Longjian
XieHe/His
Longjian Xie is a mineral physicist who specializes in investigating the melt properties under high pressure. The properties of deep melts control the chemical and thermal evolution of Earth from the early to present Earth.
Overview
During his fellowship, Xie is working to develop the technique to extend the pressure range of density measurement of melts by X-ray absorption method to 20 GPa and measure the density of hydrous silicate melts under the conditions of 410 km low-velocity layer (~13.5 GPa.). This study will help to constrain the nature of 410 km low-velocity layer.
Prior to joining the Earth and Planets Laboratory, Xie completed his Ph.D. at the Institute for Planetary Materials, Okayama University. He received the “Student Outstanding Presentation Award of 2018 JPGU”, “2018 Dean’s Scientific Award of Okayama University”, and “SPRUC2020 Young Scientist Award of SPRUC Users Community” for his excellent work in developing the boron-doped diamond heater in multi-anvil apparatus and its application in viscosity measurement of silicate melts to lower mantle conditions (to 30 GPa, 3000 ºC).
From 2018, he joined Bayerisches Geoinstitut as a postdoctoral researcher. He further developed practical form of boron-doped diamond as a routine heater in multi-anvil press and succeeded in generating ultrahigh P (~50 GPa) and T (~3000 ºC) simultaneously in multi-anvil press by combing boron-doped diamond heater and sintered diamond anvils.
CV
- 2018: Ph.D., Geophysics, Institute for Planetary Materials, Okayama University, Japan
- Thesis title: “Viscosity measurement of silicate melt at lower mantle conditions based on developments of boron-doped diamond heater in the multi-anvil apparatus”. Supervisor: Prof. Dr. Akira Yoneda
- 2013: Master of Science, School of Earth sciences, China University of Geosciences at Wuhan, China. (leaving during the term)
- 2011: Bachelor of Science, School of Earth sciences, China University of Geosciences at Wuhan, China
- GPA is 3.79, the first rank in Department of Geochemistry. Major: Geochemistry
- SPRUC2020 Young Scientist Award, SPRUC Users Community, September 2020.
- 2018 Dean’s Scientific Award, Okayama University, September 2018.
- Student Outstanding Presentation Award, Japan Geoscience Union Meeting, May 2018.Grant for Research Fellow (DC2) from Japan Society for the Promotion of Science (JSPS).