Fabien writes:
This meteorite is the second meteorite found by my girlfriend, Marie, on her first hunt! The first one was a lovely fresh chondrite (unusualy fresh in this desert), and this one... a very interesting eucrite! The MetBul declares:Polymict breccia composed of both basaltic eucrite and cumulate eucrite clasts plusrelated debris. Pigeonite of various compositions (some exhibiting exsolution lamellae of clinopyroxene within orthopyroxene), calcic plagioclase, silica polymorph, chromite, troiliteand 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.
A. Irving, one of the classifiers, wrote "The level of shock experienced by this specimen was equal to that in some Martian meteorites, based on the features in plagioclase!"
This meteorite is used as a lab reference specimen for the DAWN mission, trying to establish a match between HEDs and 4-Vesta asteroid.
Click to view larger photos #1
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