Yazarlar

• Aktağ, Alican(3)
• Sayit, Kaan(3)
• Furman, Tanya(2)
• Peters, Bradley J.(2)
• Danismaz, Harun(1)
• Erturac, Mehmet Korhan(1)
• Karabacak, Volkan(1)
• Karakus, Sinem(1)
• Korkmaz, Mustafa(1)
• Koroglu, Kemalettin(1)
• Kul, Ahmet Ozkan(1)
• Rickli, Jörg(1)
• Sancar, Taylan(1)
• Selcuk, Azad Saglam(1)
• Selvi, Selami(1)
• Us, Muhammed Sami(1)
• Yavuz, Mehmet Ali(1)
• Çakilcioglu, Ugur(1)
• Önal, Ayten Öztüfekçi(1)

• MakaleYalnız künye2026Scopus SJRQ2/r/munzur/998
  Stratigraphy, mineralogy, paleodepositional environment, and diagenetic evolution of the Pülümür evaporites (Tunceli, Eastern Anatolia, Türkiye)

  Us, Muhammed Sami

  The gypsum member of the Balpayam Formation (GMoBF) in the Pülümür Kırmızıköprü Basin (PKB), Eastern Anatolia, records a complex evaporitic system shaped by episodic tectonism, volcanism, and fluctuating hydrological conditions. Stratigraphic logging, facies analysis, and systematic sampling from outcrops and quarries enabled a detailed assessment of the evaporite succession. Petrographic data reveal pervasive secondary gypsum textures, including porphyroblastic, alabastrine, laminated, brecciated, and satin-spar fabrics preserving relics of primary anhydrite and calcite. XRD and FIB-SEM-EDS analyses identify gypsum, anhydrite, celestine, dolomite, calcite, clay minerals, and minor siliciclastic, clarifying diagenetic pathways. Diagenesis initiated with early calcite and aragonite precipitation, followed by replacement by primary anhydrite and gypsum under elevated Mg2+/Ca2+ ratios and shallow burial. Later hydration, dehydration, and rehydration cycles produced secondary gypsum with distinctive microtextures and micro-hydration channels. The PKB reflects a dual depositional system: a shallow, low-energy, restricted lagoon dominated by massive-laminated gypsum, stromatolitic textures, and organic-rich layers, and a comparatively deeper open marine setting with laminated-banded gypsum and transported gypsum arenite-rudite facies. Chicken-wire gypsum and anhydrite nodules indicate synsedimentary to early diagenetic formation under hypersaline conditions. A schematic depositional model constrains the temporal and spatial evolution of diagenetic processes, highlighting the interaction among evaporite deposition, tectonic activity, and environmental fluctuations in the southern Neo-Tethys Ocean of Eastern Anatolia.

  İncele
• MakaleAçık Erişim2024Scopus SJRQ1/r/munzur/2281
  Delamination Magmatism in Eastern Anatolia: A Geochemical Perspective

  Aktağ, Alican; Sayit, Kaan; Furman, Tanya; Peters, Bradley J.

  The Sr-Nd-Hf-Pb isotope geochemistry of the Late Miocene Tunceli Volcanics suggests that they are the products of mixed asthenospheric and lithospheric mantle melts. The combined elemental and mineral chemistry data additionally indicate that a pyroxenite component of lithospheric origin is involved in their genesis. Calculations favor melting depths of ∼2 GPa for the Tunceli lavas, that is, deeper than the current lithosphere-asthenosphere boundary beneath Eastern Anatolia. Geochemical data suggest that during regional Neo-Tethyan subduction, dense (i.e., pyroxenite-bearing) domains formed by progressive melt intrusion into the lower lithosphere resulted in gravitational instabilities. This unstable density configuration eventually led to the foundering of the eastern Anatolian lithosphere in the Late Miocene, resulting in progressive melting of fusible pyroxenite-bearing domains at asthenospheric depths. We demonstrate that these pyroxenitic melts mixed with ambient asthenospheric melts and generated the Tunceli lavas.

  AtıfScopus7·OpenAlex9

  İncele
• MakaleAçık Erişim2022Scopus SJRQ1/r/munzur/2555
  Trace element and Sr-Nd-Hf-Pb isotopic constraints on the composition and evolution of eastern Anatolian sub-lithospheric mantle

  Aktağ, Alican; Sayit, Kaan; Peters, Bradley J.; Furman, Tanya; Rickli, Jörg

  Quaternary Elazığ mafic alkaline volcanism is part of the anorogenic volcanic system of the circum-Mediterranean region, and it provides crucial insights into the chemical nature of the mantle source domains beneath eastern Turkey. Elemental and isotope geochemistry reveals that these mafic lithologies are mainly free of crustal contamination, reflecting geochemical signatures inherited from partial melting of their mantle sources. The trace element and Sr-Nd-Hf-Pb isotope systematics of the most primitive members of this volcanism are consistent with a predominant contribution from a sub-lithospheric component which compositionally resembles component C, believed to be common to global OIBs and MORBs. However, the total range of the isotope data also requires the involvement of two additional mantle components into their genesis: a depleted asthenospheric component (DM) and an enriched component (EM-type) representing metasomatized lithospheric mantle. We propose that the recycled oceanic lithologies with C-like signatures are dispersed in the asthenospheric mantle beneath eastern Anatolia and have undergone mixing with the depleted mantle matrix. When considering these with the melting models, it appears that the garnet-facies partial melts of the C-DM mixture have experienced a small degree of interaction with the melts from an SCLM domain modified by slab-derived melts and/or fluids. The metasomatized SCLM domain may be intrinsic to the eastern Anatolian lithosphere or occur as pods embedded in the asthenosphere. The chemical characteristics of the Elazığ Volcanics may confirm the wide-range dispersal of the common component in the sub-lithospheric mantle beneath the region extending from western Europe to eastern Turkey. However, the common component resides beneath Anatolia appear to have distinct composition (i.e., Pb isotope systematics) than the ubiquitous component shared mostly by European intraplate volcanics (i.e., LVC/EAR).

  AtıfScopus3·OpenAlex4

  İncele
• MakaleAçık Erişim2021/r/munzur/2623
  Active Tectonic Setting and Paleoseismicity of the Sancak-Uzunpazar Fault Zone; [Sancak-Uzunpazar Fay Zonu’nun Genç Tektonik Konumu ve Paleosismitesi]

  Selcuk, Azad Saglam; Erturac, Mehmet Korhan; Karabacak, Volkan; Sancar, Taylan; Kul, Ahmet Ozkan; Yavuz, Mehmet Ali

  Sancak-Uzunpazar Fault Zone is N40E-trending sinistral shear zone that has a 50 km length and 5 km width between Karakocan (Elazığ) in southwest and Kaynarpınar (Bingöl) in northeast. The fault extends parallelly to East Anatolian Fault is bounded by the North Anatolian Fault to the northeast and Karakoçan Fault to the southeast. Herein, morphological features, the tectonic setting of the Sancak-Uzunpazar Fault Zone and the first paleoseismological studies on it is represented. The Sancak-Uzunpazar Fault Zone is consist of two parallel segments (called East and West) with a 1.5 km distance. Conducted field studies and aerial photogrometry show that the segments exhibit morphological features like faceted surfaces, faulted scarps, shutter ridges, and offset streams. Especially, average offsets are about 7-12 m along the eastern segment while the cumulative maximum offset reaches 1.1 km. Moreover, revealed paleoseismological data show evidence of at least two surface ruptures during Holocene. Obtained morphological data reveal that the Sancak-Uzunpazar Fault Zone may have a relatively lower slip rate when compared to other active faults in the region and the reflection of the slip rate to the morphology is more evident in the eastern segment.

  AtıfScopus1·OpenAlex2·TR Dizin3

  İncele
• MakaleAçık Erişim2019Scopus SJRQ2/r/munzur/3450
  Geochemistry of the post-collisional Miocene mafic Tunceli Volcanics, Eastern Turkey: Implications for the nature of the mantle source and melting systematics

  Aktağ, Alican; Önal, Ayten Öztüfekçi; Sayit, Kaan

  The East Anatolian Accretionary Complex (EAAC) comprises an ideal example of post-collisional volcanism within the Africa-Eurasia collision zone. The Miocene mafic Tunceli Volcanics, as a part of this post-collisional volcanic system, are located in the western termination of EAAC. The mafic Tunceli Volcanics are characterized by mildly alkaline and tholeiitic basalts, in which olivine, clinopyroxene and plagioclase characterize the main mineralogy. The role of fractional crystallization (FC) and assimilation combined with fractional crystallization (AFC) processes appear to be negligible in the petrogenesis of the primitive mafic Tunceli Volcanics. Relative enrichment in large ion lithophile elements (LILE), Th and La over high field strength elements (HFSE) and heavy rare earth elements (HREE) suggest contribution from a metasomatized mantle source. The wide range of ratios displayed by these elements also calls for some asthenospheric input for the genesis of these volcanics. The metasomatizing agents can be attributed to a past subduction event, probably during the closure of Neotethys. Considering also the geophysical constraints, which limits the lithospheric thickness to about 70–75 km around the region, a melt mixing between lithospheric and asthenospheric melts generated at different depths appear to be an important process in the petrogenesis of these lavas. The combined geochemical and geophysical data, therefore, necessitate a geodynamic model with some remnant lithospheric mantle underlying the Eastern Anatolian region.

  AtıfScopus10·WoS11·OpenAlex13

  İncele
• MakaleYalnız künye2018Scopus SJRQ1/r/munzur/4638
  The Origin of Stepped Rock-Cut Tunnels in Eastern Anatolia

  Koroglu, Kemalettin; Danismaz, Harun

  Stepped rock-cut tunnels are among the most interesting remains at many fortresses in Eastern Anatolia. The construction of these tunnels, which are cut deep into rock surfaces up to a length of 350 m, must have been at least as difficult as that of the fortification walls and expertise would have been required. Stepped rock-cut tunnels and associated fortresses in Eastern Anatolia have not so far been evaluated as a whole. The stepped rock tunnels in Eastern Anatolia have been accepted as one of the basic criteria indicating the Urartian period since the beginning of the 20th century. In this study, we first consider the types of stepped rock-cut tunnels in Eastern Anatolia, the purposes of their construction, and their distribution. We then discuss their dating and our interpretation of the period of their arrival in the region of Eastern Anatolia.

  AtıfWoS7·OpenAlex4

  İncele
• MakaleYalnız künye2016Scopus SJRQ1/r/munzur/4241
  Traditional knowledge on wild plants in Uzumlu (Erzincan-Turkey)

  Korkmaz, Mustafa; Karakus, Sinem; Selvi, Selami; Çakilcioglu, Ugur

  This survey was conducted in Uzumlu district and its surrounding villages in order to determine the useful plants consumed for different ethnobotanical purposes such as animal fodder, ornamental plant, good, fuel, and dye by the local people living in the area between 2010 and 2011 summer vegetation periods. Totally 77 traditional uses of 64 plant taxa were determined at the end of the study. The biggest families with the numbers of taxa were Fabaceae (10), Asteraceae (9), Rosaceae (6), Salicaceae (4) Brassicaceae, Poaceae, and Liliaceae (3). All parts of 42 plants, stems of 11 plants, flowers of 6 plants, branches of 5 plants, seeds of 3 plants, fruits of 3 plants, aerial parts of 2 plants, fruit exocarp of 2 plants, and root of 1 plant were determined to be used for different purposes. In addition, local names and ethnobotanical aspects of totally 17 taxa (26.5 %) were presented firstly in this study. East Anatolia is a very important region of Turkey in terms of plant diversity, and many studies have been conducted on the traditional uses of plants; but, the least have been carried out in Erzincan province. Because of that, this study was conducted in the area.

  AtıfWoS28

  İncele