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

From: Fabien Kuntz <wwmeteorites_at_meteoritecentral.com>
Date: Wed, 20 Oct 2010 01:32:25 +0100 (BST)
Message-ID: <958976.63499.qm_at_web29614.mail.ird.yahoo.com>

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



      
Received on Tue 19 Oct 2010 08:32:25 PM PDT