Tectonic evolution of the Rockall-Hatton and Faroe-Shetland basins
|Location||International Geological Congress,oslo 2008|
|Author||McAllister, Eddie; Norton, Mike|
|Holding Date||03 September 2008|
The Rockall-Hatton and Faroe-Shetland basins shared a common tectonic evolution during most of their earlier history. Much of their present geometry was created by a period of crustal stretching related to Late Jurassic rifting, followed by mainly passive infill during the Cretaceous. The rift geometry of the Faroe-Shetland Basin, however, was strongly modified by a Late Cretaceous to Early Palaeocene rifting event, thought to represent a precursor to ’break-up’. To the northeast, this rift event can be traced through to the Vøring margin but it is not clear how this precursor rift extended to the southwest, as the main part of the Rockall Basin shows no evidence of this age of deformation. We will describe the kinematics of this rift event and its role in the formation of the Foinaven Sub-basin, look at the way in which the Wyville-Thomson Ridge and related structures accommodated changes in rift geometry and timing between the two basins and discuss evidence for other possible sites of rifting during the Late Cretaceous (or earlier rift phases) between Greenland and the Rockall High.