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Northwest Africa 2339
Basic information Name: Northwest Africa 2339
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 2339
Observed fall: No
Year found: 2004
Country: (Northwest Africa)
Mass:help 11.9 g
Classification
  history:
Meteoritical Bulletin:  MB 91  (2007)  Eucrite-mmict
Recommended:  Eucrite    [explanation]

This is 1 of 603 approved meteorites (plus 1 unapproved name) classified as Eucrite.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 28 Mar 2007
Writeuphelp
Writeup from MB 91:

Northwest Africa 2339

Northwest Africa

Find: May 2004

Achondrite (eucrite, monomict melt breccia)

History and physical characteristics: A. Spreeman purchased an 11.9 g fragment with little fusion crust from a Moroccan dealer in Zagora, Morocco, in 2004. This small stone was handed over to Rainer Bartoschewitz for investigation during the International Meteorite Fair in Gifhorn. Magnetic susceptibility: (Bart) log χ = 2.94 × 10−9 m3/kg.

Petrography: (R. Bartoschewitz, Bart) Breccia dominated by orthopyroxene fragments (<1 mm), some pigeonite with exsolution lamellae (<0.3 mm), small plagioclase fragments and accessory ilmenite, chromite, SiO2, and troilite in a fine-grained, mainly recrystallized melt matrix. Lithic fragments were not observed.

Mineral compositions and geochemistry: (R. Bartoschewitz, Bart; P. Appel and B. Mader, Kiel) Pigeonite (En28.5–58.4Wo18.0–5.6), hypersthene (Fs40.0–41.6Wo2.0–4.3), bytownite (An81–92Or<1), chromite (Al2O3 = 7.8, TiO2 = 6, no MgO), troilite (Co = 0.09) (all in wt%). Oxygen isotopes: (M. Kusakabe, OkaU) δ17O =1.65, δ18O =3.66 (both ‰).

Classification: Achondrite (eucrite, monomict melt breccia).

Type specimen: A total of 2.3 g of sample on deposit at MKBraun. Bart holds 2.3 g and one thin section, and Spreemann holds the main mass.

Data from:
  MB91
  Table 2
  Line 92:
Place of purchase:Zagora, Morocco
Date:2004
Mass (g):11.9
Pieces:1
Class:Euc
Ferrosilite (mol%):31.63
Wollastonite (mol%):40.0-41.6
Magnetic suscept.:2.94
Classifier:R. Bartoschewitz, Bart
Type spec mass (g):2.3
Type spec location:MKBraun
Main mass:Spreeman
Plots: O isotopes:  
Institutions
   and collections		 Kiel: Geologisches und Mineralogisches Museum, Institut für Geowissenschaften, Christian-Albrechts-Universität Kiel, Ludewig-Mayn-Str. 10, D-24118 Kiel, Germany, Germany (institutional address; updated 13 Sep 2013)
MKBraun: Mineralien-Kabinett, Mineralogisch-petrographisches Museum, Technische Universität Braunschweig, Bienroderweg 95, 38106 Braunschweig, Germany, Germany; Website (institutional address; updated 13 Sep 2013)
Bart: Bartoschewitz Meteorite Laboratory, Weiland 37, D-38518 Gifhorn, Germany; Website (private address; updated 30 Nov 2019)
OkaU: Institute for Study of the Earth's Interior, Okayama University, Misasa Tottori 682-0193, Japan (institutional address)
Spreemann: A. Spreemann, Wörthsee, Germany (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 91, MAPS 42, 413-466 (2007)
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9710 approved meteorites from (Northwest Africa) (plus 1853 unapproved names)
Also see:
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Revision
  history:
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