Rock-Fluid Interaction Along Seismogenic Faults Infered from Clay Minerals in Okitsu Mélange, the Cretaceous Shimanto Belt, SW Japan

摘要: Rock-fluid interactions along seismogenic faults are significant issues, because they strongly related to mechanisms and also modifications of the fault itself. Various for seismogenesis have been proposed, such as frictional melting (Sibson, 1975; Spray, 1992), thermal pressurization (Mase Smith, 1987; Melosh, 1979; O'Hara et al., 2006; Sibson, 1977; Wibberley Shimamoto, 2005), acoustic fluidization (Melosh, Otsuki 2003), elastohydrodynamic lubrication (Brodsky Kanamori, 2001), silica gel (Di Toro 2006). Some these heating. Heating signatures from natural well-studied on basis remaining grains in pseudotachylyte (Ikesawa 2003; Ujiie 2007), vitrinite reflectance anomaly (O'Hara 2006), borehole logging (Kano Mishima Tanaka decomposition paramagnetic minerals (Mishima distribution minor elements (Ishikawa 2008). In addition effects, some rock-fluid interactions. Studies focusing rockfluid fossil conducted at major zones. These include Nojima Japan (an intra-crustal fault), where bulk rock chemistry analysis was used (Tanaka Chi-Chi Taiwan active subduction plate boundary which studied its clay characteristics (Hashimoto 2008; Hashimoto Mugi melange, Shimanto Belt, Japan, again using 2009), an out sequence thrust element distributions (Honda 2011; Yamaguchi 2011). this study, we focused within interface, order understand fault. Clay commonly produced faults, possibly by alteration fine-grained abraded host materials due interaction. The comparison with those rocks, provide clues