Circulation Obviation Retrofit Kit (CORK) instruments seal the top of Integrated Ocean Drilling Program boreholes, to prevent circulation between the open hole and the ocean bottom water.
CORKs monitor subseafloor hydrology by collecting in-situ pressure and temperature measurements from the formation deep below the seafloor. Some CORKs can also be used to collect borehole fluid samples, house third party instrument packages, or collect geochemical samples with an osmotic sampler.
Data from CORKs are recorded and stored in a data logger unit. CORKs without a cabled connection have to be visited regularly with submersibles to download the data stored in the logger. For detailed description of sensors at a particular CORK, see the related IODP report.
Click the instrument categories below for descriptions and lists of instruments belonging to that category.