Comparing asteroid Itokawa samples to the Tuxtuac LL5 chondrite with X-ray absorption spectroscopy

Authors: Takaaki Noguchi (Ibaraki University) , Leon Hicks (University of Leicester) , John Bridges (University of Leicester) , Steve Gurman (University of Leicester) , M Kimura (Ibaraki University, Japan)
Co-authored by industrial partner: No

Type: Conference Paper
Conference: 44th Lunar and Planetary Science Conference
Peer Reviewed: No

State: Published (Approved)
Published: February 2013

Abstract: The grains of Itokawa returned by the JAXA Hayabusa mission in 2010 showed mineralogical and isotopic affinities to LL5-6 chondrites [1,2,3]. If so, the redox state experienced by the grains in their parent body should be almost identical to that in LL5-6 chondrites. We measured the relative abundance of Fe3+ and Fe2+ ions in ferromagnesian silicates, which reflects the redox states, in grains from Itokawa and an LL chondrite. X-ray Absorption Near Edge Structure (XANES) and Extended X-ray Absorption Fine Structure (EXAFS) are an X-ray Absorption Spectroscopy (XAS) spectroscopic technique which we use to compare Itokawa to chondrite meteorite samples.

Diamond Keywords: Asteroids

Subject Areas: Earth Science

Instruments: I18-Microfocus Spectroscopy

Added On: 31/03/2013 15:17

Discipline Tags:

Earth Sciences & Environment Mineralogy Geology Planetary Geology

Technical Tags:

Spectroscopy X-ray Absorption Spectroscopy (XAS) Extended X-ray Absorption Fine Structure (EXAFS) X-ray Absorption Near Edge Structure (XANES)