Details
A Transitional Slice of Seymchan Meteorite
Discovered in Russia, 1967; modern cutting
A highly aesthetic Seymchan transitional pallasite and a notable example of the textural heterogeneity of the Seymchan meteorite. The metal-rich areas display a prominent Widmanstätten pattern and represent the olivine-free region at the top of the iron-nickel core. The olivine-rich aggregates were derived from a fragmented olivine layer at the bottom of the mantle that was invaded by a metallic liquid during mixing at the core-mantle boundary.
7 x 6in. (18 x 15.5cm.)
563.8g.

Provenance
The Macovich Collection of Meteorites
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Lot Essay

Seymchan is an unusual and remarkable pallasite; large portions of the rock are olivine free. Pallasites are formed at the core-mantle boundary of an asteroid that experienced melting: molten metal from the core mixed with olivine crystals settling downwards from the mantle.

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