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Northwest Africa 11107
Basic information Name: Northwest Africa 11107
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11107
Observed fall: No
Year found: 2015
Country: (Northwest Africa)
Mass:help 2.56 kg
Meteoritical Bulletin:  MB 106  (2018)  Eucrite-melt breccia
Recommended:  Eucrite-melt breccia    [explanation]

This is 1 of 57 approved meteorites classified as Eucrite-melt breccia.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 17 Feb 2017
Writeup from MB 106:

Northwest Africa 11107 (NWA 11107)

(Northwest Africa)

Purchased: 2015

Classification: HED achondrite (Eucrite, melt breccia)

History: Purchased by Larry Atkins from Morocco in June 2015.

Physical characteristics: Single stone, partial weathered fusion crust. A saw cut reveals breccia with basaltic clasts up to 2 cm bounded by dark shock melt veins, some of which are up to 7 mm wide.

Petrography: (C. Agee, UNM) This meteorite is a fragmental breccia of pyroxene grains, basaltic clasts and a few feldspar grains. Shock melt is present throughout, some parts with vesicles. Many pyroxenes show exsolution lamellae. Accessory troilite and ilmenite were observed.

Geochemistry: (C. Agee and B. Ha, UNM) low Ca pyroxene Fs60.8±1.5Wo3.9±1.2, Fe/Mn=31±1, n=8; high Ca pyroxene Fs42.2±13.2Wo28.6±17.5, Fe/Mn=31±2, n=4; plagioclase An89.3±1.1Ab10.3±1.2Or0.4±0.1, n=7.

Classification: Monomict eucrite melt breccia with a single population of pyroxene compositions.

Specimens: 48.8 g including a probe mount on deposit at UNM, Larry Atkins holds the main mass.

Data from:
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2015
Mass (g):2557
Class:Eucrite-melt breccia
Shock stage:high
Weathering grade:moderate
Ferrosilite (mol%):60.8±1.5; 42.2±13.2
Wollastonite (mol%):3.9±1.2; 28.6±17.5
Classifier:C. Agee, UNM
Type spec mass (g):48.8
Type spec location:UNM
Main mass:Larry Atkins
Comments:Field name LA-2; submitted by C. Agee
   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)
References: Published in Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.
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     This is 1 of 8138 approved meteorites from (Northwest Africa) (plus 1941 unapproved names)

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