OSM 010 (Pallasite)
Classification led by Cesca Willcocks
This meteorite belongs to Sean Mahoney.
This meteorite will possibly receive an official name of '***' - to be confirmed by the Nomenclature Committee of the Meteoritical Society.
The type specimen (***) will be on deposit at the University of Plymouth, along with a single, polished thin section.
Windows of olivine
Pallasites are stony-iron meteorites that make up only 0.2% of the global meteorite collection! The characteristic feature of these meteorites are the large olivine grains that are surrounded by a network of FeNi metals. We can also find minerals such as chromite, troilite and shreibersite in small grains across pallasites, and we saw this during our analysis of OSM 010. Pallasites are often incredibly pretty, in fact, you may have seen a photo of these meteorites with a light behind them like the photo below, to show the windows of olivine between the surrounding network of FeNi metal.
Layered image of OSM 010, where blue is olivine in, green if Fe metal, yellow is FeNi metal, pink is shreibersite, orange is troilite and purple is chromite.
Photo of the Imilac pallasite (source: Natural History Museum)
An insight to Earth's formation
The general understanding of pallasite meteorites is that they represent the core-mantle boundary of differentiated asteroids (asteroids that have been heated, partially melted and separated into a core, mantle and crust). With Earth also having a core, mantle and crust, these meteorites can provide us with a detailed insight into the processes that may have helped form our planet!
Sean is a meteorite collector and dealer based in Spain, and a registered member of both the IMCA and GMA.
You can find out more about Sean's meteorite collection, OuterSpacer Meteorites, on his web page.