Isotope Geochemistry Postdoctoral Fellow - 95201
Organization: CH-Chemical Sciences
The Chemical Sciences Division (CSD, https://chemistry.lbl.gov/) at Lawrence Berkeley National Laboratory (LBNL, https://www.lbl.gov/) has an opening for an isotope geochemistry Postdoctoral Fellow to study stable isotopes and trace elements in amorphous and crystalline calcium carbonates, 100% synthetic.
Your research will focus on providing a fundamental understanding of the effects on the isotopic and elemental composition of carbonate minerals due to phase transitions from amorphous precursors. Specifically, we are interested in understanding how conversion of amorphous calcium carbonate (ACC) to carbonate minerals (e.g., calcite) controls the isotopic and chemical composition of the final carbonate mineral. We propose to employ isotopic tracers including δ13C, δ18O, and clumped isotopes measurements made at UC Berkeley as well as trace element ratio measurements (e.g., Sr/Ca and Mg/Ca) and calcium and strontium isotope measurements (δ44Ca and 87Sr/86Sr) made at LBNL to address this problem. The overarching goal is to (i) develop a process-based understanding of whether and, if so, why the isotopic and chemical compositions of ACC differs from the final mineral and (ii) the extent of isotope exchange reactions during the various phase transitions that turn ACC into a final mineral form.
Berkeley Lab's Energy Sciences Area (ESA) consists of the Materials Sciences Division, Chemical Sciences Division, and two national user facilities: The ALS, a synchrotron facility, and the Molecular Foundry, a nanoscience research center. This combination of leading expertise and capabilities provides a vibrant environment for collaborative, interdisciplinary science. In addition to the ESA, you will be closely connected to the UC Berkeley Earth and Planetary Science Department, and the lab's Energy Geoscience Division (EGD), both of which have long-standing expertise in isotope geochemistry. "Chemistry of CaCO3 phase transitions", an award to PI Gilbert and co-PI Stolper, is funded through the Department of Energy-BES-Geosciences program, which focuses on understanding fundamental chemistry in earth sciences. You will learn from Stolper and Gilbert methods in isotope geochemistry and spectromicroscopy. You are expected to independently conduct innovative experiments, collect, analyze, and interpret results from the above studies, and draft manuscripts for publication in peer-reviewed scientific journals.
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