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

Mikko Voutilainen, Arttu Miettinen, Paul Sardini, Joni Parkkonen, Juuso Sammaljärvi, Björn Gylling, Jan-Olof Selroos, Maarit Yli-Kaila, Lasse Koskinen, Marja Siitari-Kauppi

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

Sammanfattning

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.
Originalspråkengelska
TidskriftApplied Geochemistry
Volym101
Sidor (från-till)50-61
Antal sidor12
ISSN0883-2927
DOI
StatusPublicerad - feb 2019
MoE-publikationstypA1 Tidskriftsartikel-refererad

Vetenskapsgrenar

  • 116 Kemi
  • 1171 Geovetenskaper

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@article{814d5235e9274ae6b0865ec8184b8890,
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",
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.",
keywords = "C-14-PMMA autoradiography, CONNECTED POROSITY, Crystalline rock, Crystalline rocks, DIFFUSION EXPERIMENT, Energy dispersive X-ray spectroscopy, FRACTURES, Heterogeneity, IMPREGNATION, INTERFACE, MICROTOMOGRAPHY, OLKILUOTO, Pore structure, Porosity, RESOLUTION, SCALE, SIMULATION APPROACH, Scanning electron microscopy, X-ray micro computed tomography, 116 Chemical sciences, 1171 Geosciences",
author = "Mikko Voutilainen and Arttu Miettinen and Paul Sardini and Joni Parkkonen and Juuso Sammalj{\"a}rvi and Bj{\"o}rn Gylling and Jan-Olof Selroos and Maarit Yli-Kaila and Lasse Koskinen and Marja Siitari-Kauppi",
year = "2019",
month = "2",
doi = "10.1016/j.apgeochem.2018.12.024",
language = "English",
volume = "101",
pages = "50--61",
journal = "Applied Geochemistry",
issn = "0883-2927",
publisher = "Elsevier Scientific Publ. Co",

}

Characterization of spatial porosity and mineral distribution of crystalline rock using X-ray micro computed tomography, C-14-PMMA autoradiography and scanning electron microscopy. / Voutilainen, Mikko ; Miettinen, Arttu; Sardini, Paul; Parkkonen, Joni; Sammaljärvi, Juuso ; Gylling, Björn; Selroos, Jan-Olof; Yli-Kaila, Maarit; Koskinen, Lasse; Siitari-Kauppi, Marja .

I: Applied Geochemistry, Vol. 101, 02.2019, s. 50-61.

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

TY - JOUR

T1 - Characterization of spatial porosity and mineral distribution of crystalline rock using X-ray micro computed tomography, C-14-PMMA autoradiography and scanning electron microscopy

AU - Voutilainen, Mikko

AU - Miettinen, Arttu

AU - Sardini, Paul

AU - Parkkonen, Joni

AU - Sammaljärvi, Juuso

AU - Gylling, Björn

AU - Selroos, Jan-Olof

AU - Yli-Kaila, Maarit

AU - Koskinen, Lasse

AU - Siitari-Kauppi, Marja

PY - 2019/2

Y1 - 2019/2

N2 - 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.

AB - 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.

KW - C-14-PMMA autoradiography

KW - CONNECTED POROSITY

KW - Crystalline rock

KW - Crystalline rocks

KW - DIFFUSION EXPERIMENT

KW - Energy dispersive X-ray spectroscopy

KW - FRACTURES

KW - Heterogeneity

KW - IMPREGNATION

KW - INTERFACE

KW - MICROTOMOGRAPHY

KW - OLKILUOTO

KW - Pore structure

KW - Porosity

KW - RESOLUTION

KW - SCALE

KW - SIMULATION APPROACH

KW - Scanning electron microscopy

KW - X-ray micro computed tomography

KW - 116 Chemical sciences

KW - 1171 Geosciences

U2 - 10.1016/j.apgeochem.2018.12.024

DO - 10.1016/j.apgeochem.2018.12.024

M3 - Article

VL - 101

SP - 50

EP - 61

JO - Applied Geochemistry

JF - Applied Geochemistry

SN - 0883-2927

ER -