Abstract
The Hakata hot springs area is located in Fukuoka City, which is in the southwestern part of Japan. Gamma-ray and gravity surveys were conducted to understand the relationship between the low-temperature hydrothermal systems and geophysical data of the area. The depth of the reservoir basement, which was derived from gravity data, gradually deepens toward the east; it includes some steep depth gradients in the Hakata hot springs area. High intensities of gamma-rays were detected around these gradients. In addition, higher hot spring temperatures and flow rates can be observed in this area. These results indicate that some part of the level of the basement where the hot springs are concentrated is a part of the Kego Fault and is similar to the fracture zone created by past activities of the fault. Moreover, these steep depth gradients act as a path for hot spring water from the deeper side of the granitic body to the surface.
| Original language | English |
|---|---|
| Pages (from-to) | 2289-2304 |
| Number of pages | 16 |
| Journal | Acta Geophysica |
| Volume | 64 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - Dec 1 2016 |
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All Science Journal Classification (ASJC) codes
- Geophysics
Cite this
Interpretation of gravity and gamma-ray spectrometry data in low temperature hydrothermal systems, southeastern part of Fukuoka, Japan. / Nishijima, Jun; Fujimitsu, Yasuhiro.
In: Acta Geophysica, Vol. 64, No. 6, 01.12.2016, p. 2289-2304.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Interpretation of gravity and gamma-ray spectrometry data in low temperature hydrothermal systems, southeastern part of Fukuoka, Japan
AU - Nishijima, Jun
AU - Fujimitsu, Yasuhiro
PY - 2016/12/1
Y1 - 2016/12/1
N2 - The Hakata hot springs area is located in Fukuoka City, which is in the southwestern part of Japan. Gamma-ray and gravity surveys were conducted to understand the relationship between the low-temperature hydrothermal systems and geophysical data of the area. The depth of the reservoir basement, which was derived from gravity data, gradually deepens toward the east; it includes some steep depth gradients in the Hakata hot springs area. High intensities of gamma-rays were detected around these gradients. In addition, higher hot spring temperatures and flow rates can be observed in this area. These results indicate that some part of the level of the basement where the hot springs are concentrated is a part of the Kego Fault and is similar to the fracture zone created by past activities of the fault. Moreover, these steep depth gradients act as a path for hot spring water from the deeper side of the granitic body to the surface.
AB - The Hakata hot springs area is located in Fukuoka City, which is in the southwestern part of Japan. Gamma-ray and gravity surveys were conducted to understand the relationship between the low-temperature hydrothermal systems and geophysical data of the area. The depth of the reservoir basement, which was derived from gravity data, gradually deepens toward the east; it includes some steep depth gradients in the Hakata hot springs area. High intensities of gamma-rays were detected around these gradients. In addition, higher hot spring temperatures and flow rates can be observed in this area. These results indicate that some part of the level of the basement where the hot springs are concentrated is a part of the Kego Fault and is similar to the fracture zone created by past activities of the fault. Moreover, these steep depth gradients act as a path for hot spring water from the deeper side of the granitic body to the surface.
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U2 - 10.1515/acgeo-2016-0113
DO - 10.1515/acgeo-2016-0113
M3 - Article
AN - SCOPUS:85008704996
VL - 64
SP - 2289
EP - 2304
JO - Acta Geophysica
JF - Acta Geophysica
SN - 1895-6572
IS - 6
ER -