[meteorite-list] AD : JAH626, Shocked polymict eucrite breccia (basaltic and cumulate eucrite)

[Fabien Kuntz]

Hello, 

introduce here a new very nice eucrite, polymict, highly shocked and partialy 
metled... 


On the field belived as potentialy new lunar, the inside is close in look of 
eucrite as NWA 2910, NWA 3159, and the analysis done : 



Polymict breccia composed of both basaltic eucrite and cumulate eucrite 
clasts plus related debris.  Pigeonite of various compositions (some exhibiting 
exsolution lamellae of clinopyroxene within orthopyroxene), calcic plagioclase, 
silica polymorph, chromite, troilite and rare zircon.  Low-Ca 
pigeonite (Fs32.1-39.3Wo6.3-5.1; FeO/MnO = 29.5-31.2), clinopyroxene exsolution 
lamellae (Fs30.6-33.5Wo31.9-29.8; FeO/MnO = 30.7-31.0), pigeonite (Fs51.8Wo12.7; 
FeO/MnO = 30.8).  Plagioclase has been transformed by shock into aggregates of 
fine anisotropic blades in a subspherulitic texture, indicative of quenching 
from melt.

Three specimens have been found (446g, 18.6g and 1.6g), the two smallest have 
been sended for the classification, and I finally produced only one endcut in 
this meteorite (36.03g), not polished but... Click on the pictures for high 
resolution, look at the inside of the vugs on the last one!

www.wwmeteorites.com/JAH626.html

Feel free to make offer.

Fabien