Stretching–buoyancy interplay in the magma-poor rifting process

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27350%2F23%3A10256245" target="_blank" >RIV/61989100:27350/23:10256245 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.scopus.com/record/display.uri?eid=2-s2.0-85186179251&origin=resultslist&sort=plf-f&src=s&sid=be5e5d79afab5f567fe4157cf24fd8b8&sot=b&sdt=cl&cluster=scosubjabbr%2C%22EART%22%2Ct&s=AUTH%28Nem%C4%8Dok%2C+M.%29&sl=16&sessionSearchId=be5e5d79afab5f567fe4157cf24fd8b8&relpos=7" target="_blank" >https://www.scopus.com/record/display.uri?eid=2-s2.0-85186179251&origin=resultslist&sort=plf-f&src=s&sid=be5e5d79afab5f567fe4157cf24fd8b8&sot=b&sdt=cl&cluster=scosubjabbr%2C%22EART%22%2Ct&s=AUTH%28Nem%C4%8Dok%2C+M.%29&sl=16&sessionSearchId=be5e5d79afab5f567fe4157cf24fd8b8&relpos=7</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1144/SP524-2021-162" target="_blank" >10.1144/SP524-2021-162</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Stretching–buoyancy interplay in the magma-poor rifting process

Popis výsledku v původním jazyce

The Cauvery Basin in East India represents a failed rift zone in the west and transform-related termination in the east. The deformation associated with a westward-propagating rift zone involves stretching and necking-related deformation from west to east. The rift axis and the flanks exhibit maximum and minimum deformation. In this study, we document the increasing role of buoyancy-driven processes and the development of the rift asymmetry during the advanced stages of rifting in a magma-poor setting. We use a series of reflection seismic profiles intersecting the failed rift zone maturing eastward. The onset of buoyancy-controlled extension correlates with the localized extension. It creates a relatively symmetrical axial dome, and exhibits rift flank rotations and central up-warping. This permanent uplift is associated with lower crustal ductile flow. Notably, the deep-seated syn-rift buoyancy forces progressively operate eastward. We deduce the associated transient dome uplift and its subsequent dissipation using a seismic flattening technique. The axial dome formation is associated with an upwelling asthenosphere and lower lithospheric mantle. This correlates with localized contraction within flat-lying fault blocks at its flanks, concurrently forming the typical hanging-wall and footwall geometry. The multiple shallow-to deep-seated mechanisms promote strain acceleration in the uplifted regions along the rift zone. © 2022 The Author(s). Published by The Geological Society of London. All rights reserved.

Název v anglickém jazyce

Stretching–buoyancy interplay in the magma-poor rifting process

Popis výsledku anglicky

The Cauvery Basin in East India represents a failed rift zone in the west and transform-related termination in the east. The deformation associated with a westward-propagating rift zone involves stretching and necking-related deformation from west to east. The rift axis and the flanks exhibit maximum and minimum deformation. In this study, we document the increasing role of buoyancy-driven processes and the development of the rift asymmetry during the advanced stages of rifting in a magma-poor setting. We use a series of reflection seismic profiles intersecting the failed rift zone maturing eastward. The onset of buoyancy-controlled extension correlates with the localized extension. It creates a relatively symmetrical axial dome, and exhibits rift flank rotations and central up-warping. This permanent uplift is associated with lower crustal ductile flow. Notably, the deep-seated syn-rift buoyancy forces progressively operate eastward. We deduce the associated transient dome uplift and its subsequent dissipation using a seismic flattening technique. The axial dome formation is associated with an upwelling asthenosphere and lower lithospheric mantle. This correlates with localized contraction within flat-lying fault blocks at its flanks, concurrently forming the typical hanging-wall and footwall geometry. The multiple shallow-to deep-seated mechanisms promote strain acceleration in the uplifted regions along the rift zone. © 2022 The Author(s). Published by The Geological Society of London. All rights reserved.

Druh

J_SC - Článek v periodiku v databázi SCOPUS

CEP obor

—

OECD FORD obor

10505 - Geology

Projekt

—

Návaznosti

V - Vyzkumna aktivita podporovana z jinych verejnych zdroju

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

Geological Society Special Publication. Volume 524

ISSN

0305-8719

e-ISSN

—

Svazek periodika

524

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

27

Strana od-do

93-119

Kód UT WoS článku

—

EID výsledku v databázi Scopus

2-s2.0-85186179251