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세미나 서울대학교 지구환경과학부 세미나
제목 Physical and Chemical Evolution of Earth's Deep Interior
발표자 Jung-Fu ( University of Texas at Austin ) 날짜 2019-01-17
Host SNU Place 25-1동 612호
Abstract Our planet came to what we know it today through a series of geological events over its history. Much of the information about the planet’s physical and chemical evolution had been lost along the process. In this talk, I will discuss recent high-pressure mineral physics results to reveal a number of physical and chemical properties of candidate deep-mantle and core materials to help us better understand its evolution and dynamic processes. The use of a high-pressure diamond anvil coupled with synchrotron X-ray and “pump-and-probe” laser spectroscopic techniques provides exciting opportunities to directly measure properties of deep earth materials at relevant pressure-temperature conditions of the planet. Specifically, I will show how iron spin and valence states drastically affect our understanding of thermal transport and chemical evolution, how single-crystal elasticity of candidate minerals is used to build an internally-consistent mineralogical and geotherm model, how thermal transport properties of iron are used to constrain the heat flow across the core-mantle boundary and the thermal and chemical energy sources to power the Earth's geodynamo to generate magnetic fields.

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