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Northwest Africa 2425
Basic information Name: Northwest Africa 2425
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 2425
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass:help 810 g
Meteoritical Bulletin:  MB 107  (2018)  lunar (feldsp. breccia)
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 340 approved meteorites classified as Lunar (feldsp. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 11 May 2018
Writeup from MB 107:

Northwest Africa 2425 (NWA 2425)

(Northwest Africa)

Purchased: 2016

Classification: Lunar meteorite (feldspathic breccia)

Physical characteristics: Weathered, red caliche stain, dull, no fusion crust, etched by ventifaction. Cut appearance: near-black matrix with gray clasts.

Petrography: (P. Warren, UCLA) The rock is a thoroughly polymict lunar highland breccia, mostly plagioclase, with clasts up to 10 mm but dominated by extremely fine-grained chaotic impact debris. A search for regolithic glass spheroids found only one, 0.2 mm, very round and undevitrified.

Geochemistry: Mineral compositions and geochemistry: Plagioclase: An95.9+/-1.3 (N=19). Low-Ca pyroxene: Fs33±8Wo4.3±0.9 (N=11), high-Ca pyroxene: Fs17±4Wo40±2 (N=7). Pyroxene FeO/MnO (wt.) averages 55±8 (N=24). Bulk composition results from INAA and fused-bead EPMA include Al2O3 = 27.1 wt%, Mg# = 73 mol%, Th = 0.13 ppm. The glass spheroid is similarly anorthositic (26 wt% Al2O3).

Classification: The meteorite is a lunar highland polymict breccia.

Data from:
  Table 0
  Line 0:
Place of purchase:Tucson
Date:P 2016
Mass (g):810
Class:lunar (feldsp. breccia)
Shock stage:moderate
Weathering grade:moderate
Fayalite (mol%):28±5 (N=13)
Ferrosilite (mol%):29±11 (N=24)
Wollastonite (mol%):16±16
Classifier:P. Warren, UCLA
Type spec mass (g):21.2
Type spec location:UCLA
Main mass:N. Gessler
Comments:Gessler's address: 2010 Calgary Ln, Los Angeles, CA 90077, USA; 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. 107, MAPS 55, 460-462
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     This is 1 of 9710 approved meteorites from (Northwest Africa) (plus 1853 unapproved names)

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