Along-strike magma-poor/magma-rich spreading transitions

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27350%2F23%3A10256249" target="_blank" >RIV/61989100:27350/23:10256249 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.scopus.com/record/display.uri?eid=2-s2.0-85186258679&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=2" target="_blank" >https://www.scopus.com/record/display.uri?eid=2-s2.0-85186258679&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=2</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1144/SP524-2022-183" target="_blank" >10.1144/SP524-2022-183</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Along-strike magma-poor/magma-rich spreading transitions

Popis výsledku v původním jazyce

1D/2D data-based studies of active spreading centres brought the knowledge of extension rate-dependent stretching-dominated v. buoyancy-dominated spreading. 3D reflection seismic data from the extinct centre of an initial oceanic corridor in the Caribbean allow us to see an along-strike transition between stretching-and buoyancy-dominated spreading where the spreading through detachment faulting is a precursor to the magma-assisted spreading. Studying progressively more evolved portions of the spreading centre, going from its end towards its centre, we see a progressively higher ascent of the asthenosphere, which heats the developing core complex in the exhuming footwall of the initial stretching-dominated system. The asthenospheric ascent is associated with thermal weakening of the core complex, which eventually results in ductile deformation reaching the upper portion of the complex. Subsequently, the core complex is penetrated by the dyke located at the top of the asthenospheric body. The dyke, which subsequently evolves to a diapir-shaped body, reaches the sea floor and establishes a magma-assisted steady-state seafloor spreading. These observations lead to a model explaining the initiation of the magma-assisted spreading in the initial oceanic corridor. Furthermore, they also improve our knowledge of multiple interacting mechanisms involved in the breakup of the last continental lithospheric layer, subsequent disorganized spreading and younger organized spreading. (C) 2023 The Author(s). Published by The Geological Society of London. All rights reserved.

Název v anglickém jazyce

Along-strike magma-poor/magma-rich spreading transitions

Popis výsledku anglicky

1D/2D data-based studies of active spreading centres brought the knowledge of extension rate-dependent stretching-dominated v. buoyancy-dominated spreading. 3D reflection seismic data from the extinct centre of an initial oceanic corridor in the Caribbean allow us to see an along-strike transition between stretching-and buoyancy-dominated spreading where the spreading through detachment faulting is a precursor to the magma-assisted spreading. Studying progressively more evolved portions of the spreading centre, going from its end towards its centre, we see a progressively higher ascent of the asthenosphere, which heats the developing core complex in the exhuming footwall of the initial stretching-dominated system. The asthenospheric ascent is associated with thermal weakening of the core complex, which eventually results in ductile deformation reaching the upper portion of the complex. Subsequently, the core complex is penetrated by the dyke located at the top of the asthenospheric body. The dyke, which subsequently evolves to a diapir-shaped body, reaches the sea floor and establishes a magma-assisted steady-state seafloor spreading. These observations lead to a model explaining the initiation of the magma-assisted spreading in the initial oceanic corridor. Furthermore, they also improve our knowledge of multiple interacting mechanisms involved in the breakup of the last continental lithospheric layer, subsequent disorganized spreading and younger organized spreading. (C) 2023 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

18

Strana od-do

147-164

Kód UT WoS článku

—

EID výsledku v databázi Scopus

2-s2.0-85186258679