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Northwest Africa 13261
Basic information Name: Northwest Africa 13261
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13261
Observed fall: No
Year found: 2019
Country: (Northwest Africa)
Mass:help 1185 g
Recommended:  CK5    [explanation]

This is 1 of 199 approved meteorites classified as CK5.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (equilibrated), CK chondrites, CK chondrites (type 4-6), and CV-CK clan chondrites
Comments: Approved 10 Oct 2020
Writeup from MB 109:

Northwest Africa 13261 (NWA 13261)

Northwest Africa

Purchased: 2019

Classification: Carbonaceous chondrite (CK5)

History: Purchased from a Moroccan meteorite dealer and hotelier in Agadir.

Physical characteristics: The single dense mass has a finely reticulated ash-hued outer surface sheathed in a desert varnish. Chondrules and CAIs protrude from the surface. The cut face reveals a greige matrix with numerous chondrules along with CAIs more than a centimeter in diameter and somewhat larger dark inclusions.

Petrography: (C. Agee, UNM) Microprobe examination shows texturally equilibrated, recrystallized chondrules and matrix, fine-grained Cr-magnetite is present throughout and abundant. No metal was observed.

Geochemistry: (C. Agee, UNM) Olivine Fa32.3±1.0, Fe/Mn=123±17, NiO=0.39±0.04(wt%), n=12; high-Ca pyroxene Fs8.2±1.1Wo49.5±0.8, Fe/Mn=77±2, n=2.

Classification: Carbonaceous chondrite (CK5)

Specimens: 21.9 g on deposit at UNM, DPitt holds the main mass.

Data from:
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2019
Mass (g):1185.4
Shock stage:low
Weathering grade:moderate
Fayalite (mol%):32.3±1.0
Ferrosilite (mol%):8.2±1.1
Wollastonite (mol%):49.5±0.8
Classifier:C. Agee, UNM
Type spec mass (g):21.9
Type spec location:UNM
Main mass:DPitt
Comments:Submitted by C. Agee
   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)
DPitt: Darryl Pitt, 225 West 83rd Street, New York, NY 10024, United States; Website (private address)
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
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     This is 1 of 8890 approved meteorites from (Northwest Africa) (plus 1871 unapproved names)

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