Results 261 to 270 of about 15,041 (300)

Subduction Initiation in the Aleutian Arc System

, 2018
Bezard, Rachel, Hoernle, Kaj A., Hauff, Folkmar, Portnyagin, Maxim V., Werner, Reinhard, Yogodzinski, G., Jicha, B., Garbe-Schönberg, Dieter, Turner, S., Schaefer, B.   +9 more
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The ‘subduction initiation rule’: a key for linking ophiolites, intra-oceanic forearcs, and subduction initiation

Contributions to Mineralogy and Petrology, 2011
We establish the ‘subduction initiation rule’ (SIR) which predicts that most ophiolites form during subduction initiation (SI) and that the diagnostic magmatic chemostratigraphic progression for SIR ophiolites is from less to more HFSE-depleted and LILE-enriched compositions.
Scott A. Whattam, Robert J. Stern
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Do microcontinents nucleate subduction initiation?

Geology, 2023
Abstract Subduction initiation is a pivotal process in plate tectonics. Models of subduction initiation include the collapse of passive margins, oceanic transform faults, inversion of oceanic core complexes, and ridge failure but have ignored the potential effects of continental crust relicts within the oceanic crust.
Mingshuai Zhu, Zhiyong Yan, Daniel Pastor-Galán, Lin Chen, Laicheng Miao, Fuqin Zhang, Shun Li, Shunhu Yang   +7 more
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Plume-induced subduction initiation: single- or multi-slab subduction?

2020
<p>The formation of new subduction zones is a key component of global plate tectonics. Initiation of subduction following the impingement of a hot buoyant mantle plume is one of the few scenarios that allow breaking the lithosphere and recycling a stagnant lid without requiring any pre-existing weak zones.
Marzieh Baes, Stephan Sobolev, Taras Gerya, Sascha Brune   +3 more
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Plume-Induced subduction initiation

2021
Subduction initiation induced by a hot and buoyant mantle plume head is unique among proposed subduction initiation mechanisms because it does not require pre-existing weak zones or other forces for lithospheric collapse. Since recognition of the first evidence of subduction nucleation induced by a mantle plume in the Late Cretaceous Caribbean realm ...
Baes, Marzieh, Stern, Robert J., Whattam, Scott, Gerya, Taras V., Sobolev, Stephan V. (dr.)   +4 more
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On The initiation of subduction

Journal of Geophysical Research: Solid Earth, 1991
Estimates of shear resistance associated with lithospheric thrusting and convergence represent lower bounds on the force necessary to promote trench formation. Three environments proposed as preferential sites of incipient subduction are investigated: passive continental margins, transform faults/fracture zones, and extinct ridges.
Steve Mueller, Roger J. Phillips
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Subduction initiation at passive margins

2010
Subduction is a key process for terrestrial plate tectonics, but its initiation is still not entirely understood. In particular, despite the abundance of both passive and active continental margins on Earth, no obvious cases of transition between them have been identified so far.
Nikolaeva, K., Gerya, Taras, Marques, F. O.   +2 more
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Subduction initiation: spontaneous and induced

Earth and Planetary Science Letters, 2004
Abstract The sinking of lithosphere at subduction zones couples Earth's exterior with its interior, spawns continental crust and powers a tectonic regime that is unique to our planet. In spite of its importance, it is unclear how subduction is initiated.
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Subduction initiation and igneous petrogenesis

2018
<p>The impact of subduction initiation on regional to global tectonics and the compositions of major Earth reservoirs are topics of vigorous ongoing research. Here, pristine glasses extracted from ~51.9 Myr old basalts and younger boninites that erupted in the Izu-Bonin Mariana forearc immediately after subduction initiation were analyzed by ...
Daniel A. Coulthard, Mark Reagan, David W. Peate, Bradley Cramer   +3 more
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Subduction initiates at straight passive margins

Geology, 2014
Subduction initiation at straight passive margins can be investigated with two-dimensional (2-D) numerical models, because the geometry is purely cylindrical. However, on Earth, straight margins rarely occur. The construction of 3-D models is therefore critical in the modeling of spontaneous subduction initiation at realistic, curved passive margins ...
F.O. Marques, F.R. Cabral, T.V. Gerya, G. Zhu, D.A. May   +4 more
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