Crustal flow driving twin domes exhumation and low-angle normal faulting in the Menderes Massif of western Anatolia
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Tarih
2023
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier
Erişim Hakkı
info:eu-repo/semantics/openAccess
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 Buyuk Menderes detachment faults are formed by -40 & DEG; 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.& COPY; 2023 Elsevier B.V. All rights reserved.
Açıklama
Anahtar Kelimeler
geodynamic modeling, lower crustal flow, western Anatolia
Kaynak
Earth and Planetary Science Letters
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
619
