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Northwest Africa 10554
Basic information Name: Northwest Africa 10554
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10554
Observed fall: No
Year found: 2010
Country: (Northwest Africa)
Mass:help 286 g
Classification
  history:
Meteoritical Bulletin:  MB 105  (2016)  Eucrite
Recommended:  Eucrite    [explanation]

This is 1 of 515 approved meteorites (plus 1 unapproved name) classified as Eucrite.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 16 Mar 2016
Writeuphelp
Writeup from MB 105:

Northwest Africa 10554 (NWA 10554)

(Northwest Africa)

Find: 2010

Classification: HED achondrite (Eucrite)

History: purchased in 2010 by M. Morgan in Morocco

Physical characteristics: Physical: One piece covered by thin black fusion crust with signs of weathering

Petrography: (Y. Liu, JPL) Light-gray stone consists of subophitic assembly of fine-grained plagioclase and pyroxene. Large anhedral pyroxene and plagioclase grains are also present, forming locally porphyritic texture. Accessory phases include silica phase, troilite, ilmenite and chromite.

Geochemistry: Low-Ca pyroxene (Fs60-59Wo2-4, FeO/MnO=30-34) contains pigeonite lamellae (Fs25-29Wo45-40, FeO/MnO=31-34) or vise versa; Plagioclase (An90.7±1.2, n=20).

Classification: Eucrite

Specimens: 20.9 g at UCLA. The remainder is held by by MtMorgan.

Data from:
  MB105
  Table 0
  Line 0:
Place of purchase:Morocco
Date:2010
Mass (g):286
Pieces:1
Class:Eucrite
Shock stage:high
Weathering grade:moderate
Ferrosilite (mol%):60.4±0.9 (n =35); 27.0±1.9 (n =10)
Wollastonite (mol%):2.7±1.0 (n =35); 42.8±2.3 (n=10)
Classifier:Y. Liu, JPL
Type spec mass (g):20.9g
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
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 7912 approved meteorites from (Northwest Africa) (plus 1974 unapproved names)

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