DOI: 10.1002/grl.50155
论文题名: Constraints on the upper crustal magma reservoir beneath Yellowstone Caldera inferred from lake-seiche induced strain observations
作者: Luttrell K. ; Mencin D. ; Francis O. ; Hurwitz S.
刊名: Geophysical Research Letters
ISSN: 0094-9329
EISSN: 1944-9060
出版年: 2013
卷: 40, 期: 3 起始页码: 501
结束页码: 506
语种: 英语
英文关键词: Borehole Strainmeter
; Seiche Waves
; Yellowstone Caldera
; Yellowstone Lake
Scopus关键词: Lakes
; Molten materials
; Sedimentary rocks
; Strain measurement
; Elastic models
; Magma reservoirs
; Seismic tomography
; Strain amplitude
; Strain induced
; Strain-meter
; Viscoelastic models
; Yellowstones
; Reservoirs (water)
; amplitude
; borehole
; elasticity
; magma
; reservoir characterization
; seiche
; seismic tomography
; shore (nonmarine)
; solid Earth
; strain
; upper crust
; viscoelasticity
; United States
; Wyoming
; Yellowstone Caldera
英文摘要: Seiche waves in Yellowstone Lake with a ~78-minute period and heights <10 cm act as a load on the solid earth observed by borehole strainmeters with subnanostrain sensitivity throughout the Yellowstone Caldera. The far-field strain induced by the load of the seiche waves calculated with a homogeneous elastic model representing the upper crust is more than an order of magnitude smaller than the measured strain amplitude ~30 km from the lake shore. By contrast, the observed far field strain amplitudes are consistent with the seiche load on a two-layered viscoelastic model representing an elastic upper crust overlying a partially molten body deeper than 3-6 km with Maxwell viscosity less than 1011 Pa s. These strain observations and models provide independent evidence for the presence of partially molten material in the upper crust, consistent with seismic tomography studies that inferred 10%-30% melt fraction in the upper crust. Key Points Strain induced by seiche waves in Yellowstone Lake is observed 30 km away Observed strainfield requires some support from an upper crustal magma reservoir Top of shallowest upper crustal partial melt is at 3 - 6 km depth ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84878194534&doi=10.1002%2fgrl.50155&partnerID=40&md5=fe848b6598886c571a33b41b91bf682a
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6593
Appears in Collections: 气候减缓与适应
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作者单位: U. S. Geological Survey, MS 910, 345 Middlefield Rd., Menlo Park, CA 94025, United States
Recommended Citation:
Luttrell K.,Mencin D.,Francis O.,et al. Constraints on the upper crustal magma reservoir beneath Yellowstone Caldera inferred from lake-seiche induced strain observations[J]. Geophysical Research Letters,2013-01-01,40(3).