Photo credit: NASA / JPL-Caltech

Abstract:
Our understanding of the early solar system and Mars via meteoritic triple oxygen isotope records is rooted in the chemical physics origin of Δ17O anomalies. Several proposed mechanisms are ranging from the original nucleosynthesis, transfer of anomalous oxygen from ozone, self-shielding, to the bond formation process that occurs during the actual formation of molecules due to experimentally and theoretically determined symmetry dependent reactions. In this talk, these processes will be reviewed, and uncertainties in current self-shielding models will be discussed. We further propose a new concept model (Chemical Mechanism Model) for production of meteorite oxygen isotopic anomalies and the origin of the solar system. There are some chemical processes that are not well understood and need further investigation. A set of experiments have been carried out in ELSI to evaluate one of these previously underappreciated processes. The preliminary results with implications towards understanding the early solar system and Mars will be discussed, and the collaboration work with ELSI colleagues will be continued.

Photo credit: Arvin Akoopie

Speaker: Dr. Mang Lin (State Key Laboratory of Isotope Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences)
 
Speaker bio: Mang Lin is a research professor of isotope geochemistry at the Guangzhou Institute of Geochemistry, Chinese Academy of Sciences. Before his current appointment, he worked with Mark Thiemens at UC San Diego as a PhD research fellow and Naohiro Yoshida at Tokyo Tech as a JSPS postdoctoral fellow. His current research focuses on mass independent isotope effects and their applications in understanding the origin of the solar system and relevant planetary processes.

ELSI Host: Tony Jia

Date: June 5, 15:30-16-30 JST
 
Venue: Online