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Northwest Africa 11552
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:help 109.2 g
Meteoritical Bulletin:  MB 107  (2018)  Eucrite
Recommended:  Eucrite    [explanation]

This is 1 of 606 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 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:
  Table 0
  Line 0:
Place of purchase:internet
Date:P 2016 Nov 16
Mass (g):109.2
Weathering grade:moderate
Ferrosilite (mol%):66.1±1.7
Wollastonite (mol%):4.9±0.3
Classifier:M. Hutson, A. Ruzicka, Cascadia
Type spec mass (g):21.5
Type spec location:Cascadia
Main mass:Bastian Baecker
Comments:Lab number CML0943; submitted by A. Ruzicka
   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)
References: Published in Meteoritical Bulletin, no. 107, MAPS 55, 460-462
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     This is 1 of 9806 approved meteorites from (Northwest Africa) (plus 1855 unapproved names)

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