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Northwest Africa 13980
Basic information Name: Northwest Africa 13980
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13980
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 502 g
Classification
  history:
Recommended:  CK3    [explanation]

This is 1 of 68 approved meteorites classified as CK3.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CK chondrites, CK3 chondrites, and CV-CK clan chondrites
Comments: Approved 26 Dec 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 13980 (NWA 13980)

(Northwest Africa)

Purchased: 2021

Classification: Carbonaceous chondrite (CK3)

History: Purchased by Grant Harkness in 2021 from a Moroccan dealer.

Petrography: (A. Irving, UWS and J. Boesenberg, BrownU) Breccia composed of Type 3 clasts within a fine grained matrix (very similar to the matrix in the clasts). The clasts consist of separated, well-formed, unequilibrated Cr-magnetite-bearing chondrules (some with concentric rims, apparent diameter 1290 ± 640 µm, N = 25) plus some irregularly-shaped, fine-grained CAI set in a fine grained matrix containing stained Cr-magnetite, intermediate plagioclase, chromite and chlorapatite. Orthopyroxene is apparently absent but augite is quite abundant, and both devitrified glass and feldspar are present.

Geochemistry: Olivine (Fa16.7±14.2, range Fa1.1-32.8, N = 6), augite (Fs12.4±13.3Wo49.6±1.1, range Fs1.3-38.3Wo48.4-51.1, N = 6), Al-Ti-diopside in CAI (Fs0.7Wo54.2, Al2O3 8.7 wt.%, TiO2 1.1 wt.%), plagioclase (An21.7Or3.3; An29.9Or2.4; N = 2), magnetite (Cr2O3 2.5-4.2 wt.%, N = 6).

Classification: Carbonaceous chondrite (CK3).

Specimens: 26 g including one polished thin section is at PSF; remainder in the Harkness Collection.

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2021
Mass (g):502
Pieces:6
Class:CK3
Shock stage:S2
Weathering grade:low
Fayalite (mol%):16.7±14.2
Ferrosilite (mol%):12.4±13.3
Wollastonite (mol%):49.6±1.1
Classifier:A. Irving, UWS, and J. Boesenberg, BrownU
Type spec mass (g):26
Type spec location:PSF
Main mass:Harkness Collection
Comments:Work name HC-22; submitted by A. Irving
Institutions
   and collections
PSF: Planetary Studies Foundation,10 Winterwood Lane, Unit B, Galena, Illinois 61036-9283, United States; Website (institutional address; updated 1 Dec 2011)
UWS: University of Washington, Department of Earth and Space Sciences, 70 Johnson Hall, Seattle, WA 98195, United States (institutional address; updated 15 Jan 2012)
BrownU: Brown University Providence, RI 02912, United States (institutional address; updated 7 Sep 2019)
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 8402 approved meteorites from (Northwest Africa) (plus 1899 unapproved names)

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