What controls structural variations along the Zagros Collision Zone? Insights from geophysical observations and thermo-mechanical modelling

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025798%3A_____%2F24%3A10169093" target="_blank" >RIV/00025798:_____/24:10169093 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1016/j.gr.2024.06.009" target="_blank" >https://doi.org/10.1016/j.gr.2024.06.009</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.gr.2024.06.009" target="_blank" >10.1016/j.gr.2024.06.009</a>

Result language

angličtina

Original language name

What controls structural variations along the Zagros Collision Zone? Insights from geophysical observations and thermo-mechanical modelling

Original language description

The Zagros Collision Zone is a complex tectonic region formed as a consequence of the collision between Arabia and Eurasia after the subduction of the Neo-Tethys ocean. The NW -SE striking Zagros orogen consists of the following parallel tectonic units (from SW to NE): Zagros Fold and Thrust Belt (ZFTB), Sanandaj-Sirjan Metamorphic Zone (SSZ), and Urumieh-Dokhtar Magmatic Arc (UDMA). In this study, we perform a combined analysis of recent geophysical data, revealing pronounced differences in the crustal and lithospheric structure along the Zagros Mountains. The northwestern sector shows a fairly uniform crustal thickening across the broad symmetric orogen from the ZFTB to the UDMA. In contrast, in the central Zagros, the transition from a relatively narrow zone of high elevations and high -frequency relief in the ZFTB to a smoother surface topography of the SSZ and UDMA occurs with an abrupt increase in Moho depth below the SSZ. The last observation has recently been interpreted as a result of &quot;relamination&quot; process, where the felsic upper crust of the Arabian plate underthrust the mafic crust of the Iranian plate. We present geodynamic numerical models of crustal relamination during continental collision and compute static gravity field of the resulting structures. We show that oblique closure of the Neo-Tethys affects lateral variations in the style and extent of crustal relamination, which control the observed along -strike changes in crustal configuration and orogen altitude. In particular, a narrow and higher orogen (as in the central Zagros) develops in the experiments with a young and wide oceanic plate, whereas an old and narrow subducting plate tends to form a broad and lower topography (as in the northwestern Zagros). This is geometrically consistent with the progressive closure of the Neo-Tethys from NW to SE during the oblique continental collision between Arabia and Eurasia. (c) 2024 International Association for Gondwana Research. Published by Elsevier B.V. All rights are reserved, including those for text and data mining, AI training, and similar technologies.

Czech name

—

Czech description

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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

<a href="/en/project/GA23-08249S" target="_blank" >GA23-08249S: Origin of the relaminant in the Bohemian Massif during the Variscan orogeny</a><br>

Continuities

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

Publication year

2024

Confidentiality

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

Name of the periodical

Gondwana research

ISSN

1342-937X

e-ISSN

1878-0571

Volume of the periodical

133

Issue of the periodical within the volume

Září 2024

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

26

Pages from-to

297-322

UT code for WoS article

001261850300001

EID of the result in the Scopus database

2-s2.0-85196964215