主题：Lateral viscosity variations constrained by geodynamic data and the amplitude of dynamic topography

主讲：杨亭

介绍：research fellow ，School of Earth Sciences, University of Melbourne

时间：11月23日 15:00

地点：朱共山楼  A125

摘要： Although the surface topography is mainly induced by density heterogeneity within the lithosphere, dynamic topography also plays an important role in the continental sedimentation and erosion history, gravitational fields, and global and regional sea levels. However, the amplitude of dynamic topography is still under debate. Lateral viscosity variations (LVV) in the mantle influence geodynamic processes and their surface expressions, including dynamic topography and gravitational fields. However, LVV is still poorly constrained. We first invert for depth- and temperature-dependent and tectonically regionalized mantle viscosity…