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Northwest Africa 10556
Basic information Name: Northwest Africa 10556
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 10556
Observed fall: No
Year found: 2009
Country: (Northwest Africa)
Mass:help 67.1 g
Classification
  history:
Meteoritical Bulletin:  MB 105  (2016)  H5
Recommended:  H5    [explanation]

This is 1 of 11505 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 22 Feb 2016
Writeuphelp
Writeup from MB 105:

Northwest Africa 10556 (NWA 10556)

(Northwest Africa)

Purchased: 2009

Classification: Ordinary chondrite (H5)

History: One stone weighing 67.1 g was found in Morocco in 2009. David Holden acquired the sample from a meteorite prospector in Erfoud, 2009.

Physical characteristics: The stone is dark brown in color and is oriented. The fusion-crusted face is roughly triangular in profile and the trailing edge, which contains a well-defined rollover lip, is flat. The stone is 75% covered by a weathered fusion crust that displays shallow regmaglypts and a well-defined rollover lip. The cut face of the interior of the stone is mottled dark brown and orange in color and displays small chondrules, chondrule fragments, dark clasts and abundant fresh flakes of metal.

Petrography: Description and classification (A. Love, App): Sample displays recrystallized chondritic texture crosscut by glassy, shock veins. Chondrules are defined and have an average diameter of 415 μm. Porphyritic chondrules have turbid to devitrified mesostasis

Geochemistry: (A. Love, App) Olivine Fa19.7±0.1, N=6; Low Ca pyroxene Fs17.8±0.2Wo1.6±0.4, N=6.

Classification: Based on textural relationships and mineral compositions, this is an H5, S3, W1 ordinary chondrite.

Specimens: An endcut and several slices weighing 15.0 g, and a polished thin section are currently on deposit at App.

Data from:
  MB105
  Table 0
  Line 0:
Date:P 2009
Mass (g):67.1
Pieces:1
Class:H5
Shock stage:S3
Weathering grade:W1
Fayalite (mol%):19.7±0.1 (N=6)
Ferrosilite (mol%):17.8±0.2 (N=6)
Wollastonite (mol%):1.6±0.5 (N=6)
Classifier:A. Love, App
Type spec mass (g):15.0
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 9627 approved meteorites from (Northwest Africa) (plus 1865 unapproved names)
Also see:
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Revision
  history:
  This lists important revisions made to data for this record.

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