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Northwest Africa 14051
Basic information Name: Northwest Africa 14051
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14051
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass:help 9.5 g
Classification
  history:
Recommended:  C3-ung    [explanation]

This is 1 of 22 approved meteorites classified as C3-ung.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), and Ungrouped chondrites
Comments: Approved 6 Jul 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 14051 (NWA 14051)

(Northwest Africa)

Purchased: 2020

Classification: Carbonaceous chondrite (C3, ungrouped)

History: Bought in Morocco

Physical characteristics: One crusted stone. Cut face reveals a dark interior with small chondrules.

Petrography: (J. Gattacceca, CEREGE) Chondrules (average apparent diameter 210±160 µm, n=40) set in an abundant fine-grained, iron-rich matrix (72 vol% from point coounting, n=290). Chondrules have fine-grained dust rims with radial cracks. Opaque minerals are metal, troilite, magnetite. No CAIs were observed.

Geochemistry: Olivine Fa13.0±17.4, range Fa0.6-33.7, Fa PMD = 108% (n=12). Cr2O3 in ferroan olivine 0.39±0.16 (n=8). Low-Ca pyroxene Fs4.4±3.4Wo3.2±2.1 (n=5). Defocused matrix analyses FeO = 33.6 wt%, analytical total 90.6 wt%. XRD of a powdered sample (D. Borschnek, CEREGE) does not reveal the presence of hydrous phases (serpentine, tochilinite) typically observed in type 2 chondrites using the same experimental setup. Oxygen isotopic composition (J, Gattacceca, C, Sonzogni, CEREGE) from analysis of one acid-washed 1.5 mg aliquot of a powdered 234 mg bulk sample is δ17O=-0.907‰, δ18O=5.894‰ , Δ17O=-3.972‰ (slope 0.52, analytical uncertainties 0.08‰, 0.12‰, 0.03‰ respectively),

Classification: Carbonaceous chondrite (C3-ung). Carbonaceous chondrite based on petrography and oxygen isotopes. Type 3 based on the unequilibrated silicates and absence of phyllosilicates. The absence of phyllosilicates distinguishes this meteorite from CM2 chondrites. The oxygen istopic composition plots below the trend defined by CM chondrites. The high matrix abundance, chondrule size and oxygen isotopic composition distinguish this meteorite from CO3 chondrites.

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

Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2020
Mass (g):9.5
Pieces:1
Class:C3-ung
Weathering grade:moderate
Fayalite (mol%):13.0±17.4 (n=12)
Ferrosilite (mol%):4.4±3.4 (n=5)
Wollastonite (mol%):3.2±2.1
Magnetic suscept.:4.56
Classifier:J. Gattacceca, CEREGE
Type spec mass (g):2
Type spec location:CEREGE
Main mass:Labenne
Finder:anonymous
Comments:work name LL131020a; submitted by Jerome Gattacceca
Plots: O isotopes:  
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)
Labenne: 23, rue de Esperance, 75013 Paris, France; Website (private address; updated 29 Aug 2012)
Catalogs:
References: Published in Meteoritical Bulletin, no. 110, in preparation (2021)
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 8037 approved meteorites from (Northwest Africa) (plus 1947 unapproved names)

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