Taras V. Gerya
ETH Zurich
Publications 485
#1Marzieh BaesH-Index: 4
#2Stephan V. Sobolev (University of Potsdam)H-Index: 6
Last.Sascha Brune (University of Potsdam)H-Index: 16
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#1Simon PreussH-Index: 1
#2Jean-Paul AmpueroH-Index: 38
Last.Ylona van DintherH-Index: 5
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#1Armel Menant (IPGP: Institut de Physique du Globe de Paris)H-Index: 10
#2Samuel Angiboust (IPGP: Institut de Physique du Globe de Paris)H-Index: 16
Last.Taras V. Gerya (EPFL: École Polytechnique Fédérale de Lausanne)H-Index: 59
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The heterogeneity of frictional strength along the megathrust earthquake zone critically controls plate coupling and long-term subduction dynamics. However, the persistence and distribution of high-friction segments through space and time remain poorly constrained. Here, we show that accretion processes, such as tectonic underplating (i.e., basal accretion of material below the fore-arc region), can be used as a proxy to characterize the long-term frictional zonation of the subduction interface....
#1Luca Dal Zilio (ETH Zurich)H-Index: 4
#2Ylona van Dinther (ETH Zurich)H-Index: 5
Last.Jean-Philippe Avouac (California Institute of Technology)H-Index: 75
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There is increasing evidence that the Himalayan seismicity can be bimodal: blind earthquakes (up to Mw ~ 7.8) tend to cluster in the downdip part of the seismogenic zone, whereas infrequent great earthquakes (Mw 8+) propagate up to the Himalayan frontal thrust. To explore the causes of this bimodal seismicity, we developed a two-dimensional, seismic cycle model of the Nepal Himalaya. Our visco-elasto-plastic simulations reproduce important features of the earthquake cycle, including interseismic...
8 CitationsSource
#1Elena SizovaH-Index: 2
Last.Taras V. GeryaH-Index: 59
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Some (ultra)high-pressure metamorphic rocks that formed during continental collision preserve relict minerals, indicating a two-stage evolution: first, subduction to mantle depths and exhumation to the lower-crustal level (with simultaneous cooling), followed by intensive heating that can be characterized by a β-shaped pressure–temperature–time (P–T–t) path. Based on a two-dimensional (2D) coupled petrological–thermomechanical tectono-magmatic numerical model, we propose a possible sequence of t...
1 CitationsSource
#1Taras V. Gerya (ETH Zurich)H-Index: 59
#1Charitra Jain (ETH Zurich)H-Index: 2
#2A. Rozel (ETH Zurich)H-Index: 7
Last.Taras V. Gerya (ETH Zurich)H-Index: 59
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Abstract The majority of continental crust formed during the hotter Archean was composed of Tonalite-Trondhjemite-Granodiorite (TTG) rocks. In contrast to the present-day loci of crust formation around subduction zones and intra-plate tectonic settings, TTGs are formed when hydrated basalt melts at garnet-amphibolite, granulite or eclogite facies conditions. Generating continental crust requires a two step differentiation process. Basaltic magma is extracted from the pyrolytic mantle, is hydrate...
1 CitationsSource
#1Ylona van Dinther (ETH Zurich)H-Index: 5
#2Lukas E. Preiswerk (ETH Zurich)H-Index: 1
Last.Taras V. Gerya (ETH Zurich)H-Index: 59
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The 1960 M9.5 Valdivia and 1964 M9.2 Alaska earthquakes caused a decimeters high secondary zone of uplift a few hundred kilometers landward of the trench. We analyze GPS data from the 2010 M8.8 Maule and 2011 M9.0 Tohoku-Oki earthquakes to reveal the persistent existence of a secondary zone of uplift due to great earthquakes at the megathrust interface. This uplift varies in magnitude and location, but consistently occurs at a few hundred kilometers landward from the trench and is likely mainly ...
1 CitationsSource
#1Zhong-Hai Li (CAS: Chinese Academy of Sciences)H-Index: 13
#2Taras V. Gerya (ETH Zurich)H-Index: 59
Last.James A. D. Connolly (ETH Zurich)H-Index: 53
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Abstract Variable morphologies of subducting slabs are observed in tomographic images of the mantle transition zone (MTZ), where slabs appear to stagnate in the MTZ or enter the lower mantle. These contrasting morphologies of subducting slabs are dependent on the joint effects of various dynamic, kinematic and geometric factors. Force balance analysis indicates that the favorable conditions of slab stagnation in the MTZ include old/cold slab subducting into the mantle with large Clapeyron slopes...
1 CitationsSource
#1Simon Preuss (ETH Zurich)H-Index: 1
#2Robert Herrendörfer (ETH Zurich)H-Index: 3
Last.Ylona van Dinther (ETH Zurich)H-Index: 5
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Orientations of natural fault systems are subject to large variations. They often contradict classical Coulomb failure theory as they are misoriented relative to the regional Andersonian stress field. This is ascribed to local effects of structural or stress heterogeneities and reorientations of structures or stresses on the long term. To better understand the relation between fault orientation and regional stresses, we simulate spontaneous fault growth and its effect on the stress field. Our ap...
4 CitationsSource