NWA 17214 ( 6,300 g )

Vorderseite Hochglanz poliert.
Frontside highly polished.
 
Northwest Africa 17214 (NWA 17214)
(Northwest Africa)
Purchased: October, 2024
Classification: HED achondrite (Eucrite, melt breccia)
History: The meteorite was purchased from a Morrocan dealer on the mineral fair in Munich, Germany.
Physical characteristics: Gark grayish rock partly covered with fusion crust.
Petrography: Complex polymict melt breccia composed of a variety of up to 4 mm sized mineral fragments in finely recrystallized melt rock matrix. Predominant mineral phases are exsolved pyroxene, low-Ca pyroxene, zoned pyroxene, olivine, and calcic plagioclase. Minor phases include silica, chromite, ilmenite, troilite, FeNi metal, and Ni-free metallic iron.
Geochemistry: low-Ca pyroxene host to exsolution lamellae: Fs60.1±0.4Wo2.3±0.2 (Fs59.2-60.6Wo2.0-2.5, FeO/MnO=28-29, n=7); Ca-pyroxene exsolution lamellae: Fs27.6±0.5Wo41.6±0.7 (Fs26.8-28.2Wo40.9-42.6, FeO/MnO=26-33, n=7); low-Ca pyroxene: Fs31.4±0.1Wo2.2±0.2 (Fs31.2-31.6Wo2.0-2.5, FeO/MnO=27-30, n=7); zoned pyroxene: Fs32.4±10.2Wo2.2±0.2 (Fs23.6-52.3Wo2.0-2.3, FeO/MnO=24-31, n=14); olivine: Fa27.0±0.7 (Fa26.5-28.7, FeO/MnO=45±2, n=7); calcic plagioclase: An92.0±0.9 (An90.5-93.2, n=7).
 
Place of purchase:
Munich, Germany
Date:
P October, 2024
Mass (g):
123
Pieces:
1
Class:
Eucrite-melt breccia
Shock stage:
high
Weathering grade:
moderate
Fayalite (mol%):
27.0
Ferrosilite (mol%):
60.1; 27.6; 31.4; 32.4
Wollastonite (mol%):
2.3; 41.6; 2.2; 2.2
Classifier:
A. Greshake, MNB
Type spec mass (g):
20.4
Type spec location:
MNB
Main mass:
Philippe Schmitt-Kopplin and Hanno Strufe
Comments:
Submitted by Ansgar Greshake