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Articles 1 - 11 of 11
Full-Text Articles in Physical Sciences and Mathematics
Filograna Minor Nov. Sp. (Worm Tube) From The Middle Triassic (Anisian) Reef Boulders Of The Karaburun Peninsula, Western Turkey, Baba Senowbari-Daryan, Michael Link, İsmai̇l Işintek
Filograna Minor Nov. Sp. (Worm Tube) From The Middle Triassic (Anisian) Reef Boulders Of The Karaburun Peninsula, Western Turkey, Baba Senowbari-Daryan, Michael Link, İsmai̇l Işintek
Turkish Journal of Earth Sciences
A colonial serpulid worm tube, Filograna minor nov. sp., from the Anisian reef boulders of the Karaburun Peninsula, Western Turkey is described. The Filograna-bearing boulders occur together with Anisian reef boulders within the Upper Anisian siliciclastic deposits of the Gerence Formation. Filograna minor differs from the Norian species Filograna serialis, described by Senowbari-Daryan and Link from the Taurus Mountains, by the smaller dimensions of the tubes.
Sulfur And Lead Isotope Investigations Of The Carbonate-Hosted Pb-Zn Deposits In The Yahyalı Region, Kayseri, Southern Turkey, Osman Koptagel, Ulvi̇ Ulusoy, Anthony E. Fallick
Sulfur And Lead Isotope Investigations Of The Carbonate-Hosted Pb-Zn Deposits In The Yahyalı Region, Kayseri, Southern Turkey, Osman Koptagel, Ulvi̇ Ulusoy, Anthony E. Fallick
Turkish Journal of Earth Sciences
Carbonate-hosted Pb-Zn deposits are common in the Yahyalı region (Taurus Belt) with galena the most abundant sulfide mineral. The mean d34S values for Göynük, Celaldağı Desandre, Demircilik, Tekke, Havadan and Suçatı deposits were +0.2±0.5, +9.3±0.8, +10.7±1.3, +10.8±1.3, +11.5±2.4, -4.2±0.4%o, respectively. The mean 206Pb/204Pb, 207Pb/204Pb and 208Pb/204Pb measurements for the studied deposits were 18.968±0.005, 15.741±0.005 and 39.074±0.016 for Göynük, 18.702±0.006, 15.715±0.006 and 38.883±0.021 for Celaldağı Desandre, 18.618±0.020, 15.727±0.008 and 38.852±0.032 for Demircilik, 18.808±0.017, 15.751±0.028 and 38.983±0.166 for Suçatı. The sulfur isotope systematics imply that sulfur originated from a mixture of different sources for the Göynük and Suçatı deposits, but was probably …
Environmental Impact And Drainage Geochemistry In The Vicinity Of The Harput Pb-Zn-Cu Veins, Elazığ, Se Turkey, Leyla Kalender, Cemal Bölücek
Environmental Impact And Drainage Geochemistry In The Vicinity Of The Harput Pb-Zn-Cu Veins, Elazığ, Se Turkey, Leyla Kalender, Cemal Bölücek
Turkish Journal of Earth Sciences
The aim of this study was to examine the environmental impact of major, minor and rare-earth elements (REE) in spring waters and major and minor elements in stream sediments proximal to known vein-type Pb-Zn-Cu ores. Accordingly, a total of 21 water samples were collected from natural springs in the Köprücük, Çolaklı, Kabakçılar and Ekinli areas where ore-bearing rocks are widely exposed. Stream-sediment samples were taken from the Kurt, Kızıldağ and Karacalar and Billurik streams, and a total of 57 samples were sieved to three different size fractions (-80 +140, -140 +200 and -200 mesh) and analyzed by ICP-MS and IE …
Lake Hazar Basin: A Negative Flower Structure On The East Anatolian Fault System (Eafs), Se Turkey, Ercan Aksoy, Murat İnceöz, Ali̇ Koçyi̇ği̇t
Lake Hazar Basin: A Negative Flower Structure On The East Anatolian Fault System (Eafs), Se Turkey, Ercan Aksoy, Murat İnceöz, Ali̇ Koçyi̇ği̇t
Turkish Journal of Earth Sciences
The East Anatolian Fault System (EAFS) is a 30-km-wide, 700-km-long and NE-trending sinistral strike-slip megashear belt between the Anatolian platelet in the northwest and African-Arabian plates in the southeast. It is located between Karlıova County in the NE and Karataş (Adana)-Samandağ (Antakya) in the SW. In the Lake Hazar region, the EAFS consists of five fault zones. These are, from north to south, the Elazığ fault zone, the Uluova fault zone, the Sivrice fault zone, the Adıyaman fault zone and the Lice-Çermik fault zone; in previous studies only the Sivrice fault zone has been reported to be part of the …
Constraints On The Origin Of The Balıkesir Thermal Waters (Turkey) From Stable Isotope (\Delta^{18}O, \Deltad, \Delta^{13}C, \Delta^{34}S) And Major-Trace Element Compositions, Hali̇m Mutlu
Turkish Journal of Earth Sciences
The Balıkesir thermal waters in northwestern Turkey have discharge temperatures in the range of 31.8-98.5 ºC, near neutral pH values of 6.40 to 8.40 and TDS contents between 327 and 2578 mg/l. Samples display variable chemical compositions changing from high-temperature Na_2SO_4-NaHCO_3 waters to warmer CaHCO_3 waters. Trace element concentrations of the waters show significant variation. Comparison between the concentrations of alkaline earth metals in waters and carbonate deposits reveals mobile behavior for Mg and Ba. The ratio of strontium to calcium concentrations in solid and liquid phases was found to be almost the same. Li/Cs and B/Cl ratios of waters …
Pharyngeal Teeth, Lateral Ethmoids, And Jaw Teeth Of Fishes And Additional Fossils From The Late Miocene (Late Khersonian / Early Maeotian) Of Eastern Paratethys (Yalova, Near İstanbul, Turkey), Neri̇man Rühkert Ülkümen, Erdi̇nç Yi̇ği̇tbaş
Pharyngeal Teeth, Lateral Ethmoids, And Jaw Teeth Of Fishes And Additional Fossils From The Late Miocene (Late Khersonian / Early Maeotian) Of Eastern Paratethys (Yalova, Near İstanbul, Turkey), Neri̇man Rühkert Ülkümen, Erdi̇nç Yi̇ği̇tbaş
Turkish Journal of Earth Sciences
A late Khersonian to early Maeotian fossil assemblage from the Upper Miocene to Lower Pliocene Yalakdere Formation near Yalova city (northwestern Anatolia, Turkey) is documented. The following fish taxa, represented by pharyngeal teeth, lateral ethmoids and jaw teeth are described: Cyprinidae with Carassius sp., Tinca sp., Scardinius sp., Leuciscus sp., Barbus sp., Cobitidae with Cobitis sp., Siluridae with Silurus sp., and Esocidae with Esox sp.. Further described vertebrates are reptiles (Trionyx sp.) and small mammals (cf. Eliomys intermedius FRIANT). Additional invertebrate fauna and flora, comprising diverse gastropods, ostracods, charophytes, pollen and limnic green algae, are listed. The fossil assemblage from …
Late Visean–Early Namurian Bivalves From The Zonguldak Coal Basin, Northwestern Turkey, Yavuz Okan, İzzet Hoşgör
Late Visean–Early Namurian Bivalves From The Zonguldak Coal Basin, Northwestern Turkey, Yavuz Okan, İzzet Hoşgör
Turkish Journal of Earth Sciences
Marine bivalves Septimyalina sublamellosa (Etheridge 1878), Septimyalina lamellosa (de Koninck 1842), Septimyalina minor (Brown 1841) and Posidonia becheri Bronn, 1828 are described from the Visean-Namurian transition of Zonguldak coal basin, Northwestern Turkey. Macroinvertebrate fossils are rare in the Lower Carboniferous of the Zonguldak coal basin and only a few shallow marine forms of Myalinidae and Posidoniidae families are present. Their palaeobiogeographic distribution delineates a seaway from Britain to the Black Sea coast during the Carboniferous.
A Condensed Mesozoic Succession North Of İzmir: A Fragment Of The Anatolide-Tauride Platform In The Bornova Flysch Zone, Aral İ. Okay, Demi̇r Altiner
A Condensed Mesozoic Succession North Of İzmir: A Fragment Of The Anatolide-Tauride Platform In The Bornova Flysch Zone, Aral İ. Okay, Demi̇r Altiner
Turkish Journal of Earth Sciences
The Bornova Flysch Zone consists of large blocks of Mesozoic limestone, basalt, serpentinite and radiolarian chert in a highly sheared clastic matrix of latest Cretaceous to Paleocene age. We describe a condensed Mesozoic section from a limestone block near the village of Urbut, 27 km southwest of Bigadiç, north of İzmir. The section, 81 m thick, starts with massive, thickly-bedded Upper Triassic carbonates with megalodonts and foraminifera characteristic of Late Norian-Rhaetian. These are unconformably overlain by condensed, hemipelagic Tithonian-Middle Albian limestones, 19 m thick, with gaps in the succession. The condensed sequence is, in turn, unconformably overlain by red, pink …
Late Ypresian To Middle Lutetian Orthophragminid Record From Central And Northern Turkey: Taxonomy And Remarks On Zonal Scheme, Ercan Özcan, György Less, Botond Kertesz
Late Ypresian To Middle Lutetian Orthophragminid Record From Central And Northern Turkey: Taxonomy And Remarks On Zonal Scheme, Ercan Özcan, György Less, Botond Kertesz
Turkish Journal of Earth Sciences
Orthophragmines are one of the commonest larger foraminifera in the late Paleocene-Eocene shallow-marine deposits of Turkey. Following several common lineages, such as Discocyclina archiaci, Orbitoclypeus schopeni and O. multiplicatus, a major turnover in the orthophragminid composition - both in diversity and abundance - is observed to occur around the early-late Ypresian boundary. This is manifested in the first appearance/dominance of such important lineages like Discocyclina augustae, D. fortisi, Nemkovella strophiolata, Orbitoclypeus douvillei, O. varians, O. furcatus, Asterocyclina stellata and A. alticostata simultaneously with the disappearance of O. multiplicatus and other forms. These and their successors, ranging up at least to …
Petrography, Geochemistry And Origin Of Lower Liassic Dolomites In The Aydıncık Area, Mersin, Southern Turkey, Muhsi̇n Eren, Meryem Yeşi̇lot Kaplan, Selahatti̇n Kadi̇r
Petrography, Geochemistry And Origin Of Lower Liassic Dolomites In The Aydıncık Area, Mersin, Southern Turkey, Muhsi̇n Eren, Meryem Yeşi̇lot Kaplan, Selahatti̇n Kadi̇r
Turkish Journal of Earth Sciences
In the Aydıncık area, the Lower Liassic carbonates consist predominantly of dolomites, including limestone and dolomitic limestone intervals. These carbonates were deposited in peritidal environments, and later underwent early and late stage dolomitization. Petrographically, three dolomite-types are determined: (1) very fine to fine crystalline dolomite (T1) with crystal size of 13-65 µm and a good fabric preservation, (2) coarse crystalline sucrosic dolomite (T2) with size of 65 to 270 µm and fabric destruction, and (3) dolomite cement (T3) that occurs as a clear outer rim to cloudy coarse dolomite crystals (T2) or as a pore-lining and cement-fill of fenestral pores. …
Jurassic Volcanism In The Eastern Pontides: Is It Rift Related Or Subduction Related?, Cüneyt Şen
Jurassic Volcanism In The Eastern Pontides: Is It Rift Related Or Subduction Related?, Cüneyt Şen
Turkish Journal of Earth Sciences
The Jurassic volcanic rocks in the centre of the northern zone (south of Trabzon City) provide important constraints on the evolution of Pontides. The investigated volcanic rocks form a transitional series between tholeiitic and calc-alkaline, and is dominated by basalt, basaltic andesite and andesite. Geochemically, they are enriched in LILE and LREE contents and depleted in HFSE [(La/Yb)_N= 2.2 - 8.5; (Nb/La)_N= 0.1 - 0.77)] compared to mid-ocean ridge basalts and have radiogenic Nd isotope ratios of \epsilonNd(210 Ma)= -0.72 to 3.24. These trace element and isotope data suggest that these rocks were derived from low degrees of partial melting …