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Northwest Africa 10813
Basic information Name: Northwest Africa 10813
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10813
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass:help 32.1 g
Classification
  history:
Meteoritical Bulletin:  MB 105  (2016)  H5
Recommended:  H5    [explanation]

This is 1 of 11567 approved meteorites (plus 23 unapproved names) classified as H5.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 24 Sep 2016
Writeuphelp
Writeup from MB 105:

Northwest Africa 10813 (NWA 10813)

Northwest Africa

Purchased: 2016

Classification: Ordinary chondrite (H5)

History: One stone weighing 32.1 g was found in Morocco in 2016. David Holden acquired the sample from a meteorite prospector in Erfoud 2016.

Physical characteristics: The stone is brown in color and irregular-ovoid shaped. The stone has a weathered patina covering about 40% of its exterior. The interior of the stone is mottled light brown-brown in color and displays numerous chondrules, fragments and fresh flakes of metal.

Petrography: Description and classification (A. Love, App): Sample displays well formed, distinct chondrules with an average diameter of 454 μm, within a crystalline matrix. Chondrule have turbid to devitirified mesostasis. Matrix materials are recrystallized but appear dark in some areas due to FeOH staining FeNi metal grains are abundant (~10 vol%).

Geochemistry: (A. Love, App) Olivine Fa20.9±0.3, N=6; low Ca pyroxene Fs18.9±0.2Wo1.7±0.2, N=6.

Classification: Ordinary chondrite (H5 S3 W2)

Specimens: An endcut and one slice weighing 7.44 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):32.1
Pieces:1
Class:H5
Shock stage:S3
Weathering grade:W2
Fayalite (mol%):20.9±0.3 (N=6)
Ferrosilite (mol%):18.9±0.2 (N=6)
Wollastonite (mol%):1.7±0.2
Classifier:A. Love, App
Type spec mass (g):7.4
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
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)
Also see:
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Revision
  history:
  This lists important revisions made to data for this record.

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