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Northwest Africa 13747
Basic information Name: Northwest Africa 13747
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13747
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass:help 643 g
Classification
  history:
Recommended:  CK5    [explanation]

This is 1 of 192 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 20 Mar 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 13747 (NWA 13747)

(Northwest Africa)

Purchased: 2020 Jul

Classification: Carbonaceous chondrite (CK5)

History: Pieces of different weights were purchased from a meteorite collector by Aziz Zad in the city of Ouargla, southeast Algeria, in July 2020.

Physical characteristics: Single stone with dark-brown fusion crust.

Petrography: (D. Sheikh, FSU) Specimen is composed of few chondrules (850±100 µm, n=5) set in a fine-grained matrix containing predominant ferroan olivine, secondary recrystallized feldspar (30±10 µm), Cr-rich magnetite, pentlandite, and pyrrhotite.

Geochemistry: Olivine (Fa34.0±0.4, range Fa33.3-35.2, NiO wt%=0.6±0.1, n=42), High-Ca Pyroxene (Fs10.1±0.7Wo46.3±0.5, range Fs9.5-11.4Wo45.6-46.9, n=9), Magnetite (Cr2O3 wt%=6.1±0.6, n=4).

Classification: Carbonaceous chondrite (CK5). Based on texture and mineral compositions sample is a CK chondrite. Secondary recrystallized plagioclase size indicates petrologic type 5.

Specimens: 20.2 g at UCLA, main mass with Aziz Zad.

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Algeria
Date:P 2020 Jul
Mass (g):643
Pieces:1
Class:CK5
Shock stage:low
Weathering grade:low
Fayalite (mol%):34.0±0.4
Ferrosilite (mol%):10.1±0.7
Wollastonite (mol%):46.3±0.5
Classifier:D. Sheikh, FSU
Type spec mass (g):20.2
Type spec location:UCLA
Main mass:Aziz Zad
Finder:anonymous
Comments:Submitted by Daniel Sheikh
Institutions
   and collections		 UCLA: Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095-1567, United States (institutional address; updated 17 Oct 2011)
FSU: Department of Geological Sciences, Florida State University, Tallahassee FL 32306-4100, United States (institutional address; updated 16 Dec 2010)
Catalogs:
References: Published in Meteoritical Bulletin, no. 110, in preparation (2021)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8420 approved meteorites from (Northwest Africa) (plus 1900 unapproved names)

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