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Northwest Africa 11552 | |||||||||||||||||||||||||||
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Basic information | Name: Northwest Africa 11552 This is an OFFICIAL meteorite name. Abbreviation: NWA 11552 Observed fall: No Year found: 2016 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 5 Jan 2018 | ||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 107:
Northwest Africa 11552 (NWA 11552) (Northwest Africa) Purchased: 2016 Nov 16 Classification: HED achondrite (Eucrite) History: Donated to Cascadia in February, 2017 by Dr. Baecker, who had purchased the sample as an unclassified NWA on eBay. Physical characteristics: Single oriented cone mostly covered by black fusion crust. Interior cut faces show clastic texture ranging from small fragments to sub-cm subophitic-textured clasts. Brownish rust spots visible. Petrography: Clastic texture in thin section, including mineral, lithic, and melt breccia clasts. Relatively abundant calcite veining Geochemistry: Most pyroxene analyses are mixtures of low- and high-Ca pyroxene. Low-Ca pyroxene Fs66.1±1.7Wo4.9±0.3 (N=6); augite Fs34.1±2.0Wo39.4±2.4 (N=9). Classification: Monomict, largely equilibrated, brecciated eucrite based on texture and mineral composition. Specimens: Cascadia holds 21.5 g, two polished thin sections, and potted butt. Main mass is held Dr. Bastian Baecker (Huntsville, AL) | ||||||||||||||||||||||||||
Data from: MB107 Table 0 Line 0: |
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Institutions and collections |
Cascadia: Cascadia Meteorite Laboratory, Portland State University, Department of Geology, Room 17 Cramer Hall, 1721 SW Broadway, Portland, OR 97201, United States; Website (institutional address; updated 28 Oct 2011) |
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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 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names) |