Description
Writeup from MB 104:
Northwest Africa 8662 (NWA 8662)
(Northwest Africa)
Purchased: Oct 2014
Classification: HED achondrite (Eucrite)
Petrography: (P. Warren, UCLA) This eucrite shows a mildly brecciated version of typical medium-subophitic eucrite texture, including thoroughly exsolved pyroxenes. Minor Fe-metal.
Geochemistry: Low-Ca pyroxene En36.1±0.8Wo2.2±0.3, FeO/MnO wt ratio 30.1±1.2, n=8; high-Ca pyroxene En29.5±0.4Wo43.3±0.5, n=7; plagioclase An84.8±4.6, n=21.
Classification: Eucrite (monomict breccia).
Data from:
MB104
Table 0
Line 0:
Place of purchase:Morocco
Date:P Oct 2014
Mass (g):46.5
Pieces:1
Class:Eucrite
Shock stage:moderate
Weathering grade:moderate
Ferrosilite (mol%):61.7
Wollastonite (mol%):2.2
Classifier:P. Warren, UCLA
Type spec mass (g):10.7
Type spec location:UCLA
Main mass:Larry Atkins
Comments:Submitted by P. Warren
Institutions
and collectionsUCLA: Institute of Geophysics and Planetary Physics, University of California, Los Angeles, CA 90095-1567, United States (institutional address; updated 17 Oct 2011)
