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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
发表期刊ISLAND ARC
ISSN1038-4871
卷号13期号:2页码:333-345
摘要The 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.
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Active Fault Fossa Magna Geopressured Hydrothermal System Potential Earthquake Area Shinanogawa Seismic Belt Water Chemistry
学科领域Geosciences, Multidisciplinary
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收录类别sci
资助项目海洋地质
WOS记录号WOS:000221081200001
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文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/4814
专题中科院边缘海地质重点实验室
通讯作者hlxu@scsio.ac.cn
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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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