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NWA 12829  (9,360 g)

NWA 12829 (9,360 g)

Northwest Africa 12829 (NWA 12829)

(Northwest Africa)

Purchased: 2019

Classification: Carbonaceous chondrite (CK3)

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

Physical characteristics: Several black fragments with some fusion crust.

Petrography: The meteorite displays a dark brownish interior and is composed of several sharply defined chondrules (mean diameter about 900 μm) set into abundant recrystallized matrix. Olivine and low-Ca pyroxene are compositionally zoned in most chondrules and also in some matrix grains. Minor phases include intermediate plagioclase, Ca-pyroxene, and Fe,Ni-sulfides. Cr-rich magnetite is abundant; metal was not detected.

Geochemistry: olivine: Fa24.6±11.9 (Fa1.1-33.6, FeO/MnO= 139±17, n=25); low-Ca pyroxene: Fs12.9±10.2Wo1.5±1.2 (Fs1.4-26.5Wo0.9-4.4, n=20); Ca-pyroxene: Fs1.7±0.1Wo33.4±1.2, n=5; feldspar: An61.1±1.3Ab37.7±1.2Or1.3±0.1, n=6


Place of purchase: Morocco

Date: P 2019

Mass (g): 19 + 500

Pieces: several

Class: CK3

Shock stage: S2

Weathering grade: moderate

Fayalite (mol%): 24.6

Ferrosilite (mol%): 12.9; 1.7

Wollastonite (mol%): 1.5; 33.4

Classifier: A. Greshake, MNB

Type spec mass (g): 4

Type spec location: MNB

Main mass: Philippe Schmitt-Kopplin

Comments: Submitted by Ansgar Greshake


    140,00 €Preis
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