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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.

  • During the period 31 January 1977 to 15th February 1977 approximately 490km of subsurface data in UK blocks 97 and 98 (Bournemouth Bay) were acquired for The Institute of Geological Sciences (BGS) by S & A Geophysical Ltd and subsequently processed by them at their Swanley, England processing centre. survey vessel: M/V Oil Hunter.

  • This British Geological Survey (BGS) marine geophysical and multibeam survey took place in July 2005 in the Summer Isles region and Loch Broom and Little Loch Broom aboard the RV Calanus. The survey was a part of the BGS Offshore Mapping and Modelling Project, North Atlantic Correlation. Subsurface seismic data were gathered using a Surface Tow Boomer. Multibeam bathymetry data was collected using a Geoacoustics GeoSwath system supplied and operated by Fathoms Ltd. All of the data were recorded digitally, but paper records were generated also. The data are archived by BGS. Backscatter and geophysical data are available for download. Technical details of the survey are contained in BGS Report IR/05/139 (http://nora.nerc.ac.uk/id/eprint/11140/). GeoIndex Offshore - https://mapapps2.bgs.ac.uk/geoindex_offshore/home.html?cruise=2005/4&.

  • 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).

  • This British Geological Survey (BGS) marine geophysical survey took place in March 2009 in the Medway & Swale Estuaries on board the Medway Surveyor. The purpose was to obtain the data necessary for the Coastal Evolution of the Medway & Swale estuary targeting the Holocene thickness and distribution of sediments within the Paleo Valley. Sea floor data were collected using a ODOM Echotrac III run by Peel Ports. Sub bottom seismic profiling data were gathered by BGS 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 OR/09/014.

  • 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 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 geophysical survey has been carried out by, British Geological Survey (BGS), the survey took place in July 1991 in the North Sea on board the RRS Challenger. The purpose was to collect data to investigate gas-leakage phenomena from pockmarks in the North Sea. Sea floor data were collected using Sidescan Sonar. Sub-bottom profiling data were collected using Deep Tow Boomer. These data were recorded digitally and are archived by BGS.

  • This high resolution marine multi-channel seismic survey commissioned by the Institute of Geological Sciences on behalf of Department of Energy took place in the Northern North Sea during 1st-27th November 1979 (Phase 1) aboard MV Aqua Star and 1st-14th February 1980 (Phase2) aboard Gardline Tracker. Phase 1 (Lines 1-5) was carried out by Fairfield Auatronics Ltd and Phase 2 (lines 5B-9) by Gardline surveys Ltd. Line coverage total 445km (Phase1 - 180km; Phase 2 - 265km). Sea floor data were collected using Echo sounder. Subsurface seismic data were gathered using a 9/15KJ sparker and line 4, Fairflex sleeve exploder. Survey details are contained in Fairfield and gardline acquisition reports and BGS technical report WB/MG/81/124.

  • 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&.