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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 British Geological Survey (BGS) marine geophysical and sampling survey took place in January 1973 in the Firth of Forth on board the Minto. Seabed samples were collected using Shipek grab and Gravity corer. Subsurface data were gathered trialling Pinger and Sparker instruments. These data are archived by BGS.

  • This marine geophysical survey took place in January 2010 in Loch Linnhe on board the RV Calanus. The survey was carried out by the British Geological Survey (BGS) in collaboration with the Scottish Association for Marine Science (SAMS). A series of short (1.7 - 18km) survey profiles were acquired from Loch Linnhe to provide a better understanding of glacial features observed during a multibeam echosounder survey in February 2009. Sub-seabed seismic profiling data were collected using a Applied Acoustics Surface Tow Boomer. These data are archived by BGS. Paper records were also generated and these are held by SAMS. Technical details of the survey are contained in BGS Commissioned Report CR/10/046 (http://nora.nerc.ac.uk/id/eprint/528419/). GeoIndex Offshore - https://mapapps2.bgs.ac.uk/geoindex_offshore/home.html?cruise=2010_1_SAMS&.

  • This British Geological Survey (BGS) marine sampling and geophysical survey took place from the May to June 1975 in the North Sea on board the RRS John Murray. Sub-bottom seismic profiling data were collected using Pinger and Sparker. Sample data were collected using dredge, gravity corer and shipek grab. These records are archived by BGS. No cruise report available.

  • This marine geophysical survey took place in August 2000 on board the RV Hakon Mosby on the AFEN slide, Shetlands margin area. This was a joint contribution of the University of Bergen and the British Geological Survey to the EU COSTA (Continental Slope Stability) project. The main objective of the COSTA project is the assessment of continental slope stability along the European Continental Margin with respect to natural processes and human activity. Subsurface seismic data was collected using BGS Deep-tow boomer and Halliburton sleeve gun system. Technical details of the survey are contained in University of Bergen report 100-02/00 (BGS2000/074).

  • This geophysical and sampling survey has been carried out by Institute of Geological Sciences now British Geological Survey (BGS) for BGS, the survey took place in September 1975 mainly in the area of Haig Fras on board the MV Gardline Locator. Shallow geophysical surey work took place at night with sampling operations during the day.The purpose was to collect data as part of the UK regional mapping programme. Sub-bottom profiling data were collected using pinger and sparker. Sea-bed samples were collected using a gravity corer and shipek grab. These data are archived by BGS. No BGS survey report currently available, IGS 1975 annual report contains summary..

  • 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 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 British Geological Survey (BGS) marine geophysical survey took place during October/November 2003 in the Outer Bristol Channel aboard the RV Prince Madog. Netsurvey Ltd were commissioned to provide multibeam services. This survey was undertaken for the Outer Bristol Channel Marine Habitat Study (OBCMHS) as part of a series of five surveys. The OBCMHS was principally funded by the Aggregate Levy Sustainability Fund, MALSF, (administered in Wales by the Welsh Assembly Government), the Sustainable Land Won and Marine Dredged Aggregate Minerals Programme of the Office of the Deputy Prime Minister (ODPM), administered by Mineral Industry Research Organisation (MIRO), with contributions from others. Sea floor data collected were high-resolution multibeam bathymetry and side-scan sonar (on selected lines). Subsurface data were gathered using a surface tow boomer (on selected lines). The multibeam data collected on this survey were later merged with data from the 2004 survey and this combined dataset is available with the 2004 survey. Most of the data were recorded digitally. Some paper records were also generated also. These data are archived with the MEDIN Data Archive Centres (DAC), including the BGS DAC for geology and geophysics and the UKHO DAC for bathymetry data. Technical details of the survey are contained in BGS Cruise report IR/04/012 (http://nora.nerc.ac.uk/id/eprint/509269/) and BGS Cruise report IR/05/082 (http://nora.nerc.ac.uk/id/eprint/11121/). For further information on the surveys and general information on the OBCMHS see the final report (Mackie et al, 2006. BIOMOR Reports 4:ISBN 0-7200-0569-8).

  • This marine geophysical survey took place on 1st October 2014 in the area of Ardmucknish Bay on board the RV White Ribbon. The survey was carried out by the British Geological Survey (BGS). This was a follow up survey to the previous work carried out in this area (Surveys: 2011/4 and 2012/5, 2012/7) to monitor changes in the geometry of gas charged sediments. 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. 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/. NERC grant NE/H013954/1.