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Expulsion of geopressured hydrothermal system along active faults and its relation to the occurrence of earthquakes in the Shinanogawa seismic belt, Japan
Xu, HL; Oki, Y; Sato, O; hlxu@scsio.ac.cn
2005
发表期刊SCIENCE IN CHINA SERIES D-EARTH SCIENCES
ISSN1006-9313
卷号48期号:2页码:273-281
摘要The 1995 Northern Niigata Earthquake (M 6.0) occurred at a shallow depth in the Niigata seismic gap. The anomaly areas in temperature, electrical conductivity and Cl- concentration of groundwater trend northeast as linear distribution in the epicentral area and are approximately coincident with the area of the seismic intensity 6 (JMA scale). The distributions of seismic intensity 6 and groundwater anomalies convincingly imaged the presence of a buried active fault beneath the epicentral area. The occurrence of this earthquake and the anomalies of groundwater were related to the expulsion of geopressured hydrothermal system (GHS). All epicenters of the destructive earthquakes along the Shinanogawa seismic belt are actually located in the buried active fault zones characterized by the areas of temperature and geochemical anomalies of groundwater. These earthquakes might have been triggered by the activity of GHS. The expulsion of GHS along an active fault in combination with the thermal softening of fault zone attributed to high rock temperature may reduce fracture strength of the rock, and trigger earthquake occurrence. The dimension of the anomaly area of groundwater temperature at the epicentral area reflected the scale of the earthquake fault. The linear anomaly areas of groundwater resulting from the expulsion of GHS and having no historical destructive earthquake are of the predicated areas of future destructive earthquakes. Monitoring of groundwater conditions in these areas may provide useful information regarding the future occurrence of earthquakes.
部门归属Chinese Acad Sci, S China Sea Inst Oceanol, Lab Marginal Sea Geol, Guangzhou 510301, Peoples R China; Chinese Acad Sci, Guangzhou Inst Geochem, Guangzhou 510301, Peoples R China; Niigata Univ, Res Inst Hazards Snowy Areas, Niigata 9502181, Japan
关键词Shinanogawa Seismic Belt 1995 Northern Niigata Earthquake Geopressured Hydrothermal System (Ghs) Buried Active Fault Expulsion Of Ghs
学科领域Geosciences, Multidisciplinary
收录类别sci
资助项目海洋地质
WOS记录号WOS:000228190600015
引用统计
被引频次:1[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/4872
专题中科院边缘海地质重点实验室
通讯作者hlxu@scsio.ac.cn
推荐引用方式
GB/T 7714
Xu, HL,Oki, Y,Sato, O,et al. Expulsion of geopressured hydrothermal system along active faults and its relation to the occurrence of earthquakes in the Shinanogawa seismic belt, Japan[J]. SCIENCE IN CHINA SERIES D-EARTH SCIENCES,2005,48(2):273-281.
APA Xu, HL,Oki, Y,Sato, O,&hlxu@scsio.ac.cn.(2005).Expulsion of geopressured hydrothermal system along active faults and its relation to the occurrence of earthquakes in the Shinanogawa seismic belt, Japan.SCIENCE IN CHINA SERIES D-EARTH SCIENCES,48(2),273-281.
MLA Xu, HL,et al."Expulsion of geopressured hydrothermal system along active faults and its relation to the occurrence of earthquakes in the Shinanogawa seismic belt, Japan".SCIENCE IN CHINA SERIES D-EARTH SCIENCES 48.2(2005):273-281.
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