météorite#530 (nwa 1000, Achondrite Eucrite)

Northwest Africa 1000

Morocco

Purchased 2001

Achondrite (eucrite)

One stone, which was probably recovered in Morocco, was purchased by D. Gregory. The stone has a reported total weight of 1200 g. Mineralogy and classification (P. Warren, UCLA): subophitic and slightly variolitic (fan-spherulitic) texture with laths of plagioclase (up to 4 mm long) and pyroxene (up to 5 mm). Pyroxenes are zoned from En68Wo4 to En16Wo26 with an offshoot from the main trend toward En40Wo3 resulting from a reaction of early pigeonite with intruded veins of fayalitic olivine (Fo16–25). About half of the plagioclase has been shock-altered to isotropic glass (maskelynite), average An83 (range An75–86, n = 29). Bulk composition and ratios of Ga/Al = 0.020 and Fe/Mn = 38 support its classification as eucrite (Warren, 2002). Moderately weathered as shown by carbonate veining. Specimens: type specimen, 22 g, and one thin section, UCLA; main mass, Gregory.

C'est dingue...un walkman en météorite...faut rajouter ça dans le thème du mois...