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Northwest Africa 15799
Basic information Name: Northwest Africa 15799
     This is an OFFICIAL meteorite name.
Abbreviation: NWA 15799
Observed fall: No
Year found: 2023
Country: (Northwest Africa)
Mass:help 867 g
Classification
  history:
Recommended:  CK4    [explanation]

This is 1 of 126 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 4 Mar 2023
Writeuphelp
Writeup from MB 112:

Northwest Africa 15799 (NWA 15799)

(Northwest Africa)

Purchased: Jan 2023

Classification: Carbonaceous chondrite (CK4)

History: The meteorite was purchased from a group of meteorites hunters in Nouadhibou, Mauritania in January, 2023.

Physical characteristics: Grayish rock partly covered with fusion crust.

Petrography: The meteorite displays a dark grayish interior and is composed of separated and well-defined mostly rounded chondrules (apparent mean diameter about 750 µm) set in a fine-grained matrix dominated by ferroan Ni-bearing olivine. Olivine is compositionaly equilibrated, low-Ca pyroxene unequilibrated. Less abundant phases include Ca-pyroxene, intermediate plagioclase, and minor FeS. Cr-bearing magnetite is abundant; metal was not detected.

Geochemistry: olivine: Fa29.4±0.3 (Fa28.7-29.8, FeO/MnO=105±7; NiO: 0.46±0.06 wt%, n=10); low-Ca pyroxene: Fs18.9±4.4Wo0.8±0.1 (Fs7.2-23.9Wo0.6-0.9, n=15); diopside: Fs16.1±2.0Wo48.1±1.5 (Fs12.2-19.5Wo45.0-49.4, n=10); feldspar: An30.7-77.6Ab22.0-62.6Or0.4.3.6, n=12; magnetite contains 4.3±0.1 wt% Cr2O3, n=5

Data from:
  MB112
  Table 0
  Line 0:
Place of purchase:Nouadhibou, Mauritania
Date:P Jan 2023
Mass (g):867
Pieces:1
Class:CK4
Shock stage:S1
Weathering grade:moderate
Fayalite (mol%):29.4
Ferrosilite (mol%):18.9; 16.1
Wollastonite (mol%):0.8; 48.1
Classifier:A. Greshake, MNB
Type spec mass (g):58
Type spec location:MNB
Main mass:Salamu Ali
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 9429 approved meteorites from (Northwest Africa) (plus 1876 unapproved names)

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