Borehole water and hydrologic model around the Nojima fault, SW Japan
Tectonophysics(2007)
Abstract
The active fault drilling at Nojima Hirabayashi after the 1995 Hyogoken-nanbu (Kobe) earthquake (MJMA=7.2) provides us with a unique opportunity to investigate subsurface fault structure and the in-situ properties of fault and fluid. The borehole intersected the fault gouge of the Nojima fault at a depth interval of 623 m to 625 m. The lithology is mostly Cretaceous granodiorite with some porphyry dikes.
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Key words
Carbonate,Stable isotope,Water-rock interaction,Geochemical speciation
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