The role of pre-break-up heat flow on the thermal history of a transform margin

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F16%3A00111424" target="_blank" >RIV/00216224:14310/16:00111424 - isvavai.cz</a>

Výsledek na webu

<a href="https://sp.lyellcollection.org/content/specpubgsl/431/1/249.full.pdf" target="_blank" >https://sp.lyellcollection.org/content/specpubgsl/431/1/249.full.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1144/SP431.4" target="_blank" >10.1144/SP431.4</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The role of pre-break-up heat flow on the thermal history of a transform margin

Popis výsledku v původním jazyce

The paper focuses on the Romanche transform margin on the African side of the Equatorial Atlantic, and draws from thermomechanical numerical modelling and subsequent GIS-based thermal history grid processing. Our modelling indicates that the early post-break-up thermal history of the transform margin is controlled by the cooling patterns of the adjacent pull-apart terrains, the pre-rift heat-flow regime, laterally passing seafloor spreading centres, and cooling of the newly accreted oceanic crust in two corridors located in front of and behind the spreading centres. The pre-rift thermal regime controls the background heat flow on top of which the thermal transients develop. If it is cold, the transient anomalies are very distinct on this background. If it is warm, the transient anomalies tend to blend in with background heat flow much better. The most prominent anomalies are related to thinning in the pull-apart terrains located between transforms. They are up to three times wider than anomalies related to the laterally passing spreading centre, the anomaly of which becomes no wider than 20-25 km. Together with oceanic crust accreted in corridors in front of and behind the passing centre, its heat transfer into the transform margin tends to slow down the cooling of the syn-break-up anomalies developed in the pull-apart terrains by rifting.

Název v anglickém jazyce

The role of pre-break-up heat flow on the thermal history of a transform margin

Popis výsledku anglicky

The paper focuses on the Romanche transform margin on the African side of the Equatorial Atlantic, and draws from thermomechanical numerical modelling and subsequent GIS-based thermal history grid processing. Our modelling indicates that the early post-break-up thermal history of the transform margin is controlled by the cooling patterns of the adjacent pull-apart terrains, the pre-rift heat-flow regime, laterally passing seafloor spreading centres, and cooling of the newly accreted oceanic crust in two corridors located in front of and behind the spreading centres. The pre-rift thermal regime controls the background heat flow on top of which the thermal transients develop. If it is cold, the transient anomalies are very distinct on this background. If it is warm, the transient anomalies tend to blend in with background heat flow much better. The most prominent anomalies are related to thinning in the pull-apart terrains located between transforms. They are up to three times wider than anomalies related to the laterally passing spreading centre, the anomaly of which becomes no wider than 20-25 km. Together with oceanic crust accreted in corridors in front of and behind the passing centre, its heat transfer into the transform margin tends to slow down the cooling of the syn-break-up anomalies developed in the pull-apart terrains by rifting.

Druh

C - Kapitola v odborné knize

CEP obor

—

OECD FORD obor

10505 - Geology

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název knihy nebo sborníku

TRANSFORM MARGINS: DEVELOPMENT, CONTROLS AND PETROLEUM SYSTEMS

ISBN

9781862397446

Počet stran výsledku

23

Strana od-do

249-271

Počet stran knihy

385

Název nakladatele

Geological Society

Místo vydání

Bath

Kód UT WoS kapitoly

000388376400011