Dr. Shenghua Mei [Institute of Deep Sea Science and Engineering, Chinese Academy of Sciences]
Title: Experimental study on mantle rheology
Time: 10:00 - 11:00 AM, Friday, May 14, 2021Place: Conference room A417, HPSTAR (Beijing)
Tencent meeting: https://meeting.tencent.com/s/3aqMy7S4KY9n , Meeting ID: 418 162 521
Host: Qingyang Hu
Abstract:
There is water in mantle rocks, which in turn affects mantle rocks. Under the extreme conditions of mantle temperature
and pressure, even if there is a trace of water, it will have a strong impact on the physical, chemical and mechanical
properties of mantle rocks. By carrying out experimental study, the effects of water on the rheological properties of
the main constituent minerals of the mantle(such as olivine, enstatite, and garnet) have been systematically investigated;
which provide the necessary experimental constraints for defining the rheological properties of the mantle.
Biography of the Speaker:
Shenghua Mei, PhDInstitute of Deep Sea Science andEngineering, Chinese Academy of Sciences Address:
Luhuitou Rd 28, Sanya 572000,Hainan Province, P. R. China
Tel: 0898-88210277 Email: mei@idsse.ac.cn
Biography of the Speaker:
My research focuses on physical and chemical behavior of minerals and rocks at high pressures and temperatures,
with particular emphasis on kinetic properties. In specific, we investigate the influence of thermodynamic parameters
(e.g., pressure and temperature) and chemical environment (e.g., water and melt) on the rheological properties of
mantle rocks. Motivation for our experiments derives from the importance of quantifying the behavior of geological
materials under extreme conditions as the basis for understanding and modeling the dynamical behavior and
chemical evolution of deep interiors of terrestrial planets.
Published more than 70 articles (omitted);
A number of innovative achievements have been made in high temperature rheology, low temperature plasticity,
melting effect, element diffusion and so on; in the field of mineral physics and chemistry.
Through the experimental study, a series of flow laws of mantle minerals have been established;
which are widely used in the field of geodynamics (a single work has been cited more than 1000 times).
Our research work provides sufficient experimental constraints for understanding the dynamic processes occurring
within the earth’s interior.