DOI: 10.1002/2015GL065802
论文题名: Location and size of the shallow magma reservoir beneath Ki¯lauea caldera, constraints from near-source Vp/Vs ratios
作者: Lin G. ; Amelung F. ; Shearer P.M. ; Okubo P.G.
刊名: Geophysical Research Letters
ISSN: 0094-9285
EISSN: 1944-9016
出版年: 2015
卷: 42, 期: 20 起始页码: 8349
结束页码: 8357
语种: 英语
英文关键词: Kilauea
; magma reservoir
; Vp/Vs
Scopus关键词: Carbon dioxide
; Cracks
; Location
; Shear waves
; Wave propagation
; Compressional waves
; Geodetic observation
; Kilauea
; Magma reservoirs
; Shear wave velocity
; Theoretical modeling
; Vp/Vs
; Waveform cross correlation
; Shear flow
; caldera
; carbon dioxide
; compression
; crack
; fluid flow
; geographical variation
; magma chamber
; rift zone
; S-wave
; size
; volcanic eruption
; wave velocity
; waveform analysis
; Halemaumau Crater
; Hawaii [(ISL) Hawaiian Islands]
; Hawaii [United States]
; Hawaiian Islands
; Kilauea
英文摘要: We present high-resolution compressional wave to shear wave velocity ratios (Vp/Vs) beneath Ki¯lauea's summit caldera by applying an in situ estimation method using waveform cross-correlation data for three similar earthquake clusters. We observe high Vp/Vs ratios (1.832 and 1.852) for two event clusters surrounded by the low background Vp/Vs value of 1.412 at ∼2.1 km depth below the surface. These high and low Vp/Vs ratios can be explained by melt- and CO2-filled cracks, respectively, based on a theoretical crack model. The event cluster with the highest Vp/Vs ratio consists of long-period events that followed the 1997 East Rift Zone eruption, indicating their association with fluid and magma movement. The depths of the two clusters with high Vp/Vs ratios are consistent with the magma reservoir location inferred from geodetic observations. Their locations east and north of Halema'uma'u crater suggest a horizontal extent of a few kilometers for the reservoir. Key Points Low in situ Vp/Vs ratio dominating the summit caldera High in situ Vp/Vs ratios observed east and north of Halema'uma'u crater The anomalous features can be explained by theoretical modeling and consistent with other data © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84946561511&doi=10.1002%2f2015GL065802&partnerID=40&md5=6d5b3ab131f3ed51abecd5f38f153da1
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8901
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Department of Marine Geosciences, Rosenstiel School of Marine and Atmospheric Science, University of Miami, Coral Gables, FL, United States
Recommended Citation:
Lin G.,Amelung F.,Shearer P.M.,et al. Location and size of the shallow magma reservoir beneath Ki¯lauea caldera, constraints from near-source Vp/Vs ratios[J]. Geophysical Research Letters,2015-01-01,42(20).