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DOI | 10.1038/nature21377 |
Earthquake-induced transformation of the lower crust | |
Jamtveit, Bjorn1; Ben-Zion, Yehuda2; Renard, Francois1,3; Austrheim, Hakon1 | |
2018-04-26 | |
发表期刊 | NATURE
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ISSN | 0028-0836 |
EISSN | 1476-4687 |
出版年 | 2018 |
卷号 | 556期号:7702页码:487-+ |
文章类型 | Article |
语种 | 英语 |
国家 | Norway; USA; France |
英文摘要 | The structural and metamorphic evolution of the lower crust has direct effects on the lithospheric response to plate tectonic processes involved in orogeny, including subsidence of sedimentary basins, stability of deep mountain roots and extension of high-topography regions. Recent research shows that before orogeny most of the lower crust is dry, impermeable and mechanically strong(1). During an orogenic event, the evolution of the lower crust is controlled by infiltration of fluids along localized shear or fracture zones. In the Bergen Arcs of Western Norway, shear zones initiate as faults generated by lower-crustal earthquakes. Seismic slip in the dry lower crust requires stresses at a level that can only be sustained over short timescales or local weakening mechanisms. However, normal earthquake activity in the seismogenic zone produces stress pulses that drive aftershocks in the lower crust(2). Here we show that the volume of lower crust affected by such aftershocks is substantial and that fluid-driven associated metamorphic and structural transformations of the lower crust follow these earthquakes. This provides a 'top-down' effect on crustal geodynamics and connects processes operating at very different timescales. |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000430793000044 |
WOS关键词 | CONTINENTAL-CRUST ; NORWAY ; PSEUDOTACHYLYTE ; CONSTRAINTS ; MAGNITUDE ; FLUID ; FAULT ; INTERMEDIATE ; LITHOSPHERE ; EVOLUTION |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
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/202714 |
专题 | 地球科学 资源环境科学 气候变化 |
作者单位 | 1.Univ Oslo, Dept Geosci, Njord Ctr, PGP, Oslo, Norway; 2.Univ Southern Calif, Dept Earth Sci, Los Angeles, CA USA; 3.Univ Grenoble Alpes, Univ Savoie Mont Blanc, CNRS, IRD,IFSTTAR,ISTerre, Grenoble, France |
推荐引用方式 GB/T 7714 | Jamtveit, Bjorn,Ben-Zion, Yehuda,Renard, Francois,et al. Earthquake-induced transformation of the lower crust[J]. NATURE,2018,556(7702):487-+. |
APA | Jamtveit, Bjorn,Ben-Zion, Yehuda,Renard, Francois,&Austrheim, Hakon.(2018).Earthquake-induced transformation of the lower crust.NATURE,556(7702),487-+. |
MLA | Jamtveit, Bjorn,et al."Earthquake-induced transformation of the lower crust".NATURE 556.7702(2018):487-+. |
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