NWA 16037 ( 30,200 g )

Vorderseite Hochglanz poliert.
Frontside highly polished.
 
Northwest Africa 16037 (NWA 16037)
(Northwest Africa)
Purchased: 2023 Jun
Classification: HED achondrite (Eucrite, melt breccia)
History: The meteorite was purchased from a meteorite dealer in Erfoud, Morocco.
Physical characteristics: Two grayish fragments with patches of fusion crust.
Petrography: Eucrite melt breccia composed of up to 1.6 cm sized angular to subrounded basaltic and bulk rock clasts set in abundant crystallized shock melt. Lithic clasts predominantly consist of up to 1 mm zized exsolved pyroxene and typically lath shaped calcic plagioclase. Mineral grains entrained in the melt matrix often show resorption textures. Minor phases include silica, chromite, ilmenite, and FeS. No metallic iron detected.
Geochemistry: low-Ca pyroxene: Fs59.9±0.6Wo2.7±0.6 (Fs58.0-61.4Wo1.9-3.6, FeO/MnO=27-32, n=7); augite exsolutions: Fs25.5±0.3Wo43.6±0.4 (Fs25.2-26.0Wo43.0-44.0, FeO/MnO=28-31, n=7); calcic plagioclase: An89.1±0.7 (An87.8-90.4, n=7)
 
Place of purchase:
Erfoud, Morocco
Date:
P 2023 Jun
Mass (g):
686
Pieces:
2
Class:
Eucrite-melt breccia
Shock stage:
high
Weathering grade:
low
Ferrosilite (mol%):
59.9; 25.5
Wollastonite (mol%):
2.7; 43.6
Classifier:
A. Greshake, MNB
Type spec mass (g):
26
Type spec location:
MNB
Main mass:
Hanno Strufe
Comments:
Submitted by Ansgar Greshake