Crustal flow driving twin domes exhumation and low-angle normal faulting in the Menderes Massif of western Anatolia

Ömer Bodur; Oğuz Hakan Göğüş; Sascha Brune; Ebru Şengül Uluocak; Anne Glerum; Andreas Fichtner; Hasan Sözbilir

doi:10.1016/j.epsl.2023.118309

Crustal flow driving twin domes exhumation and low-angle normal faulting in the Menderes Massif of western Anatolia

Ömer Bodur^*, Oğuz Hakan Göğüş, Sascha Brune, Ebru Şengül Uluocak, Anne Glerum, Andreas Fichtner, Hasan Sözbilir

^*Bu çalışma için yazışmadan sorumlu yazar

Avrasya Yer Bilimleri Enstitüsü

Araştırma sonucu: ???type-name??? › Makale › bilirkişi

2 Atıf (Scopus)

Özet

Lower crustal flow in regions of post-orogenic extension has been inferred to explain the exhumation of metamorphic core complexes and associated low-angle normal (detachment) fault systems. However, the origin of detachment faults, whether initially formed as high-angle or low-angle shear zones, and the extension is symmetric or asymmetric remains enigmatic. Here, we use numerical modeling constrained by geophysical and geological data to show that symmetric extension in the central Menderes Massif of western Anatolia is accommodated by the crustal flow. Our geodynamic model explains how opposite dipping Gediz and Büyük Menderes detachment faults are formed by ∼40° footwall rotation. Model predictions agree with seismic tomography data that suggests updoming of lower crust beneath the exhumed massifs, represented as “twin domes” and a flat Moho. Our work helps to account for the genetic relation between the exhumation of metamorphic core complexes and low-angle normal faulting in both Cordillera and Aegean orogenic regions and has important implications on crustal dynamics in extensional provinces.

Orijinal dil	İngilizce
Makale numarası	118309
Dergi	Earth and Planetary Science Letters
Hacim	619
DOI'lar	https://doi.org/10.1016/j.epsl.2023.118309
Yayın durumu	Yayınlandı - 1 Eki 2023

Bibliyografik not

Publisher Copyright:
© 2023 Elsevier B.V.

Finansman

We thank the Computational Infrastructure for Geodynamics (geodynamics.org) which is funded by the National Science Foundation under award EAR-0949446 and EAR-1550901 for supporting the development of ASPECT. The numerical experiments presented here are available through contacting the authors. Meanwhile, documentation and the details for the numerical code can be found online (at https://aspect.geodynamics.org). OHG, AF and EŞU acknowledge Anatolian Tectonics Project-ANATEC (funded by International Lithosphere Program). The authors gratefully acknowledge the computing time granted by the Resource Allocation Board and provided on the supercomputer Lise at NHR@ZIB as part of the NHR infrastructure. The calculations for this research were conducted with computing resources under the project bbp00039. We are grateful to Paul Kapp and an anonymous reviewer for their constructive comments on the manuscript. OHG acknowledges Turkish Academy of Sciences (TUBA) for GEBIP support and TUBITAK for 2219 fellowship programme. ACG is funded by a Helmholtz Recruitment Initiative. We thank the Computational Infrastructure for Geodynamics (geodynamics.org) which is funded by the National Science Foundation under award EAR-0949446 and EAR-1550901 for supporting the development of ASPECT. The numerical experiments presented here are available through contacting the authors. Meanwhile, documentation and the details for the numerical code can be found online (at https://aspect.geodynamics.org ). OHG, AF and EŞU acknowledge Anatolian Tectonics Project-ANATEC (funded by International Lithosphere Program). The authors gratefully acknowledge the computing time granted by the Resource Allocation Board and provided on the supercomputer Lise at NHR@ZIB as part of the NHR infrastructure. The calculations for this research were conducted with computing resources under the project bbp00039. We are grateful to Paul Kapp and an anonymous reviewer for their constructive comments on the manuscript. OHG acknowledges Turkish Academy of Sciences (TUBA) for GEBIP support and TUBITAK for 2219 fellowship programme. ACG is funded by a Helmholtz Recruitment Initiative .

Finansörler	Finansör numarası
Anatolian Tectonics Project-ANATEC	bbp00039
TUBA
National Science Foundation	EAR-0949446, EAR-1550901
Türkiye Bilimsel ve Teknolojik Araştırma Kurumu
Türkiye Bilimler Akademisi

Belgeye Erişim

10.1016/j.epsl.2023.118309

Diğer Dosyalar ve Linkler

Link to publication in Scopus

Alıntı Yap

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title = "Crustal flow driving twin domes exhumation and low-angle normal faulting in the Menderes Massif of western Anatolia",

abstract = "Lower crustal flow in regions of post-orogenic extension has been inferred to explain the exhumation of metamorphic core complexes and associated low-angle normal (detachment) fault systems. However, the origin of detachment faults, whether initially formed as high-angle or low-angle shear zones, and the extension is symmetric or asymmetric remains enigmatic. Here, we use numerical modeling constrained by geophysical and geological data to show that symmetric extension in the central Menderes Massif of western Anatolia is accommodated by the crustal flow. Our geodynamic model explains how opposite dipping Gediz and B{\"u}y{\"u}k Menderes detachment faults are formed by ∼40° footwall rotation. Model predictions agree with seismic tomography data that suggests updoming of lower crust beneath the exhumed massifs, represented as “twin domes” and a flat Moho. Our work helps to account for the genetic relation between the exhumation of metamorphic core complexes and low-angle normal faulting in both Cordillera and Aegean orogenic regions and has important implications on crustal dynamics in extensional provinces.",

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doi = "10.1016/j.epsl.2023.118309",

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T1 - Crustal flow driving twin domes exhumation and low-angle normal faulting in the Menderes Massif of western Anatolia

AU - Bodur, Ömer

AU - Göğüş, Oğuz Hakan

AU - Brune, Sascha

AU - Şengül Uluocak, Ebru

AU - Glerum, Anne

AU - Fichtner, Andreas

AU - Sözbilir, Hasan

PY - 2023/10/1

Y1 - 2023/10/1

N2 - Lower crustal flow in regions of post-orogenic extension has been inferred to explain the exhumation of metamorphic core complexes and associated low-angle normal (detachment) fault systems. However, the origin of detachment faults, whether initially formed as high-angle or low-angle shear zones, and the extension is symmetric or asymmetric remains enigmatic. Here, we use numerical modeling constrained by geophysical and geological data to show that symmetric extension in the central Menderes Massif of western Anatolia is accommodated by the crustal flow. Our geodynamic model explains how opposite dipping Gediz and Büyük Menderes detachment faults are formed by ∼40° footwall rotation. Model predictions agree with seismic tomography data that suggests updoming of lower crust beneath the exhumed massifs, represented as “twin domes” and a flat Moho. Our work helps to account for the genetic relation between the exhumation of metamorphic core complexes and low-angle normal faulting in both Cordillera and Aegean orogenic regions and has important implications on crustal dynamics in extensional provinces.

AB - Lower crustal flow in regions of post-orogenic extension has been inferred to explain the exhumation of metamorphic core complexes and associated low-angle normal (detachment) fault systems. However, the origin of detachment faults, whether initially formed as high-angle or low-angle shear zones, and the extension is symmetric or asymmetric remains enigmatic. Here, we use numerical modeling constrained by geophysical and geological data to show that symmetric extension in the central Menderes Massif of western Anatolia is accommodated by the crustal flow. Our geodynamic model explains how opposite dipping Gediz and Büyük Menderes detachment faults are formed by ∼40° footwall rotation. Model predictions agree with seismic tomography data that suggests updoming of lower crust beneath the exhumed massifs, represented as “twin domes” and a flat Moho. Our work helps to account for the genetic relation between the exhumation of metamorphic core complexes and low-angle normal faulting in both Cordillera and Aegean orogenic regions and has important implications on crustal dynamics in extensional provinces.

KW - geodynamic modeling

KW - lower crustal flow

KW - western Anatolia

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U2 - 10.1016/j.epsl.2023.118309

DO - 10.1016/j.epsl.2023.118309

M3 - Article

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SN - 0012-821X

VL - 619

JO - Earth and Planetary Science Letters

JF - Earth and Planetary Science Letters

M1 - 118309

ER -

Crustal flow driving twin domes exhumation and low-angle normal faulting in the Menderes Massif of western Anatolia

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