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Northwest Africa 14250
Basic information Name: Northwest Africa 14250
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14250
Observed fall: No
Year found: 2018
Country: (Northwest Africa)
Mass:help 265 g
Classification
  history:
Recommended:  CR2    [explanation]

This is 1 of 181 approved meteorites classified as CR2.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 2), and CR chondrites
Comments: Approved 11 Nov 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 14250 (NWA 14250)

(Northwest Africa)

Purchased: 2018

Classification: Carbonaceous chondrite (CR2)

Physical characteristics: Cut face reveals large chondrules and metal blebs set in a dark matrix. Several multi-mm dark clasts are visible.

Petrography: (J. Gattacceca, CEREGE) Large chondrules, up to 4 mm in diameter (average apparent diameter 1590±860 µm, n=27) set in an abundant fine-grained, iron-rich matrix. Abundant metal is present in the form of blebs up to 1.2 mm in the matrix and in chondrules, as well as decorating chondrule rims. Sulfides are present in the matrix. Multi-mm xenolithic clasts of different carbonaceous chondrite material are present.

Geochemistry: Olivine Fa1.7±0.1 (n=4). Low-Ca pyroxene Fs3.5±2.1Wo1.2±0.8 (n=7). Kamacite Fe 93.2 wt%, Ni 4.8 wt% (n=3). Defocused EPMA of the matrix: analytical total 81.5±2.9, FeO 33.0±2.0 wt% (n=3).

Classification: Carbonaceous chondrites (CR2). CR group based on petrography and mineral chemistry. The low EPMA analytical total in the matrix indicate the presence of hydrous phases.

Specimens: Type specimen (20 g) at NHMD, 12 g at CEREGE, main mass with Martin Bizzarro

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2018
Mass (g):265
Pieces:1
Class:CR2
Weathering grade:low
Fayalite (mol%):1.7±0.1 (n=4)
Ferrosilite (mol%):5.5±2.1 (n=7)
Wollastonite (mol%):1.2±0.8
Magnetic suscept.:5.24
Classifier:J. Gattacceca, CEREGE
Type spec mass (g):20
Type spec location:NHMD
Main mass:Martin Bizzarro
Finder:anonymous
Comments:work name CM82; submitted by Jérôme Gattacceca
Institutions
   and collections
CEREGE: CEREGE BP 80 Avenue Philibert, Technopole de l'Arbois 13545 Aix-en-Provence Cedex 4 France, France (institutional address; updated 29 Oct 2018)
NHMD: Natural History Museum of Denmark, University of Copenhagen, Øster Voldgade 5-7, 1350 Copenhagen K, Denmark. , Denmark; Website (institutional address; updated 17 Aug 2012)
Catalogs:
References: Published in Meteoritical Bulletin, no. 110, in preparation (2021)
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Photos:
CreditPhotos
Public domain photographs:
Jerome Gattacceca   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8402 approved meteorites from (Northwest Africa) (plus 1899 unapproved names)

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