Meteoritical Bulletin: Entry for Northwest Africa 15799

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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: 867 g

Classification
history:

Meteoritical Bulletin:	MB 112	(2023)	CK4
Recommended:			CK4 [explanation]

This is 1 of 128 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

Writeup

help

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: Fa_29.4±0.3(Fa_28.7-29.8, FeO/MnO=105±7; NiO: 0.46±0.06 wt%, n=10); low-Ca pyroxene: Fs_18.9±4.4Wo_0.8±0.1(Fs_7.2-23.9Wo_0.6-0.9, n=15); diopside: Fs_16.1±2.0Wo_48.1±1.5(Fs_12.2-19.5Wo_45.0-49.4, n=10); feldspar: An_30.7-77.6Ab_22.0-62.6Or_0.4.3.6, 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)

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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 9699 approved meteorites from (Northwest Africa) (plus 1854 unapproved names)

Also see:

This lists the most popular meteorites among people who looked up this meteorite.

Revision
history:

This lists important revisions made to data for this record.

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