10.1594/PANGAEA.948452Titschack, JürgenJürgenTitschack0000-0001-9373-9688Stavrakoudis, SophiaSophiaStavrakoudisMolari, MassimilianoMassimilianoMolari0000-0003-4995-7818Yapan, Batuhan ÇağrıBatuhan ÇağrıYapanJanssen, FelixFelixJanssen0000-0002-5607-4012Timann, ChristianChristianTimannLemke, Arne-JörnArne-JörnLemkePANGAEA2024Computed TomographyMining impactSediment characterisationFile contentBinary ObjectNumber of sliceDEPTH, sediment/rockManganese nodules, volumeSediment, homogenized upper layer, volumeSediment, bioturbated lower layer, volumeBioturbation, volumeCracks, volumeBioturbationManganese nodules, relative volumeSediment, homogenized upper layer, relative volumeSediment, bioturbated lower layer, relative volumeCracks, relative volumeX-ray attenuation, matrix sediment, meanX-ray attenuation, matrix sediment, standard deviationNumber of voxels, matrix sedimentMultiCorerComputer tomograph (CT) Philips Brilliance iCT Elite 256IP21Island PrideCenter for Marine Environmental Sciences (MARUM)JPI Oceans - Ecological Aspects of Deep-Sea Mining (JPIO-MiningImpact)2021-04-21T11:46:00Dataset10.1016/B978-012387582-2/50040-X12720 data pointstext/tab-separated-valuesCreative Commons Attribution 4.0 InternationalSelected 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.-125.87408314.112183North Pacific OceanFederal Ministry of Education and Researchhttps://doi.org/10.13039/50110000234703F0812AJPI-O MiningImpact: Monitoringkonzepte für einen Manganknollenabbau in der Tiefsee