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DOI | 10.1038/s41561-017-0010-7 |
Fossil intermediate-depth earthquakes in subducting slabs linked to differential stress release | |
Scambelluri, Marco1; Pennacchioni, Giorgio2; Gilio, Mattia1,3; Bestmann, Michel4; Plumper, Oliver5; Nestola, Fabrizio2 | |
2017-12-01 | |
发表期刊 | NATURE GEOSCIENCE
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ISSN | 1752-0894 |
EISSN | 1752-0908 |
出版年 | 2017 |
卷号 | 10期号:12 |
文章类型 | Article |
语种 | 英语 |
国家 | Italy; Germany; Netherlands |
英文摘要 | The cause of intermediate-depth (50-300 km) seismicity in subduction zones is uncertain. It is typically attributed either to rock embrittlement associated with fluid pressurization, or to thermal runaway instabilities. Here we document glassy pseudotachylyte fault rocks-the products of frictional melting during coseismic faulting-in the Lanzo Massif ophiolite in the Italian Western Alps. These pseudotachylytes formed at subduction-zone depths of 60-70 km in poorly hydrated to dry oceanic gabbro and mantle peridotite. This rock suite is a fossil analogue to an oceanic lithospheric mantle that undergoes present-day subduction. The pseudotachylytes locally preserve high-pressure minerals that indicate an intermediate-depth seismic environment. These pseudotachylytes are important because they are hosted in a near-anhydrous lithosphere free of coeval ductile deformation, which excludes an origin by dehydration embrittlement or thermal runaway processes. Instead, our observations indicate that seismicity in cold subducting slabs can be explained by the release of differential stresses accumulated in strong dry metastable rocks. |
领域 | 地球科学 ; 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000416858000020 |
WOS关键词 | HIGH-PRESSURE METAMORPHISM ; DEEP-FOCUS EARTHQUAKES ; PORE FLUID PRESSURE ; LANZO PERIDOTITE ; SEISMIC EVIDENCE ; OCEANIC-CRUST ; WESTERN ALPS ; ULTRAMAFIC PSEUDOTACHYLYTES ; FACIES PSEUDOTACHYLYTES ; ZONE SEISMICITY |
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/34988 |
专题 | 地球科学 气候变化 |
作者单位 | 1.Univ Genoa, Dipartimento Sci Terra Ambiente & Vita, Genoa, Italy; 2.Univ Padua, Dipartimento Geosci, Padua, Italy; 3.Univ Pavia, Dipartimento Sci Terra & Ambiente, Pavia, Italy; 4.Friedrich Alexander Univ Erlangen Nurnberg, GeoZentrum Nordbayern, Erlangen, Germany; 5.Univ Utrecht, Dept Earth Sci, Utrecht, Netherlands |
推荐引用方式 GB/T 7714 | Scambelluri, Marco,Pennacchioni, Giorgio,Gilio, Mattia,et al. Fossil intermediate-depth earthquakes in subducting slabs linked to differential stress release[J]. NATURE GEOSCIENCE,2017,10(12). |
APA | Scambelluri, Marco,Pennacchioni, Giorgio,Gilio, Mattia,Bestmann, Michel,Plumper, Oliver,&Nestola, Fabrizio.(2017).Fossil intermediate-depth earthquakes in subducting slabs linked to differential stress release.NATURE GEOSCIENCE,10(12). |
MLA | Scambelluri, Marco,et al."Fossil intermediate-depth earthquakes in subducting slabs linked to differential stress release".NATURE GEOSCIENCE 10.12(2017). |
条目包含的文件 | 条目无相关文件。 |
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