PhD Students

Sedimentology, Stable Isotope Geochemistry, Carbon Cycle, Marine Geology, Paleoclimatology and Paleoceanography

I am currently working on deep marine sediments to understand what impact climate changes (especially through Eocene) had on ocean floor sedimentation. My other interest is to tie up these deep ocean sedimentary dynamics with changes in deposition pattern in shallow marine setting in times of extreme warmth, like PETM and early Eocene Hyperthermals.

jsborchartd2@gmail.com

seismology, near-surface geophysics

Maximum likelihood framework time-domain full-waveform inversion
Variable grid traveltime and waveform inversion

Experimental Petrology, Geochemistry, Igneous processes, sulfur in subduction zone

I am interested in Earth's deep sulfur cycle, the fate of sulfur at subduction zones and deep mantle processes that constrain the stability and mobility of sulfur and it's phases in our planet.

Seismology, Geophysical inverse problems

Geomorphology, Sedimentology, Stratigraphy

The broad aim of my scientific research is exploring sediment transport processes and channel dynamics in rivers and deltas by coupling field observations and measurements with existing theories in geomorphology.

Experimental Petrology, Geochemistry, Planetary Sciences

Physical Volcanology, Multiphase Flow, Computational Fluid Dynamics, Fluid Flow in Porous Media

seismology, machine learning

Clumped isotopes of O2
Ocean science
Primary production
O2/Ar

Project1:
Kinetic isotope effects for O2 air-water gas transfer and implications for estimating marine gross oxygen productivity and clumped isotope signature during gas transfer.
Measured the first time triple oxygen kinetic fractionation factors and kinetic fractionation signals for clumped O2 like 36O2 and 35O2. We tried to apply the factors to calibrate the kinetic effects happened on the surface ocean in order to better estimate the GOP (Gross oxygen production) of the surface ocean.
Project2: The potential impact of bubble injection of air to the estimate of net oxygen production (NOP) in the surface ocean

sediment transport, geomorphology, stratigraphy, bedforms

Coupled surface/interior processes of planets within and external to our solar system. Numerical and physical modeling of convective processes -- planetary to magma chamber scale -- occurring in planetary bodies.

geophysics, modeling

Geophysics, Mantle dynamics

Seismology, Geophysics

I am exploiting and developing works in mathematics (inverse theory, optimization, numerical linear algebra) and computer science (massively parallel algorithms, computational geometry) for geophysical applications from regional to planetary scales.

pyrogenic organic carbon, atmospheric chemistry, biosphere-atmosphere-climate interactions

Stable isotope geochemistry, chemical oceanography, biogeochemistry, geomicrobiology.

I am interested in developing novel clumped isotope tracers to help understand biogeochemical cycling in the past and the present. I aim to apply stable isotope techniques to better characterize microbial processes in the surface and deep ocean.

Structural Geology; Reservoir Characterization; Well logging; Discrete Element Method; Geomechanics

Numerical Simulations of Forearc Deformation and Stress Switching

Tectonics, Tectonophysics, Paleomagnetism