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DOI | 10.1002/2017GL075697 |
Pressure-Driven Poiseuille Flow: A Major Component of the Torque-Balance Governing Pacific Plate Motion | |
Stotz, I. L.1; Iaffaldano, G.1; Davies, D. R.2 | |
2018-01-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS
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ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2018 |
卷号 | 45期号:1页码:117-125 |
文章类型 | Article |
语种 | 英语 |
国家 | Denmark; Australia |
英文摘要 | The Pacific Plate is thought to be driven mainly by slab pull, associated with subduction along the Aleutians-Japan, Marianas-Izu-Bonin, and Tonga-Kermadec trenches. This implies that viscous flow within the sub-Pacific asthenosphere is mainly generated by overlying plate motion (i.e., Couette flow) and that the associated shear stresses at the lithosphere's base are resisting such motion. Recent studies on glacial isostatic adjustment and lithosphere dynamics provide tighter constraints on the viscosity and thickness of Earth's asthenosphere and, therefore, on the amount of shear stress that asthenosphere and lithosphere mutually exchange, by virtue of Newton's third law of motion. In light of these constraints, the notion that subduction is the main driver of present-day Pacific Plate motion becomes somewhat unviable, as the pulling force that would be required by slabs exceeds the maximum available from their negative buoyancy. Here we use coupled global models of mantle and lithosphere dynamics to show that the sub-Pacific asthenosphere features a significant component of pressure-driven (i.e., Poiseuille) flow and that this has driven at least 50% of the Pacific Plate motion since, at least, 15 Ma. A corollary of our models is that a sublithospheric pressure difference as high as +/- 50 MPa is required across the Pacific domain. |
英文关键词 | Pacific Plate Poiseuille flow torque balance |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000423431800014 |
WOS关键词 | SLAB PULL ; MANTLE ; VISCOSITY ; MODELS ; LITHOSPHERE ; SUBDUCTION ; STRENGTH ; FAULT ; TIME |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/27962 |
专题 | 气候变化 |
作者单位 | 1.Univ Copenhagen, Dept Geosci & Nat Resource Management, Copenhagen, Denmark; 2.Australian Natl Univ, Res Sch Earth Sci, Canberra, ACT, Australia |
推荐引用方式 GB/T 7714 | Stotz, I. L.,Iaffaldano, G.,Davies, D. R.. Pressure-Driven Poiseuille Flow: A Major Component of the Torque-Balance Governing Pacific Plate Motion[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(1):117-125. |
APA | Stotz, I. L.,Iaffaldano, G.,&Davies, D. R..(2018).Pressure-Driven Poiseuille Flow: A Major Component of the Torque-Balance Governing Pacific Plate Motion.GEOPHYSICAL RESEARCH LETTERS,45(1),117-125. |
MLA | Stotz, I. L.,et al."Pressure-Driven Poiseuille Flow: A Major Component of the Torque-Balance Governing Pacific Plate Motion".GEOPHYSICAL RESEARCH LETTERS 45.1(2018):117-125. |
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