NWA 13851 (6,693 g)
Northwest Africa 13851 (NWA 13851)
Classification: HED achondrite (Eucrite)
History: The meteorite was purchased from a dealer in Morocco.
Physical characteristics: Light grayish rock partly covered with fusion crust.
Petrography: The meteorite is an unbrecciated basalt composed of exsolved pyroxene and often lath-shaped calcic plagioclase grains up to 1 mm in size. Minor phases include silica, ilmenite, chromite, and FeS. No metallic iron has been detected.
Geochemistry: Low-Ca pyroxene: Fs60.4±0.2Wo1.9±0.1 (Fs60.0-60.7Wo1.8-2.1, FeO/MnO=28-29, n=7); Ca-pyroxene: Fs26.2±0.3Wo44.0±0.3 (Fs25.6-26.8Wo43.3-44.3, FeO/MnO=26-29, n=7); calcic plagioclase: An89.3±1.1 (An87.6-90.9, n=7).
Classification: Achondrite (eucrite)
Place of purchase: Morocco
Date: P 2021
Mass (g): 265
Shock stage: moderate
Weathering grade: low
Ferrosilite (mol%): 60.4
Wollastonite (mol%): 1.9
Classifier: A. Greshake, MNB
Type spec mass (g): 26.6
Type spec location: MNB
Main mass: Philippe Schmitt-Kopplin
Comments: Submitted by Ansgar Greshake