Print this page

Analysis of particles of the asteroid Ryugu delivers surprising results

Written by  Sunday, 25 September 2022 17:32
Write a comment
Frankfurt, Germany (SPX) Sep 25, 2022
Frank Brenker and his team are world leaders in a method that makes it possible to analyse the chemical composition of material in a three-dimensional and entirely non-destructive way and without complicated sample preparation - yet with a resolution of under 100 nanometres. Resolution expresses the smallest perceptible difference between two measured values. The method's long name is "Synchrotr

Frank Brenker and his team are world leaders in a method that makes it possible to analyse the chemical composition of material in a three-dimensional and entirely non-destructive way and without complicated sample preparation - yet with a resolution of under 100 nanometres. Resolution expresses the smallest perceptible difference between two measured values. The method's long name is "Synchrotron Radiation induced X-Ray Fluorescence Computed Tomography", in short SR-XRF-CT.

Japan had chosen Ryugu (English: Dragon's Palace) as the probe's destination because it is an asteroid which, due to its high carbon content, promised to deliver particularly extensive information about the origin of life in our solar system. The analyses conducted on 16 particles by the researchers together with the scientists in Frankfurt have now shown that Ryugu is composed of CI-type material.

These are very similar to the Sun in terms of their chemical composition. So far, CI-material has only rarely been found on Earth - material of which it was unclear how much it had been altered or contaminated when entering Earth's atmosphere or upon impact with our planet. Furthermore, the analysis confirms the assumption that Ryugu originated from a parent asteroid which formed in the outer solar nebula.

Until now, scientists had assumed that there was hardly any transport of material within the asteroid due to the low temperatures during the formation of the CI material in the early days of the solar system and therefore scarcely any possibility for a massive accumulation of elements.

By means of SR-XRF-CT, however, the researchers in Frankfurt found a fine vein of magnetite - an iron oxide mineral - and hydroxyapatite, a phosphate mineral, in one of the grains of the asteroid. Other groups of scientists established that the structure and other magnetite-hydroxyapatite regions in the Ryugu samples must have formed at a surprisingly low temperature of under 40 C. This finding is fundamental for interpreting almost all the results that the analysis of the Ryugu samples has generated and will generate in future.

In areas of the samples containing hydroxyapatite, Frank Brenker's team additionally detected rare earth metals - a group of chemical elements indispensable today for alloys and glassware for high-tech applications, among others. "The rare earths occur in the hydroxyapatite of the asteroid in concentrations 100 times higher than elsewhere in the solar system," says Brenker. What's more, he says, all the elements of the rare earth metals have accumulated in the phosphate mineral to the same degree - which is also unusual. Brenker is convinced: "This equal distribution of rare earths is a further indication that Ryugu is a very pristine asteroid that represents the beginnings of our solar system."

It is by no means a matter of course that researchers from Goethe University Frankfurt were allowed to examine samples from the Hayabusa 2 mission: after all, Japan undertook this space mission alone and, according to information from 2010, raised euro 123 million for it. It therefore also wants to reap a large part of the scientific harvest. But ultimately Japan did not want to forego the expertise of the German SR-XRF-CT specialists.

Research Report:Formation and evolution of Cb-type asteroid Ryugu: Direct evidence from returned samples


Related Links
Goethe University Frankfurt
Asteroid and Comet Mission News, Science and Technology

Tweet

Thanks for being there;
We need your help. The SpaceDaily news network continues to grow but revenues have never been harder to maintain.

With the rise of Ad Blockers, and Facebook - our traditional revenue sources via quality network advertising continues to decline. And unlike so many other news sites, we don't have a paywall - with those annoying usernames and passwords.

Our news coverage takes time and effort to publish 365 days a year.

If you find our news sites informative and useful then please consider becoming a regular supporter or for now make a one off contribution.

SpaceDaily Monthly Supporter
$5+ Billed Monthly

SpaceDaily Contributor
$5 Billed Once

credit card or paypal



IRON AND ICE
After asteroid collision, Europe's Hera will probe 'crime scene'
Paris (AFP) Sept 23, 2022
After NASA deliberately smashes a car-sized spacecraft into an asteroid next week, it will be up to the European Space Agency's Hera mission to investigate the "crime scene" and uncover the secrets of these potentially devastating space rocks. NASA's Double Asteroid Redirection Test (DART) aims to collide with the asteroid moonlet Dimorphos on Monday night, hoping to slightly alter its trajectory - the first time such an operation has been attempted. While Dimorphos is 11 million kilometres (6. ... read more


Read more from original source...

You must login to post a comment.
Loading comment... The comment will be refreshed after 00:00.

Be the first to comment.