Scientists find the source of one of the rarest meteorites to fall on Earthhttps://www.msn.com/en-us/news/tech...arest-meteorites-to-fall-on-earth/ar-AA13ejQe
The Ivuna meteorite landed in Tanzania in December 1938 and was subsequently split into a number of samples – one of which is housed at the Natural History Museum (NHM) in London.
Based on an analysis of an asteroid known as Ryugu, experts believe the Ivuna rock may have originated from the edge of the solar system.
Professor Russell said that apart from Ivuna, only four other known CI-type meteorites exist on Earth: Orgueil and Alais, which both fell in France, Tonk which fell in India, and the tiny Revelstoke meteorite which fell in Canada.
Ryugu belongs to a class of asteroids called carbonaceous, or C-type, asteroids.
C-type asteroids are rich in water, carbon and organic compounds from when the solar system formed.
The researchers said both Ryugu and the CI chondrites originate from the same region of space – the outskirts of the solar system – and cannot rule out the possibility that they could even share the same parent body.
Professor Russell said: ‘By comparing the forms of iron in both the asteroids and meteorites, we learned that Ryugu is a remarkably close match to CI chondrites.’
Terrestrial modification of the Ivuna meteorite and a reassessment of the chemical composition of the CI type specimenhttps://www.sciencedirect.com/science/article/pii/S0016703719306271
The Buseck Center for Meteorite Studies at Arizona State University has a piece of Ivanu.