How were pallasites formed?

Pallasite Formation



Welcome to Space Gems™. We provide fine quality Pallasite meteorites to discriminating Collectors around the World. One question that many have asked over the years is how were pallasites formed?

During the early formation of our solar system (approximately 4.5 billion years ago) there were many more objects traveling through our solar system that there are today. These included asteroids, planetoids and early, differientated proto-planets. Just like our Earth, many differientiated proto-planets consisted of a silica and olivine rich mantle surrounding a very dense iron-nickel core (see diagram below). It is thought that pallasites (which are composed of olivine embedded in an iron-nickel matrix) are derived from the boundary between the Mantle and Core. We believe that the most likely scenerio for the creation of the pallasites was a cataclysmic impact event that penetrated deep enough to remove both mantle and core material which was mixed in a liquid state (see image above). This mixture of iron-nickel and olivine then cooled over millions of years in the zero gravity environment of space to produce the stunningly beautiful meteorites known as Pallasites. Some pallasites were subjected to further impact-melt events. For an interesting paper on the formation of pallasites click here.

 

Earth Mantle-Core Diagram

 


NOTICE OF COPYRIGHT: This website and all of its contents are copyrighted. No reproduction without prior written permission from the copyright holder. Special thanks to Joe Tucciarone (www.joetucciarone.com) for graciously allowing us to use an image of his beautiful painting "Impact". The Earth geology image is modified from Wikipedia and is freely available under the GNU free documentaion licensing (see (http://en.wikipedia.org/wiki/File:Earth-crust-cutaway-english.svg).



NOTICE OF COPYRIGHT: This website and all of its contents are copyrighted. No reproduction without prior written permission from the copyright holder.