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Articles 511 - 540 of 917
Full-Text Articles in Earth Sciences
First Report Of Sphaeronitid Blastozoans (Echinodermata) In The Middle Ordovician Of The Taurides, Turkey, Elise Nardin, Mehmet Cemal Göncüoğlu, Bertrand Lefebvre
First Report Of Sphaeronitid Blastozoans (Echinodermata) In The Middle Ordovician Of The Taurides, Turkey, Elise Nardin, Mehmet Cemal Göncüoğlu, Bertrand Lefebvre
Turkish Journal of Earth Sciences
Articulated echinoderm remains are described for the first time in the Ordovician of Turkey. They occur massively, forming a relatively thick cystoid bed within the detrital limestone succession of the Sobova Formation (latest Dapingianearliest Darriwilian) in the western Taurus Mountains. The cystoid bed encompasses a monospecific echinoderm assemblage of densely packed, 3-dimensionally preserved thecae. The presence of numerous suborganised plates with diplopore respiratory structures suggests probable affinities with sphaeronitid blastozoans. Comparable sphaeronitid dense beds are well known in the early Darriwilian of Baltica, and in the mid Darriwilian of the Middle East and Asian terranes.
New Fossils Of Gaindatherium (Rhinocerotidae, Mammalia) From The Middle Miocene Of Pakistan, Abdul Majid Khan, Esperanza Cerdeño, Muhammad Akhtar, Muhammad Akbar Khan, Ayesha Iqbal, Muhammad Mubashir
New Fossils Of Gaindatherium (Rhinocerotidae, Mammalia) From The Middle Miocene Of Pakistan, Abdul Majid Khan, Esperanza Cerdeño, Muhammad Akhtar, Muhammad Akbar Khan, Ayesha Iqbal, Muhammad Mubashir
Turkish Journal of Earth Sciences
New isolated teeth with maxillary and mandibular fragments from the Chinji Formation of the Lower Siwaliks are described and determined as Gaindatherium browni and Gaindatherium vidali. This material comes from the Middle Miocene of Lava and Dhok Bun Ameer Khatoon localities, northern Pakistan, and significantly increases the number of remains previously known for this rhinocerotid genus. Specimens from the Lava site determined as G. vidali present morphological differences with respect to those of G. browni, being similar to those of G. vidali from the Nagri Formation, showing a greater size. Previously, G. vidali was reported only from the Nagri Formation …
Reply To Comment By Erkül And Erkül On Al-In-Hornblende Thermobarometry And Sr-Nd-O-Pb Isotopic Compositions Of The Early Miocene Alaçam Granite In Nw Anatolia (Turkey), Altuğ Hasözbek, Burhan Erdoğan, Muharrem Satir, Wolfgang Siebel, Erhan Akay, Güllü Deni̇z Doğan, Heinrich Taubald
Reply To Comment By Erkül And Erkül On Al-In-Hornblende Thermobarometry And Sr-Nd-O-Pb Isotopic Compositions Of The Early Miocene Alaçam Granite In Nw Anatolia (Turkey), Altuğ Hasözbek, Burhan Erdoğan, Muharrem Satir, Wolfgang Siebel, Erhan Akay, Güllü Deni̇z Doğan, Heinrich Taubald
Turkish Journal of Earth Sciences
No abstract provided.
Eocene To Early Oligocene Turbidite Sedimentation In The Se Aegean (Karpathos Island, Se Greece): Stratigraphy, Facies Analysis, Nannofossil Study,And Possible Hydrocarbon Potential, George Pantopoulos, Avraam Zelilidis
Eocene To Early Oligocene Turbidite Sedimentation In The Se Aegean (Karpathos Island, Se Greece): Stratigraphy, Facies Analysis, Nannofossil Study,And Possible Hydrocarbon Potential, George Pantopoulos, Avraam Zelilidis
Turkish Journal of Earth Sciences
Paleogene turbidite deposits that outcrop at the SE Aegean (Karpathos Island, SE Greece) were investigated using sedimentological, biostratigraphical, and organic geochemical techniques. Results indicate that turbidite sedimentation in the area took place from the Early Eocene (NP12-14) to Late Eocene-Early Oligocene (NP20-21). Six different units were recognized in the turbidite succession based on sedimentological characteristics, outcropping in 2 major areas of the island (1 in the north and 1 in the south) and having a thickness of less than 1000 m. Deposition and spatial arrangement of sedimentary facies was affected by the already deformed carbonate substratum and changes in the …
Source Of The Mineralizing Fluids In Ultramafic Related Magnesite In The Eskişehir Area, Northwest Turkey, Along The İzmir–Ankara Suture: A Stable Isotope Study, Asuman Kahya, Mustafa Kuşcu
Source Of The Mineralizing Fluids In Ultramafic Related Magnesite In The Eskişehir Area, Northwest Turkey, Along The İzmir–Ankara Suture: A Stable Isotope Study, Asuman Kahya, Mustafa Kuşcu
Turkish Journal of Earth Sciences
The Eskişehir magnesite deposits (Süleymaniye, Margı, and Tutluca) are located in the western part of the İzmir-Ankara Suture Zone, northwestern Turkey. These vein and stockwork type magnesite deposits, which occur along major and minor fault systems, are hosted by Alpine-type ultramafic rocks. The purpose of this study was to understand the origin of the hydrothermal waters responsible and the source of carbon dioxide, and to compare these deposits with similar magnesite occurrences in Turkey and elsewhere. Petrographic and XRD analyses indicate that magnesite was the major carbonate mineral formed. Deposits are predominantly micritic and locally microsparitic, but some also contain …
Comparative Geochemical Study Of Soils Developed On Characteristic Black And Yellow Polymetallic Massive Sulfide Deposits In Eastern Pontides (Ne Turkey), Nezi̇hi̇ Köprübaşi, Emi̇n Çi̇ftçi̇, Sai̇t Cordan, Necla Köprübaşi, Cafer Özkul, Fatma Şi̇şman Tükel
Comparative Geochemical Study Of Soils Developed On Characteristic Black And Yellow Polymetallic Massive Sulfide Deposits In Eastern Pontides (Ne Turkey), Nezi̇hi̇ Köprübaşi, Emi̇n Çi̇ftçi̇, Sai̇t Cordan, Necla Köprübaşi, Cafer Özkul, Fatma Şi̇şman Tükel
Turkish Journal of Earth Sciences
The Harşit-Köprübaşı (Tirebolu) and Killik (Espiye) volcanogenic massive sulfide (VMS) deposits occur in the Eastern Pontide tectonic belt, one of the major tectonic units comprising Anatolia. They are hosted by Late Cretaceous dacitic to rhyolitic rocks overlain by thin layers of pelitic sediments. The region is considered as a metallogenic province since it is a host to numerous VMS deposits, mainly of the Kuroko type, with varying sizes and reserves and with fairly similar geochemical and mineralogical characteristics. In this study, 489 soil samples were systematically collected from both known mineralized sites and remote areas that have no indication of …
Chemistry Of Magmatic And Alteration Minerals In The Chahfiruzeh Porphyry Copper Deposit, South Iran: Implications For The Evolution Of The Magmas And Physicochemical Conditions Of The Ore Fluids, Morteza Einali, Saeed Alirezaei, Federica Zaccarini
Chemistry Of Magmatic And Alteration Minerals In The Chahfiruzeh Porphyry Copper Deposit, South Iran: Implications For The Evolution Of The Magmas And Physicochemical Conditions Of The Ore Fluids, Morteza Einali, Saeed Alirezaei, Federica Zaccarini
Turkish Journal of Earth Sciences
The Chahfiruzeh deposit is a newly discovered porphyry-style copper deposit in the southern part of the Cenozoic Urumieh-Dokhtar magmatic arc of Iran. Mineralization is associated with a Miocene quartz-diorite to quartz-monzodiorite porphyritic intrusion (Chahfiruzeh porphyry) intruded into older basaltic and andesitic lava flows and pyroclastic rocks. Alteration assemblages and alteration zoning, typical of porphyry copper deposits, are well developed. Mineralization occurs in quartz-sulfide stockworks and as sulfide disseminations in the porphyritic intrusion and the immediate wall rocks. Pyrite and chalcopyrite are the main hypogene sulfide minerals; bornite and molybdenite are rare. Representative magmatic and alteration minerals, including plagioclase, amphibole, biotite, …
Terebella Lapilloides Münster, 1833 From The Upper Jurassic-Lower Cretaceous İnaltı Carbonates, Northern Turkey: Its Taxonomic Position And Paleoenvironmental-Paleoecological Significance, Mustafa Yücel Kaya, Demi̇r Altiner
Terebella Lapilloides Münster, 1833 From The Upper Jurassic-Lower Cretaceous İnaltı Carbonates, Northern Turkey: Its Taxonomic Position And Paleoenvironmental-Paleoecological Significance, Mustafa Yücel Kaya, Demi̇r Altiner
Turkish Journal of Earth Sciences
The agglutinating annelid Terebella lapilloides Münster, 1833 is commonly encountered in reefal deposits from the Late Jurassic. This annelid is described and documented for the first time from the Upper Jurassic-Lower Cretaceous carbonates of the İnaltı Formation in the Central Pontides, Turkey. The whole İnaltı formation, 395 m in thickness, was studied near Bürnük village and 105 samples were collected along the section. The investigated thin sections reveal the shallow water and the reefal/fore-reefal character of the carbonates with coral-sponge frame-builders. The bioconstituents are accompanied by various microencrusters and microproblematica (such as Lithocodium aggregatum, Bacinella-type structures, Koskinobullina socialis, Radiomura cautica, …
Reservoir Characterization Of The Burqan Formation Sandstone From Midyan Basin, Northwestern Saudi Arabia, Abdulaziz Al-Laboun, Abdurrahman Al-Quraishi, Haider Zaman, Mohammed Benaafi
Reservoir Characterization Of The Burqan Formation Sandstone From Midyan Basin, Northwestern Saudi Arabia, Abdulaziz Al-Laboun, Abdurrahman Al-Quraishi, Haider Zaman, Mohammed Benaafi
Turkish Journal of Earth Sciences
The Early Miocene sandstone of the Burqan Formation from Midyan Basin is considered an oil-bearing unit. The outcrops of this sandstone, which are exposed in the northwestern part of the basin, have been studied through field and laboratory-based investigations. During the field work, 81 surface samples were collected for reservoir characterization. Laboratory analyses were undertaken to determine the effect of the diagenesis on the reservoir quality using integrated sedimentological, petrological, and petrophysical analyses. According to these analyses, the sandstone of Burqan Formation is predominately subarkosic and sublitharenite in nature, medium to course grained in size, rounded to subangular in shape, …
Development Of A Numerical 2-Dimensional Beach Evolution Model, Cüneyt Baykal
Development Of A Numerical 2-Dimensional Beach Evolution Model, Cüneyt Baykal
Turkish Journal of Earth Sciences
This paper presents the description of a 2-dimensional numerical model constructed for the simulation of beach evolution under the action of wind waves only over the arbitrary land and sea topographies around existing coastal structures and formations. The developed beach evolution numerical model is composed of 4 submodels: a nearshore spectral wave transformation model based on an energy balance equation including random wave breaking and diffraction terms to compute the nearshore wave characteristics, a nearshore wave-induced circulation model based on the nonlinear shallow water equations to compute the nearshore depth-averaged wave-induced current velocities and mean water level changes, a sediment …
Testing Of The Recently Developed Tectonomagmatic Discrimination Diagrams From Hydrothermally Altered Igneous Rocks Of 7 Geothermal Fields, Kailasa Pandarinath
Testing Of The Recently Developed Tectonomagmatic Discrimination Diagrams From Hydrothermally Altered Igneous Rocks Of 7 Geothermal Fields, Kailasa Pandarinath
Turkish Journal of Earth Sciences
Recently developed multidimensional tectonomagmatic discrimination diagrams based on log-ratio variables of chemical elements, discordant outlier-free databases, and probability-based boundaries have been shown to work better than the earlier diagrams. Hydrothermally altered drilled well rock cuttings obtained from different depths of geothermal fields were used to test these diagrams to compare the inferred tectonic setting with the expected one. In spite of the hydrothermal alteration effects, these diagrams provided the following expected tectonic settings: (1) an arc setting for Ahuachapán and Berlin geothermal fields, El Salvador; (2) a rift setting for Cerro Prieto geothermal field, Mexico, and Tendaho geothermal field, Afar …
Geology, Mineralogy, Geochemistry, And Depositional Environment Of A Late Miocene/Pliocene Fluviolacustrine Succession, Cappadocian Volcanic Province, Central Anatolia, Turkey, Ersel Göz, Selahatti̇n Kadi̇r, Ali̇ Gürel, Muhsi̇n Eren
Geology, Mineralogy, Geochemistry, And Depositional Environment Of A Late Miocene/Pliocene Fluviolacustrine Succession, Cappadocian Volcanic Province, Central Anatolia, Turkey, Ersel Göz, Selahatti̇n Kadi̇r, Ali̇ Gürel, Muhsi̇n Eren
Turkish Journal of Earth Sciences
This paper investigates the mineralogy, geochemistry, and depositional environment of Late Miocene/Pliocene fluviolacustrine deposits, including multiple ignimbrite levels and andesitic and basaltic lavas, within the Cappadocian Volcanic Province (CVP) of central Anatolia, Turkey. Palaeosols and calcretes formed within these terrestrial sedimentary rocks under near-surface or surface conditions. The palaeosols are composed predominantly of smectite ± illite with feldspar, quartz, calcite, opal-CT, and amphibole, and the calcretes mainly of calcite with minor feldspar, quartz, and accessory smectite ± palygorskite. The palygorskite occurs on and between the calcite crystals in the calcretes and at the edges of smectite flakes within the palaeosols, …
Whole-Rock Geochemistry Of Basic And Intermediate Intrusive Rocks In The Ishiagu Area: Further Evidence Of Anorogenic Setting Of The Lower Benue Rift, Southeastern Nigeria, Anthony Chukwu, Smart Chika Obiora
Whole-Rock Geochemistry Of Basic And Intermediate Intrusive Rocks In The Ishiagu Area: Further Evidence Of Anorogenic Setting Of The Lower Benue Rift, Southeastern Nigeria, Anthony Chukwu, Smart Chika Obiora
Turkish Journal of Earth Sciences
Petrographic studies on the intrusive rocks from the Ishiagu area show that they are gabbro, dolerites, and diorite. The gabbro and diorite occur as stocks while the dolerites occur as sills in folded sedimentary sequence predominated by shale. Geochemical data confirmed the rocks as basic (gabbro and dolerites) and intermediate (diorite) rocks with silica contents ranging from 42.45 to 50.75 wt.% and 55.03 to 60.24 wt.%, respectively. They are predominantly alkaline (gabbro, dolerites, and diorites) with sparse tholeiites (few gabbro). The basic rocks are made up of calcic plagioclase (An_{49-54}), clinopyroxene, olivine (altered), nepheline, and opaques, while the intermediate rocks …
Tectonosedimentary Evolution Of The Karacasu And Bozdoğan Basins In The Central Menderes Massif, W Anatolia, Faruk Ocakoğlu, Sanem Açikalin, Erman Özsayin, Ramazan Kadi̇r Di̇ri̇k
Tectonosedimentary Evolution Of The Karacasu And Bozdoğan Basins In The Central Menderes Massif, W Anatolia, Faruk Ocakoğlu, Sanem Açikalin, Erman Özsayin, Ramazan Kadi̇r Di̇ri̇k
Turkish Journal of Earth Sciences
The Karacasu and Bozdoğan basins, which trend obliquely to modern grabens in the Central Menderes Massif, are investigated in terms of morphology, basinfill architecture, and structure. Evaluation of the previous geophysical and new structural data indicates that the basins are symmetrical grabens mostly running in a N-S direction. Analysis of sedimentary facies of the basins infill supports the simple graben model by revealing lateral alluvial/colluvial fans in basin margins and axial fluvial/lacustrine environments in a central trough. The long-term changes between fluvial and lacustrine conditions in the basins are attributed to paleoclimatic origin. Paleostress analysis of slickensides substantiates that the …
Probabilistic Earthquake Hazard Assessment For Ankara And Its Environs, Bülent Özmen, Berna Burçak Başbuğ Erkan
Probabilistic Earthquake Hazard Assessment For Ankara And Its Environs, Bülent Özmen, Berna Burçak Başbuğ Erkan
Turkish Journal of Earth Sciences
The capital and the second largest city of Turkey, Ankara, is generally considered to be safe in terms of seismic activities and earthquake hazard. However, recent studies and earthquakes experienced in the region showed that Ankara is not indeed seismically safe. As the number of studies on Ankaras seismic hazard increases, the number of scientists who claim that the earthquake hazard in Ankara is higher than expected also increases. However, to date no detailed analysis has been undertaken as to the earthquake hazard facing Ankara. This study has compiled data from the earthquake catalogues available in Turkey and employed the …
A Microscopic Approach To The Pedogenic Formation Of Palygorskite Associated With Quaternary Calcretes Of The Adana Area, Southern Turkey, Meryem Yeşi̇lot Kaplan, Muhsi̇n Eren, Selahatti̇n Kadi̇r, Seli̇m Kapur, Jennifer Huggett
A Microscopic Approach To The Pedogenic Formation Of Palygorskite Associated With Quaternary Calcretes Of The Adana Area, Southern Turkey, Meryem Yeşi̇lot Kaplan, Muhsi̇n Eren, Selahatti̇n Kadi̇r, Seli̇m Kapur, Jennifer Huggett
Turkish Journal of Earth Sciences
Quaternary calcretes in the Adana area (southern Turkey) are widespread and occur in a variety of forms such as nodular, columnar/tubular, fracture-infill, laminated hardpan, and conglomeratic crusts. Palygorskite associated with calcrete nodules, tubes, and fracture-infills in the columnar horizon and adjacent host-rock mudstones suggests a cogenetic formation. The Beta-fabric (biogenic) constituents and stable isotope values of calcretes support a pedogenic origin for calcretes and also palygorskite. Extensions of palygorskite fibre and fibre bundles from euhedral to subhedral calcite crystals in calcretes and from smectite flakes in adjacent host-rock mudstone suggest an authigenic origin related to calcretisation in which precipitation and …
Alteration Mineral Mapping With Aster Data By Integration Of Coded Spectral Ratio Imaging And Som Neural Network Model, Mohammad Hassan Tayebi, Majid Hashemi Tangestani, Robert Keller Vincent
Alteration Mineral Mapping With Aster Data By Integration Of Coded Spectral Ratio Imaging And Som Neural Network Model, Mohammad Hassan Tayebi, Majid Hashemi Tangestani, Robert Keller Vincent
Turkish Journal of Earth Sciences
This study applied coded spectral ratio imaging and a self-organizing map (SOM) neural network model for subpixel classification of Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) data to map alteration minerals of the Masahim volcano, SE Iran. Spectra of samples were measured using a FieldSpec spectroradiometer, and were interpreted for finding key alteration minerals. Key minerals including sericite and kaolinite were selected. Thirty-six nonreciprocal spectral ratios of 9 ASTER reflective bands were created. Each spectral parameter (of 9 spectral bands and 36 spectral ratios) for the field and library mineral spectra was divided into deciles. Each decile of spectral …
Geochemistry Of Sands Along The San Nicolás And San Carlos Beaches, Gulf Of California, Mexico: Implications For Provenance And Tectonic Setting, John Selvamony Armstrong Altrin, Ramasamy Nagarajan, Yong Il Lee, Juan José Kasper Zubillaga, Leslie Patricia Córdoba Saldaña
Geochemistry Of Sands Along The San Nicolás And San Carlos Beaches, Gulf Of California, Mexico: Implications For Provenance And Tectonic Setting, John Selvamony Armstrong Altrin, Ramasamy Nagarajan, Yong Il Lee, Juan José Kasper Zubillaga, Leslie Patricia Córdoba Saldaña
Turkish Journal of Earth Sciences
The weathering conditions, provenance, and tectonic setting of sands from the San Nicolás (SN) and San Carlos (SC) beaches along the Gulf of California, Mexico, have been studied using mineralogy, major element, and trace element data. The compositional similarity among 4 independent groups (each beach area consists of 2 grain-size groups, i.e. medium- and fine-grained sands) was tested statistically by the application of analysis of variance at the 99% confidence level to avoid misinterpretation. The X-ray diffraction and SEM-EDS data revealed that the fine-grained SN sands were abundant in rutile and zircon minerals. The higher SiO_2/Al_2O_3 ratio of the SN …
Carbonate Sealing And Its Controlling Factors: Cap Rock And Inner Barrier Layers Of Yingshan Formation On Tazhong Northern Slope, Tarim Basin, Xiaodong Lan, Xiuxiang Lu
Carbonate Sealing And Its Controlling Factors: Cap Rock And Inner Barrier Layers Of Yingshan Formation On Tazhong Northern Slope, Tarim Basin, Xiaodong Lan, Xiuxiang Lu
Turkish Journal of Earth Sciences
The Yingshan Formation, located on the Tazhong Northern Slope, contains oil- and gas-rich layers with the reserves of about 700 × 10^6 TOE. The high-resistivity inner layers isolate the hydrocarbon bearing zones and form the sequential sets of reservoir bed-seal assemblages in a vertical direction within the Yingshan Formation, which is directly bound above by a micritic carbonate cap rock that is overlain by the 3rd to 5th members of the Lianglitag Formation. The sealing capability of the cap rock and inner barrier layers was evaluated macroscopically and microscopically in terms of the core breakthrough pressure and thin-section identification. The …
Bramatherium (Artiodactyla, Ruminantia, Giraffidae) From The Middle Siwaliks Of Hasnot, Pakistan: Biostratigraphy And Palaeoecology, Muhammad Akbar Khan, Muhammad Akhtar, Ammara Irum
Bramatherium (Artiodactyla, Ruminantia, Giraffidae) From The Middle Siwaliks Of Hasnot, Pakistan: Biostratigraphy And Palaeoecology, Muhammad Akbar Khan, Muhammad Akhtar, Ammara Irum
Turkish Journal of Earth Sciences
We describe here new remains of the giraffid Bramatherium, from the late Miocene-early Pliocene of Hasnot, northern Pakistan. The fossil giraffid material from Hasnot represents 2 taxa of Bramatherium, B. megacephalum and B. grande. The Hasnot locality is characterised by high proportions of ruminants, namely Boselaphini, Antilopini, Sivatheriinae, Cervini, Dorcatherium, and Dorcabune. The Hasnot fossil ruminant assemblage is fairly typical for the Siwalik province and comparisons with the Greco-Iranian-Afghan and African palaeobiological provinces indicate a late Miocene-early Pliocene age. It is suggested that local Hasnot palaeoenvironments comprised wetlands to woodland biomes, perhaps devoid of expansive dense forests.
Appraisal Of Active Tectonics Using Dem-Based Hypsometric Integral And Trend Surface Analysis In Emilia-Romagna Apennines, Northern Italy, Saima Siddiqui, Mauro Soldati
Appraisal Of Active Tectonics Using Dem-Based Hypsometric Integral And Trend Surface Analysis In Emilia-Romagna Apennines, Northern Italy, Saima Siddiqui, Mauro Soldati
Turkish Journal of Earth Sciences
The hypsometric integral (HI) has generally been used to explain the stages of landscape evolution and erosional processes. It is an important tool to investigate tectonics and lithologic and climatic effects on topographic change. We analyzed the significance of the HI to investigate active tectonics in the Emilia-Romagna Apennines of northern Italy. We used a digital elevation model of 5-m spatial resolution to calculate grid-based HI values. The HI distribution does not show clear spatial patterns of high and low HI values. However, when statistical methods of local indices of spatial autocorrelation were applied, it was possible to identify clear …
Investigation Of Fault-Related Small-Scale Fluid Flow In Geothermal Fields By Numerical Modeling, Doğa Doğan
Investigation Of Fault-Related Small-Scale Fluid Flow In Geothermal Fields By Numerical Modeling, Doğa Doğan
Turkish Journal of Earth Sciences
In this paper, hydrothermal circulations and temperature distributions in geothermal areas with fault zones are investigated. It is shown that existence of the fault zones influences both the fluid circulation patterns and velocities. Reciprocal influence of the local fluid circulations and the temperature distribution is demonstrated. A 2-dimensional square porous layer is used for modeling the geothermal field. Faults are modeled as vertical porous layers. It is assumed that faults are located inside the geothermal field and have a higher permeability than the field itself. Anisotropic and isotropic models are used to simulate the permeability structure of the faults. Several …
Colour Origin Of Red Sandstone Beds Within The Hüdai Formation (Early Cambrian), Aydıncık (Mersin), Southern Turkey, Muhsi̇n Eren, Selahatti̇n Kadi̇r
Colour Origin Of Red Sandstone Beds Within The Hüdai Formation (Early Cambrian), Aydıncık (Mersin), Southern Turkey, Muhsi̇n Eren, Selahatti̇n Kadi̇r
Turkish Journal of Earth Sciences
The basal part of the Hüdai Formation (Early Cambrian) in the Aydıncık (Mersin) area comprises red sandstone beds at different stratigraphic levels, showing ripple cross-lamination. These beds were deposited in the middle to lower part of an intertidal flat environment. Bedding-parallel reddening and its cyclic character suggest syn-sedimentary or early diagenetic red colouration in a marine environment. Both X-ray diffraction and petrographic analyses indicate that the red sandstones are composed of predominantly K-feldspar and quartz grains and an illite matrix. These are dominantly arkosic wacke. A small amount of hematite (
Low-Sulfidation Epithermal Au-Ag Mineralization In The Sındırgı District, Balıkesir Province, Turkey, Hüseyi̇n Yilmaz, Fatma Nuran Sönmez, Erhan Akay, Ahmet Keri̇m Şener, Seda Tufan
Low-Sulfidation Epithermal Au-Ag Mineralization In The Sındırgı District, Balıkesir Province, Turkey, Hüseyi̇n Yilmaz, Fatma Nuran Sönmez, Erhan Akay, Ahmet Keri̇m Şener, Seda Tufan
Turkish Journal of Earth Sciences
The Sındırgı District (Balıkesir, western Turkey) lies within the Western Anatolian volcanic and extensional province, adjacent to the WNW-trending Simav graben, approximately 130 km NE of İzmir. The Sındırgı mining district is underlain mainly by Miocene volcanic rocks and hosts several low-sulfidation epithermal Au-Ag deposits and prospects located near the towns of Sındırgı and Bigadiç. The Kızıltepe low-sulfidation epithermal gold-silver deposit is located southeast of Yusufçam village (Sındırgı, Balıkesir), and other prospects, including the Kepez, Kavaklıdüz, and Karadüz prospects, are located northeast of Kızıltepe. Potentially economic grades occur at Kızıltepe, which contains a measured and indicated resource of 1.754.790 Mt …
A Method Based On The Van Der Hoven Spectrum For Performance Evaluation In Prediction Of Wind Speed, Eli̇f Kaya, Burak Barutçu, Şükran Si̇bel Menteş
A Method Based On The Van Der Hoven Spectrum For Performance Evaluation In Prediction Of Wind Speed, Eli̇f Kaya, Burak Barutçu, Şükran Si̇bel Menteş
Turkish Journal of Earth Sciences
Development of techniques for accurate assessment of wind power potential at a site is very important for the planning and establishment of a wind energy system. The most important defining character of the wind and the problems related with it lie in its unpredictable variation. Van der Hoven constructed a wind speed spectrum using short-term and long-term records of wind in Brookhaven, NY, USA, in 1957 and showed the diurnal and turbulent effects. His spectrum suggests that there is a substantial amount of wind energy in 1-min periodic variations. The aim of this paper is to evaluate the results of …
Plio-Quaternary Extensional Tectonics Of The Central Anatolian Plateau: A Case Study From The Tuz Gölü Basin, Turkey, Erman Özsayin, Tahsi̇n Atti̇la Çi̇ner, Fuat Bora Rojay, Ramazan Kadi̇r Di̇ri̇k, Daniel Melnick, David Fernández-Blanco, Giovanni Bertotti, Taylor F. Schildgen, Yannick Garcin, Manfred R. Strecker, Masafumi Sudo
Plio-Quaternary Extensional Tectonics Of The Central Anatolian Plateau: A Case Study From The Tuz Gölü Basin, Turkey, Erman Özsayin, Tahsi̇n Atti̇la Çi̇ner, Fuat Bora Rojay, Ramazan Kadi̇r Di̇ri̇k, Daniel Melnick, David Fernández-Blanco, Giovanni Bertotti, Taylor F. Schildgen, Yannick Garcin, Manfred R. Strecker, Masafumi Sudo
Turkish Journal of Earth Sciences
The Tuz Gölü Basin is the largest sedimentary depression located at the center of the Central Anatolian Plateau, an extensive, low-relief region with elevations of ca. 1 km located between the Pontide and Tauride mountains. Presently, the basin morphology and sedimentation processes are mainly controlled by the extensional Tuz Gölü Fault Zone in the east and the transtensional İnönü-Eskişehir Fault System in the west. The purpose of this study is to contribute to the understanding of the Plio-Quaternary deformation history and to refine the timing of the latest extensional phase of the Tuz Gölü Basin. Field observations, kinematic analyses, interpretations …
Messinian Forced Regressions In The Adana Basin: A Near-Coincidence Of Tectonic And Eustatic Forcing, Ayhan Ilgar, Wojciech Nemec, Aynur Hakyemez, Erhan Karakuş
Messinian Forced Regressions In The Adana Basin: A Near-Coincidence Of Tectonic And Eustatic Forcing, Ayhan Ilgar, Wojciech Nemec, Aynur Hakyemez, Erhan Karakuş
Turkish Journal of Earth Sciences
This sedimentological and sequence-stratigraphic study focuses on the late Miocene deposits in one of the largest peri-Mediterranean basins of southern Turkey, the Adana Basin, which formed as a Tauride foreland depression accumulating molasse deposits. The Tortonian-Messinian shallow-marine Handere Formation, previously interpreted as a regressive succession, appears to have recorded several relative sea-level changes. The formation base recorded a forced regression attributed to the end-Serravalian (Tor-1) eustatic fall in sea level. The lower to middle part of the formation is transgressive, culminating in offshore mudstones. The upper part is regressive and its 3 isolated conglomeratic members represent sharp-based Gilbert-type deltas with …
On The Surface Circulation Of The Marmara Sea As Deduced From Drifters, Riccardo Gerin, Pierre-Marie Poulain, Şükrü Turan Beşi̇ktepe, Pietro Zanasca
On The Surface Circulation Of The Marmara Sea As Deduced From Drifters, Riccardo Gerin, Pierre-Marie Poulain, Şükrü Turan Beşi̇ktepe, Pietro Zanasca
Turkish Journal of Earth Sciences
The surface circulation of the Marmara Sea was studied with satellite-tracked drifters during 2 field experiments. A total of 29 drifters were released in September 2008 and February 2009 at key locations south of the Bosphorus and in the central part of the sea. The spatial structures and temporal variability are described together with the atmospheric conditions of the Marmara Sea during the period of study. The behavior of drifters with respect to the wind was qualitatively analyzed. The pseudo-Eulerian velocity statistics were computed from the interpolated positions and maps of the mean currents were produced using the data sorted …
Occurrences Of Rock-Fulgurites Associated With Steel Pylons Of The Overhead Electric Transmission Line At Tor Zawar, Ziarat District And Jang Tor Ghar, Muslim Bagh, Pakistan, Akhtar Muhammad Kassi, Aimal Khan Kasi, Henrik Friis, Din Muhammad Kakar
Occurrences Of Rock-Fulgurites Associated With Steel Pylons Of The Overhead Electric Transmission Line At Tor Zawar, Ziarat District And Jang Tor Ghar, Muslim Bagh, Pakistan, Akhtar Muhammad Kassi, Aimal Khan Kasi, Henrik Friis, Din Muhammad Kakar
Turkish Journal of Earth Sciences
We here report 3 occurrences of rock fulgurites: 2 at Tor Zawar, Ziarat District, and 1 at Jang Tor Ghar, Muslim Bagh, Pakistan. The first and second melting events occurred at Tor Zawar, Ziarat on 27 January 2010, and sometime during the month of January 2011; the third melting event occurred on 12 February 2011. All these events occurred near the base of steel pylons of electric transmission lines installed on hillside outcrops, which transmitted atmospheric lightning to the outcrop. At Tor Zawar, Ziarat District, the pylons are installed on outcrops of the volcanogenic conglomerate of the Late Cretaceous Bibai …
Investigation Of The Groundwater Effect On Slow-Motion Landslides By Using Dynamic Kalman Filtering Method With Gps: Koyulhisar Town Center, Kemal Özgür Hastaoğlu
Investigation Of The Groundwater Effect On Slow-Motion Landslides By Using Dynamic Kalman Filtering Method With Gps: Koyulhisar Town Center, Kemal Özgür Hastaoğlu
Turkish Journal of Earth Sciences
The monitoring and analysis of natural disasters and their systems is crucially important in minimizing loss of life and property. In recent years, various methods of measurement and analysis have been employed to monitor and analyze landslides and their mechanisms. The Global Positioning System (GPS) is one of the methods used to monitor landslides. The consideration of external forces causing movement is essential when interpreting movement obtained by GPS. This paper describes a large motion in the Koyulhisar town center obtained from one GPS point. Twelve GPS points were set up in the Koyulhisar landslide region; 6 periods of GPS …