| DOI: | 10.1002/2016GL068688
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| 论文题名: | Linear analysis of melt band formation in a mid-ocean ridge corner flow |
| 作者: | Gebhardt D.J.; Butler S.L.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9066
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| EISSN: | 1944-8797
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| 出版年: | 2016
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| 卷: | 43, 期:8 | | 起始页码: | 3700
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| 结束页码: | 3707
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| 语种: | 英语
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| 英文关键词: | compaction
; mid-ocean ridge
; partial melt
; porosity
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| Scopus关键词: | Compaction
; Matrix algebra
; Porosity
; Shear flow
; Structural geology
; Submarine geology
; Viscosity
; Interstitial liquid
; Linear instability analysis
; Lithosphere-asthenosphere boundary
; Matrix viscosity
; Mid-ocean ridges
; Partial melt
; Rate independents
; Strain-rate-dependent
; Strain rate
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| 英文摘要: | Imposing external shear on systems of partial melt can cause compaction of the solid matrix and concentration of the interstitial liquid melt thereby generating bands of contrasting high and low porosity. These shear-induced porosity bands have been proposed to channel melt beneath a mid-ocean ridge (MOR). In this contribution, we impose a shear flow that evolves as the bands are transported along streamlines of MOR corner flow. We evaluate the suitability of porosity band formation as a mechanism for melt channeling beneath a MOR using a linear instability analysis with three different matrix viscosity conditions: isotropic strain rate independent, isotropic strain rate dependent, and anisotropic. Our analysis shows that the largest amplitude bands channel melt away from the ridge axis toward the base of the plate at the lithosphere-asthenosphere boundary, while the effectiveness of channeling through the bands is highly dependent on the mantle bulk viscosity. ©2016. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84968865996&doi=10.1002%2f2016GL068688&partnerID=40&md5=409aff48b4697ccd8a08c6e922b42f12
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/10029
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| 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 Geological Sciences, University of Saskatchewan, Saskatoon, SK, Canada
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| Recommended Citation: | |
Gebhardt D.J.,Butler S.L.. Linear analysis of melt band formation in a mid-ocean ridge corner flow[J]. Geophysical Research Letters,2016-01-01,43(8).
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