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Two-dimensional seismic reflection

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    This dataset includes two cruises of data collected to investigate Arctic hydrate dissociation as a consequence of climate change and to determine vulnerable methane reservoir and gas escape mechanisms. Work during both JR269A and JR269B was focused on two separate geographical areas. The first of these was west of Prins Karls Forland, in water depths of between 150 and 1200 m. At its landward end, this survey area crosses a region at water depths up to 400 m where a dense concentration of methane escape bubble plumes occur. The second survey area straddles the summit of the Vestnesa Ridge, in water depths of 1180 to 1400 m, and is also the site of methane escape bubble plumes within the water column and of fluid escape chimneys and pockmarks previously imaged at and beneath the sea bed. This area lies approximately 100 km west of the mouth of Kongsfjorden. Data collection took place between August 2011 and July 2012. The research expedition used a deep-towed, very high resolution seismic system to image the small-scale structures that convey gas to the seabed and to detect the presence of gas in the sediments. This was done in conjunction with an electromagnetic exploration system that uses a deep-towed transmitter and receivers on the seabed to derive the variations in electrical resistivity in the sediments beneath the seabed. The observations carried out on the two cruises included; underway, meteorological observations and echo sounder data, multichannel seismic reflection profiling data, wide angle seismic survey data, and ocean bottom seismometer (OBS) data, ocean bottom electro-magnetometer data and controlled source electromagnetic surveys (CSEM). The overall objectives of the project were to determine the spatial distribution of gas and hydrate accumulations beneath the sea bed; to investigate and understand gas transport and escape mechanisms, their spatial distribution, and the controls on these; and to quantify gas and hydrate saturation values in situ within the pore spaces of the shallow sediment reservoirs. The research is focused on specific areas where significant accumulations of methane hydrate and active methane venting through the sea floor were observed and documented during the earlier JR211 cruise in 2008. This is a NERC funded project hosted by University of Southampton. The data held at BODC include multichannel seismic reflection, TOPAS sub-bottom profiler and 2D seismic reflection data in SEG-Y format. No further data are expected.

  • This marine geophysical survey took place in March 2009 in Loch Fitty in Fife aboard the small outboard powered 'Tuppence' provided by ACS Coring Services. This survey was carried out by the British Geological Survey (BGS) as part of a study commissioned by Scottish Coal to ascertain the depth of sediment covering the coal seams beneath Loch Fitty. BGS personnel were also involved in the operation. Subsurface seismic data were gathered using a Surface Tow Boomer. Most of the data were recorded digitally, but paper records were generated also. These data are archived by BGS. Technical details of the survey are contained in BGS Internal Report CR/09/014.

  • This sampling and geophysical survey has been carried out by University of Bergen in collaboration with British Geological Survey (BGS), the survey took place in July 1996 on the North Sea Margin (North Sea Fan; Miller Slide and Faeroe-Shetland Channel) on board the RV Hakon Mosby. The purpose was to collect data as a contribution to the Europen Union’s project “European North Atlantic Margin (ENAM II): Quantification and modelling of large-scale sedimentary processes and fluxes” program. Sea floor data were collected using echo sounder. Sub-bottom profiling data were collected using airgun and deep tow boomer. Sample data were collected using gravity corer. These data are archived by University of Bergen, copy seismic records archived by BGS. Technical details of the survey are contained in University of Bergen ENAM II cruise report No. 2 (Non-BGS report reference 2006/9).

  • This geophysical survey has been undertaken by University College of North Wales (UCNW) for Natural Environment Research Council (NERC), the survey took place in March 1993 in the Humber flats and marches on board the MV Petroswift. The purpose was to collect data as part of the NERC Land-Ocean Interaction Study (LOIS). British Geological Survey were a participant in the study. Sub-bottom profiling data were collected using surface tow boomer. Navigation positioning Trisponder system. These data are archived by UCNW. Survey details are contained in University College of North Wales report “Geophysical studies in the Humber and Tees Estuaries and the Fenland/Wash area by A. M. Davies, J. D. Bennel, J. Butcher, C. Hartfall, I. Richarson and B. Williams”. NERC contract F60/G12/15.

  • This British Geological Survey (BGS) marine geophysical and sampling survey took place in March 2007 in the Firth of Clyde between Holy Loch and Greenock aboard the RV Arora. The purpose was to gather data which could be used for Estuarine Contaminant analysis. Seabed samples were collected with gravity and Craib corers. Sub-surface seismic data were gathered using a surface tow boomer. Most of the data were recorded digitally. Multibeam data was collected on Cruise 2007/4. These data are archived by BGS. Technical details of the survey are contained in BGS Internal Report IR/08/039.

  • Wessex Archaeology was commissioned by English Heritage to undertake a project entitled ‘Wrecks on the Seabed: Assessment, Evaluation and Recording’. The project was supported by that part of the Aggregate Levy Sustainability Fund (ALSF) distributed by English Heritage. The specific aim of this project was to provide industry, regulators and contractors with guidance on the archaeological assessment, evaluation and recording of wreck sites. ‘Assessment, evaluation and recording’ are taken to include various methods of archaeological investigation that are intended to improve the understanding, preservation and appreciation of the historic environment. The term ‘wreck site’ is taken to include the remains on the seabed of both watercraft and aircraft. As part of a variation of this project Wessex Archaeology was commissioned by English Heritage to undertake a geophysical survey of four designated historic wrecks (A1 submarine, Hazardous, Invincible and Mary Rose) which focussed on the development and testing of methodology for rapid in situ recording using geophysical techniques. The geophysical survey included the use of multibeam echosounder, magnetometer and sub bottom profiler. The survey was undertaken from the 12.5 m Aquastar survey vessel Emu Surveyor belonging to Emu Ltd between 11th and 26th June 2003. The geology and geophysics component of the data are archived at British Geological Survey (BGS) MEDIN Data Archive Centre (DAC) for Geology and Geophysics. Data were also provided to other archive centres as appropriate.

  • This British Geological Survey (BGS) marine geophysical and multibeam survey took place in January/Febuary 2012 in the area of the Moray Firth on board the RV White Ribbon. The purpose was to enable BGS to reconstruct the glacial history of the areas and place it in the wider context of the dynamics of the British Ice Sheet. Sea floor bathymetry data were collected using a Kongsberg EM3002D multibeam system. Sub bottom seismic profiling data were collected using an Applied Acoustics surface tow boomer (STB). These data are archived by BGS.

  • This British Geological Survey (BGS) marine geophysical and multibeam survey took place in June 2012 in the area of Ardmucknish Bay on board the RV White Ribbon. This was a follow up survey to the previous work carried out in this area (2011/4 and 2012/5). QICS (Quantifying and monitoring potential ecosystem impacts of geological carbon storage) was a scientific research project funded by NERC; its purpose was to improve the understanding of the sensitivities of the UK marine environment to a potential leak from a carbon capture storage (CCS) system. Sea floor bathymetry data were collected using a Kongsberg EM3002D multibeam system. Sub bottom seismic profiling data were collected using an Applied Acoustics surface tow boomer (STB). These data are archived by BGS. Webpage www.bgs.ac.uk/QICS/.

  • This geophysical and sampling survey has been undertaken by University College of North Wales (UCNW) for Natural Environment Research Council (NERC), the survey took place in June 1993 in The Wash on board the MV Petroswift. The purpose was to collect data as part of the NERC Land-Ocean Interaction Study (LOIS). British Geological Survey were a participant in the study. Sea floor data were collected using echo sounder. Sub-bottom profiling data were collected using surface tow boomer. Sample data were collected using mini Van Veen Grab Sampler. Navigation positioning Trisponder system. These data are archived by UCNW. Survey details are contained in University College of North Wales report “Geophysical studies in the Humber and Tees Estuaries and the Fenland/Wash area by A. M. Davies, J. D. Bennel, J. Butcher, C. Hartfall, I. Richarson and B. Williams”. NERC contract F60/G12/15.

  • This National Oceanography Centre (NOC) marine geophysical and multibeam survey took place in May/June 2011 on board the RRS James Cook. This data is a subset from the survey collected as a MAREMAP initiative at BGS request over BGS borehole BH78/4. Sea floor data bathymetry were collected using EM710 and sub bottom seismic profiling data were gathered using a SBP120. Other data from the survey are held at NOC. Survey details contained in NOC cruise report No. 4. The cruise was related to and supported by the NERC MAREMAP programme, the EC FP7 IP HERMIONE (grant agreement 226354) and the ERC Starting Grant project CODEMAP (ERC Grant 258482). Additional funding to support ROV work was obtained from the Joint Nature Conservation Committee (JNCC) and the Lenfest Ocean Program/PEW Foundation. Any published material resulting from these data (Stornoway Bay) must include in the acknowledgements text acknowledging the acquisition cruise, its funding streams and chief scientist (V A I Huvenne).