The pallasites are a class of stony–iron meteorite. They are relatively rare, and can be distinguished by the presence of large olivine crystal inclusions in the ferro-nickel matrix.

Pallasites are believed to form between the silicate mantle, or outer shell, and molten metal core of a differentiated asteroid. The primary silicate mineral in pallasites is olivine, distinguishable by its greenish hue. Seymchan pallasite. Image copyright ASU/CMS.

…of stony iron, known as pallasites (formerly called lithosiderites), the nickel-iron is a coherent mass enclosing separated stony parts. The material that makes up pallasites probably formed, after melting and differentiation of their parent asteroids, at the interface between the nickel-iron metal core and the surrounding silicate mantle.

Perhaps the most beautiful of all meteorites, pallasites contain abundant olivine suspended in a nickel-iron matrix. When cut and polished, pallasites reveal translucent crystals, which are naturally green in color but sometimes acquire yellow, …

2024年10月15日 · Pallasites are amongst the simplest and yet most improbable of meteorites. Pallasite mineralogy is simple; classic pallasites are composed of metal (kamacite plus taenite) and olivine in subequal amounts by weight, with minor …

2019年9月16日 · Our calculations show that ferrovolcanic surface eruptions are more likely on bodies with mantles less than 50 km thick. We show that intrusive ferromagmatism can produce pallasites, an enigmatic...

1977年6月1日 · Pallasites are highly differentiated meteorites and provide a unique sample from the deep interiors of solar system parent bodies. They contain evidence of the former existence of one or more residual melts. Olivine is a major phase. Its primary shape is rounded; the angular crystals in many pallasites are secondary.

2020年9月15日 · Angular pallasites are formed by core-mantle differentiation followed by an impact. Pallasites, stony-iron meteorites predominantly composed of olivine crystals and Fe-Ni metal, are samples of the interior of early solar system bodies and can thus provide valuable insights into the formation of terrestrial planets.

The main pallasite contains several regions of “massive” olivine clusters up to 11 cm in diameter with thin metal veins only a few millimeters in width. Fo86.4 with molar Fe/Mg = 0.1367, Fe/Mn = 40.37, and Ni = 0.03 wt%.

Pallasite meteorites are among the most visually stunning and scientifically significant meteorites known to humanity. Classified as stony-iron meteorites, they consist of a mesmerizing blend of metallic iron-nickel and silicate minerals, primarily olivine.