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Northwest Africa 13632
Basic information Name: Northwest Africa 13632
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13632
Observed fall: No
Year found: 2019
Country: Morocco
Mass:help 2.83 kg
Classification
  history:
Recommended:  EH6    [explanation]

This is 1 of 8 approved meteorites classified as EH6.   [show all]
Search for other: EH chondrites, Enstatite chondrites, Enstatite chondrites (type 4-7), and Enstatite-rich meteorites
Comments: Approved 12 Dec 2020
Writeuphelp
Writeup from MB 109:

Northwest Africa 13632 (NWA 13632)

Morocco

Purchased: 2019 Dec

Classification: Enstatite chondrite (EH6)

History: The meteorite was purchased by Ziyao Wang from Smara Addi in Tarfaia, Laayoune, Morocco, Dec. 2019

Physical characteristics: The meteorite is weathered highly with some relict fusion crust. The surface color is gray-brown with rusty spots. The Fe-Ni metal and sulfides are visible in the cut.

Petrography: The meteorite shows a granular recrystallized texture composed of enstatite (~65 vol.%, 0.1-0.5 mm in size), plagioclase (15 vol.%, 0.1-0.3 mm in size) and ~20 vol.% opaque minerals (including ~8 vol% Si-bearing kamacite and ~5 vol.% sulfides and schreibersite), no olivine is found. There are a few relict chondrules found in the section. Its weathering is strong with much of the kamacite and sulfides altered to brown limonite.

Geochemistry: Enstatite: En97.91-98.46Fs0.27-1.16 Wo0.93-1.45 (n=12); Plagioclase: An13.62-14.93Or2.72-4.62 (n=12); Si-bearing kamacite: Fe=85.99-92.84 wt%, Ni=5.04-7.63 wt%, Si=2.53-3.36 wt% (n=16); Schreibersite: 67.13-72.48 wt% Fe, 12.48-14.88 wt% Ni, 9.53-14.36 wt% P, 0.16-0.22 wt% Si, 0.17-0.30 wt% Co (n=12); Troilite: 35.34-36.43 wt% S, 58.80-63.33 wt% Fe, 0.54-1.31 wt% Cr, 0.06-0.32 wt% Ti (n=10); Cr-bearing sulfides: 52.1-53.1 wt% Fe, 38.89-40.00 wt% S, 3.88-4.78 wt% Cr (n=10).

Classification: Enstatite chondrite (EH6)

Specimens: 72.9 g including one polished thin section are deposited in GUT 

Data from:
  MB109
  Table 0
  Line 0:
Place of purchase:Laayoune, Morocco
Date:P 2019 Dec
Mass (g):2828
Pieces:72.9
Class:EH6
Ferrosilite (mol%):0.27-1.16 (n=12)
Wollastonite (mol%):0.93-1.45
Classifier:L.F. Xie and H.Y. Chen, GUT
Type spec mass (g):72.9
Type spec location:GUT
Main mass:Ziyao Wang
Finder:Anonymous
Comments:Submitted by Bingkui Miao
Institutions
   and collections
GUT: College of Earth Sciences, Guilin University of Technology, 12 Jiangan Road, Guilin 541004, China (institutional address; updated 18 Oct 2012)
Catalogs:
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
Find references in NASA ADS:
Find references in Google Scholar:
Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Wang Ziyao      
Public domain photographs:
Bingkui         
Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 1625 approved meteorites from Morocco (plus 22 unapproved names) (plus 1 impact crater)

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