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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 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.

  • The British Geological Survey (BGS) were invited to participate in an Arts & Science cruise organised by the Cape Farewell charity, and carried out a geophysical survey in September - October 2008 in the Disko Bugt area of Western Greenland, on board the Grigory Mikheev. The purpose was to obtain sub-bottom profiles across modern active and ancient glacial features, to investigate the sequence stratigraphy laid down by large ice streams during the last glacial, and more modern sedimentary processes active in the interglacial. Sub bottom seismic profiling data were gathered by BGS using a surface tow Sparker. 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 IR/08/077.

  • This marine geophysical and multibeam survey was undertaken in July/August 2012 off south-west Tiree by the British Geological Survey (BGS) on behalf of Marine Scotland on board the Northern Lighthouse Board vessel NLV Polestar. Sea floor bathymetry data were collected using a Kongsberg EM3002D multibeam system. Sub bottom seismic profiling data were collected using a surface tow boomer. The data are archived by BGS and are also available on Marine Scotland Interactive (MSI) - http://www.gov.scot/Topics/marine/science/MSInteractive/Themes/Renewables/Data. Multibeam bathymetry data are available from the UKHO Bathy DAC, https://www.gov.uk/guidance/inspire-portal-and-medin-bathymetry-data-archive-centre. Backscatter data are available from the backscatter layers in the BGS Offshore GeoIndex. Technical details of the survey are contained in BGS Report of Survey CR/12/099, https://nora.nerc.ac.uk/id/eprint/529501/. GeoIndex Offshore - https://mapapps2.bgs.ac.uk/geoindex_offshore/home.html?cruise=2012/9_MS&.

  • This marine multi-channel geophysical survey commissioned by the British Geological Survey (BGS), acquired by Delta Exploration Inc. and processed by Seiscom Ltd took place October 1972 and July 1973 in the Moray Firth aboard m.v. Caribe Tide. The survey was carried out as part of a regional mapping programme. Data were gathered using the following equipment Navigation: SAT/NAV; Subsurface data were gathered using a gas/airgun (sleeve exploder), 640 km were covered in a grid of 14 lines. These data are archived by BGS. Technical details of the survey are contained in an Acquisition Report (SO/90/029). Seismic Interpretation Training Package, IGS reports 74/12; 75/11 and BGS Techincal Report WB/92/37 includes data from this survey.

  • This marine geophysical survey took place from 05/07/92 – 06/07/92 in the area of the Barra Fan on board the RV Kommandor Michael. The survey was carried out by the British Geological Survey (BGS), Marine Biological Association and Dunstaffnage Marine Laboratory. The aim of the survey was to investigate the source and fate of methane in marine sediments. Sub bottom seismic profiling data were collected using a Deep Tow Boomer. These data are archived by BGS. Technical details are contained in BGS Report WB/92/27. Report: Dobinson, A. 1992. Barra Fan Project: Geophysical Operations Report - Project 92/02, https://nora.nerc.ac.uk/id/eprint/529922/. GeoIndex Offshore - https://mapapps2.bgs.ac.uk/geoindex_offshore/home.html?cruise=1992/2&.

  • 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.

  • 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 survey took place in July 2013 approx 15km east of the island of Mingulay on board the RV Calanus. The purpose was to obtain seismic profiles across the coral mounds of the Mingulay Coldwater Coral Reef. An additional line was collected in Sound of Mull as a test. It has provided useful information on a submarine landslide. Sub bottom seismic profiling data were gathered by BGS using an Applied Acoustics surface tow boomer (S-Boom). These data are archived by BGS. Technical details of the survey are contained in BGS Report OR/13/033. GeoIndex Offshore - https://mapapps2.bgs.ac.uk/geoindex_offshore/home.html?cruise=2013/7&.

  • This geophysical survey has been carried out by, British Geological Survey (BGS), the survey took place from 1 to 8 November 1993 in the Storegga Slide area, off Norway on board the RV Meteor. These purpose was to collect data as part of their contribution to the ENAM programme,. Sub-bottom profiling data were collected using Deep Tow Boomer. These data were recorded digitally SEGY and are archived by BGS. Technical details of the survey are contained in BGS report WB/93/38. Report: Evans, D, Brett, CP and Wallis, D. 1993. Meteor 26/3 Cruise Report: Operations and Interpretation of BGS Deep-Tow Boomer Profiles in the Storegga Slide: An ENAM Project, https://nerc.on.worldcat.org/search?queryString=no%3A+703948795#/oclc/703948795