Helium in Porewater and Rocks of Crystalline Bedrock from the Fennoscandian Shield, Olkiluoto (Finland)
Dissolved noble gases in matrix porewaters of low-permeable crystalline rocks are useful tracers for investigating porewater migration and interactions between porewater and groundwater. Samples from the 1160 m deep OL-KR56 borehole, drilled at the Olkiluoto site (southwestern Finland), have been an...
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ftunivbern:oai:boris.unibe.ch:93908 2023-08-20T04:06:27+02:00 Helium in Porewater and Rocks of Crystalline Bedrock from the Fennoscandian Shield, Olkiluoto (Finland) Rufer, Daniel Waber, Niklaus Pitkänen, Petteri Eichinger, Florian 2017 application/pdf https://boris.unibe.ch/93908/1/Rufer_etal_PEPS_2017.pdf https://boris.unibe.ch/93908/ eng eng Elsevier https://boris.unibe.ch/93908/ info:eu-repo/semantics/openAccess Rufer, Daniel; Waber, Niklaus; Pitkänen, Petteri; Eichinger, Florian (2017). Helium in Porewater and Rocks of Crystalline Bedrock from the Fennoscandian Shield, Olkiluoto (Finland). Procedia earth and planetary science, 17, pp. 762-765. Elsevier 10.1016/j.proeps.2017.01.019 <http://dx.doi.org/10.1016/j.proeps.2017.01.019> 550 Earth sciences & geology info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion PeerReviewed 2017 ftunivbern https://doi.org/10.1016/j.proeps.2017.01.019 2023-07-31T21:32:17Z Dissolved noble gases in matrix porewaters of low-permeable crystalline rocks are useful tracers for investigating porewater migration and interactions between porewater and groundwater. Samples from the 1160 m deep OL-KR56 borehole, drilled at the Olkiluoto site (southwestern Finland), have been analysed for concentrations and isotope signatures of helium in porewater, groundwater and in the rock matrix. These are the first 3He/4He ratios combined with 4He concentrations in porewaters and rocks from the Fennoscandian Shield. High 4He porewater concentrations suggest long porewater residence times, while concentration differences of one order of magnitude between porewater and groundwater indicate a transient state between these reservoirs. Concentrations of 4He in porewater show small variations with depth, which are mimicked in the concentrations of conservative chemical tracers as well as in 4He concentrations of groundwaters from various regional boreholes. 3He/4He ratios in porewaters are higher than in the rock matrix, requiring either fractionation during redistribution of He between these reservoirs or the addition of an isotopically light component. Article in Journal/Newspaper Fennoscandian BORIS (Bern Open Repository and Information System, University of Bern) Procedia Earth and Planetary Science 17 762 765 |
institution |
Open Polar |
collection |
BORIS (Bern Open Repository and Information System, University of Bern) |
op_collection_id |
ftunivbern |
language |
English |
topic |
550 Earth sciences & geology |
spellingShingle |
550 Earth sciences & geology Rufer, Daniel Waber, Niklaus Pitkänen, Petteri Eichinger, Florian Helium in Porewater and Rocks of Crystalline Bedrock from the Fennoscandian Shield, Olkiluoto (Finland) |
topic_facet |
550 Earth sciences & geology |
description |
Dissolved noble gases in matrix porewaters of low-permeable crystalline rocks are useful tracers for investigating porewater migration and interactions between porewater and groundwater. Samples from the 1160 m deep OL-KR56 borehole, drilled at the Olkiluoto site (southwestern Finland), have been analysed for concentrations and isotope signatures of helium in porewater, groundwater and in the rock matrix. These are the first 3He/4He ratios combined with 4He concentrations in porewaters and rocks from the Fennoscandian Shield. High 4He porewater concentrations suggest long porewater residence times, while concentration differences of one order of magnitude between porewater and groundwater indicate a transient state between these reservoirs. Concentrations of 4He in porewater show small variations with depth, which are mimicked in the concentrations of conservative chemical tracers as well as in 4He concentrations of groundwaters from various regional boreholes. 3He/4He ratios in porewaters are higher than in the rock matrix, requiring either fractionation during redistribution of He between these reservoirs or the addition of an isotopically light component. |
format |
Article in Journal/Newspaper |
author |
Rufer, Daniel Waber, Niklaus Pitkänen, Petteri Eichinger, Florian |
author_facet |
Rufer, Daniel Waber, Niklaus Pitkänen, Petteri Eichinger, Florian |
author_sort |
Rufer, Daniel |
title |
Helium in Porewater and Rocks of Crystalline Bedrock from the Fennoscandian Shield, Olkiluoto (Finland) |
title_short |
Helium in Porewater and Rocks of Crystalline Bedrock from the Fennoscandian Shield, Olkiluoto (Finland) |
title_full |
Helium in Porewater and Rocks of Crystalline Bedrock from the Fennoscandian Shield, Olkiluoto (Finland) |
title_fullStr |
Helium in Porewater and Rocks of Crystalline Bedrock from the Fennoscandian Shield, Olkiluoto (Finland) |
title_full_unstemmed |
Helium in Porewater and Rocks of Crystalline Bedrock from the Fennoscandian Shield, Olkiluoto (Finland) |
title_sort |
helium in porewater and rocks of crystalline bedrock from the fennoscandian shield, olkiluoto (finland) |
publisher |
Elsevier |
publishDate |
2017 |
url |
https://boris.unibe.ch/93908/1/Rufer_etal_PEPS_2017.pdf https://boris.unibe.ch/93908/ |
genre |
Fennoscandian |
genre_facet |
Fennoscandian |
op_source |
Rufer, Daniel; Waber, Niklaus; Pitkänen, Petteri; Eichinger, Florian (2017). Helium in Porewater and Rocks of Crystalline Bedrock from the Fennoscandian Shield, Olkiluoto (Finland). Procedia earth and planetary science, 17, pp. 762-765. Elsevier 10.1016/j.proeps.2017.01.019 <http://dx.doi.org/10.1016/j.proeps.2017.01.019> |
op_relation |
https://boris.unibe.ch/93908/ |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/j.proeps.2017.01.019 |
container_title |
Procedia Earth and Planetary Science |
container_volume |
17 |
container_start_page |
762 |
op_container_end_page |
765 |
_version_ |
1774717498539638784 |