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Northwest Africa 16357
Basic information Name: Northwest Africa 16357
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 16357
Observed fall: No
Year found: 2023
Country: (Northwest Africa)
Mass:help 430 g
Classification
  history:
Meteoritical Bulletin:  MB 113  (2024)  CVoxA3
Recommended:  CVoxA3    [explanation]

This is 1 of 9 approved meteorites classified as CVoxA3.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CV chondrites, and CV-CK clan chondrites
Comments: Approved 16 Jan 2024
Revised 27 Mar 2024: Updated class per metbull text
Writeuphelp
Writeup from MB 113:

Northwest Africa 16357 (NWA 16357)

(Northwest Africa)

Purchased: 2023

Classification: Carbonaceous chondrite (CVox3)

History: Sergey Vasiliev purchased the 430g sample from a dealer at the Munich mineral show in 2023.

Physical characteristics: Stone has an irregular triangular shape with a black wind-ablated exterior that shows chondrules and CAIs. The cut face shows red chondrules and abundant CAIs in a dark grey matrix.

Petrography: Description and classification (A. Love, App) Sample shows a chondritic texture composed of sparsely distributed chondrules (with an average apparent diameter of 854 µm, n=16) and CAIs set within a fine-grained matrix of lath-shaped fayalite and rounded clusters of hedenbergite. Additional minerals are: chromite, pentlandite, minor Ni-bearing troilite, diopside and spinel.

Geochemistry: (A. Love, App) olivine (Fa9.3±10.7, Fe/Mn65.7±43.5, n=11); low Ca-pyroxene (Fs2.3±1.3Wo2.0±2.9, Fe/Mn=11.1±4.6 n=5). Sulfides contain 9.06wt% Ni, n=8.

Classification: Carbonaceous chondrite (CVOx3 C-S1 W2) Based on chondrule diameters, textures, mineral compositions, abundance of Ni in sulfides and magnetic susceptibility, sample is a CVOxA3, after Gattacceca et al. (2020).

Specimens: Sergey Vasiliev holds the main mass. A polished thin section, an endcut and 2 slices weighing a total of 21.03 g are on deposit at App.

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:
  MB113
  Table 0
  Line 0:
Date:P 2023
Mass (g):430
Pieces:1
Class:CVox3
Shock stage:C-S1
Weathering grade:W2
Fayalite (mol%):9.3±10.7
Ferrosilite (mol%):2.3±1.3
Wollastonite (mol%):2.0±2.9
Magnetic suscept.:3.60
Classifier:A. Love, App
Type spec mass (g):21.03
Type spec location:App
Main mass:Sergey Vasiliev
Comments:Submitted by Anthony Love
Institutions
   and collections		 App: Department of Geology, 572 Rivers St., Appalachian State University, Boone, NC 28608, United States (institutional address; updated 7 Mar 2013)
Catalogs:
References: Published in Meteoritical Bulletin, no. 113, in preparation (2024)
Find references in NASA ADS:
Find references in Google Scholar:
Photos:
CreditPhotos
Photos from the Encyclopedia of Meteorites:
Sergey Vasiliev   
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9933 approved meteorites from (Northwest Africa) (plus 1837 unapproved names)

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