How many subductions in the Variscan orogeny? Insights from numerical models

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025798%3A_____%2F20%3A00000191" target="_blank" >RIV/00025798:_____/20:00000191 - isvavai.cz</a>

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S1674987119302002#" target="_blank" >https://www.sciencedirect.com/science/article/pii/S1674987119302002#</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.gsf.2019.10.005" target="_blank" >10.1016/j.gsf.2019.10.005</a>

Result language

angličtina

Original language name

How many subductions in the Variscan orogeny? Insights from numerical models

Original language description

We developed a 2D numerical model to simulate the evolution of two superposed ocean-continent-ocean subduction cycles with opposite vergence, both followed by continental collision, aiming to better understand the evolution of the Variscan belt. Three models with different velocities of the first oceanic subduction have been implemented. Striking differences in the thermo-mechanical evolution between the first subduction, which activates in an unperturbed system, and the second subduction, characterised by an opposite vergence, have been enlighten, in particular regarding the temperature in the mantle wedge and in the interior of the slab. Pressure and temperature (P-T) conditions predicted by one cycle and two cycles models have been compared with natural P-T estimates of the Variscan metamorphism from the Alps and from the French Massif Central (FMC). The comparative analysis supports that a slow and hot subduction well reproduces the P-T conditions compatible with data from the FMC, while P-T conditions compatible with data of Variscan metamorphism from the Alps can be reproduced by either a cold or hot oceanic subduction models. Analysing the agreement of both double and single subduction models with natural P-T estimates, we observed that polycyclic models better describe the evolution of the Variscan orogeny.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10505 - Geology

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2020

Confidentiality

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

Name of the periodical

Geoscience Frontiers

ISSN

1674-9871

e-ISSN

—

Volume of the periodical

11

Issue of the periodical within the volume

3

Country of publishing house

CN - CHINA

Number of pages

28

Pages from-to

1025-1052

UT code for WoS article

000530750200021

EID of the result in the Scopus database

2-s2.0-85077390301