UKRI-3201 New England Shelf Hydrogeology

Tender description

The British Geological Survey acting on behalf of the ECORD requires a marine coring capability and suitable vessel to operate offshore New England USA, for a scientific drilling, coring and groundwater sampling campaign for a period of 75 – 90 days (estimated) between May and August 2024. This scientific coring project seeks to extend our understanding of the current and past states of fluid composition, pressure and temperature in continental shelf environments. In many coastal settings worldwide, the distribution of freshwater within continental shelf sediments is far out of equilibrium with modern sea level. One of the most remarkable examples is found on the Atlantic continental shelf off New England where groundwater within shallow Pliocene-Pleistocene sand aquifers over 100 km offshore has low salinity (3000 mg/l or less). This project will test several hypotheses to help constrain rates directions and mechanisms of groundwater flow and chemical fluxes in continental shelf sys. Lot 1: The Contractor must be able to supply the full operational spread including a drill rig, the vessel, equipment for groundwater extraction and storage, and all personnel required to operate the spread. The drill rig must be capable of recovering core to at least 550m below seafloor in water depths of 41m to 79m. The project requires the Contractor to provide a suitable platform from which to deploy coring apparatus to achieve near-continuous core samples (min. diameter 64mm) from seabed to a total depth (TD) of 550 mbsf (meters below sea floor) at each of 3 borehole locations. Please see the Specification for full details. Additional information: The estimated Contract value is $17,000,000