Publication Date:
2024-06-23
Description:
Selected multicorer cores and ROV push cores (IP21_021-17, IP21_021-18, IP21_061, IP21_061-19, IP21_061-20) of R/V Island Pride cruise IP21 were scanned using a Philips Brilliance iCT Elite 256 computer tomograph (CT) at the hospital Klinikum Bremen-Mitte, with an X- ray source voltage of 120 kV and a current of 300 mA. The CT image stacks have a physical resolution of 0.293 mm in the x and y directions and 0.625 mm resolution in the z direction (collimation; 0.3 mm reconstruction interval). Images were reconstructed using the filtered Back Projection (fBP) mode and a bone kernel (YB (Enhanced)).
The data were processed with the ZIB edition of the Amira software (version 2019.51; Stalling et al., 2005; http://amira.zib.de). Within Amira, the core liners, including about 2 mm of the core rims, were deleted from the data set. Mangan nodules with diameters 〉~1 mm, open bioturbation traces, an unidentified organism, the natural bioturbated and surficial homogenised sediment were segmented by a marker-based watershed segmentation and visualized in 3D. Subsequently, the sediment components were quantified (MaterialStatistics module; volume per slice) and the mean and standard deviation of the sediment x-ray attenuation (MaterialStatistics module; statistics per slice per label; to avoid marginal averaging effects the sediment label was reduced by three voxels) were determined.
Keywords:
Binary Object; Bioturbation; Bioturbation, volume; Center for Marine Environmental Sciences; Computed Tomography; Computer tomograph (CT) Philips Brilliance iCT Elite 256; Cracks, relative volume; Cracks, volume; DEPTH, sediment/rock; File content; IP21; IP21_021PUC09; Island Pride; JPI Oceans - Ecological Aspects of Deep-Sea Mining; JPIO-MiningImpact; MANGAN21; Manganese nodules, relative volume; Manganese nodules, volume; MARUM; Mining impact; Number of slice; Number of voxels, matrix sediment; PUC; PUC#09; Push corer; Sediment, bioturbated lower layer, relative volume; Sediment, bioturbated lower layer, volume; Sediment, homogenized upper layer, relative volume; Sediment, homogenized upper layer, volume; Sediment characterisation; X-ray attenuation, matrix sediment, mean; X-ray attenuation, matrix sediment, standard deviation
Type:
Dataset
Format:
text/tab-separated-values, 6059 data points
