DOI: 10.1002/2016GL070315
论文题名: Crustal magma pathway beneath Aso caldera inferred from three-dimensional electrical resistivity structure
作者: Hata M. ; Takakura S. ; Matsushima N. ; Hashimoto T. ; Utsugi M.
刊名: Geophysical Research Letters
ISSN: 0094-8514
EISSN: 1944-8245
出版年: 2016
卷: 43, 期: 20 起始页码: 10720
结束页码: 10727
语种: 英语
英文关键词: Aso caldera
; crustal structure
; earthquake cluster
; electrical resistivity imaging
; magnetotellurics
; upwelling magma
Scopus关键词: Earthquakes
; Geophysics
; Imaging techniques
; Magnetotellurics
; Aso caldera
; Crustal structure
; Electrical resistivity imaging
; Electrical resistivity structures
; Magnetotelluric measurement
; Phreatomagmatic eruption
; Three-dimensional model
; upwelling magma
; Electric conductivity
英文摘要: At Naka-dake cone, Aso caldera, Japan, volcanic activity is raised cyclically, an example of which was a phreatomagmatic eruption in September 2015. Using a three-dimensional model of electrical resistivity, we identify a magma pathway from a series of northward dipping conductive anomalies in the upper crust beneath the caldera. Our resistivity model was created from magnetotelluric measurements conducted in November–December 2015; thus, it provides the latest information about magma reservoir geometry beneath the caldera. The center of the conductive anomalies shifts from the north of Naka-dake at depths >10 km toward Naka-dake, along with a decrease in anomaly depths. The melt fraction is estimated at 13–15% at ~2 km depth. Moreover, these anomalies are spatially correlated with the locations of earthquake clusters, which are distributed within resistive blocks on the conductive anomalies in the northwest of Naka-dake but distributed at the resistive sides of resistivity boundaries in the northeast. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84995549317&doi=10.1002%2f2016GL070315&partnerID=40&md5=6ec49d7f06c3f4d4451c3e8548626bb0
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9477
Appears in Collections: 科学计划与规划 气候变化与战略
There are no files associated with this item.
作者单位: National Institute of Advanced Industrial Science and Technology, Tsukuba, Japan
Recommended Citation:
Hata M.,Takakura S.,Matsushima N.,et al. Crustal magma pathway beneath Aso caldera inferred from three-dimensional electrical resistivity structure[J]. Geophysical Research Letters,2016-01-01,43(20).