Mid-Norwegian Margin Magmatism and Paleoclimate Implications: Expedition 396 Preliminary Report

IODP Expedition 396 Scientists, Sverre Planke, Christian Berndt, Carlos A. Alvarez Zarikian, Amar Agarwal, Graham D.M. Andrews, Peter Betlem, Joyeeta Bhattacharya, Henk Brinkhuis, Sayantani Chatterjee, Marialena Christopoulou, Vincent J. Clementi, Eric C. Ferré, Irina Y. Filina, Joost Frieling, Pengyuan Guo, Dustin T. Harper, Morgan T. Jones, Sarah Lambart, Jack LongmanJohn M. Millett, Geoffroy Mohn, Reina Nakaoka, Reed P. Scherer, Christian Tegner, Natalia Varela, Mengyuan Wang, Weimu Xu, Stacy L. Yager

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The opening of the North Atlantic about 56 My ago was associated with the emplacement of the North Atlantic Igneous Province, including the deposition of voluminous extrusive basaltic successions and intrusion of magma into the surrounding sedimentary basins. The mid-Norwegian Margin is a global type example of such volcanic rifted margins and is well suited for scientific drilling with its thin sediment cover and good data coverage. During International Ocean Discovery Program Expedition 396, 21 boreholes were drilled at 10 sites in five different geological settings on this volcanic margin. The boreholes sampled a multitude of igneous and sedimentary settings ranging from lava flow fields to hydrothermal vent complexes, along with thick successions of upper Paleocene and lower Eocene strata. A comprehensive suite of wireline logs was collected in eight boreholes. The main goals of the expedition were to provide constraints for geodynamic models to test different hypotheses that can explain the rapid emplacement of large igneous provinces and the hypothesis that the associated Paleocene/Eocene Thermal Maximum was caused by hydrothermal release of carbon in response to magmatic intrusions. Successful drilling, combined with high core recovery of target intervals of all nine primary sites and one additional alternate site, should allow us to achieve these goals during postcruise work.

Original languageEnglish
PublisherInternational Ocean Discovery Program
Number of pages58
Publication statusPublished - 1 Jan 2022
Externally publishedYes

Publication series

NameInternational Ocean Discovery Program: Preliminary Reports


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