (g):28
Type spec location:UCLA
Main mass:Nick Gessler
Comments:Gessler's address: 2010 Calgary Lane, Los Angeles, CA 90077; submitted by Paul Warren
   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)
References: Published in Meteoritical Bulletin, no. 108 (2020) Meteorit. Planet. Sci. 55, 1146-1150
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     This is 1 of 8904 approved meteorites from (Northwest Africa) (plus 1871 unapproved names)

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