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Northwest Africa 13641
Basic information Name: Northwest Africa 13641
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13641
Observed fall: No
Year found: 2016
Country: Morocco
Mass:help 7.32 kg
Classification
  history:
Meteoritical Bulletin:  MB 110  (2022)  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 10 Jan 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 13641 (NWA 13641)

Morocco

Purchased: 2016

Classification: Ordinary chondrite (H5)

History: The sample was found in Northwest Africa prior to 2016. Thierry Simard purchased the sample in France.

Physical characteristics: Sample is dark brown on the exterior and has an irregular shape. A cut face shows a reddish-brown weathered interior with some visible chondrules and flecks of sulfide.

Petrography: Description and classification (A. Love, App) Sample shows recrystallized texture composed of discernable droplet chondrules and fragments with an average apparent diameter of 568 µm, (n=35) set within a recrystallized matrix. Additional minerals: chromite, albitic plagioclase (avg. grainsize 44 µm, n=40), troilite, high Ca pyroxene and apatite.

Geochemistry: (A. Love, App) Olivine (Fa18.4±0.5, Fe/Mn=35.1±1.5, n=16); low-Ca Pyroxene (Fs17.0±0.8Wo1.6±0.9, range Fs16.5-19.2Wo1.0-4.4, Fe/Mn=22.4±1.4, n=12).

Classification: Ordinary chondrite (H5, C-S2, W3). Based on equilibrated mineral compositions, diameter of relict chondrules and size of secondary feldspars, sample is an H5.

Specimens: Thierry Simard holds the main mass. An endcut, a slice weighing 29.87 g, a thin section and polished mount are on deposit at App.

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:France
Date:P 2016
Mass (g):7320
Pieces:1
Class:H5
Shock stage:C-S2
Weathering grade:W3
Fayalite (mol%):18.4±0.5
Ferrosilite (mol%):17.0±0.8
Wollastonite (mol%):1.6±0.9
Classifier:Anthony Love
Type spec mass (g):29.87
Type spec location:App
Main mass:Thierry Simard
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 Gattacceca J., McCubbin F.M., Grossman J., Bouvier A., Chabot N.L., D'Orazio M., Goodrich C., Greshake A., Gross J., Komatsu M., Miao B., and Schrader D. (2022) The Meteoritical Bulletin, No. 110. Meteorit. Planet. Sci. 1-4
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Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 2082 approved meteorites from Morocco (plus 31 unapproved names) (plus 1 impact crater)
Also see:
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Revision
  history:
  This lists important revisions made to data for this record.

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