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Metadata: British Geological Survey (BGS) Geophysical Survey 2003/1: Regional Study: Hatton-Rockall (11/Aug/2003 to 28/Aug/2003)
Abstract:
This British Geological Survey (BGS) marine geophysical survey took place during August 2003 on the UK Continental Shelf west of the United Kingdom, specifically in the Rockall and Hatton basins on board the Royal Research Ship RRS Discovery (Cruise D273). The purpose of the survey was to gather data to map the regional geology of the area. A total of 1677 km of good quality data were collected. Sea floor data were collected using an echo-sounder. Subsurface data were gathered using a suite of seismic instruments (airgun, sparker and pinger), plus a gravity meter and a magnetometer. Most of the data were recorded digitally, but paper output was also generated. The data are archived by BGS. Technical details of the survey are contained in BGS Internal Report IR/03/177. GeoIndex Offshore - https://mapapps2.bgs.ac.uk/geoindexoffshore/home.html?cruise=20031&.
Data holder:
British Geological Survey (BGS)
| Other details | ||
| Internal code | Internally assigned metadata identifier | 6772 |
| Title | The title is used to provide a brief and precise description of the dataset such as 'Date', 'Originating organisation/programme', 'Location' and 'Type of survey'. All acronyms and abbreviations should be reproduced in full. | British Geological Survey (BGS) Geophysical Survey 2003/1: Regional Study: Hatton-Rockall (11/Aug/2003 to 28/Aug/2003) |
| Alternative title | The purpose of alternative title is to record any additional names by which the dataset may be known. | D273 |
| File Identifier | The File Identifier is a code, preferably a GUID, that is globally unique and remains with the same metadata record even if the record is edited or transferred between portals or tools. | abc9f747-534e-0f38-e044-0003ba9b0d98 |
| Resource Identifier | This is the code assigned by the data owner. | BGS_CMD_REF300 |
| Resource type | The resource type will likely be a dataset but could also be a series (collection of datasets with a common specification) or a service. | dataset |
| Start date | This describes the date the resource starts. This may only be the year if month and day are not known | 2003-08-11 |
| End date | This describes the date the resource ends. This may only be the year if month and day are not known | 2003-08-28 |
| Spatial resolution | This describes the spatial resolution of the dataset or the spatial limitations of the service. | 5 |
| Spatial resolution unit | This describes the unit of spatial resolution which for distance must be metres. | urn:ogc:def:uom:EPSG::9001 |
| Frequency of updates | This describes the frequency with which the resource is modified or updated i.e. a monitoring programme that samples once per year has a frequency that is described as 'annually'. | notPlanned |
| Abstract | The abstract provides a clear and brief statement of the content of the resource. | This British Geological Survey (BGS) marine geophysical survey took place during August 2003 on the UK Continental Shelf west of the United Kingdom, specifically in the Rockall and Hatton basins on board the Royal Research Ship RRS Discovery (Cruise D273). The purpose of the survey was to gather data to map the regional geology of the area. A total of 1677 km of good quality data were collected. Sea floor data were collected using an echo-sounder. Subsurface data were gathered using a suite of seismic instruments (airgun, sparker and pinger), plus a gravity meter and a magnetometer. Most of the data were recorded digitally, but paper output was also generated. The data are archived by BGS. Technical details of the survey are contained in BGS Internal Report IR/03/177. GeoIndex Offshore - https://mapapps2.bgs.ac.uk/geoindexoffshore/home.html?cruise=20031&. |
| Lineage | Lineage includes the background information, history of the sources of data, data quality statements and methods. | Geophysical equipment types used included: Airgun/Sleeve Gun, Echo Sounder, Gravimeter, Magnetometer, Pinger and Sparker. The survey was undertaken by British Geological Survey. AIRGUN SYSTEM - Source: An array of 5 x 40 cu.in. Bolt 600B airguns with waveshape kits and time break solenoids. Routinely, up to four guns were fired simultaneously, keeping the fifth gun as a ready spare. The number of guns used was varied with water depth, with a minimum of two being used in the shallower areas. The firing rate varied from 6 – 8 seconds depending on water depth. Gun synchronisation was achieved by monitoring the time break solenoids and manually adjusting as required. This introduced a short time delay into the system of approximately 50 msec and thus the sea-bed return time was not an absolute measurement of depth. Hydrophone: Two channel Geomechanique summed to give a single channel 30m active length. The summing amplifier used was a newly developed BGS unit, which also incorporated low pass and anti-alias filters. Recording: CODA DA200 four channel digital recording and processing system. The data was recorded on Exabyte tape in CODA format with a sampling interval of 0.2 msec, record length of 4 seconds and bandpass filter of 20-800Hz. The start of recording was delayed in deep water to permit a minimum of 2 seconds (TWTT) of data below the sea bed. The CODA system also received a navigation data string from the navigation processor, and logged position on each shot. On-line processing: CODA system.Processes applied were time varied gain (TVG), time varied filtering (TVF) and trace mixing. Both TVG and TVF were applied from the sea bed, which was tracked automatically. SPARKER SYSTEM - Source: EG&G, nine candle, multi-tip array with 135 tips. High Voltage Power Supply: 2 x Applied Acoustic Engineering CSP3000 capacitor charging units, switchable output up to a maximum of 2.2 KJ. Hydrophone: Teledyne, 10 m, 7 channels with all summed to give a single output. Recording: The same CODA DA200 four channel digital recording and processing system as for the airgun. The data were recorded with a sampling interval of 0.1 msec, record length of 1.5 seconds and a bandpass filter of 103-1730 Hz. SUB- BOTTOM PROFILER - IOS 3.5kHz system: a high resolution, deep water (up to 6000m) swept or ‘chirp’ frequency profiling system transceiver: Raytheon PTR 105B producing 6 kWatts of acoustic power. Recorder: Waverley 3710 Linescan recorder and was selected for a 480 msec sweep. The towfish contained four TR109F Massa transducers wired in a parallel series combination. GRAVITYMETER - LaCoste and Romberg AIR-SEA system. MAGNETOMETER - Direct Reading Barringer M123 marine proton precession magnetometer with 1 gamma sensitivity. VECTOR MAGNETOMETER: A three-component vector magnetometer, supplied by the BGS Geomagnetism Programme. ECHO SOUNDER - Simrad EA500 hydrographic echo sounder with a 9 element tow fish operating at 10 kHz. NAVIGATION - Primary: Trimble GPS 4000DL. Secondary: Ashtech GG-24 (combined GPS + GLONASS). The differential corrections for both of these files are fed from a Sea Star (3000L DGPS set to Eik EMS). it must be assumed that prior to 0000 Day 236, positioning was GPS without differential corrections. The ship’s Ashtec ADU-2 (ships attitude) multihead GPS was logged for the duration of the cruise All position data are referred to the WGS 84 datum. For more detailed information on the acquisition equipment and data collection techniques, operational standards, data processing methods and quality control procedures used on this survey see the Report of Survey/Cruise Report and associated documentation where available. The information available may vary depending on the age of the survey. Data are checked and loaded to the BGS Coastal and Marine data management system following BGS marine data management procedures. |
| Related keywords | ||
| Keyword | General subject area(s) associated with the resource, uses multiple controlled vocabularies | NDGO0001 |
| Keyword title | NERC OAI Harvesting | |
| Keyword | General subject area(s) associated with the resource, uses multiple controlled vocabularies | Geology |
| Keyword title | Geology | |
| Keyword | General subject area(s) associated with the resource, uses multiple controlled vocabularies | soil and sediment |
| Keyword title | soil and sediment | |
| Keyword | General subject area(s) associated with the resource, uses multiple controlled vocabularies | crust |
| Keyword title | crust | |
| Keyword | General subject area(s) associated with the resource, uses multiple controlled vocabularies | Gravity |
| Keyword title | Gravity | |
| Keyword | General subject area(s) associated with the resource, uses multiple controlled vocabularies | Bathymetry and Elevation |
| Keyword title | Bathymetry and Elevation | |
| Keyword | General subject area(s) associated with the resource, uses multiple controlled vocabularies | Magnetics |
| Keyword title | Magnetics | |
| Keyword | General subject area(s) associated with the resource, uses multiple controlled vocabularies | Two-dimensional seismic reflection |
| Keyword title | Two-dimensional seismic reflection | |
| Geographical coverage | ||
| North | The northern-most limit of the data resource in decimal degrees | 60.9323 |
| East | The eastern-most limit of the data resource in decimal degrees | -8.6607 |
| South | The southern-most limit of the data resource in decimal degrees | 58.4333 |
| West | The western-most limit of the data resource in decimal degrees | -16.9501 |
| Regional sea | North Rockall Basin | |
| North Hatton | ||
| Bill Bailey's Bank | ||
| Rosemary Bank | ||
| Atlantic North-West Approaches, Rockall Trough and Faeroe/Shetland Channel | ||
| Geikie | ||
| Lousy Bank | ||
| Kennedy | ||
| Darwin | ||
| Scottish Continental Shelf | ||
| NORTHEAST ATLANTIC OCEAN (40W) | ||
| Responsible organisations | ||
| Role | The point of contact is person or organisation with responsibility for the creation and maintenance of the metadata for the resource. | pointOfContact |
| Organisation name | British Geological Survey (BGS) | |
| Phone | +44 (0)131 667 1000 | |
| Fax | +44 (0)131 668 4140 | |
| Delivery point | The Lyell Centre, Research Avenue South | |
| Postal code | EH14 4AP | |
| City | Edinburgh | |
| Country | UK | |
| enquiries@bgs.ac.uk | ||
| Role | The distributor is the person or organisation that distributes the resource. | distributor |
| Organisation name | British Geological Survey (BGS) | |
| Phone | +44 (0)131 667 1000 | |
| Fax | +44 (0)131 668 4140 | |
| Delivery point | The Lyell Centre, Research Avenue South | |
| Postal code | EH14 4AP | |
| City | Edinburgh | |
| Country | UK | |
| enquiries@bgs.ac.uk | ||
| Role | The custodian is the person or organisation that accepts responsibility for the resource and ensures appropriate care and maintenance. If a dataset has been lodged with a Data Archive Centre for maintenance then this organisation is be entered here. | custodian |
| Organisation name | British Geological Survey (BGS) | |
| Phone | +44 (0)131 667 1000 | |
| Fax | +44 (0)131 668 4140 | |
| Delivery point | The Lyell Centre, Research Avenue South | |
| Postal code | EH14 4AP | |
| City | Edinburgh | |
| Country | UK | |
| enquiries@bgs.ac.uk | ||
| Role | The originator is the person or organisation who created, collected or produced the resource. | originator |
| Organisation name | British Geological Survey (BGS) | |
| Phone | +44 (0)131 667 1000 | |
| Fax | +44 (0)131 668 4140 | |
| Delivery point | The Lyell Centre, Research Avenue South | |
| Postal code | EH14 4AP | |
| City | Edinburgh | |
| Country | UK | |
| offshoredata@bgs.ac.uk | ||
| Resource locators | ||
| Locator URL | Web address (URL) that links to the resource | http://mapapps2.bgs.ac.uk/geoindex_offshore/home.html?cruise=2003/1 |
| Locator name | Name of the web resource | BGS Offshore Geoindex |
| Locator function | Code that describes the function of the resource. ISO function code chosen from ISO 19115-1 Codelist | search |
| Dataset constraints | ||
| 20 Limitations on Public Access - Access constraints | otherRestrictions | |
| 21 Conditions for Access and Use - Use limitation | This states any constraints on use of the data. Multiple conditions can be recorded for different parts of the data resource. If no conditions apply, then `No condtions apply` is recorded. This uses free text. | unrestricted use, copyright acknowledgement - Available under the Open Government Licence subject to the following acknowledgement accompanying the reproduced British Geological Survey materials "Contains British Geological Survey materials ©UKRI [year]" |
| Version info | ||
| Date of publication | The publication date of the resource or if previously unpublished the date that the resource was made publicly available via the MEDIN network. | 2003-08-28 |
| Harvest date | The date which this record has been (re)harvested from the provider. | 2026-04-19 |
| Metadata date | The date when the content of this metadata record was last updated. | 2026-04-17 |
| Metadata standard name | The name of the metadata standard used to create this metadata | MEDIN Discovery Metadata Standard |
| Metadata standard version | The version of the MEDIN Discovery Metadata Standard used to create the metadata record | Version 2.3.5 |