SCSIO OpenIR  > 中科院边缘海地质重点实验室
Expulsion of a geopressured hydrothermal system associated with destructive earthquakes and buried active faults in the Shinanogawa Seismic Belt, Japan
Xu, HL; Oki, Y; hlxu@scsio.ac.cn
2004
Source PublicationISLAND ARC
ISSN1038-4871
Volume13Issue:2Pages:333-345
AbstractThe Shinanogawa Seismic Belt in the Northern Fossa Magna, Honshu Island, Japan, extends along the Shinano River, bounding the Eurasian Plate and the Okhotsk Plate. The geopressured hydrothermal system occurs widely in the Northern Fossa Magna region. Many destructive earthquakes are related to the activity of this system in the Shinanogawa Seismic Belt. Expulsion of a geopressured hydrothermal system and rising from depth along an active fault triggers the occurrence of an earthquake and opens the fault as a pathway. Anomalous areas in temperature, electrical conductivity and Cl- concentration of groundwater trend north-east in a linear distribution, and convincingly demonstrate the presence of a buried active fault at the epicentral area of the destructive earthquake in the Shinanogawa Seismic Belt. The distribution of the major axis of the anomalous area in groundwater temperature shows a strong positive relationship with earthquake magnitude, which means that the distribution of this area may indicate the scale of earthquake fault. The linearly anomalous areas in groundwater temperature, resulting from the percolation of a geopressured hydrothermal system, that have no record of previous destructive earthquake are predicted to be areas where destructive earthquakes could occur in the future. Four potential earthquake areas are proposed and discussed in this paper, based on re-examination of active faults and seismicity in the Shinanogawa Seismic Belt.
DepartmentChinese 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
KeywordActive Fault Fossa Magna Geopressured Hydrothermal System Potential Earthquake Area Shinanogawa Seismic Belt Water Chemistry
Subject AreaGeosciences, Multidisciplinary
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Indexed Bysci
Funding Project海洋地质
WOS IDWOS:000221081200001
Citation statistics
Document Type期刊论文
Identifierhttp://ir.scsio.ac.cn/handle/344004/4814
Collection中科院边缘海地质重点实验室
Corresponding Authorhlxu@scsio.ac.cn
Recommended Citation
GB/T 7714
Xu, HL,Oki, Y,hlxu@scsio.ac.cn. Expulsion of a geopressured hydrothermal system associated with destructive earthquakes and buried active faults in the Shinanogawa Seismic Belt, Japan[J]. ISLAND ARC,2004,13(2):333-345.
APA Xu, HL,Oki, Y,&hlxu@scsio.ac.cn.(2004).Expulsion of a geopressured hydrothermal system associated with destructive earthquakes and buried active faults in the Shinanogawa Seismic Belt, Japan.ISLAND ARC,13(2),333-345.
MLA Xu, HL,et al."Expulsion of a geopressured hydrothermal system associated with destructive earthquakes and buried active faults in the Shinanogawa Seismic Belt, Japan".ISLAND ARC 13.2(2004):333-345.
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