GSTDTAP  > 地球科学
DOI10.1038/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
ISSN0028-0836
EISSN1476-4687
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
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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
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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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