1991 Marine Biological Association (MBA) Witch Ground Basin RRS Challenger Cruise 82 sediment cores and gas sampling

• Published by: Marine Environmental Data & Information Network
• Last updated: 20 July 2024
• Topic: Not added
• Licence: Other Licence ; View licence information

Summary

The objectives of Leg 1 of this survey were: - To locate the source of hydrogen plumes in the Witch Ground Basin by taking water samples with the rosette sampler. - To take core samples from the 2 large pockmarks in UK Block 15/25 to obtain Astomonema and other samples needed to complete studies on these pockmarks. - To re-survey the extent of the shallow gas deposits mapped in 1990. Leg 2: - To map the distribution of shallow gas and gas seeps in the Skagerrak north of Hirtshals and to study the relationship of the seeps to bottom and sub-bottom topography. - To obtain sediment cores from methane-rich and methane-poor sediments in order to compare their biomass, species composition and geochemistry. - To collect fauna for stable isotope analysis, for biochemical studies and for electron microscopy. - To measure gas concentrations and bacterial activity in the sediments and in the water collumn.

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Data links

Link to the data	Format	File added	Data preview
DASSH homepage	N/A	20 July 2024	Not available
DOI link	N/A	20 July 2024	Not available

Additional information

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• Added to data.gov.uk: 2021-12-23
• Access contraints: Open Government License (OGL)- no restriction to public access
• Harvest GUID: fafe6be12e831f965fbc3f43ab1adbd7
• Extent: Latitude: 59.0000° to 57.0000°
• Extent: Longitude: 0.0000° to 11.0000°
• Spatial reference system: urn:ogc:def:crs:EPSG::4326
• Dataset reference date: 2021-12-23 (publication)
• Dataset reference date: 1991-07-28 (creation)
• Dataset reference date: 2021-12-23 (revision)
• Frequency of update: notPlanned
• Responsible party: Marine Biological Association of the UK (MBA) (originator); Data Archive for Seabed Species and Habitats (DASSH) (custodian)
• ISO 19139 resource type: dataset
• Metadata language: eng
• Source Metadata: XML
• Source Metadata: HTML

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Licence information

Open Government License (https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/)