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Northwest Africa 13119
Basic information Name: Northwest Africa 13119
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13119
Observed fall: No
Year found: 2019
Country: Mauritania
Mass:help 7 kg
Recommended:  Lunar (Feldsp. Breccia)    [explanation]

This is 1 of 288 approved meteorites classified as Lunar (Feldsp. Breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 9 Feb 2020
Writeup from MB 109:

Northwest Africa 13119 (NWA 13119)


Purchased: 2019

Classification: Lunar meteorite (feldspathic breccia)

History: Purchased from a Mauritanian meteorite dealer by Edwin Thompson and Phillip Todd in August of 2019.

Physical characteristics: Three pieces that fit together. No fusion crust. Saw cuts reveal a fragmental breccia with numerous angular shaped, cm-sized, white feldspathic clasts set in a predominantly light gray groundmass. There are also a few scattered brown-green lithic clasts present.

Petrography: (C. Agee, UNM) SEM images show fragmental breccia of differing grain-size scales. The groundmass is extremely fine-grained with cataclastic domains, and a variety of micro-basaltic lithologies and single-phase fragments of olivine, pyroxene, and plagioclase. Ubiquitous shock melt veins and vesicles are present throughout.

Geochemistry: (C. Agee, UNM) Olivine Fa25.6±10.7, range Fa8.1-41.2, Fe/Mn=114±26, n=7; pigeonite Fs24.4±8.9Wo10.1±2.0, Fe/Mn=48±2, n=2; augite Fs16.8±1.0Wo31.7±10.1, Fe/Mn=58±8, n=3; plagioclase An95.4±0.8, n=4; shock melt (proxy for bulk composition) SiO2=45.0, TiO2=0.37, Al2O3=29.7, MgO=6.2, FeO=2.3, MnO=0.07, CaO=15.7, Na2O=0.45 (wt%).

Classification: Lunar, feldspathic breccia

Specimens: 28.7 g on deposit at UNM, Phillip Todd holds the main mass.

Data from:
  Table 0
  Line 0:
Place of purchase:Mauritania
Date:P 2019
Mass (g):7 kg
Class:Lunar (Feldsp. Breccia)
Shock stage:high
Weathering grade:moderate
Fayalite (mol%):25.6±10.7
Ferrosilite (mol%):24.4±8.9; 16.8±1.0
Wollastonite (mol%):10.1±2.0; 31.7±10.1
Classifier:C. Agee, UNM
Type spec mass (g):28.7
Type spec location:UNM
Main mass:Phillip Todd
Comments:Field name PT-1; submitted by C. Agee, UNM
   and collections
UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)
Thompson: Edwin Thompson, 5150 Dawn St., Lake Oswego, OR 97035, United States (private address)
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
Find references in NASA ADS:
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     This is 1 of 183 approved meteorites from Mauritania (plus 1 unapproved name) (plus 2 impact craters)

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