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Northwest Africa 11410 | |||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 11410 This is an OFFICIAL meteorite name. Abbreviation: NWA 11410 Observed fall: No Year found: 2013 Country: Morocco Mass: 467 g | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 660 approved meteorites classified as Ureilite. [show all] Search for other: Achondrites, Ureilites | ||||||||||||||||||||||||||||
Comments: | Approved 24 Sep 2017 | ||||||||||||||||||||||||||||
Writeup |
Writeup from MB 106:
Northwest Africa 11410 (NWA 11410) Morocco Purchased: February 2013 Classification: Ureilite History: Purchased from Moroccan meteorite dealer in 2013. Physical characteristics: Physical Characteristics: Single large stone, black irregular surface with remnant fusion crust. Saw cut shows dark mosaicized interior with dark green and smaller white grains. Stone was extremely difficult to cut. Petrography: (K. Domanik and F. Stephan, UAz) Microprobe examination of a polished mount shows approx. 80% olivine and 15% pyroxene. The average grain size of both olivine and pyroxene is approx. 1-2 mm. Fe-Ni veins, now mostly oxidized by desert weathering, occupy grain boundaries and also crosscut some grains. The veins contain irregularly shaped patches of graphite, partially altered to diamond, 200-1000 μm in length. In rare cases olivine grain boundaries in contact with larger metal veins or with graphite display a thin, reduced rim, 2-10 μm wide, containing scattered, tiny metal blebs. Pyroxene consists of a patchy, mottled mixture of pigeonite and low-Ca pyroxene containing abundant void spaces, scattered Fe-metal blebs, and small Si-rich inclusions. Geochemistry: Mineral compositions and geochemistry: (K. Domanik and F. Stephan, UAz) Olivine cores Fa20.9±1.6, Fe/Mn=44.3±4.4, Cr2O3=0.66±0.07 wt%, n=17; olivine rims Fa3.6±1.4, Fe/Mn=8.6±4.6, Cr2O3=0.57±0.10 wt%, n=8; pigeonite Fs16.4±0.4Wo9.6±1.0, Fe/Mn=24.7±1.9, Cr2O3=1.22±0.07 wt%, n=12; low-Ca pyroxene Fs14.2±0.6Wo2.9±0.4, Fe/Mn=26.7±3.4, Cr2O3=1.01±0.04 wt%, n=14. Classification: Achondrite (ureilite) Specimens: 20.2 g plus two probe mounts on deposit at UAz, Fredric Stephan holds the main mass. | ||||||||||||||||||||||||||||
Data from: MB106 Table 0 Line 0: |
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Institutions and collections |
UAz: Lunar and Planetary Laboratory, University of Arizona, 1629 E. University Blvd., Tucson, AZ 85721, United States (institutional address; updated 14 Jan 2012) |
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Catalogs: |
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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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Geography: |
Statistics: This is 1 of 2082 approved meteorites from Morocco (plus 31 unapproved names) (plus 1 impact crater) | ||||||||||||||||||||||||||||
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Revision history: |
This lists important revisions made to data for this record.
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