Detailed explanation of peridot iron meteorite knowledge

Olivine iron meteorites, also known as olive meteorites, belong to a type of stone iron meteorites. Olive meteorite forms where the asteroid's silicate mantle meets the metallic core.

Olivine iron meteorite - structure and composition

It contains centimeter-scale olivine crystals, a component of olivine within the iron-nickel matrix. Areas of coarse metal will have Weidmann patterns after etching, with trace amounts of phosphite, ferric metrite, chromite, pyroxene, and phosphate (white calcite, magnesium phosphite, magnesium, and sodium)

Olivine iron meteorites - classification and subgroups

According to the composition of oxygen isotopes, iron meteorites can be divided into three subgroups [3]:

Main group (MG): almost all iron meteorites.

Eagle Station Group (ES): Only Eagle Station, Cold Bay, and Itzawisis Stone Meteorites. The interior has a metal base composed of rich peridot and rich nickel.

Pyroxene Group (PX): Only Vermillion and Yamato 8451. Its name comes from the high content of orthopyroxene (about 5%). The metal base shows a detailed octahedral Weidmann pattern.

Olivine iron meteorite - origin

Olive meteorite was once thought to have differentiated asteroids that were impacted, scattering material between the core and the boundary between the earth's culprit. Another new hypothesis is that they are substances mixed with core and geomaterial materials.

Olivine iron meteorite - history

A common mistake is to associate their names with the asteroid Pallas 2, but in fact the name comes from the German naturalist Peter Pallas (1741-1811), who discovered a meteorite with a mass of 680 kg in Krasnoyarsk in the Siberian mountains in 1772 [5]. Pallas's 1776 account of the mass of Krasnoyarsk was cited by E.F.F. Krany in the 1790s as an example of a meteorite falling on Earth, and his discussion was considered a fairy tale by most scientists at the time. This rock is unlike all rocks or ores in the area (it is unlikely that such a large rock was accidentally transported here), but some of his metallic composition is similar to several others found in a completely different area.