RRS James Cook JC152
Cruise summary report
| Cruise Info. | |||||||||||||
| Ship name (ship code) | RRS James Cook (740H) | ||||||||||||
| Cruise identifier | JC152 | ||||||||||||
| Cruise period | 2017-08-25 — 2017-09-12 | ||||||||||||
| Status | Completed | ||||||||||||
| Port of departure | Southampton, United Kingdom | ||||||||||||
| Port of return | Leith, United Kingdom | ||||||||||||
| Purpose | Research | ||||||||||||
| Objectives | Cruise JC152 collected the major data sets for the CHIMNEY (Characterisation of major overburden leakage pathways above sub-seafloor CO2 storage reservoirs in the North Sea) NERC highlights research programme. The cruise investigated the Scanner and Challenger pock marks in the North Sea, which were previously known to be the locations of vigorous Methane venting. The cruise objectives were to collect data that could be used to constrain the geometry and internal structures of fluid flow "Chimney" structures with the eventual aim of determining the current permeability of the sub-surface. The cruise successfully completed two anisotropy experiments over the Scanner and Challenger pock marks by shooting various seismic sources into a grid of 25 and 7 ocean bottom seismometers respectively. Five different seismic sources (Bolt airguns, GI guns, Squid surface sparker, Duraspark surface sparker, and Deep Tow Sparker) were recorded by the ocean bottom seismometers, and an acoustic recorder deployed c. 25 m above the seabed. Multichannel seismic reflection profiles were collected with GI guns and both surface sparker sources, and single channel seismic reflection profiles were collected with the Deep Tow Sparker source. Single and multichannel echo sounder data were collected along all seismic profiles. | ||||||||||||
| Chief scientist | Jonathan M Bull (National Oceanography Centre, Southampton) | ||||||||||||
| Project | CHIMNEY | ||||||||||||
| Coordinating body | Natural Environment Research Council (NERC) | ||||||||||||
| Cruise report |  (7.11 MB) | ||||||||||||
| Ocean/sea areas | |||||||||||||
| General | North Sea | ||||||||||||
| Specific | Northern North Sea | ||||||||||||
| Track charts | (0.33 MB) | ||||||||||||
| Measurements | |||||||||||||
| Physical oceanography | |||||||||||||
| Other physical oceanographic measurements | Quantity: number of stations = 4 Description: Sound velocity/temperature versus depth | ||||||||||||
| Geology and geophysics | |||||||||||||
| Geophysical measurements made at depth | Quantity: number of stations = 2 Description: Broadband hydrophone deployments in the water column. Passive recordings. | ||||||||||||
| Single-beam echosounding | Quantity: activity duration in days = 14 Description: Single beam echo sounding along all tracks | ||||||||||||
| Multi-beam echosounding | Quantity: activity duration in days = 14 Description: Swath bathymetry along all tracks | ||||||||||||
| Single channel seismic reflection | Quantity: activity duration in days = 1 Description: Deep Tow Sparker Single Channel Seismic Reflection profiling | ||||||||||||
| Multichannel seismic reflection | Quantity: activity duration in days = 10 Description: Multichannel seismic reflection profiling with GI guns or surface sparkers | ||||||||||||
| Seismic refraction | Quantity: number of stations = 32 Description: Ocean Bottom Seismometer Deployments (OBIC) | ||||||||||||
| Seismic refraction | Quantity: activity duration in days = 11 Description: Seismic Refraction into OBS | ||||||||||||
| Data held at BODC | Get data | ||||||||||||
| Series/Profiles | |||||||||||||
| 2 Multi-beam echosounder | Reference numbers Horizontal spatial co-ordinates Bathymetry and Elevation
|
