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Northwest Africa 13877
Basic information Name: Northwest Africa 13877
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 13877
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass:help 1025 g
Classification
  history:
Recommended:  CK3    [explanation]

This is 1 of 75 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 17 Jul 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 13877 (NWA 13877)

(Northwest Africa)

Purchased: 2020

Classification: Carbonaceous chondrite (CK3)

History: Purchased by Matt Morgan from a Moroccan meteorite dealer, December 2020.

Physical characteristics: Single stone, dark weathered fusion crust on exterior. Saw cuts reveal numerous distinct chondrules set in a brown-green fine-grained matrix. Scattered CAIs are visible throughout.

Petrography: (C. Agee, UNM) This meteorite has primarily type-I porphyritic chondrules with forsteritic olivines and enstatitic pyroxenes. Most chondrules have glass or mesostasis, no feldspar was observed. Average apparent chondrule size 1200±600 µm (n=20). A single barred chondrule with fayalitic olivine was observed. Fine-grained matrix makes up about 60% of this meteorite. Ubiquitous chromium-bearing magnetite was detected in the chondrules as well as in the matrix. No metal was detected.

Geochemistry: (C. Agee, UNM) chondrule olivine Fa2.1±2.0, Fe/Mn=57±5 (range 8-147), Cr2O3= 0.21±0.08 (wt%), n=12; fayalitic olivine Fa54, Fe/Mn=101; chondrule enstatite Fs1.3±0.7Wo1.0±0.2, n=6; magnetite Cr2O3=1.5±0.6 wt%.

Classification: Carbonaceous chondrite CK3. CK based on the presence of chromium-bearing magnetite and absence of metal. Cr2O3 content in olivine suggests type within the range 3.0-3.2.

Specimens: 20.5 g including a probe mount on deposit at UNM, Matt Morgan holds the main mass.

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2020
Mass (g):1025
Pieces:1
Class:CK3
Shock stage:low
Weathering grade:moderate
Fayalite (mol%):2.1±2.0
Ferrosilite (mol%):1.3±0.7
Wollastonite (mol%):1.0±0.2
Classifier:C. Agee, UNM
Type spec mass (g):20.5
Type spec location:UNM
Main mass:Matt Morgan
Comments:Submitted by C. Agee
Institutions
   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)
Catalogs:
References: Published in Gattacceca J., McCubbin F.M., Grossman J., Bouvier A., Chabot N.L., D'Orazio M., Goodrich C., Greshake A., Gross J., Komatsu M., Miao B., and Schrader D. (2022) The Meteoritical Bulletin, No. 110. Meteorit. Planet. Sci. 1-4
Find references in NASA ADS:
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8904 approved meteorites from (Northwest Africa) (plus 1871 unapproved names)

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