气候变化领域集成服务门户(CCPortal): Three-Dimensional Electrical Resistivity Structure Beneath a Volcanically and Seismically Active Island, Kyushu, Southwest Japan Arc

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DOI	10.1029/2019JB017485
	Three-Dimensional Electrical Resistivity Structure Beneath a Volcanically and Seismically Active Island, Kyushu, Southwest Japan Arc
	Hata M.; Munekane H.; Utada H.; Kagiyama T.
发表日期	2020
ISSN	21699313
卷号	125 期号:3
英文摘要	To understand the subduction dynamics around Kyushu Island, Southwest Japan Arc, the distribution of fluids is imaged by resolving three-dimensional (3-D) electrical resistivity structure beneath a subregion the island, including volcanic and nonvolcanic areas. The nonvolcanic region in central Kyushu is situated between two regions with numerous Quaternary volcanic structures along a volcanic front aligned N30°E and related to subduction of the Philippine Sea Plate. Two source areas of slow slip events lie at depths of 20–40 km along the eastern coast of Kyushu, whereas earthquakes spread along the subducting Philippine Sea Plate plane over the eastern coast and toward the volcanic front at depths of 20 to >100 km. Our 3-D resistivity model detects prominent conductors, indicating the presence of fluids, which might control volcanic and seismic activity. The most robust features of the model are three regions of high conductivity. A magma system and a fluid system are imaged as two vertical conductors extending from a depth of ~70 km, both related to slab-derived fluid and located along the volcanic front, beneath the volcanic and nonvolcanic regions, respectively. The third conductor, which suggests the presence of slab-derived fluid and hydrated sediments at the plate interface and the presence of serpentinite in the mantle wedge, appears in an area devoid of slow slip events at depths of <~30 km along the southeastern coast. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	3-D electrical resistivity distribution; fluid distribution; subduction dynamics; volcanic and nonvolcanic regions; volcanic and seismic activity
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187899
作者单位	Earthquake Research Institute, The University of Tokyo, Tokyo, Japan; Geospatial Information Authority of Japan, Tsukuba, Japan; Aso Volcanological Laboratory, Kyoto University, Kumamoto, Japan
推荐引用方式 GB/T 7714	Hata M.,Munekane H.,Utada H.,et al. Three-Dimensional Electrical Resistivity Structure Beneath a Volcanically and Seismically Active Island, Kyushu, Southwest Japan Arc[J],2020,125(3).
APA	Hata M.,Munekane H.,Utada H.,&Kagiyama T..(2020).Three-Dimensional Electrical Resistivity Structure Beneath a Volcanically and Seismically Active Island, Kyushu, Southwest Japan Arc.Journal of Geophysical Research: Solid Earth,125(3).
MLA	Hata M.,et al."Three-Dimensional Electrical Resistivity Structure Beneath a Volcanically and Seismically Active Island, Kyushu, Southwest Japan Arc".Journal of Geophysical Research: Solid Earth 125.3(2020).