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Northwest Africa 14689
Basic information Name: Northwest Africa 14689
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14689
Observed fall: No
Year found: 2021
Country: Morocco
Mass:help 88 g
Classification
  history:
Recommended:  CK6    [explanation]

This is 1 of 77 approved meteorites classified as CK6.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (equilibrated), CK chondrites, CK chondrites (type 4-6), and CV-CK clan chondrites
Comments: Approved 21 Feb 2022
Writeuphelp
Writeup from MB 111:

Northwest Africa 14689 (NWA 14689)

Guelmim, Morocco

Purchased: 2021

Classification: Carbonaceous chondrite (CK6)

History: Steve Arnold purchased the 88 g sample from a dealer in Guelmim, Morocco, in 2021.

Physical characteristics: The sample is highly friable and broken fragments some of which show a wind-ablated, black fusion crusted exterior. The interior is dark gray colored and shows some isolated chondrules that protrude from the surface.

Petrography: Description and classification (A. Love, App) Sample has a chondritic texture composed of dispersed chondrules, fragments and magnetite set within a recrystallized matrix. Remaining droplet chondrules have an average apparent diameter of 636 μm, n=51. Additional minerals are: Cr-bearing magnetite, plagioclase with an avg. grainsize of 110µm, phosphates, pentlandite, ilmenite, pyrite (based on weight %) and chalcopyrite.

Geochemistry: (A. Love, App) Olivine (Fa29.4±0.4, Fe/Mn=84.5±3.5, n=12); aluminous low Ca pyroxene (Fs26.3±0.5Wo0.9±0.4, Al2O3=2.3±0.9, Fe/Mn=59.6±2.5, n=4); aluminous high Ca pyroxene (Fs15.3±1.5Wo40.7±6.9, Al2O3=1.8±0.7, n=5). Cr2O3 wt% in magnetite=2.5±0.2, n=10.

Classification: Carbonaceous chondrite (CK6, C-S3, wi-0). Based on chondrule diameters, equilibrated mineral compositions, avg. grain size of plagioclase, Cr-bearing magnetite, this sample is a CK6.

Specimens: Steve Arnold holds the main mass. 17.95 g of fragments and a polished thin section are on deposit at App.

Data from:
  MB111
  Table 0
  Line 0:
State/Prov/County:Guelmim
Place of purchase:Guelmim
Date:P 2021
Mass (g):88
Pieces:many
Class:CK6
Shock stage:C-S3
Weathering grade:wi-0
Fayalite (mol%):29.4±0.4
Ferrosilite (mol%):26.3±0.5; 15.3±1.5
Wollastonite (mol%):0.9±0.4; 40.7±6.9
Classifier:A. Love, App
Type spec mass (g):17.95
Type spec location:App
Main mass:Steve Arnold
Comments:Submitted by Anthony Love
Institutions
   and collections
App: Department of Geology, 572 Rivers St., Appalachian State University, Boone, NC 28608, United States (institutional address; updated 7 Mar 2013)
Catalogs:
References: Published in Meteoritical Bulletin, no. 111, in preparation (2022)
Find references in NASA ADS:
Find references in Google Scholar:
Geography:

Morocco
Coordinates:Unknown.

Statistics:
     This is 1 of 2 approved meteorites from Guelmim, Morocco
     This is 1 of 1902 approved meteorites from Morocco (plus 27 unapproved names) (plus 1 impact crater)

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