Evidence from Caustic Waveform Modeling for Long Slab Thickening above the 660?km Discontinuity under Northeast Asia: Dynamic Implications

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025798%3A_____%2F15%3A00000144" target="_blank" >RIV/00025798:_____/15:00000144 - isvavai.cz</a>

Výsledek na webu

<a href="http://eu.wiley.com/WileyCDA/WileyTitle/productCd-1118888855.html" target="_blank" >http://eu.wiley.com/WileyCDA/WileyTitle/productCd-1118888855.html</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/9781118888865.ch0" target="_blank" >10.1002/9781118888865.ch0</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Evidence from Caustic Waveform Modeling for Long Slab Thickening above the 660?km Discontinuity under Northeast Asia: Dynamic Implications

Popis výsledku v původním jazyce

Knowledge of thickness of the slab is of great importance in understanding the deformation of subducting lithosphere and the mantle rheology which are closely related to the ongoing geodynamic process. Seismic tomography technique has been used widely indetecting thermal-related mantle heterogeneities, however, poor resolution is obtained in constraints of slab image, especially in the mantle transition zone. In this study, we aimed to constrain the thickness of the slab in the MTZ beneath northeast Asia through a method of caustic waveform modeling for both P and S waves. We detect a high velocity layer associated with a thickened slab lying in the upper mantle transition zone (MTZ), and the refined thickness is estimated to be ~140 +-20 km. Our results suggest that the slab is 50-60 km thickened at the long-stagnant portion, indicating an ongoing piling up of slabs under Northeast Asia. We argue that the slab might be on the margin of an instable state. Based on our numerical simula

Název v anglickém jazyce

Evidence from Caustic Waveform Modeling for Long Slab Thickening above the 660?km Discontinuity under Northeast Asia: Dynamic Implications

Popis výsledku anglicky

Knowledge of thickness of the slab is of great importance in understanding the deformation of subducting lithosphere and the mantle rheology which are closely related to the ongoing geodynamic process. Seismic tomography technique has been used widely indetecting thermal-related mantle heterogeneities, however, poor resolution is obtained in constraints of slab image, especially in the mantle transition zone. In this study, we aimed to constrain the thickness of the slab in the MTZ beneath northeast Asia through a method of caustic waveform modeling for both P and S waves. We detect a high velocity layer associated with a thickened slab lying in the upper mantle transition zone (MTZ), and the refined thickness is estimated to be ~140 +-20 km. Our results suggest that the slab is 50-60 km thickened at the long-stagnant portion, indicating an ongoing piling up of slabs under Northeast Asia. We argue that the slab might be on the margin of an instable state. Based on our numerical simula

Druh

C - Kapitola v odborné knize

CEP obor

DB - Geologie a mineralogie

OECD FORD obor

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Projekt

<a href="/cs/project/LK11202" target="_blank" >LK11202: Role paleozoických akrečních a kolizních orogénů na tvorbu a růst kontinentální kůry</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2015

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název knihy nebo sborníku

Subduction Dynamics: From Mantle Flow to Mega Disasters

ISBN

9781118888858

Počet stran výsledku

14

Strana od-do

5-18

Počet stran knihy

210

Název nakladatele

American Geophysical Union

Místo vydání

Washington

Kód UT WoS kapitoly

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