Characterization of spatial porosity and mineral distribution of crystalline rock using X-ray micro computed tomography, C-14-PMMA autoradiography and scanning electron microscopy

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dc.contributor.author Voutilainen, Mikko
dc.contributor.author Miettinen, Arttu
dc.contributor.author Sardini, Paul
dc.contributor.author Parkkonen, Joni
dc.contributor.author Sammaljärvi, Juuso
dc.contributor.author Gylling, Björn
dc.contributor.author Selroos, Jan-Olof
dc.contributor.author Yli-Kaila, Maarit
dc.contributor.author Koskinen, Lasse
dc.contributor.author Siitari-Kauppi, Marja
dc.date.accessioned 2020-12-29T02:43:00Z
dc.date.available 2021-12-17T22:45:42Z
dc.date.issued 2019-02
dc.identifier.citation Voutilainen , M , Miettinen , A , Sardini , P , Parkkonen , J , Sammaljärvi , J , Gylling , B , Selroos , J-O , Yli-Kaila , M , Koskinen , L & Siitari-Kauppi , M 2019 , ' Characterization of spatial porosity and mineral distribution of crystalline rock using X-ray micro computed tomography, C-14-PMMA autoradiography and scanning electron microscopy ' , Applied Geochemistry , vol. 101 , pp. 50-61 . https://doi.org/10.1016/j.apgeochem.2018.12.024
dc.identifier.other PURE: 123510421
dc.identifier.other PURE UUID: 814d5235-e927-4ae6-b086-5ec8184b8890
dc.identifier.other Scopus: 85059131330
dc.identifier.other WOS: 000460725800005
dc.identifier.other ORCID: /0000-0002-7329-4252/work/56159971
dc.identifier.other ORCID: /0000-0002-5534-149X/work/56161892
dc.identifier.uri http://hdl.handle.net/10138/323848
dc.description.abstract The spatial porosity and mineral distribution of geological materials strongly affects transport processes in them. X-ray micro computed tomography (X-mu CT) has proven to be a powerful tool for characterizing the spatial mineral distribution of geological samples in 3-D. However, limitations in resolution prevent an accurate characterization of pore space especially for tight crystalline rock samples and 2-D methods such as C-14-polymethylmethacrylate (C-14-PMMA) autoradiography and scanning electron microscopy (SEM) are needed. The spatial porosity and mineral distributions of tight crystalline rock samples from Aspo, Sweden, and Olkiluoto, Finland, were studied here. The X-mu CT were used to characterize the spatial distribution of the main minerals in 3-D. Total porosities, fracture porosities, fracture densities and porosity distributions of the samples were determined using the C-14-PMMA autoradiography and characterization of mineral-specific porosities were assisted using chemical staining of rock surfaces. SEM and energy dispersive X-ray spectroscopy (EDS) were used to determine pore apertures and identify the minerals. It was shown that combination of the different imaging techniques creates a powerful tool for the structural characterization of crystalline rock samples. The combination of the results from different methods allowed the construction of spatial porosity, mineral and mineral grain distributions of the samples in 3-D. These spatial distributions enable reactive transport modeling using a more realistic representation of the heterogeneous structure of samples. Furthermore, the realism of the spatial distributions were increased by determinig the densities and porosities of fractures and by the virtual construction heterogeneous mineral distributions of minerals that cannot be separated by X-mu CT. en
dc.format.extent 12
dc.language.iso eng
dc.relation.ispartof Applied Geochemistry
dc.rights cc_by_nc_nd
dc.rights.uri info:eu-repo/semantics/openAccess
dc.subject C-14-PMMA autoradiography
dc.subject CONNECTED POROSITY
dc.subject Crystalline rock
dc.subject Crystalline rocks
dc.subject DIFFUSION EXPERIMENT
dc.subject Energy dispersive X-ray spectroscopy
dc.subject FRACTURES
dc.subject Heterogeneity
dc.subject IMPREGNATION
dc.subject INTERFACE
dc.subject MICROTOMOGRAPHY
dc.subject OLKILUOTO
dc.subject Pore structure
dc.subject Porosity
dc.subject RESOLUTION
dc.subject SCALE
dc.subject SIMULATION APPROACH
dc.subject Scanning electron microscopy
dc.subject X-ray micro computed tomography
dc.subject 116 Chemical sciences
dc.subject 1171 Geosciences
dc.title Characterization of spatial porosity and mineral distribution of crystalline rock using X-ray micro computed tomography, C-14-PMMA autoradiography and scanning electron microscopy en
dc.type Article
dc.contributor.organization Geological disposal of spent nuclear fuel
dc.contributor.organization Department of Chemistry
dc.description.reviewstatus Peer reviewed
dc.relation.doi https://doi.org/10.1016/j.apgeochem.2018.12.024
dc.relation.issn 0883-2927
dc.rights.accesslevel openAccess
dc.type.version acceptedVersion

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