Pallasite - Wikipedia
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.
Olivine - Meteorites, Mantle, Minerals | Britannica
2024年11月28日 · Olivine - Meteorites, Mantle, Minerals: In meteorites, the olivine is usually a forsteritic variety containing only Fa15 to Fa30. In the Nakhla (Egypt) meteorite (an achondrite meteorite), the olivine is more ferrous, however, containing as much as Fa65.
Olivine - Wikipedia
Mg-rich olivine has also been discovered in meteorites, [19] on the Moon [20] and Mars, [21] [22] falling into infant stars, [23] as well as on asteroid 25143 Itokawa. [24] Such meteorites include chondrites , collections of debris from the early Solar System ; and pallasites , …
Olivine-rich achondrites from Vesta and the missing mantle …
2021年9月14日 · Here we report the discovery of new olivine-rich meteorites that have asteroidal origins and are related to V-type asteroids or vestoids.
Fukang meteorite - Wikipedia
The Fukang meteorite is a meteorite that was found in the mountains near Fukang, China in 2000. It is a pallasite —a type of stony–iron meteorite with olivine crystals. It is estimated to be 4.5 billion years old.
Olivine: A rock-forming mineral. Used as the gemstone peridot.
Olivine is the name of a group of rock-forming minerals that are typically found in mafic and ultramafic igneous rocks such as basalt, gabbro, dunite, diabase, and peridotite. They are usually green in color and have compositions that typically range between Mg 2 SiO 4 and Fe 2 SiO 4.
Pallasites – Buseck Center for Meteorite Studies
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.
Asteroid & Planet Mantles Yield Stony-Iron Meteorites | AMNH
Perhaps chunks of an olivine mantle fell into an outer core, where churning molten metal tore them apart. Or perhaps the iron and olivine never completely separated. No one really knows. But whatever caused the mixing, the stony-iron meteorites known as pallasites provide a snapshot of this dynamic process at the moment when the mixture solidified.
Olivine in an unexpected location on Vesta’s surface | Nature
2013年11月6日 · Olivine is a major component of the mantle of differentiated bodies, including Earth. Howardite, eucrite and diogenite (HED) meteorites represent regolith, basaltic-crust, lower-crust and...
New Olivine-Rich Achondrite Meteorites Yield Insights Into the …
2021年9月21日 · These data show that the mantles of terrestrial planets are predominantly composed of the magnesium- and iron-rich mineral olivine and its high-pressure polymorphs. One of the largest asteroids, 4 Vesta, is also thought to have been differentiated and hypothesized to have an olivine-rich mantle.