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Northwest Africa 11550
Basic information Name: Northwest Africa 11550
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11550
Observed fall: No
Year found: 2017
Country: (Northwest Africa)
Mass:help 159.4 g
Classification
  history:
Meteoritical Bulletin:  MB 107  (2018)  Eucrite
Recommended:  Eucrite    [explanation]

This is 1 of 616 approved meteorites (plus 1 unapproved name) classified as Eucrite.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 5 Jan 2018
Writeuphelp
Writeup from MB 107:

Northwest Africa 11550 (NWA 11550)

(Northwest Africa)

Purchased: 2017 Jan 29

Classification: HED achondrite (Eucrite)

History: Purchased NWA stone at the Tucson Gem show from Sidi Mohamad Ismaily

Physical characteristics: Exterior surfaces partly covered by black fusion crust; non-crusted surfaces are gray with portions covered by pinkish dust.

Petrography: In thin section dominated by many small mineral clasts, and some lithic clasts

Geochemistry: Low-Ca pyroxene Fs60.0±1.7Wo2.1±0.8 (N=47).

Classification: Monomict, largely equilibrated, brecciated eucrite based on texture and mineral composition.

Specimens: Cascadia holds the entire sample, consisting of 157.8 g, a polished thin section, and potted butt.

Data from:
  MB107
  Table 0
  Line 0:
Place of purchase:Tucson
Date:P 2017 Jan 29
Mass (g):159.4
Pieces:1
Class:Eucrite
Weathering grade:minor
Ferrosilite (mol%):60.0±1.7
Wollastonite (mol%):2.1±0.8
Classifier:M. Hutson, A. Ruzicka, Cascadia
Type spec mass (g):157.8
Type spec location:Cascadia
Main mass:Cascadia
Comments:Lab number CML0920; submitted by A. Ruzicka
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)
Catalogs:
References: Published in Meteoritical Bulletin, no. 107, MAPS 55, 460-462
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9933 approved meteorites from (Northwest Africa) (plus 1837 unapproved names)

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