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Northwest Africa 10515
Basic information Name: Northwest Africa 10515
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10515
Observed fall: No
Year found: 2015
Country: Morocco
Mass:help 557 g
Classification
  history:
Meteoritical Bulletin:  MB 105  (2016)  Eucrite-unbr
Recommended:  Eucrite-unbr    [explanation]

This is 1 of 127 approved meteorites classified as Eucrite-unbr.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 12 Feb 2016
Writeuphelp
Writeup from MB 105:

Northwest Africa 10515 (NWA 10515)

Morocco

Purchased: 2015 April

Classification: HED achondrite (Eucrite, unbrecciated)

History: Purchased by team eegooblago (Brahim Tahiri, Dustin Dickens and Sean Tutorow) from a dealer in Morocco in April 2015.

Physical characteristics: Beige in color. Medium-grained white plagioclase and brown pyroxene in the matrix, with areas with smaller mineral grain sizes.

Petrography: (S. Hutchinson, UWO) Plagioclase and pyroxene are the main mineral phases of the matrix. Chromite was also identified. Areas of 3-4 mm consist of finer-grained materials (~0.1 mm) relative to the rest of the sample (0.5-2 mm). These areas are also more silica-rich, composed primarily of plagioclase, pyroxene and silica polymorphs. The meteorite is unbrecciated.

Geochemistry: Mineral compositions and geochemistry: low-Ca pyroxene: Fs57.1±2.4Wo7.2±2.7 (Fs53.2-59.3Wo5.3-11.9, n=20, Fe/Mn=28.6-32.0); Ca-pyroxene: Fs29.8±0.4Wo40.7±0.3 (Fs29.5-30.2Wo40.4-41.0, n=20, Fe/Mn=28.8-31.8); calcic plagioclase: An89.3±1,4 (An86.8-90.1, n=20).

Classification: Eucrite, unbrecciated

Specimens: 25.4 g including a thin section and polished mount at UWO. Sean Tutorow holds the main mass.

Data from:
  MB105
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2015 April
Mass (g):556.7
Pieces:1
Class:Eucrite-unbr
Shock stage:medium
Weathering grade:low
Ferrosilite (mol%):57.1±2.4; 29.8±0.4
Wollastonite (mol%):7.2±2.7; 40.7±0.3
Classifier:S. Hutchinson, UWO
Type spec mass (g):25.4
Type spec location:UWO
Main mass:S. Tutorow
Finder:Unknown
Comments:G666; submitted by A. Bouvier, UWO
Institutions
   and collections		 UWO: University of Western Ontario, Department of Earth Sciences, BGS 1026, 1151 Richmond St. N, London, Ontario, Canada N6A 5B7, Canada (institutional address; updated 18 Jul 2015)
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:
Find references in Google Scholar:
Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Ziyao Wang   
Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1932 approved meteorites from Morocco (plus 27 unapproved names) (plus 1 impact crater)

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