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Northwest Africa 10812
Basic information Name: Northwest Africa 10812
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10812
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass:help 126.5 g
Classification
  history:
Meteoritical Bulletin:  MB 105  (2016)  LL5
Recommended:  LL5    [explanation]

This is 1 of 3182 approved meteorites (plus 1 unapproved name) classified as LL5.   [show all]
Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 5 Aug 2016
Writeuphelp
Writeup from MB 105:

Northwest Africa 10812 (NWA 10812)

(Northwest Africa)

Purchased: 2016

Classification: Ordinary chondrite (LL5)

History: One stone weighing 126.5 g was found in Morocco in 2016. David Holden acquired the sample from a meteorite prospector in Erfoud 2016.

Physical characteristics: The stone is dark brown in color, has a flattened rectangular shape and is ~95% covered by a weathered fusion crust containing contraction cracks. The interior cut face shows a texture composed of a light-colored, football-shaped region surrounded by a darker brown weathered area. Weathered and unweathered flakes of FeNi and FeS are visible on the surface.

Petrography: Description and classification (A. Love, App): Sample displays distinct and indistinct chondrules with an average diameter of 687 μm (n=42), within a recrystallized matrix. Chondrule have turbid to devitirified mesostasis. Many chondrules are surrounded by rims of Fes and FeNi metal. Sample contains ~3 vol% FeNi metal grains.

Geochemistry: (A. Love, App) Olivine Fa26.9±0.5, N=6; low Ca pyroxene Fs23.6±0.3Wo1.7±0.1, N=6.

Classification: Ordinary chondrite (LL5, S4, W2)

Specimens: An endcut and 2 slices and several small fragments weighing 21.4 g, and a polished thin section are currently on deposit at App. David Holden has the remaining mass.

Data from:
  MB105
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2016
Mass (g):126.5
Pieces:1
Class:LL5
Shock stage:S4
Weathering grade:W2
Fayalite (mol%):26.9±0.5 (N=6)
Ferrosilite (mol%):23.6±0.3 (N=6)
Wollastonite (mol%):1.7±0.1
Classifier:A. Love, App
Type spec mass (g):21.4
Type spec location:App
Main mass:David Holden
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)
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 8559 approved meteorites from (Northwest Africa) (plus 1896 unapproved names)

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