2nd Supervisor: Dr Rebecca Greenberger (firstname.lastname@example.org) California Institute of Technology
Global geochemical cycles are fundamental to the Earth system; where, when, and how much elements are cycled through the Earth underpins a broad range of science, including our understanding of ocean chemistry and how the oceans will be impacted by future climate change. Geochemical fluxes from deep sea hydrothermal systems, where seawater circulates and reacts through the seafloor and exits back into oceans via hydrothermal vents, are a key component of global geochemical cycles. The ocean crust preserves this fluid/rock interaction (“hydrothermal alteration”) and by analysing these crustal rocks we can estimate the hydrothermal geochemical flux. However, such studies are limited by poor core recovery by scientific ocean drilling and the time-limitations of mineralogical and geochemical studies.
The individual will (1) use micro-imaging spectroscopy datasets to define a set of hydrothermal alteration types in the drill-cores and interpret their abundance and distribution; (2) use representative samples of the different alteration types to characterise the geochemical (major and trace elements and isotopic compositions) variability, and (3) integrate the abundance of alteration types with their geochemical variability to calculate geologically robust geochemical fluxes.
The individual will develop a range of industry and academia relevant skills, with specialist training in micro-imaging spectroscopy and a range of analytical geochemistry (including XRF, ICP-MS and isotopic analysis). The successful candidate will join an international team of researchers including the broader Oman Drilling Project Science team and the ocean drilling community.
This PhD is suitable for individuals with degrees in Geology/Earth Sciences with interests in petrology, geochemistry and big-picture Earth Science questions.
This project has been shortlisted for funding by the ARIES NERC DTP and will start on 1 October 2023.
Please clearly state the name of the studentship project code HARRIS_P23ARIES that you are applying for on your personal statement.