EVIDENCE OF TERTIARY INTRUSIVE ROCK AT THE WEST OF DUDDON SANDS OFFSHORE WIND FARM

摘要

The West of Duddon Sands Offshore Wind Farm is located in the Irish Sea off the English coast. The site isrncurrently being developed by a joint venture between Scottish Power Renewables and DONG Energy. Duringrnthe site maturation phase the interpretation of geophysical survey data revealed localised bedrock cropping outrnclose to seabed in the southern part of the site. This outcropping bedrock influenced the layout of the site andrnwas identified as intrusive igneous rock of Tertiary age. A variety of different site investigation methods werernused to identify the intrusive igneous rock, ranging from seismic profiling and magnetic gradiometer to in siturnsampling and testing, and onshore laboratory testing. Due to the extensive heat impact of the intrusion, thernmechanical properties of the surrounding native rock formation (Mercia Mudstone Group) have been altered.rnThis metamorphic evidence has been detected up to ~250m from the intrusions.