Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017GL075389 |
Subduction Initiation With Vertical Lithospheric Heterogeneities and New Fault Formation | |
Mao, Xiaolin1; Gurnis, Michael1; May, Dave A.2 | |
2017-11-28 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2017 |
卷号 | 44期号:22 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; England |
英文摘要 | How subduction initiates with mechanically unfavorable lithospheric heterogeneities is important and rarely studied. We investigate this with a geodynamic model for the Puysegur Incipient Subduction Zone (PISZ) south of New Zealand. The model incorporates a true free surface, elasto-visco-plastic rheology and phase changes. Our predictions fit the morphology of the Puysegur Trench and Ridge and the deformation history on the overriding plate. We show how a new thrust fault forms and evolves into a smooth subduction interface, and how a preexisting weak zone can become a vertical fault inboard of the thrust fault during subduction initiation, consistent with two-fault system at PISZ. The model suggests that the PISZ may not yet be self-sustaining. We propose that the Snares Zone (or Snares Trough) is caused by plate coupling differences between shallower and deeper parts, the tectonic sliver between two faults experiences strong rotation, and low-density material accumulates beneath the Snares Zone. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000419102300015 |
WOS关键词 | NEW-ZEALAND ; INCIPIENT SUBDUCTION ; PUYSEGUR MARGIN ; PLATE ; ZONE ; TECTONICS ; VISCOSITY ; DYNAMICS ; SURFACE ; RIDGE |
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/26669 |
专题 | 气候变化 |
作者单位 | 1.CALTECH, Seismol Lab, Pasadena, CA 91125 USA; 2.Univ Oxford, Dept Earth Sci, Oxford, England |
推荐引用方式 GB/T 7714 | Mao, Xiaolin,Gurnis, Michael,May, Dave A.. Subduction Initiation With Vertical Lithospheric Heterogeneities and New Fault Formation[J]. GEOPHYSICAL RESEARCH LETTERS,2017,44(22). |
APA | Mao, Xiaolin,Gurnis, Michael,&May, Dave A..(2017).Subduction Initiation With Vertical Lithospheric Heterogeneities and New Fault Formation.GEOPHYSICAL RESEARCH LETTERS,44(22). |
MLA | Mao, Xiaolin,et al."Subduction Initiation With Vertical Lithospheric Heterogeneities and New Fault Formation".GEOPHYSICAL RESEARCH LETTERS 44.22(2017). |
条目包含的文件 | 条目无相关文件。 |
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