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Articles 151 - 180 of 917
Full-Text Articles in Earth Sciences
Geological Structure Informs Rupture Propagation And Surface Rupture Complexity During The 2016 Kaik?Ura Earthquake, New Zealand: Insights For Future Large Earthquake Hazard, Kelvin Berryman, Mark Rattenbury, Stephen Bannister, Susan Ellis, Pilar Villamor, Donna Eberhart-Phillips, Phaedra Upton, Andrew Howell
Geological Structure Informs Rupture Propagation And Surface Rupture Complexity During The 2016 Kaik?Ura Earthquake, New Zealand: Insights For Future Large Earthquake Hazard, Kelvin Berryman, Mark Rattenbury, Stephen Bannister, Susan Ellis, Pilar Villamor, Donna Eberhart-Phillips, Phaedra Upton, Andrew Howell
Turkish Journal of Earth Sciences
We summarise the geological setting of complex surface rupture of the 2016 Mw 7.8 Kaik?ura earthquake in the Marlborough Tectonic Domain of New Zealand. The event was complex both seismologically and geologically but not totally dissimilar to other large historical events globally. The earthquake occurred in the comprehensively imbricated, steeply-dipping Pahau Terrane crust that exhibits numerous tectonic overprints with diverse faulting styles. The current strike slip faults of the Marlborough Fault System are immature in their structural development and occupy, at least in part, inherited faults of earlier deformation phases. Several of the faults that ruptured in 2016 may connect …
Paleoseismology Of The Ganos Segment; The Western Extend Of The North Anatolian Fault (Turkey), Murat Ersen Aksoy, Mustapha Meghraoui, Matthieu Ferry, Zi̇yadi̇n Çakir, Gülsen Uçarkuş, Taylan Sançar, Mehmet Uğur Altin
Paleoseismology Of The Ganos Segment; The Western Extend Of The North Anatolian Fault (Turkey), Murat Ersen Aksoy, Mustapha Meghraoui, Matthieu Ferry, Zi̇yadi̇n Çakir, Gülsen Uçarkuş, Taylan Sançar, Mehmet Uğur Altin
Turkish Journal of Earth Sciences
The Ganos fault that ruptured on 9 August 1912 (Mw: 7.4) is the westernmost inland segment of the North Anatolian fault (NAF). Here, the Ganos fault is bounded at its two tips with offshore faults segments, in the Sea of Marmara to the east and the Gulf of Saros to the west in the North Aegean Trough. Therefore, the paleoseismology of the 45-km-long inland fault is of importance to the seismic hazard analysis related to offshore active faults and in particular for the seismic gap in the Marmara Region. Earlier studies have established an earthquake chronology for the western and …
Paleoseismology Of The Sürgü And Çardak Faults - Splays Of The Eastern Anatolian Fault Zone, Türkiye, Musa Balkaya, Hüsnü Serdar Akyüz, Süha Özden
Paleoseismology Of The Sürgü And Çardak Faults - Splays Of The Eastern Anatolian Fault Zone, Türkiye, Musa Balkaya, Hüsnü Serdar Akyüz, Süha Özden
Turkish Journal of Earth Sciences
The sinistral East Anatolian Fault Zone (EAFZ) and the dextral North Anatolian Fault Zone (NAFZ) are two important strike-slip faults that delimit the boundaries of the Anatolian plate. The north-south directed compressional forces in eastern Türkiye trigger the westward escape of the Anatolian plate along these prominent structures. This study aims to reveal the earthquake history of the Sürgü and Çardak faults, which are important fault segments that splay from the EAFZ. In this context, overall, four paleoseismologic trenches were dug, two trenches on the Sürgü Fault and two trenches on the Çardak Fault. Along the Sürgü Fault, at least …
Land Subsidence Due To Natural Gas Extraction In The Thrace Basin (Nw Turkey) And Its Influence On The North Anatolian Fault Under The Marmara Sea, Tohid Nozadkhalil, Zi̇yadi̇n Çakir, Semi̇h Ergi̇ntav, Uğur Doğan, Thomas R. Walter
Land Subsidence Due To Natural Gas Extraction In The Thrace Basin (Nw Turkey) And Its Influence On The North Anatolian Fault Under The Marmara Sea, Tohid Nozadkhalil, Zi̇yadi̇n Çakir, Semi̇h Ergi̇ntav, Uğur Doğan, Thomas R. Walter
Turkish Journal of Earth Sciences
We map surface deformation in the Thrace region of Turkey using the Sentinel-1 Synthetic Aperture Radar (SAR) data. Interferometric Synthetic Aperture Radar (InSAR) time series analysis of the SAR data acquired between 2014 and 2020 on ascending and descending orbits reveals large-scale subsidence (~110 × 60 km) with rates reaching up to 10 ± 1.5 mm/yr. We relate this deformation to natural gas reservoir operations, such as gas exploitation and extraction activities that have been taking place in the region for decades, an inference being supported by the strong correlation between the InSAR time series and the variation in natural …
Pithonellid Calcitarch Record In The Middle? Cenomanian Derdere-A Member, Se Turkey: Palaeoenvironmental Changes And Stratigraphic Significance, Oğuz Mülayi̇m, İsmai̇l Ömer Yilmaz, Bruno Ferré
Pithonellid Calcitarch Record In The Middle? Cenomanian Derdere-A Member, Se Turkey: Palaeoenvironmental Changes And Stratigraphic Significance, Oğuz Mülayi̇m, İsmai̇l Ömer Yilmaz, Bruno Ferré
Turkish Journal of Earth Sciences
Pithonellid calcitarchs are studied in the organic-rich limestones of the Derdere-A Member from the middle? Cenomanian deposits of SE Turkey for the first time. Little is known about the distribution of pithonellid calcitarchs in the Cretaceous strata of Turkey. Three morphogroups of pithonellid calcitarchs are distinguished: they are represented by Pithonella sphaerica (Kaufmann, 1865) and P. ovalis (Kaufmann, 1865), both dominating the pithonellid assemblages, and by Bonetocardiella conoidea (Bonet, 1956), this latter being less abundant. Compared to the relative abundance of Upper Cretaceous pithonellid calcitarchs in the study area, the diversity is extremely low. The significant increase in abundance of …
Multiphase Deformation, Fluid Flow And Mineralization In Epithermal Systems: Inferences From Structures, Vein Textures And Breccias Of The Kestanelik Epithermal Au-Ag Deposit, Nw Turkey, Ni̇lay Gülyüz, Zoe Kai̇ Shipton, İlkay Kuşcu
Multiphase Deformation, Fluid Flow And Mineralization In Epithermal Systems: Inferences From Structures, Vein Textures And Breccias Of The Kestanelik Epithermal Au-Ag Deposit, Nw Turkey, Ni̇lay Gülyüz, Zoe Kai̇ Shipton, İlkay Kuşcu
Turkish Journal of Earth Sciences
We investigate the multiphase deformation, fluid flow, and mineralization processes in epithermal systems by presenting a detailed study of vein textures and breccias of the Kestanelik epithermal Au-Ag deposit, NW Turkey. The mineralization in the deposit is associated with several quartz veins. Fault-hosted veins and mode I veins share many textural and breccia characteristics owing to (i) overprinting of tectonic breccias formed during coseismic rupturing by subsequent coseismic hydrothermal brecciation and (ii) reworking of earlier vein breccia phases by repeated rupturing and hydraulic fracturing events. The spatial distribution of breccias at fault-hosted veins proposes that power of coseismic hydrothermal brecciation …
Hydrogeochemical Pattern And Environmental Isotope Hydrology Of Coastal Bademli Geothermal Area (Bga) In Western Turkey (Dikili-İzmir): A New Geothermal Prospect, Adi̇le Meli̇s Somay Altaş, Ünsal Gemi̇ci̇
Hydrogeochemical Pattern And Environmental Isotope Hydrology Of Coastal Bademli Geothermal Area (Bga) In Western Turkey (Dikili-İzmir): A New Geothermal Prospect, Adi̇le Meli̇s Somay Altaş, Ünsal Gemi̇ci̇
Turkish Journal of Earth Sciences
Bademli geothermal area (BGA) is located on the coastline of Dikili-İzmir province and consists of Bademli spring and Hayıtlı areas with 36.8-51°C discharge temperatures, respectively. The waters of Hayıtlı borehole have remarkable seawater mixing ratios like Bademli spring and have Na-Cl water type. Dikili group pyroclastic volcanic units constitute the reservoir rock in the entire geothermal area. The heat source is relatively elevated geothermal gradient caused by extensional tectonics forming E-W trending grabens. Bademli thermal water is plotted in the "immature waters" area in the Na-K-Mg triangular diagram with a calculated seawater contribution of 18%. Therefore, some cation geothermometers are …
Evidence For Surface Rupture Of The 1939 Erzincan Earthquake Based On Field Data And Paleoseismology On The Ezinepazarı Fault (North Anatolian Fault Zone, Central Anatolia), Fi̇kret Koçbulut
Turkish Journal of Earth Sciences
The Ezinepazarı Fault (EPF) is an active segment that restricts the Niksar Basin in the central part of the North Anatolian Fault Zone and has been the source of the devastating Mw 8.0 earthquake in the last 100 years. Traces of the surface rupture of the EPF, which occurred in AD 1939, can still be observed in the field today as a right-lateral strike-slip character. While paleoseismological studies were mostly focused on the western part of the North Anatolian Fault Zone (NAFZ) in previous studies, the studies on the central and eastern parts of the NAFZ are rarely addressed. In …
Geology Of The Eastern Anatolian Plateau (Turkey): A Synthesis, Ali̇ Yilmaz, Gülteki̇n Topuz, Tuna Eken, Osman Candan, Hüseyi̇n Yilmaz
Geology Of The Eastern Anatolian Plateau (Turkey): A Synthesis, Ali̇ Yilmaz, Gülteki̇n Topuz, Tuna Eken, Osman Candan, Hüseyi̇n Yilmaz
Turkish Journal of Earth Sciences
The Eastern Anatolian Plateau (EAP), approximately 2000 m above sea level, is located between the Eastern Pontides to the north, the Arabian Platform to the south, and the Iranian Plateau to the east. It is characterized by approximately 6 km-thick Maastrichtian to Quaternary volcano-sedimentary cover which unconformably overlies continental and oceanic basement units. Overall, the outcrops of the pre-Maastrichtian basement are rare and include both continental and oceanic units. This led to drastically different interpretations of the nature of the pre-Maastrichtian basement as (i) the oceanic accretionary complex or (ii) continental crust and overlying ophiolitic mélange. This synthesis deals with …
Petrological Characteristics Of Gabbroic Intrusions In Southeastern Urmia-Dokhtar Magmatic Belt, Kerman Province, Iran: Evidence For Post-Eocene Mafic Magmatism, Zahra Najafi, Hamid Ahmadipour, Abbas Moradian, Fatemeh Sarjoughian, Kazuo Nakashima
Petrological Characteristics Of Gabbroic Intrusions In Southeastern Urmia-Dokhtar Magmatic Belt, Kerman Province, Iran: Evidence For Post-Eocene Mafic Magmatism, Zahra Najafi, Hamid Ahmadipour, Abbas Moradian, Fatemeh Sarjoughian, Kazuo Nakashima
Turkish Journal of Earth Sciences
At the south of the Bardsir, Kerman province, Iran, the southeastern part of the Urmia-Dokhtar magmatic arc (UDMA), a large number of gabbroic intrusions are intruded into the Eocene lava flows and pyroclastic rocks with the form of small stocks and dykes. In this paper, geochemical variations, magmatic evolutions, and the origin of these intrusions are investigated. The studied intrusions are characterized by fine-grained margins resulting from rapid cooling and flow differentiation. They display porphyritic texture and include coarse-grained clinopyroxene with diopside compositions (Wo = 46.89, En = 40.78, Fs = 12.32), plagioclase with labradorite composition (An = 54.14), and …
Neotectonic And Topographic Evolution Of The Bitlis-Zagros Fold-Thrust Belt, Se Turkey, Hali̇l Zorer, Yahya Öztürk, Azad Sağlam Selçuk
Neotectonic And Topographic Evolution Of The Bitlis-Zagros Fold-Thrust Belt, Se Turkey, Hali̇l Zorer, Yahya Öztürk, Azad Sağlam Selçuk
Turkish Journal of Earth Sciences
The Bitlis-Zagros Fold-Thrust Belt is one of the world?s largest deformation zones, extending from the Eastern Mediterranean in southern Turkey to in the south of Iran. This deformation zone is partitioned between different structures; however, little is known about the relative activities of these different structures and their effects on topography. An area located in the northern part of Bitlis- Zagros Fold-Thrust Belt, just south of the Eastern Anatolian Plateau was studied in detail to analyze the effect of active tectonism on topographic development. The effects of active deformation structures such as Hakkâri and Şirvan Fault Segments on the topographic …
Early Pliocene Arvicolinae And Cricetinae From The Locality Of Afşar, Western Turkey, Panagiotis Skandalos, Koen Lansing, Fatma Arzu Demi̇rel, Mehmet Ci̇hat Alçi̇çek, Serdar Mayda, Francien Dieleman, Lars W. Van Den Hoek Ostende
Early Pliocene Arvicolinae And Cricetinae From The Locality Of Afşar, Western Turkey, Panagiotis Skandalos, Koen Lansing, Fatma Arzu Demi̇rel, Mehmet Ci̇hat Alçi̇çek, Serdar Mayda, Francien Dieleman, Lars W. Van Den Hoek Ostende
Turkish Journal of Earth Sciences
The Afşar section, situated in the Dombayova graben in western Turkey, is one of the key localities for the study of the Pliocene of Anatolia. Two fossiliferous layers yielded micromammal assemblages, including various cricetine and arvicoline species. These include the species Mimomys cf. gracilis, Pliomys sp., Arvicolinae gen. sp. and the cricetines Cricetulus cf. ehiki and Cricetulus sp. in Afşar 1 and Mimomys hassiacus, M. gracilis, Pliomys graecus and Mesocricetus primitivus in Afşar 2. The cooccurence of these species indicates a dry and open spaced habitat. Based on the composition and stage of evolution of the hamster and vole species, …
Foraminiferal Micropaleontology Of The Harami Formation (Elazığ, Eastern Turkey), And Reassessment Of Its Age Based On Larger Benthic Foraminifera, Si̇bel Kayğili
Turkish Journal of Earth Sciences
The age and depositional environment of the Harami Formation were reevaluated based on the new larger benthic foraminiferal (LBF) data. LBF assemblage including Orbitoides medius (d'Archiac), O. megaloformis Papp and Küpper, O. gruenbachensis Papp, Pseudomphalocyclus blumenthali Meriç, Omphalocyclus macroporus (Lamarck), Sirtina cf. orbitoidiformis Brönnimann and Wirz, Hellenocyclina beotica Reichel, Lepidorbitoides campaniensis Van Gorsel, L. bisambergensis (Jaeger), L. cf. minor (Schlumberger), Pseudosiderolites vidali (Douville), and Siderolites gr. calcitrapoides Lamarck were determined in the formation. Based on this LBF assemblage data, the late Campanian-Maastrichtian age was assigned to the formation. The paleontological and sedimentological data indicate that the Harami Formation was deposited …
Update For Reactive Transport Modeling Of The Kızıldere Geothermal Field To Reduce Uncertainties In The Early Inspections, Selçuk Erol, Taylan Akin, Serhat Akin
Update For Reactive Transport Modeling Of The Kızıldere Geothermal Field To Reduce Uncertainties In The Early Inspections, Selçuk Erol, Taylan Akin, Serhat Akin
Turkish Journal of Earth Sciences
The development of carbon capture and storage techniques has become essential to reduce and mitigating CO2 emissions to the atmosphere. CarbFix1 and CarbFix2 projects carried out in Iceland demonstrated that the emissions of waste CO2 gas from geothermal power plants can be captured and mixed with the effluent geofluid and subsequently injected back into the geothermal reservoir. This experience gained in the CarbFix projects expanded into other geothermal fields around Europe, and one of the demonstration sites is the geothermal field in Turkey, Kızıldere. This paper focuses on the results of an updated study on early field evaluations with reactive …
New Triassic Finding In Andız Peninsula (İzmir, Western Turkey) And Comparison Of Pre-Neogene Sequences Of Andız And Karaburun Peninsulas: Stratigraphic And Tectonic Implications, İsmai̇l İşi̇ntek
Turkish Journal of Earth Sciences
This study aims to review the geology of the Andız Peninsula and compare the pre-Neogene Andız succession with the middle part of the Karaburun Peninsula to discuss the nature of the Paleozoic-Mesozoic boundary in the Karaburun Peninsula. The pre-Neogene units of the Andız Peninsula are represented by the Paleozoic Dikendağı, Triassic Gu?vercinlik, and Jurassic Nohutalan Formations. In this study, the Triassic carbonate rocks in the Andız Peninsula are paleontologically defined for the first time. The Megalodont-bearing Gu?vercinlik Formation contains a late Norian-Rhaetian characteristic foraminiferal assemblage consisting of Aulotortus gr. sinuosus, A. tenuis, A. friedli, A. impressus, and Triasina hantkeni. The …
Relationship Of Petrographic And Mineralogical Characteristics With Mechanical Strength Properties Of Granitic Rocks: A Case Study From The Biga Peninsula, Nw Turkey, Güven Eroğlu, Ayten Çalik
Relationship Of Petrographic And Mineralogical Characteristics With Mechanical Strength Properties Of Granitic Rocks: A Case Study From The Biga Peninsula, Nw Turkey, Güven Eroğlu, Ayten Çalik
Turkish Journal of Earth Sciences
This study was carried out on granitic rocks from the Biga Peninsula in order to investigate petrographic, and mineralogical properties in comparison with mechanical strength properties. This study was conducted in four different locations where granitic rocks outcrop from north to south in the Biga Peninsula: Lapseki (Şevketiye granite), Ezine (Kestanbol granite), Bayramiç (Yassıbağ granite), and Edremit (Eybek granite). Field observations and detailed petrographic studies of representative samples indicate that they are quartz monzodiorite (Şevketiye and Yassıbağ), quartz monzonite (Kestanbol), and granodiorite (Eybek) in composition. All the rocks have similar mineral composition, comprising mainly feldspar (plagioclase-alkali feldspar), quartz, mafic minerals …
Calcareous Nannofossils, Planktonic Foraminifera, And Revised Stratigraphy Of The Eocene Çayraz Formation; The Final Stage Of Marine Sedimentation In Central Anatolia, Turkey, Ali̇ Osman Yücel, Ercan Özcan, Rita Catanzariti, Aynur Hakyemez, Aral Okay, Tahsi̇n Atti̇la Çi̇ner, Ali̇ Akin
Calcareous Nannofossils, Planktonic Foraminifera, And Revised Stratigraphy Of The Eocene Çayraz Formation; The Final Stage Of Marine Sedimentation In Central Anatolia, Turkey, Ali̇ Osman Yücel, Ercan Özcan, Rita Catanzariti, Aynur Hakyemez, Aral Okay, Tahsi̇n Atti̇la Çi̇ner, Ali̇ Akin
Turkish Journal of Earth Sciences
New field observations and discovery of calcareous nannofossils and planktonic foraminifera from the 'shallow-marine' Çayraz Formation (Haymana Basin, Central Anatolia), a contributing Eocene section to the shallow benthic zonation (SBZ) in the Tethys, allow us to revise its stratigraphy and establish an integrated biostratigraphic scheme for the first time. The hemipelagic marls in the uppermost part of the Eskipolatlı Formation that underlies the Çayraz Formation yielded nannofossil assemblages of Zone CNE3, pinning down the initiation of the Çayraz shelf system into the 'middle' Ypresian. The prominent marly part (Member B) between the carbonate-clastic packages of the Çayraz Formation with prolific …
Fired Shards From Selected Ancient Anatolian Ceramics: A Brief Review Of Their Mineralogical Nature And Pedological?Microstructural Evolution, Seli̇m Kapur, Selahatti̇n Kadi̇r, Gilbert Kelling, Erhan Akça, Mustafa Topaksu, Necdet Sakarya, Zehra Yeği̇ngi̇l, Muhsi̇n Eren, Ewart Adsil Fitzpatrick
Fired Shards From Selected Ancient Anatolian Ceramics: A Brief Review Of Their Mineralogical Nature And Pedological?Microstructural Evolution, Seli̇m Kapur, Selahatti̇n Kadi̇r, Gilbert Kelling, Erhan Akça, Mustafa Topaksu, Necdet Sakarya, Zehra Yeği̇ngi̇l, Muhsi̇n Eren, Ewart Adsil Fitzpatrick
Turkish Journal of Earth Sciences
This review is concerned with some key features observed within grouped samples of ancient ceramics that provide important evidence concerning the selection of appropriate raw materials and the evolution of the firing technologies employed in their production. It also demonstrates the importance of distinguishing and accounting for the mineralogical and microstructural attributes and identifying the processes responsible for the microstructural evolution of these ancient ceramics. The mineralogy largely reflects both the nature of the raw materials used and the maximum temperatures achieved during firing, deduced from the presence of specific high temperature minerals (HTMs). The microstructural evolution processes, deduced by …
Micropaleontological Findings And Absolute Ages Mark The Termination Of The Last Glacial Maximum In The Eastern Mediterranean Region: New Electron Spin Resonance Data From Gediz Delta (Western Turkey), Eki̇n Gökçe Benli̇, Hülya Aslin, İsmai̇l İşi̇ntek, Bi̇rol Engi̇n, Berna Şengöçmen Geçki̇n
Micropaleontological Findings And Absolute Ages Mark The Termination Of The Last Glacial Maximum In The Eastern Mediterranean Region: New Electron Spin Resonance Data From Gediz Delta (Western Turkey), Eki̇n Gökçe Benli̇, Hülya Aslin, İsmai̇l İşi̇ntek, Bi̇rol Engi̇n, Berna Şengöçmen Geçki̇n
Turkish Journal of Earth Sciences
Sediments and fossil content of Gediz Delta (Eastern Aegean Sea-İzmir) were examined from the samples collected from three drilling cores from the west (seaward) to east (landward) of the delta. Each drilling core contains Quarternary marine deposits with a marine fauna of foraminifers, bivalves, gastropods, echinoids, and ostracods at the bottom and Quaternary continental delta deposits at the top. According to our Electron Spin Resonance (ESR) age model marine sediments of the Aegean Sea started to cover the western Gediz Delta area before 19.9 ka (thousand years). Following the Last Glacial Maximum (LGM), after the transgression due to deglaciation occurred …
Wide-Area Ground Deformation Monitoring In Geothermal Fields In Western Turkey, Gökhan Aslan, Hakki Aydin, Zi̇yadi̇n Çakir
Wide-Area Ground Deformation Monitoring In Geothermal Fields In Western Turkey, Gökhan Aslan, Hakki Aydin, Zi̇yadi̇n Çakir
Turkish Journal of Earth Sciences
The large-scale production and injection of geothermal fluids induce pressure, volume, and temperature gradient changes in the subsurface, which may result in surface deformation as well. Interferometric synthetic aperture radar (InSAR) is a promising utility for monitoring ground surface deformation and inferring subsurface reservoir operations that are difficult to observe directly. This study provides the first wide-area InSAR-derived long-term ground deformation across major geothermal fields in western Turkey. It aims to identify ground deformation hotspots within the geothermal exploitation sites and analyze their relationship with energy production and pumping. In the present study, the whole 2014?2020 Sentinel 1-A and 1-B …
Reducing Uncertainty With Fault Seal Analysis: A Case Study Of Jherruck Block, Lowerindus Basin, Pakistan, Mudassar Nawaz, Muhammad Rustam Khan, Umair Bin Nisar, Muhammad Rizwan Mughal
Reducing Uncertainty With Fault Seal Analysis: A Case Study Of Jherruck Block, Lowerindus Basin, Pakistan, Mudassar Nawaz, Muhammad Rustam Khan, Umair Bin Nisar, Muhammad Rizwan Mughal
Turkish Journal of Earth Sciences
Faults can be either conduits or baffles for hydrocarbon flow. Assessing the sealing potential of faults plays a vital role in reducing the risks associated with hydrocarbon exploration. The study area is located in Jherruck Block, Lower Indus Basin, Pakistan. Several intervals within the Lower Goru Formation in Lower Indus Basin are proven hydrocarbon reservoirs. The main aim of the study is to predict the cause of failure of 3 wells (Jherruck B-1, Jamali-1, and Jamali Deep-1), and to propose a new well location based on juxtaposition analysis and shale gouge ratio (SGR). The Upper Sands (sandstone) of the Lower …
Petrology, Geochemistry, And Geodynamic Implications Of The Ediacaran Volcanism Of The Southwestern Edge Of The Saghro Massif (Eastern Anti-Atlas, Morocco), Rachid Zahour, Ghalem Zahour, Hassan El Hadi, Youssef Zerhouni, Zouhair Baroudi, Mounia Khoukhouchi
Petrology, Geochemistry, And Geodynamic Implications Of The Ediacaran Volcanism Of The Southwestern Edge Of The Saghro Massif (Eastern Anti-Atlas, Morocco), Rachid Zahour, Ghalem Zahour, Hassan El Hadi, Youssef Zerhouni, Zouhair Baroudi, Mounia Khoukhouchi
Turkish Journal of Earth Sciences
The southwestern edge of the Saghro Massif experienced during the Ediacaran period an intense volcanic activity represented by basaltic andesites and acid rocks with ignimbritic dominance. The chemical characteristics of these rocks correspond to those of calc-alkaline orogenic magmatism related to a subduction zone. The genesis of these two rock groups does not seem to be controlled by the fractional crystallization process as a factor controlling their evolution. Partial melting of a lithospheric mantle still influenced by the Pan-African orogeny and a contaminated constituent of the lower continental crust is a likely source of the basaltic andesites. Ignimbrites represent the …
Shear Wave Velocity Estimation Based On The Particle Swarm Optimization Method Of Hvsr Curve Inversion In Bakauheni District, Indonesia, Ahmad Zaenudin, I Gede Boy Darmawan, Alhada Farduwin, Rahmat Catur Wibowo
Shear Wave Velocity Estimation Based On The Particle Swarm Optimization Method Of Hvsr Curve Inversion In Bakauheni District, Indonesia, Ahmad Zaenudin, I Gede Boy Darmawan, Alhada Farduwin, Rahmat Catur Wibowo
Turkish Journal of Earth Sciences
The Nakamura method, known as horizontal to vertical spectral ratio (HVSR), has been used to analyze site effect assessment. Over the past decade, various HVSR curve inversion methods for near-surface geophysical surveys have been developed. Particle swarm optimization (PSO) inversion method has been applied to solve the HVSR inversion curve to estimate the shear wave velocity (Vs) value towards the depth. In this study, the HVSR curve inversion experiment has been applied with two synthetic data: noise-free data and the other is contaminated by 10% random noise. This research aims to find out how the PSO algorithm performs to find …
Mineralogical And Geochemical Signatures Of Weathering On Carbonate Rocks And Dynamic Young Land Surfaces In Muğla Polje (Sw Turkey), Ceren Küçükuysal, Murat Gül, Tural Aghayev, Merve Gülcan
Mineralogical And Geochemical Signatures Of Weathering On Carbonate Rocks And Dynamic Young Land Surfaces In Muğla Polje (Sw Turkey), Ceren Küçükuysal, Murat Gül, Tural Aghayev, Merve Gülcan
Turkish Journal of Earth Sciences
Red soils as the weathering products in Muğla Polje (SW Turkey) show different occurrences either on hard and permeable limestone (terra rossa (TRs)) or within the matrix of transported sediments (alluvium-derived soils (ALs), alluvium-derived soils specifically from clastics (ALsc), paleosol (Pls), and colluvium-derived soils (CLs)). The purpose of this study is to unlock the effect of weathering on hard carbonate rocks and dynamic young land surfaces (alluvium and colluvium) in Muğla Polje for the first time in terms of mineralogical and geochemical compositions. TRs, the soils of more stable environments are clayey while ALs and CLs as being the soils …
A Case Study On Geomorphology: Tree-Ring-Based Confirmation Of The Formation Year Of Lake Kaindy After The 1911 Kemin Earthquake In Almaty (Kazakhstan), Ünal Akkemi̇k, Kuralay Mazarzhanova, Arailym Kopabayeva
A Case Study On Geomorphology: Tree-Ring-Based Confirmation Of The Formation Year Of Lake Kaindy After The 1911 Kemin Earthquake In Almaty (Kazakhstan), Ünal Akkemi̇k, Kuralay Mazarzhanova, Arailym Kopabayeva
Turkish Journal of Earth Sciences
Lake Kaindy, which is located in the Kazakhstan side of the Tien Shan Mountains is one of the most famous places in the World due to having sunken Picea schrenkiana Fisch. & C.A.Mey. trees within the Lake. The purpose of the study is to find the dead years of the sunken trees in the lake and therefore to confirm the formation time of Kaindy Lake, and if there is an effect of the 1911 Kemin earthquake on the tree-ring width of Picea schrenkiana around the lake. Eight wood pieces and two increment cores from the sunken trees were taken to …
Exploring The Untapped Gas Potential Of Ghazij Shale In Pirkoh Area, Pakistan: Integratedapproach Of Attribute Analysis And Maturity Modeling, Muhammad Raiees Amjad, Sarfraz Khan, Umair Bin Nisar, Urooj Shakir, Khawar Ashfaq Ahmed
Exploring The Untapped Gas Potential Of Ghazij Shale In Pirkoh Area, Pakistan: Integratedapproach Of Attribute Analysis And Maturity Modeling, Muhammad Raiees Amjad, Sarfraz Khan, Umair Bin Nisar, Urooj Shakir, Khawar Ashfaq Ahmed
Turkish Journal of Earth Sciences
A correlative maturity study integrated with seismic attributes for determining the shale gas potential of Ghazij Formation is carried out. Analysis of post-stack seismic attributes has been frequently used to identify areas of high exploration potential within shale resource plays. Seismic and well data have been utilized for the analysis of maturity trends in the shale facies of Ghazij Formation. Total organic carbon content (TOC), burial history, Vitrinite Reflectance (Ro), thermal history and porosity values have been computed at Pirkoh-01 well, which are laterally compared with the maturity results in Bambor and Sui areas. In addition, analysis is carried out …
Mineralogical And Paleobotanical Investigations Of Oligo-Miocene Petrified Wood Fromthe Southwest Of Thrace Basin (Nw Turkey), Burcu Üner, Sabah Yilmaz Şahi̇n, Ünal Akkemi̇k
Mineralogical And Paleobotanical Investigations Of Oligo-Miocene Petrified Wood Fromthe Southwest Of Thrace Basin (Nw Turkey), Burcu Üner, Sabah Yilmaz Şahi̇n, Ünal Akkemi̇k
Turkish Journal of Earth Sciences
Petrified wood samples are found within terrestrial sediments belonging to the Late Oligocene-Early Miocene Danişmen Formation in Malkara-Keşan located in the southwest of the Thrace Basin. The petrified wood in both regions is usually silicified and partly coalified. The silicification of the Tertiary wood in the Malkara-Keşan region is associated with volcanic activity and coeval sedimentation. Thin sections from petrified wood samples were taken as transverse, tangential, and radial sections. The mineralogicalpetrographic- botanical studies were carried out under a polarizing and botanical microscope. Opal-moganite-chalcedony-quartz, which are different polymorphs of silica, were detected under the microscope in the petrified wood. Results …
Structural Interpretation And Petrophysical Approach For Subsurface Fractureidentification Of Joya Mair Area, Nw-Himalayas, Pakistan, Palwasha Shahzad Rathore, Muhammad Armaghan Faisal Miraj, Muhammad Bilal Malik, Sher Afgan, Rana Faizan Saleem, Shan Shahzad, Irza Akhtar
Structural Interpretation And Petrophysical Approach For Subsurface Fractureidentification Of Joya Mair Area, Nw-Himalayas, Pakistan, Palwasha Shahzad Rathore, Muhammad Armaghan Faisal Miraj, Muhammad Bilal Malik, Sher Afgan, Rana Faizan Saleem, Shan Shahzad, Irza Akhtar
Turkish Journal of Earth Sciences
Identification of fracture zone is a challenging task without the image log data. There are many brownfields around the world where the image log has not been acquired; therefore, there must be an alternative way of fracture identification. In this paper, a conventional log response technique for fracture delineation has been discussed. The study area lies in the Upper Indus Basin of Pakistan, which is sub-divided into the Kohat and Potwar basins. Minwal-X-1 of Joya Mair area, which lies in the Potwar Basin, is selected for this purpose. Eocene limestone units are formed due to fracture porosity. The objective of …
No Sand Shipment For Cleopatra By Antonius: Resedimentary Origin For The Ooidal Sand Beach Of Sedir Island (Aegean Coast Of Sw Anatolia), Mehmet Ci̇hat Alçi̇çek
No Sand Shipment For Cleopatra By Antonius: Resedimentary Origin For The Ooidal Sand Beach Of Sedir Island (Aegean Coast Of Sw Anatolia), Mehmet Ci̇hat Alçi̇çek
Turkish Journal of Earth Sciences
No abstract provided.
Middle-Late Devonian Boundary Conodonts From Anarak And Sar-Ashk Sections, Centraliran, Hossein Gholamalian, Vachik Hairapetian, Mohammad Poosti
Middle-Late Devonian Boundary Conodonts From Anarak And Sar-Ashk Sections, Centraliran, Hossein Gholamalian, Vachik Hairapetian, Mohammad Poosti
Turkish Journal of Earth Sciences
The Middle/Late Devonian boundary is investigated based on twenty-four conodont species and subspecies from the Anarak and Sar-Ashk sections in the northwest and southeast of Central East Iran Microplate. The earliest Frasnian strata are defined by the first appearance of Ancyrodella rotundiloba pristina and can be correlated with the global stratotype in the Montagne Noir, South of France. The Late Givetian - Early Frasnian carbonates of the Bahram Formation in the Sar-Ashk section transgressively overlie the sandstones of the Padeha Formation, whereas the coeval interval in the Anarak section composes the middle part of the Bahram Formation. Conodont biostratigraphy of …