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Northwest Africa 14113
Basic information Name: Northwest Africa 14113
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14113
Observed fall: No
Year found: 2021
Country: Algeria
Mass:help 350 g
Classification
  history:
Recommended:  CM2    [explanation]

This is 1 of 612 approved meteorites classified as CM2.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 2), CM chondrites, and CM-CO clan chondrites
Comments: Approved 11 Nov 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 14113 (NWA 14113)

Algeria

Purchased: 2021

Classification: Carbonaceous chondrite (CM2)

History: Purchased from an Algerian meteorite dealer in March 2021. Reportedly found in Algeria in 2021.

Physical characteristics: Dark fusion-crusted exterior, broken surface reveals numerous small chondrules set in a dark gray matrix that makes up approximately 60% of this meteorite. Small CAIs are visible.

Petrography: (A. Ross and C. Agee, UNM) Microprobe and reflected light microscopy examination reveal a fine-grained matrix that gives low microprobe totals from the presence of hydrous phases. Apparent chondrule diameter 313±149 μm (n=14). Chromite, Ni-bearing troilite, pentlandite, calcite, diopside, and oxidized iron were detected.

Geochemistry: (A. Ross and C. Agee, UNM) Olivine Fa26.0±19.0, n=17; ferroan chondrule olivine Fa36.3±11.3, Fe/Mn=101±14, Cr2O3=0.36±0.15, n=12; low-Ca pyroxene Fs8.2±14.9Wo4.2±4.2, n=5; matrix (20 μm defocused microprobe beam) analytical totals of 76.9±1.3 wt% and FeO=31.5±5.6 wt%, n=3.

Classification: Carbonaceous chondrite (CM2). The low analytical totals in the matrix indicate the presence of hydrous phases.

Specimens: 20.1 g on deposit at UNM, Simon de Boer and Matthew Stream hold the main mass.

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Algeria
Date:P 2021
Mass (g):350
Pieces:1
Class:CM2
Shock stage:low
Weathering grade:low
Fayalite (mol%):26.0±19.0
Ferrosilite (mol%):8.2±14.9
Wollastonite (mol%):4.2±4.2
Classifier:C. Agee, UNM
Type spec mass (g):20.1
Type spec location:UNM
Main mass:Simon de Boer and Matthew Stream
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 Meteoritical Bulletin, no. 110, in preparation (2021)
Find references in NASA ADS:
Find references in Google Scholar:
Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Robert Smart   
Ryan Upchurch   
Geography:

Algeria
Coordinates:Unknown.

Statistics:
     This is 1 of 1213 approved meteorites from Algeria (plus 29 unapproved names) (plus 4 impact craters)

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