µCT data of two drill cores of fractured crystalline rock (Grimsel)

2026-04-21T05:50:15Z https://rodare.hzdr.de/oai2d

oai:rodare.hzdr.de:2537 2023-11-03T09:47:08Z openaire_data user-ecfunded user-fwo user-rodare

true 3.1 HZDR.RODARE 10.14278/rodare.2537 Kulenkampff, Johannes 0000-0001-6566-5829 HZDR µCT data of two drill cores of fractured crystalline rock (Grimsel) Rodare 2023 X-ray computed tomography crystalline rock granite drill core fracture Loesel, Dagmar HZDR Schoessler, Claudia HZDR Jankovsky, Filip UJV Rez Zuna, Milan UJV Rez European Commission info:eu-repo/grantAgreement/EC/H2020/847593/ 2023-11-01 en https://rodare.hzdr.de/record/2537 https://www.hzdr.de/publications/Publ-37750 10.14278/rodare.2536 https://rodare.hzdr.de/communities/ecfunded https://rodare.hzdr.de/communities/fwo https://rodare.hzdr.de/communities/rodare 1.0 Restricted Access Two crystalline rock drill cores from the Grimsel site were scanned with a Nikon XT H 225 - scanner. The samples were prepared (formatted and cast in epoxy) by UJV Rez, Czech Republic. The CT-data were acquired and processed at HZDR-FWOT. Sample 1 (GAM_UJV_1C_1) contains a complex system of interconnected fractures. Sample 2 (GAM_UJV_1C_2) contains one single end-to-end fracture with larger aperture. Size of both samples: Diameter 80 mm, length 165 mm. Two tomograms were acquired for both samples: 1) Complete drill core as one scan, voxel size ca. 75 µm. 2) HR-tomogram merged from three sections with maximum resolution, voxel size ca. 40 µm. The tomograms were stored as 3D-raw files. Data format, acquisition parameters, and processing workflow, are documented in the tomogram header files (nrrd-format (text):  see https://teem.sourceforge.net/nrrd/format.html). This data format is importable into open-source visualization programs as 3D slicer (https://www.slicer.org) or Paraview (https://www.paraview.org). The data processing has been conducted with Avizo (https://www.thermofisher.com/de/de/home/electron-microscopy/products/software-em-3d-vis/avizo-software.html). Files: Sample 1 GAM_UJV_1C_1_complet-2_01_NLM: Graylevel image of complete sample, ring artifact removal, non-local-means filter GAM_UJV_1C_1_complet-2_01_thresholded: Tentative label image of complete sample, threshold segmentation with manual edit Merged-GAM_UJV_1C_1_HR.Frac_section: Graylevel image of merged fracture section, unfiltered Merged-GAM_UJV_1C_1_HR.Frac_section.Threshold: Tentative label image of merged fracture section, adaptive threshold segmentation with manual edit GAM_UJV_1C_1_complet_2.png: Figure of complete sample  GAM_UJV_1C_1_HR_Frac_Y2.png: Figure of merged high-resolution tomogram Sample 2 GAM_UJV_1C_2_complet_01.filtered: Graylevel image of complete sample, ring artifact removal, non-local-means filter GAM_UJV_1C_2_complet_01.filtered.thresholded: Tentative label image of complete sample,  threshold segmentation with manual edit Merged-GAM_UJV_1C_2_A_01.Frac_section.filtered: Graylevel image of merged fracture section, ring artifact removal, non-local-means filter Merged-GAM_UJV_1C_2_A_01.Frac_section.filtered.segm: Tentative label image of merged fracture section, threshold segmentation with manual edit GAM_UJV_1C_2_complett_2.png: Figure of complete sample GAM_UJV_1C_2_HR_Frac_Y2.png: Figure of merged high-resolution tomogram Original acquistion data are stored on the HZDR bulk data storage system and available for reprocessing on request. Financial support was granted from the European Union’s Horizon 2020 research and innovation program under grant agreement No. 847593 (EURAD, WP FUTURE, task 2.2).