• Tipo: Pallasite
• Località: Magadan, Russia
• Peso: 70,2g
• Dimensioni: 8,5 x 5,2 x 0,3 cm
• Anno di ritrovamento: 1967
• Peso totale conosciuto: 323,3 kg
• Trattamento superficiale: cut, Lucidato fetta
• Qualità extra - le olivine sono più grandi, molto chiare e splendidamente traslucide
• DESCRIZIONE DETTAGLIATA

Seymchan – unique pallasite da Russia The Seymchan meteorite fell in the Magadan region near the settlement of Seymchan in Russia, though the exact fall date remains unknown. It was discovered in 1967, with a 272 kg mass found in June and another 51 kg mass in October. Initially, only metallic parts were discovered, classifying it as an meteorite ferroso of type IIE. Only in 2004 was it determined that 20% of the samples contained olivine crystals, leading to its classification as a pallasite. Internal structure Seymchan has an unusual internal structure. Some parts are rich in olivine inclusions (pallasitic sections), while others consist almost entirely of iron–nickel alloys, mainly kamacite and taenite. In the metallic sections, characteristic pattern di Widmanstätten can be revealed after polishing and acid etching. It also contains minerals such as troilite, schreibersite, and chromite. Purely metallic section composed of kamacite and taenite Pallasitic section with olivine inclusions Origin The meteorite originated da a differentiated asteroid in the main belt between Mars and Jupiter, which in its early evolution underwent melting and material separation. Heavier elements (iron and nickel) settled in the core, while lighter silicate minerals formed the mantle. Later collisions and dynamic processes mixed metallic and silicate components. The result is a meteorite that contains both purely metallic parts and pallasitic sections with olivine crystals.