Radium Isotope Release from Oil Degradation: Development of an Oil Clock
Coastal Carolina University
DWH Project Funding
Known Leveraged Funding
Gulf of Mexico Research Initiative (GoMRI)
Gulf of Mexico Research Initiative GoMRI Grant Program
Hydrocarbon Seeps and Chemosynthetic Communities
This proposal is based on exciting new data demonstrating that as hydrocarbons degrade within a water parcel, radium isotopes are released into the surrounding water. The ultimate goal of this proposal is to use this characteristic to develop an 'oil clock' geochronometer of hydrocarbon residence time in the marine system based on this released radium isotopic signature. The objectives of this proposal include: (1) collect and geochemically characterize discharged hydrocarbons from natural seep vents at Green Canyon lease block 600 (GC-600) to assess the degree of hydrocarbon source homogeneity across a Gulf of Mexico lease block; (2) use these collected hydrocarbons to perform a series of time-course radium release experiments, in which natural and dispersant-influenced degradation processes under conditions simulating deep water and surface hydrocarbon plumes will be used to determine the radium isotopic release signatures; and (3) create and validate a conceptual model of hydrocarbon residence time in the marine environment based on these isotopic release signatures.