Terrestrial heat flow at Hirabayashi on Awaji Island, south-west Japan

Kitajima, Takuma; Kobayashi, Yoji; Ikeda, Ryuji; Iio, Yoshihisa; Omura, Kentaro

doi:10.1046/j.1440-1738.2001.00330.x

Cited by 17 publications

(16 citation statements)

References 11 publications

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“…We showed that the cut-off depth could be explained by the assumption that the deformation is localized in a narrow zone of a downward extension of the seismogenic fault even in the intraplate region. This result was obtained only at one site, but it may be universal in the intraplate region given evidence that cut-off depths in other regions in the Japanese Island arcs also have a tendency to coincide with a depth of approximately 600K (Ito, 1990;Kitajima et al, 2001). This new scope is important in considering the deformation process of intraplate regions, and in understanding the generating process of intraplate earthquakes.…”

Section: Discussionmentioning

confidence: 81%

“…We obtained the following values: Q(0) of 56.6 (mW/m 2 ), K of 1.22 to 3.09 (W/mK), and A(0) of 1.1 to 2.0 (μW/m 3 ) (Kitajima et al, 2001). The value of D was not estimated around the Nojima fault; it was assumed to be from 5 to 10 km in this study, following estimates of 7.8 km at the Hidaka, Japan region (Furukawa and Uyeda, 1986), and 10 km at the San Andreas (Lachenbruch, 1970).…”

Section: Temperature Profilementioning

confidence: 94%

“…Temperatures from the surface to a depth of 1100 m were measured without any disturbances by the drilling (Kitajima et al, 2001). Thermal conductivities and heat productions were also measured from a collection of core samples (Kitajima et al, 2001).…”

Section: Temperature Profilementioning

confidence: 99%

“…A(0) was set as 1.0, 1.5, or 2.0 according to the obtained values. K was set as 3.0, almost the upper limit of the obtained value, because values of K showed a tendency to increase with bulk density (Kitajima et al, 2001).…”

Section: Temperature Profilementioning

confidence: 99%

“…Two extreme cases are also shown. The first extreme case is that (Kitajima et al, 2001). Q(0) and K are set as 56.6 (mW/m 2 ) and 3.0 (W/mK), respectively.…”

Section: Temperature Profilementioning

confidence: 99%

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Is the plastic flow uniformly distributed below the seismogenic region?

Iio

Kobayashi

2014

Earth Planet Sp

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The cut-off depth of seismicity in and around the Nojima fault broken by the 1995 Kobe earthquake occurring in the intraplate Japan was compared with a brittle-ductile transition depth of the widely-accepted strength profile model of the crust. It was found that the cut-off depth is much deeper than the transition depth under the assumption that wet granite is deformed at a strain rate of 10 −15 /s. Such a small strain rate implies that the plastic flow is uniformly distributed below the seismogenic region. When the strain rate is assumed to be greater than 10 −13 , the cut-off depth can be attributed to the transition depth. This suggests that deformation is localized in a narrow fault zone below the seismogenic region even in the intraplate region.

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Section: Discussionmentioning

confidence: 81%

Section: Temperature Profilementioning

confidence: 94%

Section: Temperature Profilementioning

confidence: 99%

Section: Temperature Profilementioning

confidence: 99%

“…Two extreme cases are also shown. The first extreme case is that (Kitajima et al, 2001). Q(0) and K are set as 56.6 (mW/m 2 ) and 3.0 (W/mK), respectively.…”

Section: Temperature Profilementioning

confidence: 99%

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