Slab buckling as a driver for rapid oscillations in Indian plate motion and subduction rate

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F24%3A10489470" target="_blank" >RIV/00216208:11320/24:10489470 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=RLjkex~lvv" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=RLjkex~lvv</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1038/s43247-024-01472-x" target="_blank" >10.1038/s43247-024-01472-x</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Slab buckling as a driver for rapid oscillations in Indian plate motion and subduction rate

Popis výsledku v původním jazyce

Plate tectonics is primarily driven by the constant gravitational pull of slabs where oceanic lithosphere sinks into the mantle at subduction zones. Under stable plate boundary configurations, changes in plate motion are then thought to occur gradually. Surprisingly, recent high-resolution Indian plate reconstructions revealed rapid (2-3 Million-year) plate velocity oscillations of +/- 50 %. We show, through numerical experiments, that the buckling of slabs in the mantle transition zone causes such oscillations. This buckling results from the deceleration of slabs as they sink into the lower mantle. The amplitude and period of buckling-associated oscillations depend on average subduction velocity and the available space in the mantle transition zone. The oscillations also affect the upper plate which may explain enigmatic observations of episodic deformation and fluid flow in subduction-related orogens. We infer that the slab pull that drives plate tectonics is generated in just the top few hundred kilometers of the mantle. Slab buckling in the mantle transition zone can explain 2-3 million-year oscillations in the Indian plate velocity during rapid subduction, based on two-dimensional numerical models.

Název v anglickém jazyce

Slab buckling as a driver for rapid oscillations in Indian plate motion and subduction rate

Popis výsledku anglicky

Plate tectonics is primarily driven by the constant gravitational pull of slabs where oceanic lithosphere sinks into the mantle at subduction zones. Under stable plate boundary configurations, changes in plate motion are then thought to occur gradually. Surprisingly, recent high-resolution Indian plate reconstructions revealed rapid (2-3 Million-year) plate velocity oscillations of +/- 50 %. We show, through numerical experiments, that the buckling of slabs in the mantle transition zone causes such oscillations. This buckling results from the deceleration of slabs as they sink into the lower mantle. The amplitude and period of buckling-associated oscillations depend on average subduction velocity and the available space in the mantle transition zone. The oscillations also affect the upper plate which may explain enigmatic observations of episodic deformation and fluid flow in subduction-related orogens. We infer that the slab pull that drives plate tectonics is generated in just the top few hundred kilometers of the mantle. Slab buckling in the mantle transition zone can explain 2-3 million-year oscillations in the Indian plate velocity during rapid subduction, based on two-dimensional numerical models.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10500 - Earth and related environmental sciences

Projekt

<a href="/cs/project/GA23-06345S" target="_blank" >GA23-06345S: Seismo-geodynamické modelování Helénské subdukce</a><br>

Návaznosti

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

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

Communications Earth &amp; Environment

ISSN

2662-4435

e-ISSN

2662-4435

Svazek periodika

5

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

11

Strana od-do

316

Kód UT WoS článku

001244885700001

EID výsledku v databázi Scopus

2-s2.0-85195890396