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- Turkey (5)
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Articles 1 - 30 of 47
Full-Text Articles in Physical Sciences and Mathematics
Geochronological And Geochemical Constraints And Origin Of The Tavşanlı Zoneplutonic Rocks (Nw Turkey), Meti̇n Bağci, Mehmet Demi̇rbi̇lek, Nurdane İlbeyli̇, Ahmet Yildiz, Yaşar Ki̇bi̇ci̇
Geochronological And Geochemical Constraints And Origin Of The Tavşanlı Zoneplutonic Rocks (Nw Turkey), Meti̇n Bağci, Mehmet Demi̇rbi̇lek, Nurdane İlbeyli̇, Ahmet Yildiz, Yaşar Ki̇bi̇ci̇
Turkish Journal of Earth Sciences
In the Tavşanlı Zone, the Eocene magmatism led to NW-SE trending plutons located just south of the İzmir-Ankara-Erzincan Suture Zone in Turkey. The Middle Eocene-aged Günyüzü Intrusive Complex (Karacaören, Tekören, Dinek, Kadıncık) is one of these plutonic rocks and has metaluminous to peraluminous, medium-K calc-alkaline to shoshonitic and mainly I-type granite characteristics. The plutonic rocks consist of mainly granodiorite and granite, and their mafic microgranular enclaves are widespread in these rocks. Mineral assemblages in the host rocks and enclaves also are quite similar (quartz, plagioclase, K-feldspar, biotite, and hornblende), but the latter are more enriched in mafic minerals. The enclaves …
Zircon U-Pb Geochronology, Geochemistry, Sr-Nd Isotopic Compositions, And Tectonomagmatic Implications Of Nay (Ne Iran) Postcollisional Intrusives In The Sabzevar Zone, Alireza Almasi, Mohammad Hassan Karimpour, Reza Arjmandzadeh, José Francisco Santos, Khosrow Ebrahimi Nasrabadi
Zircon U-Pb Geochronology, Geochemistry, Sr-Nd Isotopic Compositions, And Tectonomagmatic Implications Of Nay (Ne Iran) Postcollisional Intrusives In The Sabzevar Zone, Alireza Almasi, Mohammad Hassan Karimpour, Reza Arjmandzadeh, José Francisco Santos, Khosrow Ebrahimi Nasrabadi
Turkish Journal of Earth Sciences
The mafic to felsic intrusive rocks of Nay (IRN) are located in the northeast of the central Iranian block. In this study, we present new major and trace element geochemistry, U-Pb zircon ages, and Sr-Nd isotopic data to discuss the origin of the IRN postcollisional units. The oldest units in the Nay area belong to Paleocene?early Eocene volcanic and pyroclastic series including basalt-andesite, latite, dacite, and tuff. These series are crosscut by subvolcanic and granitoid rocks with lithological composition varying from quartz gabbro to K-feldspar granite. The youngest igneous activity is represented by quartz monzodiorite dikes. Hornblende-biotite quartz monzonite from …
Givetian/Frasnian (Middle/Upper Devonian) Transition In The Eastern Taurides, Turkey, Recep Özkan, Ati̇ke Nazi̇k, Axel Munnecke, Di̇lek Gülnur Demi̇ray, Eberhard Schindler, Tuba Aydin Özbek, Emi̇ne Şeker Zor, İsak Yilmaz, Rainer Brocke, Recep Hayretti̇n Sancay, Volker Wilde, Mehmet Namik Yalçin
Givetian/Frasnian (Middle/Upper Devonian) Transition In The Eastern Taurides, Turkey, Recep Özkan, Ati̇ke Nazi̇k, Axel Munnecke, Di̇lek Gülnur Demi̇ray, Eberhard Schindler, Tuba Aydin Özbek, Emi̇ne Şeker Zor, İsak Yilmaz, Rainer Brocke, Recep Hayretti̇n Sancay, Volker Wilde, Mehmet Namik Yalçin
Turkish Journal of Earth Sciences
Devonian strata, including siliciclastic and carbonate rocks that were deposited in shallow marine to coastal environments, are widely distributed in the eastern Taurides of southern Turkey. To document the regional formation of the Givetian (Middle Devonian)/ Frasnian (Upper Devonian) boundary, a section in the eastern Taurides was studied in high resolution with regard to biostratigraphy, microfacies, sequence stratigraphy, and the global Frasne Event. The integrated biostratigraphic investigation was based on calcareous benthic foraminifers, ostracods, conodonts, and palynomorphs, which provide a biostratigraphic frame that allows to recognize the Givetian/Frasnian boundary. On the basis of the lithological variation in the outcrop as …
New Fossil Wood Descriptions From The Pliocene Of Central Anatolia And The Presence Of Taxodioxylon In Turkey From The Oligocene To Pliocene, Ünal Akkemi̇k
Turkish Journal of Earth Sciences
Recent paleobotanical studies on petrified woods revealed valuable information about the Miocene-period trees of Turkey. The purpose of this study is to present new descriptions from the Pliocene of central Anatolia. The materials were collected from a new fossil site of Pliocene age in the village of Yıprak (Çerkeş, Çankırı, Turkey) in central northern Turkey. With this study, a new fossil genus, Cercioxylon Ü. Akkemik, related to modern Cercis L., and a new fossil species of Cupressinoxylon were described, and a long presence of taxodioid type trees from the late Oligocene to Pliocene of Turkey were discussed. The wood composition …
Petrological Characteristics Of The Middle Eocene Toveireh Pluton (Southwest Of Jandaq, Central Iran): Implications For The Eastern Branch Of The Neo-Tethys Subduction, Masumeh Sargazi, Ghodrat Torabi, Tomoaki Morishita
Petrological Characteristics Of The Middle Eocene Toveireh Pluton (Southwest Of Jandaq, Central Iran): Implications For The Eastern Branch Of The Neo-Tethys Subduction, Masumeh Sargazi, Ghodrat Torabi, Tomoaki Morishita
Turkish Journal of Earth Sciences
The Middle Eocene Toveireh plutonic body is located in the western margin of the Central-East Iranian Microcontinent (CEIM). This plutonic body consists of granodiorite, syenogranite, and monzogranite compositions. Granodiorite is the most predominant rock unit, which is composed of quartz, plagioclase, K-feldspar, hornblende, and biotite main mineral phases. The Toveireh pluton is metaluminous to weakly peraluminous (A/CNK = 0.85-1.04) and shows a calc-alkaline I-type affinity. Primitive mantle-normalized spidergrams show enrichment of large ion lithophile elements (Rb, Ba, Th, U) and light rare earth elements (REEs) (La/YbN = 6.8-8.24), as well as depletion of high-field strength elements (Nb, Ta, Ti, P). …
Small Benthic Foraminiferal Biostratigraphy And Palaeoecology During The Campanian-Maastrichtian Transition In North-Western Tunisia, Abdellatif Bejaoui, Ezzedine Saïdi, Dalila Zaghbib-Turki
Small Benthic Foraminiferal Biostratigraphy And Palaeoecology During The Campanian-Maastrichtian Transition In North-Western Tunisia, Abdellatif Bejaoui, Ezzedine Saïdi, Dalila Zaghbib-Turki
Turkish Journal of Earth Sciences
Campanian-Maastrichtian (C-M) sediments in the Kalâat Senan area (north-western Tunisia) include rich microfauna. Small benthic foraminifera (SBF) analysis at the Wadi Necham (ON) section reveals significant biostratigraphic and palaeoecological changes during the C-M transition. A progressive evolutionary trend within the Bolivinoides lineage allowed us to establish the late Campanian B. decoratus Interval Range Zone (IRZ) and two successive zones in the early Maastrichtian, namely the B. miliaris IRZ and the B. draco Total Range Zone (TRZ), which span the standard planktonic foraminifera Gansserina gansseri IRZ. Foraminiferal semiquantitative data from the C-M transition interval at the studied section yield high values …
Deep Structure Of Central Menderes Massif: Data From Deep Geothermal Wells, Fatma Gülmez, Emre Damci, Umut Bariş Ülgen, Aral Okay
Deep Structure Of Central Menderes Massif: Data From Deep Geothermal Wells, Fatma Gülmez, Emre Damci, Umut Bariş Ülgen, Aral Okay
Turkish Journal of Earth Sciences
The Menderes Massif is a major Alpide metamorphic complex in western Turkey; it is subdivided into southern, central, and northern submassifs by the east-west trending grabens. The basement of the southern Menderes Massif consists of Neoproterozoic micaschists (Selimiye Formation) intruded by Neoproterozoic granites. The basement is overlain by Permo-Carboniferous phyllite, marble, and quartzite (Göktepe Formation), which pass up into a thick sequence of Mesozoic marbles with emery horizons (Milas Marble). The marbles are overlain by latest Cretaceous recrystallized pelagic limestone and Paleocene metaclastics, which are thrusted over by the Lycian nappes. The metamorphism and deformation of the Phanerozoic sequence of …
Estimating The Location Of A Causative Body From A Self-Potential Anomaly Using 2d And3d Normalized Full Gradient And Euler Deconvolution, Petek Sindirgi, Şenol Özyalin
Estimating The Location Of A Causative Body From A Self-Potential Anomaly Using 2d And3d Normalized Full Gradient And Euler Deconvolution, Petek Sindirgi, Şenol Özyalin
Turkish Journal of Earth Sciences
Changes in the size and depth of sources greatly affect self-potential (SP) anomalies. Therefore, it is important to determine the location of the source accurately. In the present study, applications of the normalized full gradient (NFG) method and Euler deconvolution (EUD) were described to determine the location of the sphere-like SP body as complementary approaches to other optimization algorithms. The NFG and EUD methods were tested on synthetic, noise-free, and noisy anomalies caused by sphere-like models in two-dimensional (2D) and three-dimensional (3D) cases. Subsequently, the methods were applied to real field data. The importance of the present study lies in …
Structural Evolution Of The Eastern Anatolian Basins: An Example From Collisional To Postcollisional Tectonic Processes, Turkey, Ali̇ Yilmaz, Hüseyi̇n Yilmaz
Structural Evolution Of The Eastern Anatolian Basins: An Example From Collisional To Postcollisional Tectonic Processes, Turkey, Ali̇ Yilmaz, Hüseyi̇n Yilmaz
Turkish Journal of Earth Sciences
The Eastern Anatolian Basins (EABs) started to develop on a mosaic, made up of forearc deposits of the Eastern Pontide Arc (EPA), continental metamorphic rocks of the Anatolian-Iranian Platform (AIP), and obducted ophiolitic units of the North Anatolian Ophiolitic Belt (NAOB) and Southeastern Anatolian Ophiolitic Belt (SAOB). The basement rocks of the East Anatolian Region represent a continental fragment positioned between the EPA to the north and the Arabian Platform to the south. In appearance, it can be said that there are many different basins in the Eastern Anatolian Region. This paper reports on three of them that were studied …
Mineralogy And Geochemistry Of Feed Coals And Combustion Residues Of The Kangal Power Plant (Sivas, Turkey), Ali̇ İhsan Karayi̇ği̇t, Riza Görkem Oskay, Rod A. Gayer
Mineralogy And Geochemistry Of Feed Coals And Combustion Residues Of The Kangal Power Plant (Sivas, Turkey), Ali̇ İhsan Karayi̇ği̇t, Riza Görkem Oskay, Rod A. Gayer
Turkish Journal of Earth Sciences
This study focuses on mineralogical and geochemical compositions of feed coal (FC) and combustion residues, namely fly ash (FA) and bottom ash (BA) samples, obtained from the Kangal coal-fired power plant in central Turkey. The X-ray powder diffraction data indicate that carbonate and clay minerals are dominant phases in the FC samples. In the FA samples, quartz, hematite, anhydrite, lime, and feldspar are generally dominant and abundant phases, whereas calcite, ettringite, and portlandite are generally more abundant in the BA samples. The elements Mo, Cs, and U are significantly enriched in the studied FC, FA, and BA samples. The statistical …
Upper Cretaceous Volcaniclastic Complexes And Calcareous Plankton Biostratigraphy Inthe Western Pontides, Nw Turkey, Katharina Boehm, Michael Wagreich, Erik Wolfgring, Okan Tüysüz, Susanne Gier, İsmai̇l Ömer Yilmaz
Upper Cretaceous Volcaniclastic Complexes And Calcareous Plankton Biostratigraphy Inthe Western Pontides, Nw Turkey, Katharina Boehm, Michael Wagreich, Erik Wolfgring, Okan Tüysüz, Susanne Gier, İsmai̇l Ömer Yilmaz
Turkish Journal of Earth Sciences
This study describes and interprets Upper Cretaceous volcaniclastics interbedded with hemipelagic to pelagic limestones, marls, and turbidites from the Western Pontides, northwestern Turkey. The Dereköy Formation, the Unaz Formation (red pelagic limestone unit), and the Cambu Formation can be distinguished, overlain by the turbiditic Akveren Formation. Biostratigraphic ages from the predominantly volcaniclastic Dereköy Formation indicate Turonian (Dicarinella concavata planktonic foraminifera zone, CC13/UC8-9 nannofossil zones) to middle/late Santonian ages up to CC17/UC13. The Unaz Formation, deposited during the late Santonian (UC13, Dicarinella asymetrica Zone), is overlain by the volcaniclastic Cambu Formation of latest Santonian (CC17b/UC13) to early/middle Campanian (CC20/UC15a) age. However, …
U-Pb Zircon Geochronology, Geochemistry, And Petrogenesis Of The Hamech Intrusions In The Kuh-E-Shah Volcano-Plutonic Complex, Eastern Iran, Abbas Etemadi, Mohammad Hassan Karimpour, Azadeh Malekzadeh Shafaroudi, José Francisco Santos, Ryan Mathur, Sara Ribeiro
U-Pb Zircon Geochronology, Geochemistry, And Petrogenesis Of The Hamech Intrusions In The Kuh-E-Shah Volcano-Plutonic Complex, Eastern Iran, Abbas Etemadi, Mohammad Hassan Karimpour, Azadeh Malekzadeh Shafaroudi, José Francisco Santos, Ryan Mathur, Sara Ribeiro
Turkish Journal of Earth Sciences
The Hamech area is located in the west of Kuh-e-Shah volcano-plutonic complex, close to the boundary between the Lut Block and Sistan Suture Zone (SSZ), and is composed of monzonite to diorite porphyries and rare gabbro that intruded into older volcanic rocks. U-Pb zircon dating indicates an age of 36.9 ± 1 Ma for gabbro (Late Eocene, Priabonian) and 38.6 ± 0.5 Ma for dacite (Late Eocene, Bartonian). Geochemically, the studied intrusions are dominantly I-type, high-K calc-alkaline, and metaluminous features. Primitive mantle-normalized trace-element spider diagrams of these rocks present enrichment in ion lithophile elements such as Cs, Rb, Ba, K, …
Petrology, Geothermobarometry, And P-T Path Of Spinel-Bearing Symplectite Migmatitesfrom The Simin Area, Hamedan, Sanandaj-Sirjan Zone, Iran, Ali Akbar Baharifar, Donna L. Whitney, Kwan-Nang Pang, Sun-Lin Chung, Yoshiyuki Iizuka
Petrology, Geothermobarometry, And P-T Path Of Spinel-Bearing Symplectite Migmatitesfrom The Simin Area, Hamedan, Sanandaj-Sirjan Zone, Iran, Ali Akbar Baharifar, Donna L. Whitney, Kwan-Nang Pang, Sun-Lin Chung, Yoshiyuki Iizuka
Turkish Journal of Earth Sciences
Migmatitic rocks in the Hamedan area, Sanandaj-Sirjan Zone, Iran, contain symplectite that has partially replaced andalusite. In metatexite, symplectite typically consists of spinel + cordierite + Ca-rich plagioclase ± orthoamphibole, but in diatexite, symplectite consists of spinel + Ca-rich plagioclase; cordierite is typically absent from symplectite although it is present in the matrix of the rock. A calculated P-T pseudosection for an average, nonmigmatitic bulk-rock composition indicates that the whole-rock composition was not the effective bulk composition during the formation of symplectite. Therefore, effective bulk compositions (EBCs) were calculated using modal abundance and the average composition of minerals in contact …
Microborings As Indication Of Cryptic Life Modes In The Foraminifer Orbitoides:Maastrichtian Sediments Of The Haymana And Nallıhan Districts (Ankara, Turkey), Muhi̇tti̇n Görmüş, Huri̇ye Demi̇rcan, Yusuf Kağan Kadioğlu, Fuzuli̇ Yağmurlu, Muhammed Sami̇ Us
Microborings As Indication Of Cryptic Life Modes In The Foraminifer Orbitoides:Maastrichtian Sediments Of The Haymana And Nallıhan Districts (Ankara, Turkey), Muhi̇tti̇n Görmüş, Huri̇ye Demi̇rcan, Yusuf Kağan Kadioğlu, Fuzuli̇ Yağmurlu, Muhammed Sami̇ Us
Turkish Journal of Earth Sciences
Widespread Maastrichtian siliciclastics and carbonates cropping out in the Haymana (S Ankara) and Nallıhan (NW Ankara) districts in the northwest and central Anatolia basins include rich Orbitoides occurrences. Microborings in the Orbitoides tests are interesting to notify. In this study, the details of their morphologic structures were investigated. Microborings were analyzed in more than 650 equatorial thin sections of the Orbitoides tests and 100 hard rock thin sections. The abundance of microborings increases in the siliciclastics towards the Cretaceous/Palaeogene boundary (K/Pg). They were identified as Maeandropolydora osmaneliensis Nielsen and Görmüş, Maeandropolydora isp. Curvichnus semorbis Nielsen, Oichnus simplex Bromley, Oichnus isp. …
Mineralogy And Geochemistry Of Metalliferous Sedimentary Rocks From The Uppercretaceous Vms Deposits Of The Eastern Pontides (Ne Turkey), Mustafa Kemal Revan, Yurdal Genç, Okan Deli̇baş, Valeri̇y V. Maslennikov, Nuri̇ya R. Ayupova, Okan Zi̇mi̇toğlu
Mineralogy And Geochemistry Of Metalliferous Sedimentary Rocks From The Uppercretaceous Vms Deposits Of The Eastern Pontides (Ne Turkey), Mustafa Kemal Revan, Yurdal Genç, Okan Deli̇baş, Valeri̇y V. Maslennikov, Nuri̇ya R. Ayupova, Okan Zi̇mi̇toğlu
Turkish Journal of Earth Sciences
Metalliferous sedimentary rocks, despite being limited in scope, are important stratigraphic horizons within the volcanogenic massive sulfide (VMS) deposits in the Upper Cretaceous volcanic belt of the Eastern Pontides. The metalliferous sedimentary rocks compose a distinctive genetic class. The abundance of such rocks in the Eastern Pontide district provides a basis for study and description that may be more widely applied in other VMS districts. The metalliferous sedimentary rocks generally form layers less than 1.5 m thick above stratiform massive sulfide ores. The metalliferous sediments are largely composed of quartz and hematite. While the Si ± Fe content of sediments …
Late Quaternary Landscape Evolution Of The Southern Marmara Region:Paleogeographic Implications For Settlements, Nw Turkey, Ni̇zametti̇n Kazanci, Zeynep Ergun, Kaan İren, Suzanne A. Leroy, Sonay Boyraz Aslan, Mehmet Sali̇m Öncel, Koray Koç, Alper Gürbüz
Late Quaternary Landscape Evolution Of The Southern Marmara Region:Paleogeographic Implications For Settlements, Nw Turkey, Ni̇zametti̇n Kazanci, Zeynep Ergun, Kaan İren, Suzanne A. Leroy, Sonay Boyraz Aslan, Mehmet Sali̇m Öncel, Koray Koç, Alper Gürbüz
Turkish Journal of Earth Sciences
This study presents the late Quaternary evolution of the southern Marmara region in northwestern Turkey and discusses the suitability of the area for settlements. It is based on interpretation of sediment analyses together with radiometric dates obtained from drilling cores. As three-fourths of the southern Marmara region (ca. 30,000 km2) is covered by the Susurluk Drainage Basin (SDB), the study focuses on this basin. The SDB has a concave surface morphology dipping northward, with highlands in the south (ca. 1300-1700 m a.s.l.) and lowlands in the north (ca. 0-250 a.s.l.). Lake Manyas, Lake Ulubat, and south-north flowing rivers, together with …
Interpretation Of Sea Level Change Using Paleobiodiversity Analysis: The Darende Formation Of The Eocene (Malatya Basin, East Turkey), Si̇bel Kayğili, Ercan Aksoy
Interpretation Of Sea Level Change Using Paleobiodiversity Analysis: The Darende Formation Of The Eocene (Malatya Basin, East Turkey), Si̇bel Kayğili, Ercan Aksoy
Turkish Journal of Earth Sciences
This study was conducted in the Paleogene-Neogene Malatya Basin situated in Eastern Anatolia with particular focus on the analyses of the paleobiodiversity of the larger benthic foraminifera assemblage found in the late Lutetian-Bartonian Yenice and Asartepe members of the Darende Formation. Frequency, dominance, similarity analyses, population size, and diversity indices of the genera/species were obtained for the first time from the analyses of the paleobiodiversity data interpretation obtained by using the larger benthic foraminifera of the Yenice and Asartepe members. According to frequency analysis values, rarely, seldom, generally, frequently, and commonly observed genera and species were determined. The frequency analysis …
Devonian-Carboniferous Brachiopods And Biostratigraphic Findings From The Kangal Phyllite-Slate Formation (Greenschist), Sivas, Turkey, Cazi̇be Sayar, Ali̇ Seydi̇ Gülteki̇n, Mustafa Si̇mav Bargu, Esra Alkan
Devonian-Carboniferous Brachiopods And Biostratigraphic Findings From The Kangal Phyllite-Slate Formation (Greenschist), Sivas, Turkey, Cazi̇be Sayar, Ali̇ Seydi̇ Gülteki̇n, Mustafa Si̇mav Bargu, Esra Alkan
Turkish Journal of Earth Sciences
The Kangal Phyllite-Slate Formation forms the basement rocks in Kangal-Çetinkaya-Alacahan-Divriği (Sivas). These late Paleozoic phyllite-slate associations occupy a large area, possibly composed of Early Paleozoic sediments in its lower part. The lower levels (Bakırtepe Metaquartzite Member; 0-500 m) and uppermost levels comprise the Düzce Recrystallized Limestone Member (0-25 m). The lower boundary is invisible and the upper boundary is unconformably overlain by the Kıratgediği Limestone (late Jurassic- early Cretaceous). The studied brachiopod fauna, about 400 specimens, was collected from the 150-m-thick uppermost part of the greenschist sequences in the Kulluk Hill area, Elkondu village, 25 km east of Kangal. Some …
Convergence-Aligned Foreland Magmatism In The Arabia-Anatolia Collision:Geochronological Evidence From The Karacadağ Volcanic Complex, South-East Turkey, Taner Eki̇ci̇, Colin G. Macpherson
Convergence-Aligned Foreland Magmatism In The Arabia-Anatolia Collision:Geochronological Evidence From The Karacadağ Volcanic Complex, South-East Turkey, Taner Eki̇ci̇, Colin G. Macpherson
Turkish Journal of Earth Sciences
New 40Ar/39Ar ages are presented for volcanic rocks from the Karacadağ Volcanic Complex (KVC) in SE Anatolia. These extend the oldest age recognised for the KVC for lavas from the Siverek Phase plateau basalt back to at least 17 Ma. Our data agree with prior studies that the second, Karacadağ Phase of igneous activity began at about 4.5 Ma with a peak between 2 and 1 Ma, but in contrast to previous work we find that this included volcanism on the Mt. Karacadağ ridge from the earliest part of this phase. Construction of the Mt. Karacadağ ridge coincided with development …
Primary Report Of First Documentation Of Mammal Footprints From The Late Oligocene Inthe Sivas Basin, Turkey, Beki̇r Levent Mesci̇, Ahmet Cem Erkman, Şaki̇r Önder Özkurt
Primary Report Of First Documentation Of Mammal Footprints From The Late Oligocene Inthe Sivas Basin, Turkey, Beki̇r Levent Mesci̇, Ahmet Cem Erkman, Şaki̇r Önder Özkurt
Turkish Journal of Earth Sciences
The footprints in this study, which were considered to have been made by ungulates, were discovered on mudstone that was approximately 5 cm thick, near an abundant mud-cracked plane located on the stratigraphic subsurface of the late Oligocene Karayün Formation, which crops out over wide areas in southern Sivas (Turkey) and has terrestrial, fluvial sediment characteristics. These ungulate footprints documented from the late Oligocene of the Karayün Formation in southern Sivas represent the first reported vertebrates in Anatolia. The footprints of three different species of ungulates were identified. The shapes, depth, and widths of the footprints provided some basic ichnotaxonomic …
Frequency-Dependent Body-Q And Coda-Q In Karlıova Triple Junction And Its Vicinity,Eastern Turkey, Alper Demi̇rci̇
Frequency-Dependent Body-Q And Coda-Q In Karlıova Triple Junction And Its Vicinity,Eastern Turkey, Alper Demi̇rci̇
Turkish Journal of Earth Sciences
A dataset obtained from six broadband stations of 111 small- to moderate-sized local events that occurred between 2010 and 2018 was analyzed to reveal the frequency-dependent seismic body (body-Q) and coda (coda-Q) wave attenuation characteristics of three tectonic branches of the Karlıova Triple Junction: the Varto Fault Zone (VFZ), North Anatolian Fault Zone (NAFZ), and East Anatolian Fault Zone. The magnitude range was between 2.8 and 6.1 with shallow (
Miocene Sediment Mineralogy Of The Lower Chelif Basin (Nw Algeria):Implications For Weathering And Provenance, Fatiha Hadji, Abbas Marok, Ali Mokhtar-Samet
Miocene Sediment Mineralogy Of The Lower Chelif Basin (Nw Algeria):Implications For Weathering And Provenance, Fatiha Hadji, Abbas Marok, Ali Mokhtar-Samet
Turkish Journal of Earth Sciences
Mineralogical investigations of clay and nonclay minerals were conducted on the Miocene sediments from three sections of the lower Chelif basin, northern Algeria. Bulk rock analyses of Miocene sediments show that these clastic sediments are dominated by variable mineralogical compositions and concentrations. Quartz is the dominant mineral through the three stratigraphic intervals and calcite (except in the upper layers) and dolomite are lacking in the Messinian deposits. The clay mineralogy is dominated by smectite (24%) and mixed-layer illite-smectite (I-S) (22%) during the Burdigalian-Langhian, illite (36%) and kaolinite (28%) in the Tortonian, and illite (49%) and I-S (20%) in the Messinian …
Relationship Between The Anisotropy Of Magnetic Susceptibility And Development Of The Haymana Anticline, Central Anatolia (Turkey), Murat Özkaptan, Erhan Gülyüz
Relationship Between The Anisotropy Of Magnetic Susceptibility And Development Of The Haymana Anticline, Central Anatolia (Turkey), Murat Özkaptan, Erhan Gülyüz
Turkish Journal of Earth Sciences
Integrated structural and anisotropy of magnetic susceptibility (AMS) analyses were carried out on the Campanian- Maastrichtian shale-mudstone dominated sedimentary sequences (Haymana Formation) cropping out within the doubly plunging Haymana Anticline in Central Anatolia (Turkey). In order to understand the relationship between the development of magnetofabrics and the tectonic processes, six sites from different parts of the anticline were sampled and analyzed. AMS lineations from 634 cylindrical samples and structural data were collected in the field. The results show very high correlation with the structural trend of the region and indicate that the maximum susceptibility vector (k1) is almost parallel to …
Sedimentological And Mineralogical Characteristics Of Red Soil In South Pirin Mountains(Southwest Bulgaria), Rossitza Kenderova, Ahinora Baltakova, Marlena Yaneva
Sedimentological And Mineralogical Characteristics Of Red Soil In South Pirin Mountains(Southwest Bulgaria), Rossitza Kenderova, Ahinora Baltakova, Marlena Yaneva
Turkish Journal of Earth Sciences
The northernmost derivation of the Mediterranean climatic influence and the wide distribution of carbonate rocks are factors that could explain red soils distribution in the lands of Southern Bulgaria. However, due to the mainly mountainous landscape, red soils can be found only on certain spots in Bulgaria. One of the most typical examples of red soil can be found in the lands of Nova Lovcha Village in Bulgaria, but this area was not studied in detail due to its border position. In this study, the catena principle was used to estimate the parental material and slope drainage relationships as factors …
Application Of Zircon Typology Method To Felsic Rocks (Cappadocia, Central Anatolia, Turkey): A Zircon Crystallization Temperature Perspective, Lütfi̇ye Akin, Erkan Aydar, Axel Karl Schmitt, Hüseyi̇n Evren Çubukçu
Application Of Zircon Typology Method To Felsic Rocks (Cappadocia, Central Anatolia, Turkey): A Zircon Crystallization Temperature Perspective, Lütfi̇ye Akin, Erkan Aydar, Axel Karl Schmitt, Hüseyi̇n Evren Çubukçu
Turkish Journal of Earth Sciences
Zircon typology was developed nearly half a century ago as a tool for constraining the thermochemical conditions in granitic magmas from the morphology of zircon prismatic and pyramidal crystal surfaces. Although the method precedes experimentally constrained zircon-based thermometers (zircon saturation, Ti-in-zircon), the morphology of zircon remains an important criterion for zircon studies commonly relying on visual recognition of crystals during sample purification via hand-picking. This may introduce selection bias if morphologically distinct zircon crystals are present in a population. We conducted a comparison between zircon typology and thermochemical constraints from zircon thermometry and whole rock compositions. Therefore, we focused on …
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 …
The Early Eocene Ekmekçi Granodiorite Porphyry In The Karacabey Region(Sakarya Zone, Nw Turkey), Gürsel Sunal, Mehmet Korhan Erturaç, Gülteki̇n Topuz, Aral Okay, Thomas Zack
The Early Eocene Ekmekçi Granodiorite Porphyry In The Karacabey Region(Sakarya Zone, Nw Turkey), Gürsel Sunal, Mehmet Korhan Erturaç, Gülteki̇n Topuz, Aral Okay, Thomas Zack
Turkish Journal of Earth Sciences
The Ekmekçi granodiorite porphyry is a unit in the E-W trending, postcollisional Eocene magmatic rocks of northern Anatolia. It occurs as a relatively small stock, but represents a link between plutonic and volcanic rocks. This Early Eocene granodiorite porphyry intruded into the Upper Triassic rocks of the Karakaya complex in the Sakarya Zone. In this study we present geochemical and zircon U-Pb LA-ICP-MS age data to contribute to understanding the Early Tertiary postcollisional tectonic setting of NW Anatolia. The granodiorite porphyry includes plagioclase, quartz, hornblende, K-feldspar, biotite, and minor zircon, apatite, sphene, and opaque minerals. The stock displays medium-K calc-alkaline …
Petrography, Geochemistry, And Provenance Of Jurassic Sandstones From Thesakarya Zone, Nw Turkey, Firat Şengün, Osman Ersi̇n Koralay
Petrography, Geochemistry, And Provenance Of Jurassic Sandstones From Thesakarya Zone, Nw Turkey, Firat Şengün, Osman Ersi̇n Koralay
Turkish Journal of Earth Sciences
The Jurassic sandstones exposed in the western part of the Sakarya Zone are yellowish to brown, moderate to well sorted, medium to coarse-grained, grain-supported, and cemented by calcareous and minor silica. Sandstones are mainly classified as litharenite, subarkose, and arkose according to the relative proportions of quartz, feldspar and rock fragments, and major element ratios. On the SiO2 variation diagram, Na2O and K2O show slight positive correlations, which could reflect abundance of sodic plagioclase and K-feldspar with quartz within high Si-content sandstones. Sandstones generally exhibit slight LREE enrichment with respect to HREEs. The REE plots are characteristic for sedimentary rocks …
Geology, Fluid Inclusion, And Stable Isotope (O, H, S, C) Characteristics Of The Hazinemağara (Gümüşhane) Lead-Zinc Deposit, Ne Turkey, Esra Ünal Çakir, Ahmet Gökce
Geology, Fluid Inclusion, And Stable Isotope (O, H, S, C) Characteristics Of The Hazinemağara (Gümüşhane) Lead-Zinc Deposit, Ne Turkey, Esra Ünal Çakir, Ahmet Gökce
Turkish Journal of Earth Sciences
The Hazinemağara (Gümüşhane) Pb-Zn deposit is located in the southern part of the Eastern Pontides Orogenic Belt in northeastern Turkey. It occurs as irregularly shaped ore bodies with breccia fill structure within the intraformational breccia or brecciated horizons of limestone in the Upper Jurassic-Lower Cretaceous Berdiga Formation. The dominant ore minerals are pyrite, sphalerite, galena, and tetrahedrite, and the major gangue minerals are calcite, quartz, and barite. Microthermometric investigations of the fluid inclusions show that the ore-forming fluids contain CaCl2 and MgCl2 in addition to NaCl. The salinity of the fluid ranges from 1.7% to 9.2% with an average of …
Gps-Derived Source Parameters Of The 2014 North Aegean Earthquake (Mw 6.9), Asli Doğru, Bahadir Aktuğ, Fati̇h Bulut, Haluk Özener
Gps-Derived Source Parameters Of The 2014 North Aegean Earthquake (Mw 6.9), Asli Doğru, Bahadir Aktuğ, Fati̇h Bulut, Haluk Özener
Turkish Journal of Earth Sciences
We analyzed GPS data to investigate the source parameters of the 2014 North Aegean earthquake (Mw 6.9). We simultaneously inverted strike, dip, rake, average slip, moment, size, and location of the mainshock rupture using coseismic displacements. We also investigated static stress change associated with the mainshock and its influence on aftershock activity. Previous solutions of focal mechanism showed that mainshock has a nearly pure strike-slip nature. Our results also indicate that the mainshock has a right lateral strike-slip mechanism with a substantial extensional component. Average coseismic slips are 48 cm and 25 cm on the horizontal and vertical axis, respectively. …