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Northwest Africa 11247 | |||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 11247 This is an OFFICIAL meteorite name. Abbreviation: NWA 11247 Observed fall: No Year found: 2017 Country: (Northwest Africa) Mass: ![]() | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 119 approved meteorites classified as Eucrite-unbr. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||||||
Comments: | Approved 9 Jun 2017 | ||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 106:
Northwest Africa 11247 (NWA 11247) (Northwest Africa) Purchased: 2017 Jan Classification: HED achondrite (Eucrite, unbrecciated) History: Purchased by Eric Twelker in January 2017 from a Moroccan dealer at the Tucson Gem and Mineral Show. Petrography: (A. Irving and S. Kuehner, UWS) Medium grained (average 0.5 mm) with equigranular texture, and composed predominantly of exsolved pigeonite and calcic plagioclase with accessory silica polymorph, ilmenite (with rutile exsolution lamellae), chromite and stained Ni-free metal. Geochemistry: Orthopyroxene host (Fs60.0-60.3Wo1.9-1.8, FeO/MnO = 30, N = 3), clinopyroxene exsolution lamellae (Fs26.8-27.8Wo42.1-40.7, FeO/MnO = 29-33, N =3), plagioclase (An89.3-90.3Or0.0-0.6, N = 3). Classification: Eucrite (unbrecciated, microgabbroic). Specimens: 22.5 g plus one polished thin section at UWB; remainder with Mr. E. Twelker. | ||||||||||||||||||||||||||||
Data from: MB106 Table 0 Line 0: |
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Institutions and collections |
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012) UWB: University of Washington, Box 353010 Seattle, WA 98195, United States (institutional address; updated 27 Jul 2012) Twelker: Eric Twelker, P.O. Box 844, Port Townsend, WA 98368, United States; Website (private address; updated 1 Dec 2014) |
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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 8559 approved meteorites from (Northwest Africa) (plus 1896 unapproved names) |