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Northwest Africa 14499
Basic information Name: Northwest Africa 14499
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14499
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 243 g
Classification
  history:
Recommended:  CR2    [explanation]

This is 1 of 184 approved meteorites classified as CR2.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 2), and CR chondrites
Comments: Approved 19 Mar 2022
Writeuphelp
Writeup from MB 111:

Northwest Africa 14499 (NWA 14499)

(Northwest Africa)

Purchased: 2021 Mar

Classification: Carbonaceous chondrite (CR2)

Physical characteristics: Cut face reveals a brown interior, with large chondrules, and a few mm-sized metal blebs.

Petrography: (T. Prestgard, IPAG; J. Gattacceca, CEREGE) Chondrite with large chondrules (average apparent diameter 1055±415 µm, n= 30), often decorated by metal blebs. Metal is also present as large individual grains, some up to ~1 mm, and as smaller (<50 µm) grains inside chondrules and in the matrix. The matrix is fine-grained, with an abundance of 44% from point counting (n=527). Rare sulfides are observed in the matrix. Terrestrial weathering is strong. IR spectra of the matrix (T. Prestgard, IPAG) show the presence of hydrated silicates, notably phyllosilicates. The intensity of aqueous alteration is likely lower than that of Renazzo, based on IR spectra of bulk and matrix material.

Geochemistry: Olivine Fa1.6±0.5 (n=5). Low-Ca pyroxene Fs2.4Wo0.7 (n=1). Defocused matrix FeO33.1 wt%, analytical total 82.1 wt%.

Classification: Carbonaceous chondite (CR2).

Specimens: Type specimen at CEREGE. Main mass with Kuntz.

Data from:
  MB111
  Table 0
  Line 0:
Place of purchase:Tindouf, Algeria
Date:P 2021 Mar
Mass (g):243
Pieces:1
Class:CR2
Weathering grade:high
Fayalite (mol%):1.6±0.5 (n=5)
Ferrosilite (mol%):2.4 (n=1)
Wollastonite (mol%):0.7
Magnetic suscept.:5.06
Classifier:T. Prestgard, IPAG; J. Gattacceca, CEREGE
Type spec mass (g):20.4
Type spec location:CEREGE
Main mass:Kuntz
Finder:anonymous
Comments:work name K540; 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)
Kuntz: Fabien Kuntz, France; Website (private address)
IPAG: Institut de Planétologie et d’Astrophysique de Grenoble 414, Rue de la Piscine Domaine Universitaire 38400 St-Martin d’Hères , France (institutional address; updated 1 Aug 2013)
Catalogs:
References: Published in Meteoritical Bulletin, no. 111, in preparation (2022)
Find references in NASA ADS:
Find references in Google Scholar:
Photos:
CreditPhotos
Public domain photographs:
Jerome Gattacceca   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8745 approved meteorites from (Northwest Africa) (plus 1880 unapproved names)

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