The group of Deep Time Geochemistry developed organic and inorganic geochemical proxies for paleo-environments and their applications to reconstruct the paleo-oceanic environment of key history periods and events (e.g., Permian-Triassic mass extinction event). 

The organic geochemistry team focus on aryl carotenoid biomarkers and make several groundbreaking discoveries. These include: Photosynthetic green sulfur bacteria did not possess the complete reductive tricarboxylic acid (rTCA) cycle for carbon fixation during the Paleoproterozoic era; a sharp rise in ancient seawater sulfate levels during the Ediacaran-Cambrian transition is detected, aligning with the idea of a second major oxygenation event in the Neoproterozoic; the first carbon isotope shift at the end of the Triassic, suggesting that local environmental changes might have created a misleading carbon isotope signal; the South Atlantic's expansion and the shift from a lake to a sea during the Early Cretaceous were tracked.

In the field of inorganic geochemistry, calibrate trace metals and their isotopes as proxies for various biogeochemical processes in oceans and redox conditions. These include: exploring the effect of biomineralization on trace elements geochemistry in corals and their ability to record ancient deep-sea environments; developing and calibrating trace metal (U, Mo, V, Tl, and Re) isotopes as proxies for reconstructing oceanic redox conditions; applying trace metal isotopes to refine the redox history of the Earth.