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NWA 16279  ( 10,530 g )

NWA 16279 ( 10,530 g )

Northwest Africa 16279 (NWA 16279)

(Northwest Africa)

Purchased: 2023 Sept

Classification: Rumuruti chondrite (R4)

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

Physical characteristics: Twelve dark brownish fragments some of which partly covered with fusion crust.

Petrography: Breccia composed of up to 2.5 cm sized mostly angular type 4 and less abundant dark melt clast in type 4 matrix. Type 4 lithologies contain well-defined mostly rounded separated chondrules (apparent mean diameter about 400 µm) plus mineral fragments in abundant matrix dominated by Fe-rich olivine. Less abundant phases are Ca-pyroxene, low-Ca pyroxene, and sodic plagioclase. Opaques include troilite, pentlandite, and Ti-bearing chromite; no metal detected.

Geochemistry: olivine: Fa37.6±0.3 (Fa37.1-38.2, n=10); low-Ca pyroxene: Fs20.7±6.4Wo1.3±1.0 (Fs9.8-26.6Wo0.4-3.9, n=15); Ca-pyroxene: Fs9.8±0.6Wo46.8±0.7 (Fs8.7-10.6Wo45.9-47.9, n=7); feldspar (An9.0-11.9Ab87.2-90.1Or0.6-1.0, n=7)

 

Place of purchase:Morocco
Date:P 2023 Sept
Mass (g):1586
Pieces:12
Class:R4
Shock stage:S1
Weathering grade:moderate
Fayalite (mol%):37.6
Ferrosilite (mol%):20.7; 9.8
Wollastonite (mol%):1.3; 46.8
Classifier:A. Greshake, MNB
Type spec mass (g):31.7
Type spec location:MNB
Main mass:Hanno Strufe and Abdelfattah Gharrad
Comments:Submitted by Ansgar Greshake

 

 

 

 

    105,00 €Preis
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