Dr. Jie Li | 李洁[University of Michigan, USA] @ Beijing

Title: Melting behavior of carbonates with implications for Earth's deep carbon cycle

Time: 10:00 - 11:00 AM, Friday, June 9, 2017

Place: Conference Room C206, HPSTAR (Beijing)

Host: Dr. Jiuhua Chen

Abstract

Melting of carbonated eclogite or peridotite in the mantle influences the Earth’s deep volatile cycles and bears on the long-term evolution of the atmosphere. In this talk I will show experimental data on the melting curves of calcium and sodium carbonates (CaCO3 and Na2CO3) to the pressures of the mantle transition zone using an in situ ionic conductivity method and a multi-anvil apparatus. The results suggest pressure-induced density crossovers between solid and liquid CaCO3, which are supported by ab initio simulations. The melting curves of calcium and sodium carbonates overlap with the estimated ocean-island geotherm at transition zone pressures, indicating that carbonatitic melt is readily generated from multicomponent carbonate systems in the transition zone. Melting of carbonates may therefore pose a barrier to carbon subduction into the lower mantle.

Biography of the Speaker

Prof. Jie Li (李洁) is a well established mineral physicist in US. She was trained as a large volume press experimentalist during her PhD study at Harvard University and quickly extended her expertise in diamond anvil cell research as well.  She is widely recognized for her work on composition of Earth’s core and deep carbon cycling.

B.S. University of Science and Technology of China (Geochemistry)

M.A. Harvard University (Geophysics)

Ph.D. Harvard University (Earth and Planetary Sciences)

2010-Professor, Associate Professor, Dept. Earth & Environmental Sci., University of Michigan

2003-2009, Associate, Assistant Professor, Dept. of Geology, University of Illinois

2000-2003, Postdoctoral Associate, Geophysical Laboratory, Carnegie Institution for Science

1998-2000, Gilbert Postdoctoral Fellow, Carnegie Institution for Science

1996-1997, Resident Tutor, Winthrop House, Harvard University

2018, Blaustein Visiting Professor, Stanford University

2013, Kavli Fellow, National Academy of Sciences

2013, Short-Stay Visitor, Institute of Advanced Studies, University of Western Australia

2012, Japan Global Center of Excellence Scholar

2012, Tharp Fellow, Columbia University

2010, Fellow, Mineralogical Society of America

2009-2010, COMPRES Distinguished Lecturer

2009-2010, Center for Advanced Study Fellow, U. Illinois

2009-2010, Helen Corley Petit Scholar, U. Illinois