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What Is The Development Of Metal Stable Isotopes?

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My research interest primarily involves the application of metal (e.g., Ca, Mg, Sr, Fe and Cu) and non-metal (e.g., S) isotopes in understanding biogeochemical cycles of elements in modern environment as well as in the geologic past. Moreover, I am also interested in the development of metal stable isotopes as geochemical proxies to reconstruct the paleoclimatic and paleoceanographic conditions. Ongoing (Post-doctoral) research Projects I am working primarily as an experimental and analytical geochemist. My research involves multiple projects to investigate stable isotope fractionation of Fe, Mg, and S during mineral precipitation and mineral-fluid exchange at low temperature under both biogenic and abiogenic conditions. Following are …show more content…

In the soil, ferrihydrite is a common mineral that co-occurs with organic carbon. Ferrihydrite is also known to exchange with aqueous Fe(II) and transform into more stable Fe-oxide phases at low temperature.Therefore, understanding the role of organic carbon in the long-term stability of ferrihydrite and in the fractionation of Fe isotopes due to low temperature mineral-fluid exchange is critical to evaluate the preservation potential of the Fe isotopic composition of ferrihydrite in the soil. Previous research projects on isotope geochemistry 1. Doctoral research In my Ph.D. dissertation, I explored the influence of diagenesis of deep marine carbonates using Ca, Mg, and Sr isotopes and evaluated the potential of marine carbonate δ26Mg in preserving ambient seawater δ26Mg under different diagenetic regime with variable extent of reactive-transport processes (i.e., advection, diffusion, and reaction). For this purpose, I analyzed trace elemental (e.g., Mg/Ca and Sr/Ca) and isotopic compositions (δ26Mg, δ44/40Ca, and 87Sr/86Sr) of numerous pore fluids and bulk carbonates from multiple deep marine sedimentary sections using a Quadrupole ICP-MS and a Neptune Plus MC-ICP-MS respectively. I employed multiple reactive transport modeling techniques (1-D depositional model coded in R, CrunchFlow, and PHREEQC) to constrain the calcite recrystallization rates,

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