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Northwest Africa 11747 | |||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 11747 This is an OFFICIAL meteorite name. Abbreviation: NWA 11747 Observed fall: No Year found: 2011 Country: (Northwest Africa) Mass: ![]() | ||||||||||||||||||||||||
Classification history: |
This is 1 of 569 approved meteorites (plus 1 unapproved name) classified as Eucrite. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||||||
Comments: | Approved 19 Apr 2018 | ||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 107:
Northwest Africa 11747 (NWA 11747) (Northwest Africa) Purchased: 2011 Classification: HED achondrite (Eucrite) Petrography: Highly brecciated, fine-medium grained sample. Fine grained matrix is composed of fragmented pyroxene and feldspar with three cohesive, coarse grained subophitic/gabbroic clasts. Dark grey to black melt glass pockets, often containting small fragmented clasts of pyroxene, are focused in a darker region of the sample which constitutes approximately 40% of the thin section. Accessory phases include apatite, merrillite, zircon, ilmenite and rare baddeleyite. Geochemistry: Mineral compositions and geochemistry: Pyroxene yield bulk Fe/Mn ratios of 29.42 (N=46). Pyroxene (En45Fs46Wo8; N=43) with exsolved augite lamella (En35Fs23Wo42; N=3) occur throughout the sample. Feldspar composition averages An88 (N=25). Mineral chemistry measured by EMP. Classification: Eucrite (monomict breccia) | ||||||||||||||||||||||||
Data from: MB107 Table 0 Line 0: |
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Institutions and collections |
ROM: Royal Ontario Museum, 100 Queen's Park, Toronto, Ontario M5S 2C6, Canada (institutional address; updated 18 Oct 2011) DGregory: David Gregory, 230 First Avenue, Suite 108, St. Thomas, Ontario N5R 4P5, Canada (private address) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 107, MAPS 55, 460-462
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Geography: |
Statistics: This is 1 of 8904 approved meteorites from (Northwest Africa) (plus 1871 unapproved names) |