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Northwest Africa 15032
Basic information Name: Northwest Africa 15032
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15032
Observed fall: No
Year found: 2022
Country: Algeria
Mass:help 3 kg
Recommended:  Mesosiderite    [explanation]

This is 1 of 263 approved meteorites classified as Mesosiderite.   [show all]
Search for other: Mesosiderites, Metal-rich meteorites
Comments: Approved 20 Jun 2022
Writeup from MB 111:

Northwest Africa 15032 (NWA 15032)


Purchased: 2022

Classification: Mesosiderite

History: Carlos Muñecas (Expometeoritos) purchased 3 kg of the samples from a meteorite dealer in Ouargla, Algeria, in May 2022.

Physical characteristics: The exterior of the type sample is brown and has an irregular shaped, cracked surface texture. The cut face shows the interior is composed of lithic and mineral clasts crosscut by abundant oxidized patches and veins.

Petrography: Description and classification (A. Love, App) Sample is composed of: ~60 vol% completely oxidized FeNi metal, associated veins of iron hydroxides, ~40 vol% recrystallized lithic clasts (w/ sutured grain boundaries) and brecciated anhedral, low-Ca pyroxene, plagioclase, and rare olivine. Within mineral and lithic clasts: some pyroxenes are zoned and exsolved; and olivine contains poorly-developed reaction coronas. Additional minerals are: merrillite, chromite, and irregular to lath shaped silica polymorphs.

Geochemistry: Olivine (Fa32.3±6.0, Fe/Mn=38.6±1.4, n=4); low Ca pyroxene (Fs31.8±3.3Wo3.4±0.8, Fe/Mn=23.9±1.9, n=22); pigeonite (Fs39.0-51.4Wo5.9-6.1, Fe/Mn=24.2-24.1, n=2); high Ca pyroxene (Fs20.6±4.3Wo40.4±0.7, n=4); plagioclase (An94.7±1.5Or0.1±0.1, n=11).

Classification: Mesosiderite. Based on the abundance of weathered metal, textures and compositions of silicates, this sample is a mesosiderite.

Specimens: Carlos Muñecas holds the 800 g main mass. A polished thin mount, an endcut and slice totaling 38.5 g are on deposit at App.

Data from:
  Table 0
  Line 0:
Place of purchase:Ouargla
Date:P 2022
Mass (g):3kg
Shock stage:low
Weathering grade:moderate
Fayalite (mol%):32.3±6.0
Ferrosilite (mol%):31.8±3.3; 20.6±4.3
Wollastonite (mol%):3.4±0.8; 40.4±0.7
Classifier:A. Love, App
Type spec mass (g):35.8
Type spec location:App
Main mass:Carlos Muñecas (Expometeoritos)
Comments:Submitted by Anthony Love
   and collections
App: Department of Geology, 572 Rivers St., Appalachian State University, Boone, NC 28608, United States (institutional address; updated 7 Mar 2013)
References: Published in Meteoritical Bulletin, no. 111, in preparation (2022)
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     This is 1 of 1315 approved meteorites from Algeria (plus 30 unapproved names) (plus 4 impact craters)

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