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Northwest Africa 13376
Basic information Name: Northwest Africa 13376
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13376
Observed fall: No
Year found: 2018
Country: Morocco
Mass:help 7 kg
Recommended:  LL3    [explanation]

This is 1 of 422 approved meteorites classified as LL3.   [show all]
Search for other: LL chondrites, LL chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Comments: Approved 2 Aug 2020
Writeup from MB 109:

Northwest Africa 13376 (NWA 13376)


Find: 2018

Classification: Ordinary chondrite (LL3)

History: Collected by a nomad in an undetermined location in southern Morocco in the fall of 2018. Purchased by Geologist Juan Avilés Poblador in Spring 2019 on behalf of the UAlic (Earth Sciences Department, Laboratory of Applied Petrology)

Physical characteristics: The stone is broken into three pieces totaling 7 kg. Chondrules are visible through the dark brown to reddish exterior.

Petrography: (C. Herd and H. Shek, UAb) Optical and microprobe examination of a polished thin section shows well-defined chondrules in a clastic matrix. Several large and numerous small iron oxide veinlets are present throughout, and metal has been strongly oxidized. Shock effects include weak mosaicism and planar fractures in olivine.

Geochemistry: (C. Herd and H. Shek, UAb) Data obtained by EMP examination of carbon-coated thin section: Olivine Fa23.0±10.9, Cr2O3 = 0.07±0.09 (n=62); Low-Ca Pyroxene Fs11.5±7.2Wo0.8±0.6 (n=69).

Classification: Ordinary chondrite, LL3. Estimated subtype 3.4. based on standard deviation of olivine and low-Ca pyroxene analyses, and presence of chondrule glass.

Specimens: Type specimen of 51.8 g, including one thin section, is at UAb. Main mass at UAlic.

Data from:
  Table 0
  Line 0:
Mass (g):7000
Shock stage:S4
Weathering grade:W3.0
Fayalite (mol%):23.0±10.9 (n=62)
Ferrosilite (mol%):11.5±7.2 (n=69)
Wollastonite (mol%):0.8±0.6 (n=69)
Classifier:C. Herd, UAb
Type spec mass (g):51.8
Type spec location:UAb
Main mass:UAlic
Comments:Field number 15A; submitted by C. Herd
   and collections
UAb: 1-26 Earth Sciences Building, University of Alberta, Edmonton, AB, T6G 2E3, Canada, Canada; Website (institutional address; updated 17 Oct 2011)
UAlic: Earth Sciences Department University of Alicante San Vicente del Raspeig, Spain (institutional address; updated 9 Feb 2020)
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
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     This is 1 of 1887 approved meteorites from Morocco (plus 26 unapproved names) (plus 1 impact crater)

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