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Northwest Africa 14052
Basic information Name: Northwest Africa 14052
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14052
Observed fall: No
Year found: 2020
Country: (Northwest Africa)
Mass:help 8.8 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 14052 (NWA 14052)

(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 240±200 µm, n=31) and chondrule fragments set in an abundant fine-grained, iron-rich matrix (75 vol% by point counting, n=240). Opaque minerals are metal (as small spheres in the silicates) and troilite. No CAIs were observed.

Geochemistry: Olivine Fa14.0±16.2, range Fa1.0-42.4 (n=8). Cr2O3 in ferroan olivine 0.49±0.10 (n=7). Low-Ca pyroxene Fs1.8Wo1.0 (n=1). Defocused matrix analyses FeO = 36.3±2.4 wt%, analytical total 94.5±1.1 wt% (n=4). 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 119 mg bulk sample is δ17O=-3.30‰, δ18O=2.739‰ , Δ17O=-4.724‰ (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 and the oxygen isotopic composition distinguish this meteorite from CM2 chondrites. The high matrix abundance and chondrule size distinguish it 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):8.76
Pieces:1
Class:C3-ung
Weathering grade:high
Fayalite (mol%):14.0±16.2 (n=8)
Ferrosilite (mol%):1.8 (n=1)
Wollastonite (mol%):1.0
Magnetic suscept.:3.71
Classifier:Jerome Gattacceca, CEREGE
Type spec mass (g):2.1
Type spec location:CEREGE
Main mass:Labenne
Finder:anonymous
Comments:work name LL131020b; 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 7937 approved meteorites from (Northwest Africa) (plus 1960 unapproved names)

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