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Northwest Africa 10814
Basic information Name: Northwest Africa 10814
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10814
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass:help 148.8 g
Classification
  history:
Meteoritical Bulletin:  MB 105  (2016)  Eucrite-pmict
Recommended:  Eucrite-pmict    [explanation]

This is 1 of 344 approved meteorites classified as Eucrite-pmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Comments: Approved 24 Sep 2016
Writeuphelp
Writeup from MB 105:

Northwest Africa 10814 (NWA 10814)

Northwest Africa

Purchased: 2016

Classification: HED achondrite (Eucrite, polymict)

History: One stone weighing 148.8 g was found near Jrifia and subsequently purchased from the finder in Temara in 2015. Don Cline and John Sinclair acquired the samples from a meteorite prospector at the Tucson Gem and Mineral Show in February of 2016.

Physical characteristics: The fragment is irregularly shaped and 35% of its surface is covered in a black fusion crust. The fusion crust contains contraction cracks and a few small areas with relict flow lines. The exterior surface is light orangish-gray and displays a clastic texture composed of lithic and mineral fragments. One side is lightly coated in caliche.

Petrography: Description and classification (A. Love, App): Sample is a breccia composed of ≤4 mm rounded to angular clasts with many different basaltic and cumulate textures and mineral fragements set within a fine-grained matrix of fragmental debris. At least one basaltic clast appears to be recrystallized. Minerals: pigeonite with augite exsolution lamellae, augite with pigeonite exsolution lamellae, normally zoned Ca-poor orthopyroxene, Si polymorph, ilmenite, chrome spinel, plagioclase. Sample contains ~5 vol% diogenite as individual mineral grains and fragments.

Geochemistry: (A. Love, App) Low-Ca pyroxene Fs52.9±3.4 Wo3.4±1.4 (Fs38.4-62.7Wo1.3-5.0, FeO/MnO=31.6-38.2, N=22); pigeonite host Fs50.2±5.1Wo10.1±3.1 (Fs41.9-59.2Wo6.1-16.8, Fe/Mn=30.7-33.3, N=28); high-Ca pyroxene exsolution lamellae Fs27.9±9.1Wo37.1±7.5 (Fs13.6-41.6Wo22.5-44.9, FeO/MnO=21.9-35.1, N=12); plagioclase An84.0±6.5Or0.8±0.6 (An73.4-92.6, N=20); diogenitic orthopyroxene Fs27.5±3.1Wo3.8±0.8 (Fs24.0-33.0Wo2.2-5.5, FeO/MnO=28.5-37.0, N=12).

Classification: Achondrite (Eucrite, polymict)

Specimens: PARI holds the 123.3 g main mass. A 21.1g type specimen and one polished thin section are on deposit at App.

Data from:
  MB105
  Table 0
  Line 0:
Place of purchase:Tuscon Gem and Mineral Show
Date:P 2016
Mass (g):148.8
Pieces:1
Class:Eucrite-pmict
Shock stage:moderate
Weathering grade:moderate
Ferrosilite (mol%):38.4-41.6; 41.9-59.2; 13.6-41.6; 24.0-33.0
Wollastonite (mol%):1.3-5.0; 6.1-16.8; 22.5-44.9; 2.2-5.5
Classifier:Anthony Love
Type spec mass (g):21.1
Type spec location:App
Main mass:PARI
Finder:Anonymous
Comments:Submitted by Anthony Love
Institutions
   and collections
App: Department of Geology, 572 Rivers St., Appalachian State University, Boone, NC 28608, United States (institutional address; updated 7 Mar 2013)
PARI: Pisgah Astronomical Research Institute 1 Pari Dr Rosman, NC 28772, United States (institutional address; updated 13 Sep 2016)
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 7101 approved meteorites from (Northwest Africa) (plus 2004 unapproved names)

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