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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:help 1200 g
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 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: Fa26.1±12.3 (Fa1.2-38.0, FeO/MnO=90±9; NiO: 0.03-0.63 wt%, n=29); low-Ca pyroxene: Fs7.5±5.9Wo1.5±0.8 (Fs0.9-16.6Wo0.9-3.1, n=24); Ca-pyroxene: Fs1.7±1.1Wo36.4±2.1 (Fs1.0-5.7Wo31.8-38.0, n=17); feldspar: An5.7-25.3Ab73.4-92.5Or1.1-2.3, n=12; magnetite contains 1.15±0.06 wt% TiO2 and 2.8±0.2 wt% Cr2O3, n=3

Data from:
  Table 0
  Line 0:
Place of purchase:Nouadhibou, Mauritania
Date:P October, 2022
Mass (g):1200
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
   and collections
MNB: Museum für Naturkunde, Invalidenstraße 43, D-10115 Berlin, Germany (institutional address; updated 24 Dec 2011)
References: Published in Meteoritical Bulletin, no. 111, in preparation (2023)
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     This is 1 of 8904 approved meteorites from (Northwest Africa) (plus 1871 unapproved names)

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