| Timetable |
| Download Conference Program |
| Download All Abstracts |
| Zoom Access |
| Corporate Program |
Poster Presentations
Day 2, June 23（Mon.）
Room P (Maesato East, Foyer, Ocean Wing)
- 2P-AM-35
Improvement of Multi-Isotope Analytical Procedure of Extraterrestrial Materials and Its Implications for Material Transport in the Solar Protoplanetary Disk
(1Univ. of Osaka, 2UW-Madison, 3Univ. of Tokyo, 4NOAA, 5JAMSTEC, 6Okayama Univ.)
oKohei Fukuda1,2, Yuki Hibiya3, Craig Kastelle4, Katsuhiko Suzuki5, Tsuyoshi Iizuka3, Katsuyuki Yamashita6, Thomas Helser4, Noriko Kita2
Understanding the material transport and mixing processes in the protoplanetary disk provides important constraints on the origin of the chemical and isotopic diversity of our planets. Recent isotope studies of individual meteoritic components revealed the presence of materials originating from the inner Solar system in the meteorites, for which parent body accreted in the outer Solar system, giving rise to a question regarding the limited mixing between these two reservoirs, as suggested previously. To further understand the frequency and efficiency of the outward transport, high-precision multi-isotope investigations of various meteoritic components are required.
Here we improved the analytical procedure for high-precision oxygen, chromium, and titanium isotope study of individual meteoritic components by combining SIMS, ICP-MS, and TIMS. The improved procedure was applied to three chondrules from the Allende meteorite. One chondrule exhibits the correlation between chondrule petrography and isotope compositions. The olivine-rich core has inner Solar system-like oxygen and titanium but outer Solar system-like chromium isotope signatures, which are enclosed by the pyroxene igneous rim with the outer Solar system-like oxygen isotope signature. The petrographic and isotopic correlation in this chondrule is further evidence for the outward transport of the inner Solar system materials in the protoplanetary disk.