The OCTek-Arctic/North Atlantic study has investigated the rifted margins and basins of the Arctic and North Atlantic, south to 50°N, where the study joins with OCTek-Atlantic.
The results will therefore be of interest to those exploring or evaluating the offshore basins of:
• Arctic Canada & Alaska, including the Beaufort & Chukchi Seas
• Arctic Russia, including the East Siberia, Laptev, Kara & Barents Seas
• Arctic Norway & Greenland, including the Spitsbergen area
• The Norwegian & East Greenland Atlantic margins, including Jan Mayen
• West Greenland, including Baffin Bay & the Labrador Sea
• The western UK/Ireland Atlantic margin
The primary output from OCTek-Arctic/North Atlantic is a comprehensive suite of digital grids for the Arctic/North Atlantic area which show:
1 Depth to Moho
2 Total crustal thickness
3 Residual continental-basement crustal thickness
4 Crust and lithosphere thinning/beta factor
5 The residual thermal gravity anomaly at the present-day
The results have been tuned to local breakup/rift ages along the margins and to local crustal reference thickness. They also explore a range of plausible scenarios for the amount of volcanic addition during breakup. As well as presenting the grids in their present-day coordinate framework the crustal thickness grids have been sequentially restored to the mid-Cretaceous, using recent stage-poles. This restores the sea-floor spreading in the North Atlantic, Eurasia Basin and Baffin Bay.
The suite of digital grids is available for unrestricted use by purchasing companies and institutions and is supported by an atlas of maps, which documents the techniques and data used together with a map-plot from all of the supplied grids.
OCTek-Arctic/North Atlantic is based on analysis of data available in the public domain. OCTek gravity inversion is proven technology which has also delivered the OCTek-Atlantic, OCTek-Asia Pacific, OCTek-Australasia, OCTek-GoM and OCTek-Indian Ocean studies together with confidential results on a proprietary basis from rifted margins worldwide.
A study applying the OCTek gravity inversion methodology to the conjugate South Australia – Antarctic margins has been made available for free public download by Geoscience Australia.