DOI: 10.1002/2015GL063161
论文题名: Pressurized magma reservoir within the east rift zone of Ki¯lauea Volcano, Hawai'i: Evidence for relaxed stress changes from the 1975 Kalapana earthquake
作者: Baker S. ; Amelung F.
刊名: Geophysical Research Letters
ISSN: 0094-8851
EISSN: 1944-8582
出版年: 2015
卷: 42, 期: 6 起始页码: 1758
结束页码: 1765
语种: 英语
英文关键词: InSAR
; Ki¯lauea
; Na¯pau
Scopus关键词: Digital storage
; Earthquakes
; Pressurization
; Sea level
; Crustal reservoirs
; Elastic modeling
; Extensional stress
; InSAR
; Magma intrusion
; Magma reservoirs
; Multiple satellites
; Relaxed stress
; Sodium
; compressibility
; crater
; igneous intrusion
; magma chamber
; rift zone
; stress change
; volcanic eruption
; Hawaii [(ISL) Hawaiian Islands]
; Hawaii [United States]
; Hawaii [United States]
; Hawaiian Islands
; Kilauea
; United States
英文摘要: We use 2000-2012 InSAR data from multiple satellites to investigate magma storage in Ki¯lauea's east rift zone (ERZ). The study period includes a surge in magma supply rate and intrusion-eruptions in 2007 and 2011. The Kupaianaha area inflated by ∼5cm prior to the 2007 intrusion and the Na¯pau Crater area by ∼10cm following the 2011 intrusion. For the Na¯pau Crater area, elastic modeling suggests an inflation source at 5±2km depth or more below sea level. The reservoir is located in the deeper section of the rift zone for which secular magma intrusion was inferred for the period following the 1975 Mw 7.7 décollement earthquake. Reservoir pressurization suggests that in this section of the ERZ, extensional stress changes due to the earthquake have largely been compensated for and that this section is approaching its pre-1975 state. Reservoir pressurization also puts the molten core model into question for this section of Ki¯lauea's rift zone. Key Points InSAR data provide evidence for two pressurized magma bodies in the middle ERZ The stress state has changed from extensional to compressional in the middle ERZ The Na¯pau Crater source is fed from an oceanic crustal reservoir ©2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84927739512&doi=10.1002%2f2015GL063161&partnerID=40&md5=ac51e556e80d4e3920fd581b8400b78f
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8467
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: Division of Marine Geology and Geophysics, RSMAS, University of Miami, Coral Gables, FL, United States
Recommended Citation:
Baker S.,Amelung F.. Pressurized magma reservoir within the east rift zone of Ki¯lauea Volcano, Hawai'i: Evidence for relaxed stress changes from the 1975 Kalapana earthquake[J]. Geophysical Research Letters,2015-01-01,42(6).