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DOI | 10.1038/s41561-018-0229-y |
Deep embrittlement and complete rupture of the lithosphere during the M-w 8.2 Tehuantepec earthquake | |
Melgar, Diego1; Ruiz-Angulo, Angel2; Garcia, Emmanuel Soliman3; Manea, Marina4,5; Manea, Vlad. C.4,5; Xu, Xiaohua6; Ramirez-Herrera, M. Teresa7; Zavala-Hidalgo, Jorge8; Geng, Jianghui9; Corona, Nestor10; Perez-Campos, Xyoli11; Cabral-Cano, Enrique11; Ramirez-Guzman, Leonardo12 | |
2018-12-01 | |
发表期刊 | NATURE GEOSCIENCE
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ISSN | 1752-0894 |
EISSN | 1752-0908 |
出版年 | 2018 |
卷号 | 11期号:12页码:955-+ |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Mexico; Japan; Romania; Peoples R China |
英文摘要 | Subduction zones, where two tectonic plates converge, are generally dominated by large thrust earthquakes. Nonetheless, normal faulting from extensional stresses can occur as well. Rare large events of this kind in the instrumental record have typically nucleated in and ruptured the top half of old and cold lithosphere that is in a state of extension driven by flexure from plate bending. Such earthquakes are limited to regions of the subducting slab cooler than 650 degrees C and can be highly tsunamigenic, producing tsunamis similar in amplitude to those observed during large megathrust events. Here, we show from analyses of regional geophysical observations that normal faulting during the moment magnitude M(w)8.2 Tehuantepec earthquake ruptured the entire Cocos slab beneath the megathrust region. We find that the faulting reactivated a bend-fault fabric and ruptured to a depth well below the predicted brittle-ductile transition for the Cocos slab, including regions where temperature is expected to exceed 1,000 degrees C. Our findings suggest that young oceanic lithosphere is brittle to greater depths than previously assumed and that rupture is facilitated by wholesale deviatoric tension in the subducted slab, possibly due to fluid infiltration. We conclude that lithosphere can sustain brittle behaviour and fail in an earthquake at greater temperatures and ages than previously considered. |
领域 | 地球科学 ; 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000451837900017 |
WOS关键词 | INTRAPLATE EARTHQUAKE ; MEXICO ; SLAB ; DEHYDRATION ; SEISMICITY ; INVERSION ; OAXACA ; ARC |
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/34712 |
专题 | 地球科学 气候变化 |
作者单位 | 1.Univ Oregon, Dept Earth Sci, Eugene, OR 97403 USA; 2.Univ Nacl Autonoma Mexico, Ctr Ciencias Atmosfera, Mexico City, DF, Mexico; 3.Kyoto Univ, Disaster Prevent Res Inst, Kyoto, Japan; 4.Univ Nacl Autonoma Mexico, Ctr Geociencias, Computat Geodynam Lab, Campus Juriquilla, Queretaro, Mexico; 5.Astron Inst Romanian Acad, Bucharest, Romania; 6.Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093 USA; 7.Univ Nacl Autonoma Mexico, Inst Geog, Mexico City, DF, Mexico; 8.Univ Nacl Autonoma Mexico, Serv Mareog Nacl, Mexico City, DF, Mexico; 9.Wuhan Univ, GNSS Ctr, Wuhan, Hubei, Peoples R China; 10.Ctr Estud Geog Humana, Colegio Michoacan, La Piedad, Mexico; 11.Univ Nacl Autonoma Mexico, Inst Geofis, Mexico City, DF, Mexico; 12.Univ Nacl Autonoma Mexico, Inst Ingn, Mexico City, DF, Mexico |
推荐引用方式 GB/T 7714 | Melgar, Diego,Ruiz-Angulo, Angel,Garcia, Emmanuel Soliman,et al. Deep embrittlement and complete rupture of the lithosphere during the M-w 8.2 Tehuantepec earthquake[J]. NATURE GEOSCIENCE,2018,11(12):955-+. |
APA | Melgar, Diego.,Ruiz-Angulo, Angel.,Garcia, Emmanuel Soliman.,Manea, Marina.,Manea, Vlad. C..,...&Ramirez-Guzman, Leonardo.(2018).Deep embrittlement and complete rupture of the lithosphere during the M-w 8.2 Tehuantepec earthquake.NATURE GEOSCIENCE,11(12),955-+. |
MLA | Melgar, Diego,et al."Deep embrittlement and complete rupture of the lithosphere during the M-w 8.2 Tehuantepec earthquake".NATURE GEOSCIENCE 11.12(2018):955-+. |
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