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.

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, …

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.

2025年1月2日 · Take, for example, pallasite meteorites – extra-terrestrial rocks that are strung through with gemstones, offering tantalizing glimpses into our Solar System’s deep history.

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%.

2010年6月10日 · P allasites, meteorites composed mainly of olivine (Mg-Fe 2 SiO 4) and metallic Fe-Ni, are widely thought to have formed at the boundary between the metallic core of a melted and differentiated asteroid and the surrounding olivine …

2019年9月16日 · We show that intrusive ferromagmatism can produce pallasites, an enigmatic class of meteorites composed of olivine crystals entrained in a matrix of iron–nickel metal 4.

Pallasites are mainly composed of subequal proportions of olivine and Fe-Ni metal, with minor amounts of troilite, chromite, Ca-phosphates and schreibersite [14.2]. They are divided into three groups on the basis of mineralogy and oxygen isotope composition [14.2, 14.3, 14.6–14.12]. Most pallasites belong to the Main Group (PMG).

2020年9月15日 · We present high strain-rate deformation experiments with the model system olivine + FeS melt ± gold melt to investigate pallasite formation and the evolution of their parent bodies and compare the resulting microstructures to two samples of Seymchan pallasite.