EGU General Assembly 2007
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  Information - GD20 Cretaceous-Tertiary Plate Kinematics, Continental Breakup and Sea-Floor Spreading History of the Northern North Atlantic and Arctic Ocean

Event Information
New data and concepts have recently emerged which are leading the scientific and industrial communities to rethink the Cretaceous and Tertiary plate kinematics of the northern N. Atlantic. Recent observations and concepts are impinging not just on the pattern and timing of plate kinematics but also on our understanding of the geodynamic processes occuring during continental breakup and sea-floor spreading. Some examples of important questions that are in need of answers are:
# Is magma-poor sea-floor spreading and mantle exhumation pervasive in many parts of the Cretaceous N. Atlantic ocean basin?
# How much of the Labrador Sea is underlain by oceanic crust and what is the timing of its formation?
# What are the linkages (in space, time and process) between sea-floor spreading in the Eurasia Basin (and perhaps also the Amerasia Makarov Basin) and sea-floor spreading processes occurring in Baffin Basin and the Labrador Sea?
# What are the processes that formed the Rockall Trough - is it underlain by thinned continental crust, oceanic crust or exhumed mantle?
# How does the Tertiary development (including aborted sea-floor spreading and ridge jumps) of the northeast N. Atlantic relate to mantle plume development? For instance can we reconcile the very thin Aegir ocean crust with Tertiary mantle plume history?
Contributions are invited from both academia and industry addressing observations of the crustal structure and composition of both oceanic and rifted continental margin lithosphere, plate reconstructions, geodynamic processes and models.

Preliminary List of Solicited Speakers


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