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Northwest Africa 14718
Basic information Name: Northwest Africa 14718
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 14718
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 46 g
Classification
  history:
Recommended:  CV3    [explanation]

This is 1 of 593 approved meteorites (plus 1 unapproved name) classified as CV3.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CV chondrites, and CV-CK clan chondrites
Comments: Approved 19 Mar 2022
Writeuphelp
Writeup from MB 111:

Northwest Africa 14718 (NWA 14718)

(Northwest Africa)

Purchased: 2021

Classification: Carbonaceous chondrite (CV3)

Petrography: (K. Metzler, IfP) Chondrules, CAIs and AOAs are embedded in a dark fine-grained matrix, which mainly consists of equilibrated Fe-rich olivine (about 30 vol% matrix). Most chondrules have apparent diameters between 0.2 and 1 mm, some up to 2.5 mm. CAIs with sizes up to 2.5 mm are observed. Type II chondrules are rare. Opaque phases are troilite, pentlandite and some (completely weathered) Fe-Ni metal.

Geochemistry: Mineral compositions and geochemistry: The mean composition of equilibrated olivine grains in matrix is Fa49. Random measurements of olivine in chondrules and chondrule fragments revealed Fa12.7±6.7 (Fa3.7-24-2); n=14. The mean composition of low-Ca pyroxene in chondrules and chondrule fragments is Fs2.2±1.2Wo1.6±1.2 (Fs0.9-4.3Wo0.6-3.8); n=10.

Classification: CV chondrite based on CAI and AOA occurrence, apparent sizes of chondrules and CAIs, and chondrule-matrix ratio. Petrologic type 3 based on the chemical variation of olivine and pyroxene.

Data from:
  MB111
  Table 0
  Line 0:
Place of purchase:Mauritania
Date:P 2021
Mass (g):46
Pieces:3
Class:CV3
Shock stage:C-S3
Weathering grade:high
Fayalite (mol%):12.7±6.7
Ferrosilite (mol%):2.2±1.2
Wollastonite (mol%):1.6±1.2
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. 111, in preparation (2022)
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Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 8674 approved meteorites from (Northwest Africa) (plus 1882 unapproved names)

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