Aseismic ridge subduction and flat subduction: Insights from three-dimensional numerical models

Flat subduction can significantly influence the distribution of volcanism, stress state, and surface topography of the overriding plate. However, the mechanisms for inducing flat subduction remain controversial. Previous two-dimensional (2-D) numerical models and laboratory analogue models suggested...
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Autor*in:	Hui Zhao [verfasserIn] Wei Leng [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2023

Schlagwörter:	flat subduction aseismic ridge oceanic plateau 3-d numerical simulation

Übergeordnetes Werk:	In: Earth and Planetary Physics - Science Press, 2022, 7(2023), 2, Seite 269-281
Übergeordnetes Werk:	volume:7 ; year:2023 ; number:2 ; pages:269-281

Links:	Link aufrufen Link aufrufen Link aufrufen Journal toc

DOI / URN:	10.26464/epp2023032

Katalog-ID:	DOAJ087893800

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spelling	10.26464/epp2023032 doi (DE-627)DOAJ087893800 (DE-599)DOAJb3993efb97ef43f18de15bc6be6373d1 DE-627 ger DE-627 rakwb eng QC801-809 GE1-350 Hui Zhao verfasserin aut Aseismic ridge subduction and flat subduction: Insights from three-dimensional numerical models 2023 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Flat subduction can significantly influence the distribution of volcanism, stress state, and surface topography of the overriding plate. However, the mechanisms for inducing flat subduction remain controversial. Previous two-dimensional (2-D) numerical models and laboratory analogue models suggested that a buoyant impactor (aseismic ridge, oceanic plateau, or the like) may induce flat subduction. However, three-dimensional (3-D) systematic studies on the relationship between flat subduction and buoyant blocks are still lacking. Here, we use a 3-D numerical model to investigate the influence of the aseismic ridge, especially its width (which is difficult to consider in 2-D numerical models), on the formation of flat subduction. Our model results suggest that the aseismic ridge needs to be wide and thick enough to induce flat subduction, a condition that is difficult to satisfy on the Earth. We also find that the subduction of an aseismic ridge parallel to the trench or a double aseismic ridge normal to the trench has a similar effect on super-wide aseismic ridge subduction in terms of causing flat subduction, which can explain the flat subduction observed beneath regions such as Chile and Peru. flat subduction aseismic ridge oceanic plateau 3-d numerical simulation Science Q Geophysics. Cosmic physics Environmental sciences Wei Leng verfasserin aut In Earth and Planetary Physics Science Press, 2022 7(2023), 2, Seite 269-281 (DE-627)1017742499 20963955 nnns volume:7 year:2023 number:2 pages:269-281 https://doi.org/10.26464/epp2023032 kostenfrei https://doaj.org/article/b3993efb97ef43f18de15bc6be6373d1 kostenfrei http://www.eppcgs.org/article/doi/10.26464/epp2023032?pageType=en kostenfrei https://doaj.org/toc/2096-3955 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_120 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_266 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2001 GBV_ILN_2014 GBV_ILN_2015 GBV_ILN_2031 GBV_ILN_2037 GBV_ILN_2039 GBV_ILN_2059 GBV_ILN_2064 GBV_ILN_2106 GBV_ILN_2108 GBV_ILN_2111 GBV_ILN_2112 GBV_ILN_2113 GBV_ILN_2118 GBV_ILN_2122 GBV_ILN_2143 GBV_ILN_2147 GBV_ILN_2148 GBV_ILN_2152 GBV_ILN_2153 GBV_ILN_2232 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 7 2023 2 269-281
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author	Hui Zhao
spellingShingle	Hui Zhao misc QC801-809 misc GE1-350 misc flat subduction misc aseismic ridge misc oceanic plateau misc 3-d numerical simulation misc Science misc Q misc Geophysics. Cosmic physics misc Environmental sciences Aseismic ridge subduction and flat subduction: Insights from three-dimensional numerical models
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title	Aseismic ridge subduction and flat subduction: Insights from three-dimensional numerical models
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title_full	Aseismic ridge subduction and flat subduction: Insights from three-dimensional numerical models
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title_sort	aseismic ridge subduction and flat subduction: insights from three-dimensional numerical models
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title_auth	Aseismic ridge subduction and flat subduction: Insights from three-dimensional numerical models
abstract	Flat subduction can significantly influence the distribution of volcanism, stress state, and surface topography of the overriding plate. However, the mechanisms for inducing flat subduction remain controversial. Previous two-dimensional (2-D) numerical models and laboratory analogue models suggested that a buoyant impactor (aseismic ridge, oceanic plateau, or the like) may induce flat subduction. However, three-dimensional (3-D) systematic studies on the relationship between flat subduction and buoyant blocks are still lacking. Here, we use a 3-D numerical model to investigate the influence of the aseismic ridge, especially its width (which is difficult to consider in 2-D numerical models), on the formation of flat subduction. Our model results suggest that the aseismic ridge needs to be wide and thick enough to induce flat subduction, a condition that is difficult to satisfy on the Earth. We also find that the subduction of an aseismic ridge parallel to the trench or a double aseismic ridge normal to the trench has a similar effect on super-wide aseismic ridge subduction in terms of causing flat subduction, which can explain the flat subduction observed beneath regions such as Chile and Peru.
abstractGer	Flat subduction can significantly influence the distribution of volcanism, stress state, and surface topography of the overriding plate. However, the mechanisms for inducing flat subduction remain controversial. Previous two-dimensional (2-D) numerical models and laboratory analogue models suggested that a buoyant impactor (aseismic ridge, oceanic plateau, or the like) may induce flat subduction. However, three-dimensional (3-D) systematic studies on the relationship between flat subduction and buoyant blocks are still lacking. Here, we use a 3-D numerical model to investigate the influence of the aseismic ridge, especially its width (which is difficult to consider in 2-D numerical models), on the formation of flat subduction. Our model results suggest that the aseismic ridge needs to be wide and thick enough to induce flat subduction, a condition that is difficult to satisfy on the Earth. We also find that the subduction of an aseismic ridge parallel to the trench or a double aseismic ridge normal to the trench has a similar effect on super-wide aseismic ridge subduction in terms of causing flat subduction, which can explain the flat subduction observed beneath regions such as Chile and Peru.
abstract_unstemmed	Flat subduction can significantly influence the distribution of volcanism, stress state, and surface topography of the overriding plate. However, the mechanisms for inducing flat subduction remain controversial. Previous two-dimensional (2-D) numerical models and laboratory analogue models suggested that a buoyant impactor (aseismic ridge, oceanic plateau, or the like) may induce flat subduction. However, three-dimensional (3-D) systematic studies on the relationship between flat subduction and buoyant blocks are still lacking. Here, we use a 3-D numerical model to investigate the influence of the aseismic ridge, especially its width (which is difficult to consider in 2-D numerical models), on the formation of flat subduction. Our model results suggest that the aseismic ridge needs to be wide and thick enough to induce flat subduction, a condition that is difficult to satisfy on the Earth. We also find that the subduction of an aseismic ridge parallel to the trench or a double aseismic ridge normal to the trench has a similar effect on super-wide aseismic ridge subduction in terms of causing flat subduction, which can explain the flat subduction observed beneath regions such as Chile and Peru.
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title_short	Aseismic ridge subduction and flat subduction: Insights from three-dimensional numerical models
url	https://doi.org/10.26464/epp2023032 https://doaj.org/article/b3993efb97ef43f18de15bc6be6373d1 http://www.eppcgs.org/article/doi/10.26464/epp2023032?pageType=en https://doaj.org/toc/2096-3955
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However, the mechanisms for inducing flat subduction remain controversial. Previous two-dimensional (2-D) numerical models and laboratory analogue models suggested that a buoyant impactor (aseismic ridge, oceanic plateau, or the like) may induce flat subduction. However, three-dimensional (3-D) systematic studies on the relationship between flat subduction and buoyant blocks are still lacking. Here, we use a 3-D numerical model to investigate the influence of the aseismic ridge, especially its width (which is difficult to consider in 2-D numerical models), on the formation of flat subduction. Our model results suggest that the aseismic ridge needs to be wide and thick enough to induce flat subduction, a condition that is difficult to satisfy on the Earth. 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Aseismic ridge subduction and flat subduction: Insights from three-dimensional numerical models

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