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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 17 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 Meteoritical Bulletin, no. 110, in preparation (2021)
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 8495 approved meteorites from (Northwest Africa) (plus 1899 unapproved names)

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