header
  MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 1 Apr 2023
Search for: Search type: Search limits: Display: Publication:
Names
Text help
Places
Classes
Years
Contains
Starts with
Exact
Sounds like
NonAntarctic
Falls  Non-NWAs
What's new
  in the last:
Limit to approved meteorite names
Search text:  
Northwest Africa 15660
Basic information Name: Northwest Africa 15660
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15660
Observed fall: No
Year found: 2022
Country: (Northwest Africa)
Mass:help 319 g
Classification
  history:
Recommended:  CK4    [explanation]

This is 1 of 121 approved meteorites classified as CK4.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (equilibrated), CK chondrites, CK chondrites (type 4-6), and CV-CK clan chondrites
Comments: Approved 23 Feb 2023
Writeuphelp
Writeup from MB 112:

Northwest Africa 15660 (NWA 15660)

(Northwest Africa)

Purchased: 2022

Classification: Carbonaceous chondrite (CK4)

History: The meteorite was purchased from a meteorite dealer in Morocco.

Physical characteristics: Grayish to dark greenish rock largely covered with fusion crust.

Petrography: The meteorite displays a fresh dark greenish interior and is composed of sparse, sharply defined chondrules (apparent mean diameter about 850 µm) set in abundant recrystallized matrix. Main mineral phase in chondrules and matrix is ferroan, Ni-bearing olivine. Minor phases include low-Ca pyroxene, Ca-pyroxene, intermediate plagioclase, troilite, and pentlandite. Cr-rich magnetite is abundant; no CAIs detected.

Geochemistry: olivine: Fa31.9±0.1 (Fa31.7-32.0, FeO/MnO=109±16; NiO=0.52±0.04 wt%, n=10); low-Ca pyroxene: Fs26.7±0.1Wo0.5±0.1 (Fs26.5-26.9Wo0.4-0.6, n=10); Ca-pyroxene: Fs14.0±1.9Wo48.8±0.7 (Fs10.3-16.3Wo46.8-49.6, n=10); feldspar: An25.4-70.4Ab28.8-68.8Or0.8-5.8, n=10; magnetite contains 5.88±0.13 wt% Cr2O3, n=7

Data from:
  MB112
  Table 0
  Line 0:
Place of purchase:Morocco
Date:P 2022
Mass (g):319
Pieces:1
Class:CK4
Shock stage:low
Weathering grade:low
Fayalite (mol%):31.9
Ferrosilite (mol%):26.7; 14.0
Wollastonite (mol%):0.5; 48.8
Classifier:A. Greshake, MNB
Type spec mass (g):20.7
Type spec location:MNB
Main mass:Mateusz Szyszko
Comments:Submitted by Ansgar Greshake
Institutions
   and collections		 MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
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)

Direct link to this page