Publication Date:
2022-01-31
Description:
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.
Type:
Report
,
NonPeerReviewed
Format:
text
DOI:
10.14379/iodp.pr.396.2022
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