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Northwest Africa 6920 | |||||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 6920 This is an OFFICIAL meteorite name. Abbreviation: NWA 6920 Observed fall: No Year found: 2011 Country: (Northwest Africa) Mass: 1468 g | ||||||||||||||||||||||||||||
Classification history: |
This is 1 of 451 approved meteorites classified as Howardite. [show all] Search for other: Achondrites, HED achondrites, and Howardites | ||||||||||||||||||||||||||||
Comments: | Approved 29 Nov 2011 | ||||||||||||||||||||||||||||
Writeup |
Writeup from MB 100:
Northwest Africa 6920 (NWA 6920) Northwest Africa Purchased: Mar 2011 Classification: HED achondrite (Howardite) Petrography: Breccia containing distinctive yellowish diogenite clasts, and calcic plagioclase has been partly to totally converted by shock to maskelynite. Relatively coarse-grained basaltic eucrite clasts and related debris are subordinate to diogenite clasts (of several types ranging up to unusually ferroan orthopyroxene compositions) plus related debris. Accessory minerals include chromite, silica polymorph, ilmenite and troilite. This specimen appears to be paired with NWA 6709. Geochemistry: Diogenite orthopyroxene Fs38.4-38.9Wo2.9-2.3, Fs29.5Wo1.5, Fs22.6Wo1.1 (FeO/MnO=30-36), host orthopyroxene Fs47.6Wo2.1, FeO/MnO=30), augite exsolution lamellae Fs16.3-17.6Wo42.7-42.5, FeO/MnO=26-27. | ||||||||||||||||||||||||||||
Data from: MB100 Table 1 Line 1540: |
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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) Hmani: A. Hmani Moroccan Imports, 13 rue Jules Hardouin Mansart, 92600 Asnières, France (private address) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 100, MAPS 49, E1-E101 (2014)
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Photos: |
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Geography: |
Statistics: This is 1 of 9627 approved meteorites from (Northwest Africa) (plus 1865 unapproved names) | ||||||||||||||||||||||||||||
Crosslinks: |
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Revision history: |
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