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Northwest Africa 2339 | |||||||||||||||||||||||||
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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: ![]() | ||||||||||||||||||||||||
Classification history: |
This is 1 of 588 approved meteorites (plus 1 unapproved name) classified as Eucrite. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||
Comments: | Approved 28 Mar 2007 | ||||||||||||||||||||||||
Writeup![]() |
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: |
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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) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 91, MAPS 42, 413-466 (2007)
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Geography: |
Statistics: This is 1 of 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names) |