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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:
Recommended:  H5    [explanation]

This is 1 of 10909 approved meteorites (plus 20 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 Meteoritical Bulletin, no. 110, in preparation (2021)
Find references in NASA ADS:
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Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1887 approved meteorites from Morocco (plus 26 unapproved names) (plus 1 impact crater)

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