Report 571
Geological investigation of pockmarks in the Braemar Pockmarks SCI
(2015)
Gafeira, J. & Long, D.
This report describes the findings of a desk study carried out by British Geological Survey (BGS) for the Joint Nature Conservation Committee (JNCC) covering the Braemar Pockmarks SCI area. The Braemar Pockmarks SCI is located in the UK Northern North Sea in the vicinity of the Braemar field (UKCS Block 16/3). This site was submitted to the European Commission on 31st August 2008, under the EC Habitats Directive: 1180 Submarine structure made by leaking gases, and was approved as a Site of Community Importance (SCI) by the European Commission.
 

Introduction


 

Focusing on the pockmarks found in and around the Braemar Pockmarks SCI area, this report looks at specific factors that influence the formation and exposure of carbonate structures within the pockmarks. The new data collected on a JNCC research cruise at the end of 2012, cruise CEND19x/12, in partnership with the Centre for Environment, Fisheries & Aquaculture Science (CEFAS) provided the main dataset for this study. The multibeam dataset collected was used to semi-automatically map and characterise the morphology of the pockmarks. The information extracted from the mapped pockmarks was then compared to the information extracted from previous surveys collected for BP. Backscatter data and side-scan sonar data was used to characterise the nature of the seafloor, in particular the presence of Methane-Derived Authigenic Carbonate (MDAC).

 
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ISSN 0963 8091
 
Please cite as: Gafeira, J. & Long, D., (2015), Geological investigation of pockmarks in the Braemar Pockmarks SCI, JNCC Report 571, ISSN 0963 8091