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Northwest Africa 10553
Basic information Name: Northwest Africa 10553
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10553
Observed fall: No
Year found: 2015
Country: (Northwest Africa)
Mass:help 250 g
Classification
  history:
Meteoritical Bulletin:  MB 105  (2016)  Eucrite-br
Recommended:  Eucrite-br    [explanation]

This is 1 of 179 approved meteorites classified as Eucrite-br.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 16 Mar 2016
Writeuphelp
Writeup from MB 105:

Northwest Africa 10553 (NWA 10553)

(Northwest Africa)

Find: 2010

Classification: HED achondrite (Eucrite, brecciated)

History: purchased in August 2015 by M. Morgan in Morocco

Physical characteristics: Physical: One piece with thin black fusion crust

Petrography: (Y. Liu, JPL) Dark-gray stone of brecciated pyroxene with exolution lamellae and large plagioclase (maskelynite) grains. Round inclusions up to 1 mm in the largest dimension consist of Fe-rich augite in silica glass. Accessory phases include silica phase, troilite, ilmenite and olivine.

Geochemistry: Olivine (Fa65.3, FeO/MnO=44), Low-Ca pyroxene (Fs51-55Wo2, FeO/MnO=32-34) contains low-Ca augite lamellae (Fs41.0Wo18.7, FeO/MnO=32); Plagioclase(An92.3 ±1.2, n =15).

Classification: Eucrite-br

Specimens: 20.3 g at UCLA. The remainder is held by MtMorgan.

Data from:
  MB105
  Table 0
  Line 0:
Place of purchase:Morocco
Date:2010
Mass (g):250
Pieces:1
Class:Eucrite-br
Shock stage:low
Weathering grade:moderate
Fayalite (mol%):65.3 (n=1)
Ferrosilite (mol%):51.6 ±1.1 (n =14), 41.0 (n = 1)
Wollastonite (mol%):2.1 ±0.5 (n =14), 18.7 (n=1)
Classifier:Y. Liu, JPL
Type spec mass (g):20.3
Type spec location:UCLA
Main mass:MtMorgan
Comments:Submitted by Yang Liu
Institutions
   and collections
UCLA: Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095-1567, United States (institutional address; updated 17 Oct 2011)
MtMorgan: Matt Morgan, Mile High Meteorites, P.O. Box 151293, Lakewood, CO 80215-9293, United States; Website (private address)
Catalogs:
References: Published in Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7385 approved meteorites from (Northwest Africa) (plus 1955 unapproved names)

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