DOI: 10.1002/2014GL059763
论文题名: Pacific plate-motion change at the time of the Hawaiian-Emperor bend constrains the viscosity of Earth's asthenosphere
作者: Iaffaldano G. ; Lambeck K.
刊名: Geophysical Research Letters
ISSN: 0094-10036
EISSN: 1944-9767
出版年: 2014
卷: 41, 期: 10 起始页码: 3398
结束页码: 3406
语种: 英语
英文关键词: Asthenospheric viscosity
; Glacial rebound
; Pacific plate motion
Scopus关键词: Glacial geology
; Kinematics
; Glacial rebound
; Horizontal shear
; Pacific plates
; Subduction initiation
; Thickness value
; Vertical shear
; Viscous response
; Western Pacific
; Viscosity
; asthenosphere
; glacial rebound
; hot spot
; kinematics
; Pacific plate
; plate motion
; shear
; subduction
; viscosity
; Emperor Seamounts
; Hawaii [United States]
; Pacific Ocean
; Pacific Ocean (West)
; United States
英文摘要: Important constraints on asthenospheric viscosity come primarily from modeling the glacial rebound of the past 20 kyr, but remain somewhat loose because of the intrinsic resolving power of these models. We obtain narrower bounds by building on the notion that the asthenosphere also controls the ability to change plate motions over Myr. We focus on the Pacific kinematic change at the time of the Hawaiian-Emperor bend event, which is linked to the coeval inception of subduction in the Western Pacific. We sample plausible asthenospheric viscosity and thickness values by requiring the rate at which torque varied to generate the observed kinematics consistent with the nature of subduction initiation. Uncertainties on the bend event duration and the occurrence of Pacific hot spots drift do not hamper our results that suggest that the asthenosphere viscous response to vertical shear over kyr is consistent with that to horizontal shear over Myr. © 2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84900931723&doi=10.1002%2f2014GL059763&partnerID=40&md5=86146137b1657936cfa767196efe5885
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7300
Appears in Collections: 气候减缓与适应
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作者单位: Research School of Earth Sciences, Australian National University, Canberra, ACT, Australia
Recommended Citation:
Iaffaldano G.,Lambeck K.. Pacific plate-motion change at the time of the Hawaiian-Emperor bend constrains the viscosity of Earth's asthenosphere[J]. Geophysical Research Letters,2014-01-01,41(10).