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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
Recommended:  CK3    [explanation]

This is 1 of 72 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
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:
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2020
Mass (g):1025
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
   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)
References: Published in Meteoritical Bulletin, no. 110, in preparation (2021)
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     This is 1 of 8674 approved meteorites from (Northwest Africa) (plus 1882 unapproved names)

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