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Metadata: Rockall Consortium (RCK) Geophysical Survey 1993/2_RCK: Northern Rockall Trough and adjacent areas (04/07/1993 to 14/08/1993)
Abstract:
This geophysical survey has been carried out by Digicon Geophysical, for British Geological Survey (BGS), the Multichannel Deep Seismic survey took place from July to August 1993 in the Rockall area on board the MV Acadian Searcher. The purpose was to collect data as part of Rockall Continental Margin Project: 1) to shoot a grid of lines on eastern flank of Rockall Bank; 2) to shot three long transect lines across Rockall Bank and the Rockall-Hatton Basin down to 18sec two-way time; 3) to acquire gravity data. Sub-bottom profiling data were collected using Airguns. Gravity data were collected. These data were recorded digitally and are archived by BGS. Technical details of the survey are contained in BGS report WB/93/28C and contractor report. GeoIndex Offshore - https://mapapps2.bgs.ac.uk/geoindexoffshore/home.html?cruise=1993/2RCK&.
Data holder:
British Geological Survey (BGS)
| Other details | ||
| Internal code | Internally assigned metadata identifier | 33989 |
| 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. | Rockall Consortium (RCK) Geophysical Survey 1993/2_RCK: Northern Rockall Trough and adjacent areas (04/07/1993 to 14/08/1993) |
| 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. | abc9f747-5372-0f38-e044-0003ba9b0d98 |
| Resource Identifier | This is the code assigned by the data owner. | BGS_CMD_REF262 |
| 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 | 1993-07-04 |
| End date | This describes the date the resource ends. This may only be the year if month and day are not known | 1993-08-14 |
| 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 geophysical survey has been carried out by Digicon Geophysical, for British Geological Survey (BGS), the Multichannel Deep Seismic survey took place from July to August 1993 in the Rockall area on board the MV Acadian Searcher. The purpose was to collect data as part of Rockall Continental Margin Project: 1) to shoot a grid of lines on eastern flank of Rockall Bank; 2) to shot three long transect lines across Rockall Bank and the Rockall-Hatton Basin down to 18sec two-way time; 3) to acquire gravity data. Sub-bottom profiling data were collected using Airguns. Gravity data were collected. These data were recorded digitally and are archived by BGS. Technical details of the survey are contained in BGS report WB/93/28C and contractor report. GeoIndex Offshore - https://mapapps2.bgs.ac.uk/geoindexoffshore/home.html?cruise=1993/2RCK&. |
| 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, CHIRP Sub-bottom Profiler, Echo Sounder and Gravimeter. Digicon Geophysical was contracted to undertake the survey on behalf of Rockall Consortium. NAVIGATION: Skyfix, Differential GPS, WGS-84, Universal Transverse Mercator Zone 28N CM 15W. SEISMIC AIRGUN: 1726.825km (Grid:1065.67km, Transect: 661.15km): Single Tuned Point Source Array, Bolt 1500LL and 1900C airguns, 4 strings of 10,50m wide array. Operating Pressure 1900 psi (min1800psi). Grid: 24 Active guns, 16 spare, array volume 6360 cu in., (min 5410 cu in). Transect: 40 active guns, array volume 9300 cu in., (min 7900 cu in). Array depth: 10+1m. Gun timing system: Digitcon CLASSII. Multi-channel Streamer: 240 groups, 25m group length and interval, total length 6000m, depth 15m +2m, Hydrophone: DG-018 acceleration-cancelling (14 per group), Sample rate: 2 milliseconds and 4 milliseconds, 8 compasses, Digicourse 318 or 321 in-line compass sections. Digicon DSS-240 seismic data acquisition system. Record format: Demultiplexed SEG-Y @ 6250 bpi IBM floating point, tape drives: Telex tri-density(125ips @6250 bpi), Recording parameters: Grid: Record length 10 sec, Sample rate 2ms, Low cut filter 3Hz, High cut filter 160 Hz,Fold coverage 60, Number of Runoff shots 63, Shotpoint intervals 50m, Single Trace Plotter. Trace near 4. Plots every 41 shots, Nav log tape, Single data trace – Quietest of near 4. Transect: Record length 18 sec, Sample rate 4ms, Low cut filter 3Hz, High cut filter 80 Hz,Fold coverage 120, Number of Runoff shots 125, Shotpoint intervals 25m, Single Trace Plotter. Trace near 4. Plots every 41 shots, Nav log tape, Single data trace – Quietest of near 4. On board seismic data processing: Advance Geophysical PROMAX on an IBM340. Brute stacks produced for Grid survey and Transect lines. GRAVITY: Lacoste and Romberg S-75 fitted with a J & K interface box and using Co-operator v3.62 software, all lines except the latter half of D13 and first half of D15. Grid: recorded at 10 second interval. Transect: recorded at 5 second interval. Base ties, field cross-tie calculations. 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 | Two-dimensional seismic reflection |
| Keyword title | Two-dimensional seismic reflection | |
| Geographical coverage | ||
| North | The northern-most limit of the data resource in decimal degrees | 59.4221 |
| East | The eastern-most limit of the data resource in decimal degrees | -11.5688 |
| South | The southern-most limit of the data resource in decimal degrees | 56.675 |
| West | The western-most limit of the data resource in decimal degrees | -17.0188 |
| Regional sea | North Rockall Basin | |
| North Hatton | ||
| Harker | ||
| Central Rockall Basin | ||
| Central Hatton | ||
| Atlantic North-West Approaches, Rockall Trough and Faeroe/Shetland Channel | ||
| George Bligh Bank | ||
| Kennedy | ||
| McCallien | ||
| Anton Dohrn | ||
| Rockall Island | ||
| 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 | Rockall Consortium | |
| 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=1993/2_RCK |
| 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. | 1993-08-14 |
| Harvest date | The date which this record has been (re)harvested from the provider. | 2026-04-17 |
| Metadata date | The date when the content of this metadata record was last updated. | 2026-04-16 |
| 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 |