拍品 30
30
A TRANSITIONAL SLICE OF SEYMCHAN METEORITE
A TRANSITIONAL SLICE OF SEYMCHAN METEORITE
A TRANSITIONAL SLICE OF SEYMCHAN METEORITE
A TRANSITIONAL SLICE OF SEYMCHAN METEORITE
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A TRANSITIONAL SLICE OF SEYMCHAN METEORITE

Pallasite – PMGMagadan District, Russia (62°54’ N, 152°26’ E)

細節
A TRANSITIONAL SLICE OF SEYMCHAN METEORITE
Pallasite – PMG
Magadan District, Russia (62°54’ N, 152°26’ E)
A highly aesthetic long thin Seymchan transitional pallasite slice 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; supported on fitted stand
10½ x 3in. (272 x 65mm.)
440g.

榮譽呈獻

James Hyslop
James Hyslop
+44 (0)20 7752 3205

拍品專文

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.

更多來自 Science and Natural History

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