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Title: Permeability of Granite Including Macro-Fracture Naturally Filled with Fine-Grained Minerals
Authors: Nara, Yoshitaka  kyouindb  KAKEN_id  orcid https://orcid.org/0000-0002-5717-1420 (unconfirmed)
Kato, Masaji
Niri, Ryuhei
Kohno, Masanori
Sato, Toshinori
Fukuda, Daisuke
Sato, Tsutomu
Takahashi, Manabu
Author's alias: 奈良, 禎太
Keywords: Permeability
granite fracture
clay
mineral vein
Issue Date: Mar-2018
Publisher: Springer International Publishing
Journal title: Pure and Applied Geophysics
Volume: 175
Issue: 3
Start page: 917
End page: 927
Abstract: Information on the permeability of rock is essential for various geoengineering projects, such as geological disposal of radioactive wastes, hydrocarbon extraction, and natural hazard risk mitigation. It is especially important to investigate how fractures and pores influence the physical and transport properties of rock. Infiltration of groundwater through the damage zone fills fractures in granite with fine-grained minerals. However, the permeability of rock possessing a fracture naturally filled with fine-grained mineral grains has yet to be investigated. In this study, the permeabilities of granite samples, including a macro-fracture filled with clay and a mineral vein, are investigated. The permeability of granite with a fine-grained mineral vein agrees well with that of the intact sample, whereas the permeability of granite possessing a macro-fracture filled with clay is lower than that of the macro-fractured sample. The decrease in the permeability is due to the filling of fine-grained minerals and clay in the macro-fracture. It is concluded that the permeability of granite increases due to the existence of the fractures, but decreases upon filling them with fine-grained minerals.
Rights: This is a post-peer-review, pre-copyedit version of an article published in 'Pure and Applied Geophysics'. The final authenticated version is available online at: http://dx.doi.org/10.1007/s00024-017-1704-x.
The full-text file will be made open to the public on 01 March 2019 in accordance with publisher's 'Terms and Conditions for Self-Archiving'.
This is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。
URI: http://hdl.handle.net/2433/230347
DOI(Published Version): 10.1007/s00024-017-1704-x
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