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Northwest Africa 15684
Basic information Name: Northwest Africa 15684
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15684
Observed fall: No
Year found: 2021
Country: (Northwest Africa)
Mass:help 115 g
Classification
  history:
Recommended:  CVred3    [explanation]

This is 1 of 25 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 23 Feb 2023
Writeuphelp
Writeup from MB 112:

Northwest Africa 15684 (NWA 15684)

(Northwest Africa)

Purchased: 2021

Classification: Carbonaceous chondrite (CVred3)

History: Adrián Contreras Gómez (CRATER meteorites) purchased 5 pieces of different samples (main masses: 43.8 and 48.9 g) from the Saharawi meteorite dealer Yahdih Buhali Omar in 2021.

Physical characteristics: Samples are dark-colored uncrusted stones with visible chondrules protruding through the surface. The cut face shows chondrules and CAIs set within a dark-colored matrix.

Petrography: Description and classification (A. Love, App) Sample shows chondritic texture composed of chondrules (average apparent diameter 799 µm, n=15) and abundant CAIs set within a fine-grained opaque matrix. Additional minerals are: anorthite, FeNi grains, troilite and chromite.

Geochemistry: (A. Love, App) Olivine (Fa5.0±4.6, Fe/Mn=32.9±24.1, n=14); low Ca-pyroxene (Fs1.5±0.7Wo1.6±0.6, Fe/Mn=11.3±6.6 n=8). Sulfides contain 2.0 wt% Ni, n=6.

Classification: Carbonaceous chondrite (CV reduced 3 C-S2 W1) Based on chondrule diameter, matrix and CAI abundances, mineral chemistry and magnetic susceptibility, sample is a reduced CV3).

Specimens: Adrián Contreras Gómez (CRATER meteorites) holds the main masses. A polished thin section and three individuals individual weighing 22.18 g are on deposit at App.

Data from:
  MB112
  Table 0
  Line 0:
Date:P 2021
Mass (g):115
Pieces:5
Class:CVred3
Shock stage:C-S2
Weathering grade:W1
Fayalite (mol%):5.0±4.6
Ferrosilite (mol%):1.5±0.7
Wollastonite (mol%):1.6±0.6
Magnetic suscept.:4.18
Classifier:A. Love, App
Type spec mass (g):22.18
Type spec location:App
Main mass:Adrián Contreras Gómez (CRATER meteorites)
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. 112, in preparation (2023)
Find references in NASA ADS:
Find references in Google Scholar:
Geography: 
Coordinates:Unknown.

Statistics:
     This is 1 of 9042 approved meteorites from (Northwest Africa) (plus 1870 unapproved names)

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