Hydrologic properties and structure of the Mozumi Fault, central Japan
Analyses of rocks from the Active Fault Survey Tunnel (AFST) provides insight into the structure and hydrogeology of the northeast‐trending Mozumi‐Sukenobu fault, an active strike‐slip fault with 125 to 500 m of right‐lateral slip in central Japan. Interlayered regions of sub‐vertical permeability z...
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| Veröffentlicht in: | Geophysical research letters 2003-03, Vol.30 (6), p.MOZ1.1-n/a |
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| creator | Forster, Craig B. Evans, James P. Tanaka, Hidemi Jeffreys, Ronald Nohara, Tsuyoshi |
| description | Analyses of rocks from the Active Fault Survey Tunnel (AFST) provides insight into the structure and hydrogeology of the northeast‐trending Mozumi‐Sukenobu fault, an active strike‐slip fault with 125 to 500 m of right‐lateral slip in central Japan. Interlayered regions of sub‐vertical permeability zones formed by cataclasis and slip on clay‐rich foliated zones. Core samples range from 10−19 m2 to almost 10−13 m2. CFC analyses of waters from the fault zone show that water entering the tunnel is 27–36 years old, yielding a bulk fault permeability of 10−14 to 10−15 m2. The data support a fault zone model of a fluid‐saturated, low‐velocity zone with a sharp velocity contrasting with the protolith. Pore‐fluid pressures could build and dissipate in isolated high permeability pods 10's–100's m in dimension. |
| doi_str_mv | 10.1029/2002GL014904 |
| format | Article |
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Interlayered regions of sub‐vertical permeability zones formed by cataclasis and slip on clay‐rich foliated zones. Core samples range from 10−19 m2 to almost 10−13 m2. CFC analyses of waters from the fault zone show that water entering the tunnel is 27–36 years old, yielding a bulk fault permeability of 10−14 to 10−15 m2. The data support a fault zone model of a fluid‐saturated, low‐velocity zone with a sharp velocity contrasting with the protolith. Pore‐fluid pressures could build and dissipate in isolated high permeability pods 10's–100's m in dimension.</description><identifier>ISSN: 0094-8276</identifier><identifier>EISSN: 1944-8007</identifier><identifier>DOI: 10.1029/2002GL014904</identifier><identifier>CODEN: GPRLAJ</identifier><language>eng</language><publisher>Washington, DC: Blackwell Publishing Ltd</publisher><subject>Earth sciences ; Earth, ocean, space ; Exact sciences and technology ; Freshwater ; Hydrogeology ; Hydrology. Hydrogeology ; Tectonics. Structural geology. 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Res. Lett</addtitle><description>Analyses of rocks from the Active Fault Survey Tunnel (AFST) provides insight into the structure and hydrogeology of the northeast‐trending Mozumi‐Sukenobu fault, an active strike‐slip fault with 125 to 500 m of right‐lateral slip in central Japan. Interlayered regions of sub‐vertical permeability zones formed by cataclasis and slip on clay‐rich foliated zones. Core samples range from 10−19 m2 to almost 10−13 m2. CFC analyses of waters from the fault zone show that water entering the tunnel is 27–36 years old, yielding a bulk fault permeability of 10−14 to 10−15 m2. The data support a fault zone model of a fluid‐saturated, low‐velocity zone with a sharp velocity contrasting with the protolith. Pore‐fluid pressures could build and dissipate in isolated high permeability pods 10's–100's m in dimension.</description><subject>Earth sciences</subject><subject>Earth, ocean, space</subject><subject>Exact sciences and technology</subject><subject>Freshwater</subject><subject>Hydrogeology</subject><subject>Hydrology. Hydrogeology</subject><subject>Tectonics. Structural geology. 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Hydrogeology</topic><topic>Tectonics. Structural geology. Plate tectonics</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Forster, Craig B.</creatorcontrib><creatorcontrib>Evans, James P.</creatorcontrib><creatorcontrib>Tanaka, Hidemi</creatorcontrib><creatorcontrib>Jeffreys, Ronald</creatorcontrib><creatorcontrib>Nohara, Tsuyoshi</creatorcontrib><collection>Istex</collection><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Water Resources Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Geophysical research letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Forster, Craig B.</au><au>Evans, James P.</au><au>Tanaka, Hidemi</au><au>Jeffreys, Ronald</au><au>Nohara, Tsuyoshi</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Hydrologic properties and structure of the Mozumi Fault, central Japan</atitle><jtitle>Geophysical research letters</jtitle><addtitle>Geophys. 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| source | Wiley Online Library Journals Frontfile Complete; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; Wiley Free Content; Wiley-Blackwell AGU Digital Library |
| subjects | Earth sciences Earth, ocean, space Exact sciences and technology Freshwater Hydrogeology Hydrology. Hydrogeology Tectonics. Structural geology. Plate tectonics |
| title | Hydrologic properties and structure of the Mozumi Fault, central Japan |
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