Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 10 of 10
Full-Text Articles in Physical Sciences and Mathematics
Tectonic Implications Of The Mw 6.8, 30 October 2020 Kuşadası Gulf Earthquake In The Frame Of Active Faults Of Western Turkey, Erhan Altunel, Ali̇ Pinar
Tectonic Implications Of The Mw 6.8, 30 October 2020 Kuşadası Gulf Earthquake In The Frame Of Active Faults Of Western Turkey, Erhan Altunel, Ali̇ Pinar
Turkish Journal of Earth Sciences
A Mw 6.8 earthquake struck Western Turkey and Eastern Greece that occurred on October 30, 2020 in Kuşadası Gulf. The earthquake epicentre is located north of Samos Island and the focal mechanism solution shows that a normal fault was reactivated. The main shock and aftershock analysis imply that the large earthquake occurred on a north dipping normal fault which might be the western continuation of the Efes Fault in Western Turkey. We propose that the western continuation of the Efes Fault steps over right somewhere in northeast of Samos Island and continues further west along the northwest margin of the …
Coseismic Surface Deformation And Fault Model Of The 27 May 2017 Mw 5.2 Saruhanlı-Manisa (Western Turkey) Earthquake From Insar, Ahmet Murat Akoğlu
Coseismic Surface Deformation And Fault Model Of The 27 May 2017 Mw 5.2 Saruhanlı-Manisa (Western Turkey) Earthquake From Insar, Ahmet Murat Akoğlu
Turkish Journal of Earth Sciences
The shortened revisit times and accurate orbits of the new generation of radar satellites like Sentinel-1 improved the applicability of the synthetic aperture radar interferometry (InSAR) technique to investigate more moderate size events. Here the technique is used to characterize the 27 May 2017 Mw 5.2 Saruhanlı (Manisa) earthquake that took place in western Turkey in the Gediz Graben. Though seismological focal mechanism solutions of the earthquake clearly indicated that the event is due to normal faulting, the nodal plane ambiguity and the presence of two closely located faults in the epicentral region prevented the assessment of the causative fault. …
Structure Of The Büyük Menderes Graben Systems From Gravity Anomalies, Emre Ti̇mur, İlknur Kaftan, Coşkun Sari, Müjgan Şalk
Structure Of The Büyük Menderes Graben Systems From Gravity Anomalies, Emre Ti̇mur, İlknur Kaftan, Coşkun Sari, Müjgan Şalk
Turkish Journal of Earth Sciences
The Büyük Menderes Graben (BMG) of western Turkey is bounded by E-W oriented normal faults and has been a depositional center for thick sedimentary layers since the Miocene. Four Mio-Pliocene depressions (from west to east, the Çine, Bozdoğan, Karacasu, and Denizli basins) having overall N-S trends are situated just south of the BMG. In this study, we focused on the structural characteristics of the BMG using Bouguer gravity data covering the area between 37°N and 39°N and 26°30'E and 30°E and gravity data along 4 profiles to estimate the discontinuous basement relief of the BMG. Our main objectives were to …
Structural Analyses Of Şaphane Relay Ramps And Fault Linkage Evolution In Active Extensional Regime, Western Turkey, Şule Gürboğa
Structural Analyses Of Şaphane Relay Ramps And Fault Linkage Evolution In Active Extensional Regime, Western Turkey, Şule Gürboğa
Turkish Journal of Earth Sciences
The Şaphane relay ramps (SAR-I and SAR-II) are well-developed structures formed by extensional tectonic settings in western Turkey. Their formation is controlled by the configuration of 2 different breaching faults located in between and the overlapping area of 3 normal faults, which are the Şaphane, Gürlek, and Yumrutaş faults. The relay ramps form within a ~3 km-wide and ~12 km-long interaction zone between 045° and 060° trending faults on the northern boundary of the Erdoğmuş-Yenigediz graben. Some variations in structural styles and its products (for example, overlapping slip-lines (slickenlines), fractures, and antithetic-synthetic faults) are observed along the breaching faults in …
Miocene Palynoflora Of The Kocaçay And Cumaovası Basins: A Contribution To The Synthesis Of Miocene Palynology, Palaeoclimate, And Palaeovegetation In Western Turkey, Mi̇ne Sezgül Kayseri̇ Özer, Hasan Sözbi̇li̇r, Funda Akgün
Miocene Palynoflora Of The Kocaçay And Cumaovası Basins: A Contribution To The Synthesis Of Miocene Palynology, Palaeoclimate, And Palaeovegetation In Western Turkey, Mi̇ne Sezgül Kayseri̇ Özer, Hasan Sözbi̇li̇r, Funda Akgün
Turkish Journal of Earth Sciences
Palynofloras of the Kocaçay and Cumaovası basins in western Turkey that belong to a time-span from the late Early to late Middle Miocene (the late Burdigalian-Serravallian) are studied and compared with published palynofloras of Europe and Turkey. Palynological data and numerical climatic results obtained by the coexistence approach indicate palaeoclimate changed from warm subtropical to temperate during the late Burdigalian-Serravallian. Moreover, the palaeoclimates of the Kocaçay and Cumaovası basins are compared with continental palaeoclimatic records of coal-bearing sediments in western Turkey and current temperatures in the İzmir region. According to this comparison, palaeoclimatic results of these basins and other localities …
A 3d Model For The Formation Of Turtleback Surfaces: The Horzum Turtleback Of Western Turkey As A Case Study, Gürol Seyi̇toğlu, Veysel Işik, Korhan Esat
A 3d Model For The Formation Of Turtleback Surfaces: The Horzum Turtleback Of Western Turkey As A Case Study, Gürol Seyi̇toğlu, Veysel Işik, Korhan Esat
Turkish Journal of Earth Sciences
Turtleback surfaces are common elements of highly extended terrains all over the world. This paper presents a 3D model explaining the formation of turtleback surfaces based on field observations made on the Horzum Turtleback of the Alaşehir graben, western Turkey. Three essential features have been determined as forming a turtleback surface. These are 1) the rolling hinge mechanism on a normal fault system, where the initial fault stays operational after forming second and third normal faults in its hanging wall; 2) relay ramps between initial fault segments; and 3) a synextensional intrusion on the shear zone of the initial normal …
Stream Sediment Geochemical Exploration For Gold In The Kazdağ Dome In The Biga Peninsula, Western Turkey, Hüseyi̇n Yilmaz
Stream Sediment Geochemical Exploration For Gold In The Kazdağ Dome In The Biga Peninsula, Western Turkey, Hüseyi̇n Yilmaz
Turkish Journal of Earth Sciences
The Tuztaşı Au-Ag mineralized system was discovered within the Kazdağ dome using BLEG (bulk leach extractable gold) and 180-µm stream sediment geochemical data collected across the Biga Peninsula in western Turkey. The deposit is located within the hinge of an antiform consisting mainly of high-grade metamorphic and mélange rocks that include the Altınoluk Pb-Zn-Cu-Ag-Au and Evciler Fe-Au-Cu deposits on the southern and on the northern flanks, respectively; no mineralization has been reported prior to this work which was first carried out in 1996 between Altınoluk and Evciler. The BLEG Ag/Au ratios at Tuztaşı (max 87) and Altınoluk (max 43) are …
Stratigraphy And Geochronology Of The Early Miocene Volcanic Units In The Bigadiç Borate Basin, Western Turkey, Fuat Erkül, Cahi̇t Helvaci, Hasan Sözbi̇li̇r
Stratigraphy And Geochronology Of The Early Miocene Volcanic Units In The Bigadiç Borate Basin, Western Turkey, Fuat Erkül, Cahi̇t Helvaci, Hasan Sözbi̇li̇r
Turkish Journal of Earth Sciences
Western Turkey has undergone an intense deformation which has given rise to two types of basins since the Late Oligocene: NE-trending and E-W-trending basins situated on the basement rocks of the Menderes Massif, the Sakarya Zone, the Lycian nappes and the Bornova Flysch Zone. One of the NE-trending basins, the Bigadiç borate basin, is located in the Bornova Flysch Zone - a 50-90-km-wide zone between the Sakarya Zone and the Menderes Massif. Lower Miocene successions are dominated by lacustrine, fluvial, evaporitic sedimentary rocks and numerous NE-trending volcanic centres which produced considerable amounts of lava and volcaniclastic detritus in the Bigadiç …
Halitpaşa Transpressive Zone: Implications For An Early Pliocene Compressional Phase In Central Western Anatolia, Turkey, Orhan Kaya, Engi̇n Ünay, Gerçek Saraç, Silke Eichhorn, Sabine Hassenrück, Andrea Knappe, Asaf Pekdeğer, Serdar Mayda
Halitpaşa Transpressive Zone: Implications For An Early Pliocene Compressional Phase In Central Western Anatolia, Turkey, Orhan Kaya, Engi̇n Ünay, Gerçek Saraç, Silke Eichhorn, Sabine Hassenrück, Andrea Knappe, Asaf Pekdeğer, Serdar Mayda
Turkish Journal of Earth Sciences
The Late Cenozoic evolution of the eastern Aegean is dominated by widespread continental extension. The most prominent structures are E-W- and NE-SW-trending grabens and intervening horsts, while NW-SE- and N-S-trending faults form the other less important structures. This paper documents the results of recent geological mapping and structural and stratigraphical analysis from the Halitpaşa half graben, which forms the northwestern continuation of the Gediz Graben. Field evidence for a new NW-SE-trending dextral wrench-dominated fault zone (here named the Halitpaşa transpression zone), which involved the thrusting of pre-Palaeogene basement onto Upper Miocene-Lower Pliocene sediments, is presented. The fault zone is correlated …
Extensional Tectonics And The Geometry Of Related Macroscopic Structures: Field Evidence From The Gediz Detachment, Western Turkey, Hasan Sözbi̇li̇r
Extensional Tectonics And The Geometry Of Related Macroscopic Structures: Field Evidence From The Gediz Detachment, Western Turkey, Hasan Sözbi̇li̇r
Turkish Journal of Earth Sciences
The large-scale, low-angle Gediz detachment fault that constitutes the southern margin of the Gediz graben (also known as the Alaşehir graben) has macroscopic structures of extensional origin, such as folds and back-tilted strata. The folds were formed as antiformal and synformal structures with axes both parallel and perpendicular to the extensional direction in their footwalls and hanging-walls, respectively. An extension-parallel antiform-synform pair in the footwall of the Gediz detachment, namely the Oyukkıran antiform and the Keserler synform, are recognized south of Dereköy village (Salihli) on the southern margin of the Gediz graben. These are NE-trending domal and basinal structures with …