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Aqueous Geochemistry

Andrew Jacobson's research in aqueous geochemistry focuses on understanding the cycling of elements and their isotopes at the Earth’s surface. Several projects examine mineral weathering and precipitation reactions that cycle carbon and other elements, link inorganic and organic aspects of the Earth system, and control the geochemistry of soils, rivers, aquifers, seawater, and the atmosphere. He also conducts laboratory scale experiments designed to elucidate fundamental aqueous geochemical phenomena, such as the kinetics of microbially mediated weathering reactions and isotope fractionation during mineral precipitation.

Matthew Hurtgen couples studies of modern and ancient Earth-surface systems to investigate the mechanisms and environmental forcings controlling the distribution of chemical species within marine, lacustrine, and terrestrial settings. In modern systems, he has focused on syngenetic (water-column) and early diagenetic cycling of carbon, sulfur, and iron in oxygen-deficient (anoxic) marine basins -including the Orca Basin (an intraslope brine pool in the northern Gulf of Mexico) and Effingham Inlet (a fjord on the west coast of Vancouver Island). Current interests include the behavior of the oxygen isotope composition of sulfate in a variety of modern environments.

Neal Blair’s research focuses on the cycling of carbon across the Earth’s surface as reflected by particulate organic C pools in streams, rivers, reservoirs, and the ocean. Stable and radio-isotopic measurements, biomarker measurements, and vibrational (FTIR) spectroscopy are used to track organic C as it moves across land surfaces and the seafloor. This lateral portion of the C-cycle is especially sensitive to anthropogenic impacts such as via land use. Field areas have included the Pacific Rim (California, Oregon, New Zealand, Taiwan, Papua New Guinea), the Midwest, and the Amazon River.

Aqueous Geochemistry Lab

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