Meteoritical Bulletin: Entry for Northwest Africa 15600

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Northwest Africa 15600

Basic information

Name: Northwest Africa 15600
This is an OFFICIAL meteorite name.
Abbreviation: NWA 15600
Observed fall: No
Year found: 2022
Country: (Northwest Africa)
Mass: 1200 g

Classification
history:

Recommended:

CK3 [explanation]

This is 1 of 75 approved meteorites classified as CK3. [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CK chondrites, CK3 chondrites, and CV-CK clan chondrites

Comments:

Approved 7 Jan 2023

Writeup

help

Writeup from MB 112:

Northwest Africa 15600 (NWA 15600)

(Northwest Africa)

Purchased: October, 2022

Classification: Carbonaceous chondrite (CK3)

History: The meteorite was purchased from a group of meteorite hunters in Nouadhibou, Mauritania, in October, 2022.

Physical characteristics: Ten grayish to slightly greenish fragments without fusion crust.

Petrography: The meteorite displays a dark grayish to brownish interior and is composed of separated and well-defined chondrules (apparent mean diameter about 800 µm) and few fine-grained CAIs (up to 1 mm) set in a fine-grained ferroan matrix dominated by Ni-bearing olivine. Less abundant phases include low-Ca pyroxene, Ca-pyroxene, intermediate plagioclase, and minor FeS. Cr-rich magnetite is abundant; metal was not detected. The meteorite is strongly weathered with and contains abundant secondary calcite.

Geochemistry: olivine: Fa_26.1±12.3(Fa_1.2-38.0, FeO/MnO=90±9; NiO: 0.03-0.63 wt%, n=29); low-Ca pyroxene: Fs_7.5±5.9Wo_1.5±0.8(Fs_0.9-16.6Wo_0.9-3.1, n=24); Ca-pyroxene: Fs_1.7±1.1Wo_36.4±2.1(Fs_1.0-5.7Wo_31.8-38.0, n=17); feldspar: An_5.7-25.3Ab_73.4-92.5Or_1.1-2.3, n=12; magnetite contains 1.15±0.06 wt% TiO₂ and 2.8±0.2 wt% Cr₂O₃, n=3

Data from:
  MB112
  Table 0
  Line 0:

Place of purchase:	Nouadhibou, Mauritania
Date:	P October, 2022
Mass (g):	1200
Pieces:	10
Class:	CK3
Shock stage:	S1
Weathering grade:	high
Fayalite (mol%):	26.1
Ferrosilite (mol%):	7.5; 1.7
Wollastonite (mol%):	1.5; 36.4
Classifier:	A. Greshake, MNB
Type spec mass (g):	69.1
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. 111, in preparation (2023)

Find references in NASA ADS:
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Geography:

Coordinates:

Unknown.

Statistics:
This is 1 of 8904 approved meteorites from (Northwest Africa) (plus 1871 unapproved names)

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