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Northwest Africa 11046
Basic information Name: Northwest Africa 11046
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11046
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass:help 182.1 g
Meteoritical Bulletin:  MB 106  (2018)  Eucrite-melt breccia
Recommended:  Eucrite-melt breccia    [explanation]

This is 1 of 58 approved meteorites classified as Eucrite-melt breccia.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 7 Feb 2017
Writeup from MB 106:

Northwest Africa 11046 (NWA 11046)

(Northwest Africa)

Purchased: 2016

Classification: HED achondrite (Eucrite, melt breccia)

History: One stone weighing 182.1 g was found by a meteorite prospector in Morocco. Thomas Webb acquired the sample from a meteorite prospector in 2016.

Physical characteristics: Sample is an irregularly shaped fragment that contains a dark brown patina with circular depressions not resembling regmaglypts. The interior surface is dark green and displays a clastic texture composed of lithic and mineral fragments.

Petrography: (A. Love, App) Sample is a breccia composed of clasts of cumulate and basaltic eucrites and associated debris of mineral fragments hosted in a quenched melt matrix. Cumulate clasts show incomplete recrystallization textures composed of inverted host Opx with augite exsolution lamellae containing rims of very fine-grained polygonal subgrains of pigeonite. Basalt has a subophitic texture with zoned pigeonite cores with subcalcic augite rims. Accessory minerals are: Si polymorphs, chromite, ilmenite and rare zircon.

Geochemistry: (A. Love, App) Low-Ca pyroxene Fs62.0±2.8Wo3.4±1.2 (Fs57.1-65.8Wo1.6-5.2, FeO/MnO=31.5-32.4, N=13); Pigeonite host Fs57.2±5.5Wo11.5±5 (Fs48.1-71.4Wo5.6-22.5, Fe/Mn=28.4-35.6, N=14); high-Ca pyroxene exsolution lamellae Fs29.1±2.0Wo42.6±2.6 (Fs13.6-41.6Wo22.5-44.9, FeO/MnO=28.0-32.4, N=13); plagioclase An90.5±1.5Or0.5±0.2 (An87.2-92.1, N=5).

Classification: HED achondrite (eucrite, melt breccia)

Specimens: Webb holds the main mass. A polished thin section and 3 slices weighing 20.70 g are on deposit at App.

Data from:
  Table 0
  Line 0:
Place of purchase:Unknown
Date:P 2016
Mass (g):182.1
Class:Eucrite-melt breccia
Shock stage:moderate
Weathering grade:low
Ferrosilite (mol%):62.0±2.8; 57.2±5.5; 29.1±2.0
Wollastonite (mol%):3.4±1.2; 11.5±5.0; 42.6±2.6
Classifier:A. Love, App
Type spec mass (g):20.7
Type spec location:App
Main mass:TWebb
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)
TWebb: No contact information provided., United States (private address)
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 8402 approved meteorites from (Northwest Africa) (plus 1899 unapproved names)

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