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Northwest Africa 10823
Basic information Name: Northwest Africa 10823
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10823
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass:help 202 g
Classification
  history:
Meteoritical Bulletin:  MB 105  (2016)  Lunar (feldsp. breccia)
Recommended:  Lunar (feldsp. breccia)    [explanation]

This is 1 of 201 approved meteorites classified as Lunar (feldsp. breccia).   [show all]
Search for other: Lunar meteorites
Comments: Approved 10 Oct 2016
Writeuphelp
Writeup from MB 105:

Northwest Africa 10823 (NWA 10823)

(Northwest Africa)

Purchased: 2016

Classification: Lunar meteorite (feldspathic breccia)

History: Reportedly found in Western Sahara. Purchased by Steve Arnold from a Moroccan meteorite dealer in 2016.

Physical characteristics: Two identical appearing stones, weathered exterior with no fusion crust. Saw cuts reveal a polymict, feldspathic breccia with numerous white feldspar clasts, many in the range 1-5 mm, set in a dark gray matrix. There are also scattered cm-sized feldspathic clasts present. Some dark-colored domains have only sparse, fine grained, feldspathic clasts.

Petrography: (C. Agee, UNM) This meteorite is a mixture of domains with fine-grained groundmasses of pyroxene+olivine+plagioclase+opaques. Large fragmental plagioclase grains were observed throughout, shock melt veins are also present.

Geochemistry: (C. Agee and M.Spilde, UNM) olivine Fa47.7±9.5, Fe/Mn=95±7, n=11; pigeonite Fs41.9±9.8Wo4.9±3.3, Fe/Mn=61±8, n=12; augite Fs24.9±14.2Wo37.5±6.8, Fe/Mn=61±13, n=10; plagioclase An95.8±0.6Ab4.0±0.6Or0.2±0.1, n=7.

Classification: Lunar (feldspathic breccia)

Specimens: 20.02 g including a probe mount on deposit at UNM, Steve Arnold holds the main mass.

Data from:
  MB105
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2016
Mass (g):202
Pieces:2
Class:Lunar (feldsp. breccia)
Shock stage:high
Weathering grade:moderate
Fayalite (mol%):47.7±9.5
Ferrosilite (mol%):41.9±9.8, 29.4±10.4
Wollastonite (mol%):4.9±3.3, 36.5±6.8
Classifier:C. Agee, UNM
Type spec mass (g):20.02
Type spec location:UNM
Main mass:Steve Arnold
Comments:Fieldname SA-17; submitted by C. Agee
Institutions
   and collections
UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 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:
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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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