| DOI: | 10.1002/2014GL061570
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| 论文题名: | Dike-induced contraction along oceanic and continental divergent plate boundaries |
| 作者: | Trippanera D.; Acocella V.; Ruch J.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9680
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| EISSN: | 1944-9411
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| 出版年: | 2014
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| 卷: | 41, 期:20 | | 起始页码: | 7098
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| 结束页码: | 7104
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| 语种: | 英语
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| 英文关键词: | dike
; divergent plate boundary
; extension
; reverse fault
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| Scopus关键词: | Fracture
; Hydraulic structures
; Levees
; Plates (structural components)
; Dike emplacements
; Direct product
; Evolutionary stage
; extension
; Magma emplacement
; Main Ethiopian Rift
; Plate boundaries
; Reverse faults
; Faulting
; continental margin
; dike
; emplacement
; fault
; magma
; plate boundary
; plate tectonics
; reverse fault
; rift zone
; Iceland
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| 英文摘要: | The axis of divergent plate boundaries shows extension fractures and normal faults at the surface. Here we present evidence of contraction along the axis of the oceanic ridge of Iceland and the continental Main Ethiopian Rift. Contraction is found at the base of the tilted hanging wall of dilational normal faults, balancing part of their extension. Our experiments suggest that these structures result from dike emplacement. Multiple dike injection induces subsidence above and uplift to the sides of the dikes; the transition in between is accommodated by reverse faults and subsequent peripheral inward dipping normal faults. Our results suggest that contraction is a direct product of magma emplacement along divergent plate boundaries, at various scales, marking a precise evolutionary stage and initiating part of the extensional structures (extension fractures and normal faults). Key Points Contraction along divergent plate boundaries results from dike emplacementContraction generates extensional structures along divergent plate boundariesSurface deformation along divergent plate boundaries may be magma induced ©2014. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84911373517&doi=10.1002%2f2014GL061570&partnerID=40&md5=776259f256cef9241109dcf9f368ccb4
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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/6944
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| Appears in Collections: | 气候减缓与适应
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作者单位: | Dipartimento di Scienze, Università Roma Tre, Rome, Italy
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| Recommended Citation: | |
Trippanera D.,Acocella V.,Ruch J.. Dike-induced contraction along oceanic and continental divergent plate boundaries[J]. Geophysical Research Letters,2014-01-01,41(20).
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