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GD3.3/TS10.3

Neoproterozoic basins and orogenesis in the circum-North Atlantic region (co-organized)
Convener: Peter Cawood  | Co-Convener: Rob Strachan 
Oral Programme
 / Tue, 05 Apr, 15:30–17:00  / Room 30
Poster Programme
 / Attendance Mon, 04 Apr, 15:30–17:00  / Display Mon, 04 Apr, 08:00–19:30  / Hall A
Latest Mesoproterozoic to end Neoproterozoic (meta) sedimentary successions are widespread around the circum-North Atlantic region. From a broad perspective, they provide a critical link between the Grenville-Sveconorwegian and Appalachian-Caledonian orogens, recording the transition from Rodinian to Gondwanan supercontinent cycles. However, there are fundamental differences in published models for the evolution of these successions. The detailed settings of the various sedimentary basins (e.g. intracratonic vs plate margin) and the significance of Neoproterozoic tectono-metamorphic events (e.g. compressional vs extensional) are highly controversial. We welcome contributions on these successions, their tectonic history, and their spatial and temporal associations within the circum-North Atlantic and environs.

Invited speakers
Maurice Colpron - Baltican and Caledonian origins for Neoproterozoic successions in exotic terranes of the North American Cordillera

Galen P. Halverso (with G. Cox, F.M. Macdonald, C. Roots, and J. Strauss) - Multi-stage breakup of Rodinia in northwest Laurentia: new insights from the Yukon

Chris Kirkland (with J.S. Daly, B. Bingen, and S.P. Johnson) - Latest Mesoproterozoic to Neoproterozoic evolution of the North Atlantic Region: perspective from a comparative Lu-Hf study with Proterozoic Western Australia

Sergei Pisarevsky - Neoproterozoic paleogeography: paleomagnetic perspective