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Northwest Africa 11709
Basic information Name: Northwest Africa 11709
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11709
Observed fall: No
Year found: 2016
Country: Morocco
Mass:help 180 g
Meteoritical Bulletin:  MB 107  (2018)  Eucrite
Recommended:  Eucrite    [explanation]

This is 1 of 569 approved meteorites (plus 1 unapproved name) classified as Eucrite.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 27 Mar 2018
Writeup from MB 107:

Northwest Africa 11709 (NWA 11709)


Purchased: June 2016

Classification: HED achondrite (Eucrite)

History: A fragmented stone consisting of many pieces totally weighing 180 g was found by an anonymous person in Western Sahara and purchased 2016 by Enzo Compagnucci.

Physical characteristics: Few fragments are partly covered by fusion crust.

Petrography: (V. Moggi Cecchi, G. Pratesi, S. Caporali, UniFi): The thin section reveals a brecciated texture consisting of lithic clasts in a fine grained matrix. Lithic clasts consists of exsolved orthopyroxene crystals with fine pigeonite exsolution lamellae, 4-8 μm in width, augite, calcic plagioclase, ilmenite, chromite, troilite and FeNi metal.

Geochemistry: (V. Moggi Cecchi, G. Pratesi, S. Caporali, UniFi) Eucritic clasts: orthopyroxene host (Fs36.6±1.1En60.2±1.3Wo3.3±0.2, FeO/MnO = 29.5?0.3, n=6); augite (Fs22.6±1.1En33.0±1.2Wo44.4±1.4; n=6; Fe/Mn=28.3±0.3); pigeonite exsolution lamellae in orthopyroxene (Fs52.6±1.2,En44.4±1.1Wo3.0±0.3; n=5; Fe/Mn = 31.2±0.3); Plagioclase An 91.7±1.3Or0.3±0.1, n=4;

Classification: Eucrite with medium degree of shock and medium degree of weathering.

Specimens: A total of 20.2 g specimen and one thin section is on deposit at MSN-Fi. Cavaglià owns the main mass, now weighing 160 g.

Data from:
  Table 0
  Line 0:
Place of purchase:Erfoud
Date:P June 2016
Mass (g):180
Shock stage:medium
Weathering grade:medium
Ferrosilite (mol%):36.6±1.1 (n=6); 22.6±1.1 (n=6); 52.6±1.2 (n=5)
Wollastonite (mol%):3.3±0.2; 44.4±1.4; 3.0±0.3;
Classifier:V. Moggi Cecchi, S. Caporali, G. Pratesi, UniFi
Type spec mass (g):20.2
Type spec location:MSN-FI
Main mass:Cavaglià
Comments:Submitted by Vanni Moggi Cecchi
   and collections
MSN-FI: Museo di Storia Naturale “La Specola”, Sez. Mineralogia – Sistema Museale dell'Università degli Studi di Firenze Via Giorgio La Pira, 4 – 50121 Firenze, Italy; Website (institutional address; updated 24 Oct 2022)
UniFi: Università degli Studi di Firenze, P.zza S. Marco, 4 - 50121 Firenze, Italy (institutional address; updated 14 Sep 2013)
References: Published in Meteoritical Bulletin, no. 107, MAPS 55, 460-462
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     This is 1 of 1929 approved meteorites from Morocco (plus 27 unapproved names) (plus 1 impact crater)

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