Carbon is the fourth most abundant element in the solar system. It is indeed a life-saving element, but can be a life destructing element as well! Carbon geochemical cycle have implications on the origin and evolution of life, and control the Earth’s surface environment. I use carbon stable isotopes as a tool to understand the global carbon geodynamic cycle.
My attempt here is to relate the processes of isotope exchange in natural systems and compare it with experiments. To understand the link between Earth’s interior and surface processes that controlled the chemical evolution of Earth, and to model the material circulation, especially in the early stages, during which the Earth was “hot” and “dynamic”.
Our knowledge on Gondwana supercontinent formation and evolution is limited because of lack of information about Antarctica. Participating in the Japanese Antarctic Research Expedition twice (JARE-46 & 51), we try to bring in to light the hidden bed rocks that can refine the models of formation of Gondwana and earlier supercontinents.
In this topic I try to unfold the mysterious relation between global tectonic events and environmental changes. The case studies I am pursuing now are the “Cambrian Explosion” during the Late Neoproterozoic-Cambrian (~650-500 Ma) and the “Great Oxidation Event” in the Archean-Proterozoic boundary (3.0 to 2.5 Ga).