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Northwest Africa 11319
Basic information Name: Northwest Africa 11319
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11319
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass:help 74 g
Classification
  history:
Meteoritical Bulletin:  MB 106  (2018)  Eucrite-pmict
Recommended:  Eucrite-pmict    [explanation]

This is 1 of 408 approved meteorites classified as Eucrite-pmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 14 Jul 2017
Writeuphelp
Writeup from MB 106:

Northwest Africa 11319 (NWA 11319)

Morocco, (Northwest Africa)

Purchased: Mar 2016

Classification: HED achondrite (Eucrite, polymict)

History: A single stone of 74 g was found by an anonymous finder in Western Sahara and purchased 2016 in Erfoud by Hichame Mimaghador

Physical characteristics: The main mass is partly covered by a black fusion crust.

Petrography: The thin section analyzed displays a fragmental breccia composed of lithic eucrite clasts and angular mineral grains in a finer grained matrix. Mineral grains account for 10% of the total volume and are mainly consisting of unexsolved diogenitic orthopyroxene crystals 70-150 μm in width. Eucrite clasts are consisting of exsolved orthopyroxene crystals with fine pigeonite exsolution lamellae, 4-6 μm in width, calcic plagioclase, ilmenite, chromite, troilite and FeNi metal.

Geochemistry: EMP (V.Moggi Cecchi, G.Pratesi, S.Caporali UniFi) Diogenitic portion: orthopyroxene (Fs26.2±1.2En71.2±1.5Wo2.7±0.3; n=7; Fe/Mn=34.1±0.3); Eucritic portion: orthopyroxene host (Fs59.4±1.2En37.4±1.5Wo3.2±0.3, FeO/MnO = 32.3±0.3, N = 3); augite (Fs28.7±1.1En30.7±1.2Wo40.7±0.1; n=6; Fe/Mn=33.3±0.2); pigeonite exsolution lamellae in orthopyroxene (Fs60.7±1.2,En33.8±1.3Wo5.5±0.2; n=6; Fe/Mn = 36.4±0.1); Plagioclase An 84.5±1.5Or0.7±0.1, n=7.

Classification: Polymict eucrite with medium degree of shock and medium degree of weathering.

Specimens: A total of 18 g specimen and one thin section are on deposit at MSN-FI. Compagnucci owns the main mass.

Data from:
  MB106
  Table 0
  Line 0:
State/Prov/County:Morocco
Place of purchase:Erfoud
Date:P Mar 2016
Mass (g):74
Pieces:1
Class:Eucrite-pmict
Shock stage:medium
Weathering grade:medium
Classifier:V. Moggi Cecchi, S. Caporali, G. Pratesi, MSN-FI
Type spec mass (g):18
Type spec location:MSN-FI
Main mass:Mimaghador
Comments:Submitted by Vanni Moggi Cecchi
Institutions
   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)
Catalogs:
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.
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 25 approved meteorites from Morocco, (Northwest Africa)
     This is 1 of 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)
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Revision
  history:
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