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Northwest Africa 14345
Basic information Name: Northwest Africa 14345
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14345
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 558 g
Classification
  history:
Recommended:  CVred3    [explanation]

This is 1 of 19 approved meteorites classified as CVred3.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CV chondrites, and CV-CK clan chondrites
Comments: Approved 11 Nov 2021
Writeuphelp
Writeup from MB 110:

Northwest Africa 14345 (NWA 14345)

(Northwest Africa)

Purchased: 2021

Classification: Carbonaceous chondrite (CVred3)

Petrography: (K. Metzler, IfP) Chondrules, CAIs, and AOAs are embedded in a dark fine-grained matrix, (~30-40 vol% matrix). Most chondrules have apparent diameters between 0.2 and 1 mm, some up to 4 mm. CAIs with apparent sizes up to 9 mm are observed. Type II chondrules are rare. Opaque minerals are dominated by Ni-free sulfides and metallic iron with varying Ni concentration. Most metal is oxidized by terrestrial weathering.

Geochemistry: Mineral compositions and geochemistry: The mean composition of olivine grains in chondrules and chondrule fragments is Fa8.6±10.2 (Fa0.4-39.7); n=17. The mean composition of low-Ca pyroxene in chondrules and chondrule fragments is Fs1.2±0.3 Wo1.0±0.2 (Fs0.7-1.5 Wo0.7-1.4); n=13. Ni concentration in sulfides (wt%): 0.1±0.1 (0.0-0.3); n=15. Ni concentration in metal (wt%): 30.3±21.4 (5.4-54.9); n=10.

Classification: CV chondrite based on CAI and AOA occurrence, apparent sizes of chondrules and CAIs, chondrule-matrix ratio, and mineral chemistry. Petrologic type 3 based on the chemical variation of olivine and pyroxene. The very low Ni content of sulfides is typical of the reduced subgroup Gattacceca et al., 2020.

Bibliography:
  • Gattacceca J.,Bonal L.,Sonzognia C., and Longereya J. (2020) CV chondrites: More than one parent body. Earth Planet. Sci. Letts. 547, 116467. (link)
Data from:
  MB110
  Table 0
  Line 0:
Place of purchase:Mauritania
Date:P 2021
Mass (g):558
Pieces:1
Class:CVred3
Shock stage:C-S1
Weathering grade:high
Fayalite (mol%):8.6±10.2
Ferrosilite (mol%):1.2±0.3
Wollastonite (mol%):1.0±0.2
Classifier:K. Metzler, IfP
Type spec mass (g):20
Type spec location:IfP
Main mass:Gregor Pacer, Bad Bellingen, Germany
Comments:Submitted by K. Metzler, IfP
Institutions
   and collections
IfP: Institut für Planetologie, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany (institutional address; updated 23 Jan 2012)
Catalogs:
References: Published in Gattacceca J., McCubbin F.M., Grossman J., Bouvier A., Chabot N.L., D'Orazio M., Goodrich C., Greshake A., Gross J., Komatsu M., Miao B., and Schrader D. (2022) The Meteoritical Bulletin, No. 110. Meteorit. Planet. Sci. 1-4
Find references in NASA ADS:
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Domjan Svilkovic   
Geography: 
Coordinates:Unknown.

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

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