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Northwest Africa 11204
Basic information Name: Northwest Africa 11204
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 11204
Observed fall: No
Year found: 2016
Country: (Northwest Africa)
Mass:help 499 g
Meteoritical Bulletin:  MB 106  (2018)  LL4
Recommended:  LL4    [explanation]

This is 1 of 387 approved meteorites classified as LL4.   [show all]
Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 28 Mar 2017
Writeup from MB 106:

Northwest Africa 11204 (NWA 11204)

(Northwest Africa)

Purchased: March 2016

Classification: Ordinary chondrite (LL4)

History: Purchased by Brahim Tahiri in Morocco and sent to his partner Sean Tutorow for analysis.

Physical characteristics: Weathered, dark colored exterior; saw cut reveals dark-brown groundmass with scattered chondrules of variable size.

Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows a few well-formed chondrules, some porphyritic and also chondrule fragments. Many iron oxide weathering veins observed throughout.

Geochemistry: (C. Agee and B. Ha, UNM) Olivine Fa27.8±4.2, Fe/Mn=53±14, n=6; low-Ca pyroxene Fs22.7±1.5Wo1.9±0.5, Fe/Mn=33±3, n=7.

Classification: Ordinary chondrite LL4

Specimens: 20.81 g including a probe mount on deposit at UNM, Sean Tutorow holds the main mass.

Data from:
  Table 0
  Line 0:
Place of purchase:Northwest Africa
Date:P March 2016
Mass (g):498.81
Shock stage:S3
Weathering grade:W3
Fayalite (mol%):27.8±4.2
Ferrosilite (mol%):22.7±1.5
Wollastonite (mol%):1.9±0.5
Classifier:C. Agee, UNM
Type spec mass (g):20.81
Type spec location:UNM
Main mass:Sean Tutorow
Comments:Field name G685; submitted by C. Agee, UNM
   and collections
UNM: Institute of Meteoritics MSC03 2050 University of New Mexico Albuquerque NM 87131-1126 USA, United States; Website (institutional address; updated 12 Feb 2015)
References: Published in Gattacceca J., Bouvier A., Grossman J., Metzler K., and Uehara M. (2019) Meteoritical Bulletin, no. 106. Meteorit. Planet. Sci. 54 in press.
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     This is 1 of 8777 approved meteorites from (Northwest Africa) (plus 1879 unapproved names)

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