Data report: orientation correction of Chicxulub core recovered from IODP/ICDP Expedition 364

Abstract

During International Ocean Discovery Program (IODP)/International Continental Drilling Project (ICDP) Expedition 364, the peak ring of the Chicxulub impact crater was drilled in April–May 2016. The expedition recovered 829 m of core, from 505.7 to 1334.7 meters below seafloor (mbsf). Because the geographic in situ orientation of the core is not preserved during the drilling process, we report orientation corrections for all core sections. Angular correction values were determined by comparing and matching fractures and lithologic contacts between computed tomography scans of the cores and downhole acoustic borehole images as well as comparing fractures and contacts from one core section to another. The orientation correction values can be used to reorient cores to true geographic north, enabling proper assessment of directionality for structural deformation, paleomagnetic indicators, and sedimentary transport data with the Expedition 364 cores.