TY - JOUR
T1 - Relation between structure and low-temperature geothermal systems in Fukuoka city, southwestern Japan
AU - Saibi, Hakim
AU - Nishijima, Jun
AU - Hirano, Tomohiro
AU - Fujimitsu, Yasuhiro
AU - Ehara, Sachio
N1 - Funding Information:
Acknowledgments. The first author acknowledges the financial support of the Japan Society for the Promotion of Science (JSPS) for research activities in Japan. The authors greatly appreciate the constructive and thoughtful comments of the two anonymous reviewers. We also thank Dr. Akira Takada (Geological Survey of Japan, AIST, Tsukuba), EPS editor for his comments and suggestions. This study is supported by KAKENHI (Grant-in-Aid for Exploratory Research by JSPS) No. 17651100 (Principal Researcher: Yasuhiro Fujimitsu).
PY - 2008
Y1 - 2008
N2 - The Fukuoka area is located in the Southwestern part of Japan. The Yokote-Ijiri area, located in the southern part of Fukuoka city, has several low-temperature geothermal systems, including eleven hot springs. From 1996 to 2008, the Fukuoka area was investigated by gravity survey, using Scintrex CG-3 and CG-3M gravimeters, in an attempt to delineate its subsurface structure. The surveys were intended to improve the understanding of the relation between the geothermal systems and the subsurface structure as well as to locate the active faults in the surveyed area, which are responsible for generating large earthquakes. The gravity data were analyzed using integrated gradient interpretation techniques, such as the Horizontal Gradient (HG), Tilt Derivative (TDR), and Euler deconvolution methods. With these techniques, many faults were detected, including the famous Kego fault, which is an active fault in Fukuoka city. A 2-D gravity model was constructed to show the relationship between the faults and the geothermal systems. The results of the present study will hopefully lead to an understanding of the relationships between the interpreted faults and the location of the low-temperature geothermal systems and possibly aid in future geothermal exploration of the area.
AB - The Fukuoka area is located in the Southwestern part of Japan. The Yokote-Ijiri area, located in the southern part of Fukuoka city, has several low-temperature geothermal systems, including eleven hot springs. From 1996 to 2008, the Fukuoka area was investigated by gravity survey, using Scintrex CG-3 and CG-3M gravimeters, in an attempt to delineate its subsurface structure. The surveys were intended to improve the understanding of the relation between the geothermal systems and the subsurface structure as well as to locate the active faults in the surveyed area, which are responsible for generating large earthquakes. The gravity data were analyzed using integrated gradient interpretation techniques, such as the Horizontal Gradient (HG), Tilt Derivative (TDR), and Euler deconvolution methods. With these techniques, many faults were detected, including the famous Kego fault, which is an active fault in Fukuoka city. A 2-D gravity model was constructed to show the relationship between the faults and the geothermal systems. The results of the present study will hopefully lead to an understanding of the relationships between the interpreted faults and the location of the low-temperature geothermal systems and possibly aid in future geothermal exploration of the area.
KW - Fukuoka city
KW - Gravity
KW - Kego fault
KW - Low-temperature geothermal systems
KW - Structure
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U2 - 10.1186/BF03352833
DO - 10.1186/BF03352833
M3 - Article
AN - SCOPUS:53849088228
SN - 1343-8832
VL - 60
SP - 821
EP - 826
JO - Earth, Planets and Space
JF - Earth, Planets and Space
IS - 8
ER -