Responses of the planktonic foraminifera to environmental conditions across the cretaceous/paleogene boundary in the Göynük basin, Northwest Anatolia, Turkey

Download

index.pdf

Date

2019

Author

Özder, Rengin

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

192
views

54
downloads

The aim of this study is to reveal the evolutionary response of the planktonic foraminifera after the Cretaceous/Paleogene (K/Pg) boundary interval in the Göynük Basin, Northwest Anatolia, Turkey. To achieve this purpose, a multidisciplinary study including biostratigraphy and mineralogy was carried out. In the Göynük area, an 8.55 m-thick section was measured, and a total of 47 samples were collected from the Seben Formation and the Hisarözü member of this formation composed of marls and clayey limestones. In the Göynük section, five biozones were identified in the ascending order; Pseudoguembelina hariaensis Zone, P0, P1a, P1b, and P1c zones. The K/Pg boundary was delineated between the P. hariaensis and P0 zones. In order to study the evolutionary recovery of the planktonic foraminifera, a quantitative analysis was carried out from the samples of the P1b and P1c zones. Results indicate that the r/Kstrategists and r strategists occurred together in the P1b zone, whereas in the P1c zone, K-strategists were totally dominant. Microtektites have been recorded from uppermost Maastrichtian of the Göynük section; microspherules are highly abundant in the P0 zone where the r-strategists are dominant. Mineralogical studies, on the other hand, indicate that clay minerals in carbonate dominated marl samples are kaolinite, Ca-montmorillonite and illite. In the boundary, rutile, ilmenite, zircon, apatite, hematite, micas, hornblende inferring magmatic origin are present. Hg exists in the groundmass. All these microfacies, mineralogical, and geochemical findings, coinciding with the magnetic susceptibility results carried out in this study, might be the evidence of different phases of global Deccan volcanism, the possible cause of the delayed recovery of the planktonic foraminifera following the K/Pg mass-extinction in the Göynük Basin. Furthermore, the presence of the microtektites and microspherules probably indicate the effects of the Chicxulub impact.

Subject Keywords

Foraminifera, Planktonic., Planktonic Foraminifera, Delayed Recovery, Mineralogy and Mineral Chemistry, Cretaceous/Paleogene Boundary, Göynük Basin.

URI

http://etd.lib.metu.edu.tr/upload/12624270/index.pdf
https://hdl.handle.net/11511/44412

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Late Cretaceous-Eocene Geological Evolution of the Pontides Based on New Stratigraphic and Palaeontologic Data Between the Black Sea Coast and Bursa (NW Turkey) Ozcan, Zahide; Okay, Aral; Özcan, Ercan; Hakyemez, Aynur; Altıner, Sevinç (2012-01-01) The Late Cretaceous-Eocene geological evolution of northwest Turkey between the Black Sea and Bursa was studied through detailed biostratigraphic characterization of eleven stratigraphic sections. The Upper Cretaceous sequence in the region starts with a major marine transgression and lies unconformably on a basement of Palaeozoic and Triassic rocks in the north (Istanbul-type basement) and on metamorphic rocks and Jurassic sedimentary rocks in the south (Sakarya-type basement). Four megasequences have been...
Origin and significance of a quartz tourmaline breccia zone within the central anatolian crystalline complex, Turkey Demirel, Serhat; Göncüoğlu, Mehmet Cemal; Department of Geological Engineering (2004) The aim of this study is to investigate the petrography, geochemistry and evolution of quartz-tourmaline-rich rocks occurring in a wide breccia zone within the Late Cretaceous Kerkenez Granitoid (Central Anatolian Crystalline Complex (CACC), Turkey). The approximately 40-m wide main breccia zone has a NE-SW trend and is characterized by intense cataclastic deformation. The breccia zone can be traced several kilometers towards the west and generally occurs as tourmaline-filled faults and 1mm-30cm-thick veins...
Effect of watershed partitioning on hydrologic parameters and estimation of hydrograph of an ungauged basin: a case study in Gokirmak and Kocanaz, Turkey Kocyigit, Musteyde Baduna; Akay, Huseyin; Yanmaz, Ali Melih (Springer Science and Business Media LLC, 2017-08-01) The main goal of this study is to investigate the effect of the size of the subbasins of a watershed on the hydrologic parameters and their spatial variability in an estimation of the hydrologic parameters and hydrograph of a neighbouring ungauged basin. In this paper, Hydrologic Engineering Center-Hydrologic Modelling System (HEC-HMS), a semi-distributed hydrologic model, is used to calibrate and cross-validate two flood events occurred in 1998 and then validate four other flood events occurred in 1991, 19...
Factors Influencing the Invasion of the Alien Ctenophore Mnemiopsisleidyi Development in the Southern Caspian Sea Roohi, Aboulghasem; Pourgholam, Reza; Khenari, Ali Ganjian; Kıdeyş, Ahmet Erkan; Sajjadi, Ameneh; Kalantari, Ramin Abdollahzade (2013-11-01) Mnemiopsis leidyi population activities first were recorded during the coastal observations in 2001 in which its population considerably increased afterward and now sustained the southern Caspian Sea. Maximum summer-autumn M. leidyi abundance was recorded in euphotic layer in 2002 (851±85 ind.m-3) and maximum biomass was in 2001 with 48.1±14.4 g.m-3) while minimum were in aphotic layer. In years 2003 to 2011, M. leidyi abundance and biomass sharply declined to 1-843 ind.m-3 and 0.07-37.7 g.m-3, respectively...
Planktonic foraminiferal biostratigraphy, sequence stratigraphy and foraminiferal response to sedimentary cyclicity in the upper cretaceous-paleocene of the Haymana basin (Central Anatolia, Turkey) Amirov, Elnur; Altıner, Sevinç; Department of Geological Engineering (2008) The aim of this study is to establish the planktonic foraminiferal biozonation, to construct the sequence stratigraphical framework and to determine the foraminiferal response to sedimentary cyclicity in the sedimentary sequence spanning Upper Cretaceous-Paleocene in the Haymana basin (Central Anatolia, Turkey). In order to achieve this study, the stratigraphic section was measured from sedimentary sequence of the Haymana, Beyobası and Yeşilyurt formations. The sedimentary sequence is mainly characterized b...

Citation Formats

R. Özder, “Responses of the planktonic foraminifera to environmental conditions across the cretaceous/paleogene boundary in the Göynük basin, Northwest Anatolia, Turkey,” Thesis (M.S.) -- Graduate School of Natural and Applied Sciences. Geological Engineering., Middle East Technical University, 2019.