? ? ? ? 应杜治学研究员邀请，普林斯顿大学助理教授邓杰?将于6月19日（周四）访问我所并在综合楼701会议室做学术报告，欢迎大家参加并积极讨论！

? ? ? ? 报告题目：Mantle heterogeneities originated from?the Earth’s core: A new model

? ? ?报告人简介：

邓杰，博士、普林斯顿大学助理教授。2013年本科毕业于中国地质大学（武汉），2019年于耶鲁大学获得地球科学博士学位。2019至2022年在加州大学洛杉矶分校做博士后。2022年至今在普林斯顿工作。主要研究方向包括早期地球演化，行星内部结构，机器学习与第一性原理计算，矿物物理。

? ? ? ? Abstract：? ? ?

The Earth’s lowermost mantle harbors two large low shear-wave velocity provinces with patches of ultra-low velocity zones. These structures exhibit distinct seismic and geochemical signatures compared to the surrounding mantle. Yet, their origin remains enigmatic. Here, I propose a new long-term core-mantle chemical interaction model termed basal exsolution contaminated magma ocean (BECMO) which considers the addition of oxide exsolved from the core into the basal magma ocean. As a first step, I will show that oxide exsolved from the core can selectively deliver core-like signatures, by leveraging large-scale atomistic simulations powered by cutting-edge machine learning techniques and density functional theory, as well as high-pressure experiments. I then delve into the long-term interaction of core-derived exsolution and the mantle, and present geodynamic modeling and thermodynamic modeling results of the BECMO mantle, and discuss the implications for forming deep mantle geochemical and geophysical heterogeneities of various scales.