Prof. Dr. Ismail Omer Yilmaz

Professor of Sedimentology and Stratigraphy

Department of Geological Engineering

Head of the Department of Earth System Science

Middle East Technical University (METU)

Ankara, Turkey

Email: [email protected]

Qualifications

2002, Ph.D., Department of Geological Engineering, Middle East Technical University, Turkey

1998, M.Sc., Department of Geological Engineering, Middle East Technical University, Turkey

1994, B.Sc., Department of Geological Engineering, Middle East Technical University, Turkey

Research Interests

Platform Carbonates, Black Shales and Oceanic Events

Paleoclimatology, Paleogeography and Paleoceanography; Sedimentology, Stratigraphy and Sedimentary Geochemistry (stable isotopes and trace elements)

Cyclostratigraphy and Sequence Stratigraphy; Basin Analysis; Petroleum Geology; Natural Energy Resources

Publications (Selected)

1. Karaca, E., Yılmaz, İ.Ö., & Çiftçi, G. (2025). Stochastic Inversion-Driven Petrophysical Modelling in Sub-Tuning Reefal Carbonates: Soğucak Formation, Thrace Basin, Türkiye. Geophysical Prospecting, 73. DOI: 10.1111/1365-2478.70091
2. Karaca, E., Yılmaz, İ.Ö., Çiftçi, G., Tortopoğlu, B., & Akın, S. (2025). Integrated fracture analysis for improved oil recovery in the reefal limestones of Soğucak Formation, Northwest Thrace Basin, Türkiye. Marine and Petroleum Geology, 171. DOI: 10.1016/j.marpetgeo.2024.107198
3. Yıldırım, L.T.Ö., Yılmaz, İ.Ö., Çağlar, S., & Yıldırım, E.C. (2024). Source-rock and petrophysical evaluation of the Late Cretaceous Haymana Formation, Haymana Basin, Central Anatolia, Turkey. Petroleum Geoscience, 30, 1–21. DOI: 10.1144/petgeo2023-078
4. Külköylüoğlu, O., Yavuzatmaca, M., Ataman, A., Ayteğin, A., & Yılmaz, İ.Ö. (2024). Assessment of rarity and ecological preferences of the non-marine ostracods (Crustacea) in Çanakkale Province (Türkiye). Aquatic Sciences, 86, 1–17. DOI: 10.1007/s00027-024-01088-5
5. Bardet, N., Guinot, G., Yılmaz, İ.Ö., & Hoşgör, İ. (2022). New marine vertebrates (elasmobranchs, actinopterygians, reptiles) from the Upper Cretaceous Arabic Platform of SE Turkey. Comptes Rendus Palevol, 21(38), 837–845. DOI: 10.5852/cr-palevol2022v21a38
6. Yılmaz, İ.Ö., & Hoşgör, İ. (2022). The Paleozoic petroleum system of the Molla-Bismil area (Diyarbakır Basin, Turkey) and source rock properties of Lower Silurian (Llandovery) organic-rich shale. Marine and Petroleum Geology, 143, 1–17. DOI: 10.1016/j.marpetgeo.2022.105762
7. Yılmaz, İ.Ö., Schachner, A., Uysal, T., & Ünal İmer, E. (2022). Geochemical and petrographic approach for the origin of the limestone blocks of the walls of the Great Temple of Hattusha, Çorum (N-Turkey). Turkish Journal of Earth Sciences, 31, 294–304. DOI: 10.55730/1300-0985.1774
8. Akbaş, M., Okuyucu, C., & Yılmaz, İ.Ö. (2022). Microfacies and stable isotope analyses (δ¹³C and δ¹⁸O) of the upper Serpukhovian–Moscovian carbonates in the Hadim Nappe, southern Turkey: an approach to document the Late Paleozoic Ice Age (LPIA). Facies, 68(3), 1–19. DOI: 10.1007/s10347-022-00649-0
9. Özyurt, M., Kırmacı, M.Z., Yılmaz, İ.Ö., Kandemir, R., & Taslı, K. (2022). Sedimentological and geochemical approaches for determination of the palaeoceanographic and palaeoclimatic conditions of Lower Cretaceous marine deposits in the eastern part of Sakarya Zone, NE Turkey. Carbonates and Evaporites, 37(25), 1–22. DOI: 10.1007/s13146-022-00768-3
10. Yılmaz, İ.Ö., Hoşgör, İ., Altıner, S., Wagreich, M., & Kvaček, J. (2021). First record of late Campanian paleoceanographic and paleoclimatic changes, Arabian Platform, Mazıdağ-Mardin area, SE Turkey. Carnets de Géologie, 21(6), 137–162. DOI: 10.2110/carnets.2021.2106
11. Yıldız, G., & Yılmaz, İ.Ö. (2020). Reservoir heterogeneity of Ordovician sandstone reservoir (Bedinan Formation, SE Turkey): Diagenetic and sedimentological approaches. Marine and Petroleum Geology, 118, 104444. DOI: 10.1016/j.marpetgeo.2020.104444
12. Mülayim, O., Yılmaz, İ.Ö., Özer, S., Sarı, B., & Taslı, K. (2020). A Cenomanian–Santonian rudist-bearing carbonate platform on the northern Arabian Plate, Turkey: facies and sequence stratigraphy. Cretaceous Research, 110, 104414.
13. Wagreich, M., Sames, B., Hart, M., & Yılmaz, İ.Ö. (2020). An introduction to causes and consequences of Cretaceous sea-level changes (IGCP 609). Geological Society, London, Special Publications, 498(1), 1–8. DOI: 10.1144/SP498-2019-156
14. Mülayim, O., Yılmaz, İ.Ö., Sarı, B., Taslı, K., & Wagreich, M. (2020). Cenomanian–Turonian drowning of the Arabian Carbonate Platform, the İnişdere section, Adıyaman, SE Turkey. Geological Society, London, Special Publications, 498, 189–210. DOI: 10.1144/SP498-2018-130
15. Simmons, M.D., Vicedo, V., Yılmaz, İ.Ö., Hoşgör, İ., Mülayim, O., & Sarı, B. (2020). Micropalaeontology, biostratigraphy, and depositional setting of the mid-Cretaceous Derdere Formation at Derik, Mardin, south-eastern Turkey. Journal of Micropalaeontology, 39(2), 203–232.
16. Wolfgring, E., Wagreich, M., Yılmaz, İ.Ö., Liu, S., & Böhm, K. (2020). Late Cretaceous stratigraphy in the Mudurnu–Göynük Basin (Turkey) and inferences on sea-level change in the Late Campanian to Early Maastrichtian. Geological Society, London, Special Publications, 498. DOI: 10.1144/SP498-2018-145
17. Wagreich, M., Sames, B., Hart, M., & Yılmaz, İ.Ö. (2019). An Introduction to Causes and Consequences of Cretaceous Sea-Level Changes (IGCP 609). Geological Society, London, Special Publications, 498. DOI: 10.1144/SP498-2019-156
18. Kvaček, J., Hoşgör, İ., Yılmaz, İ.Ö., & Mendes, M.M. (2019). New Araucarian Conifer from the Late Cretaceous (Campanian–Maastrichtian) of Southeastern Turkey. International Journal of Plant Sciences, 180(6), 597–606. DOI: 10.1086/703525
19. Sturrock, C.P., Catlos, E.J., Miller, N.R., Akgün, A., Fall, A., Gabitov, R.I., Yılmaz, İ.Ö., Larson, T., & Black, K.N. (2017). Fluids along the North Anatolian Fault, Niksar basin, north central Turkey: Insight from stable isotopic and geochemical analysis of calcite veins. Journal of Structural Geology, 101, 58–79. DOI: 10.1016/j.jsg.2017.06.004
20. Wolfgring, E., Wagreich, M., Dinarès-Turell, J., Yılmaz, İ.Ö., & Böhm, K. (2017). Plankton biostratigraphy and magnetostratigraphy of the Santonian–Campanian boundary interval in the Mudurnu–Göynük Basin, northwestern Turkey. Cretaceous Research. DOI: 10.1016/j.cretres.2017.07.006
21. Yılmaz, İ.Ö., Cook, T.D., Hoşgör, İ., Wagreich, M., Rebman, K., & Murray, A.M. (2017). The upper Coniacian to upper Santonian drowned Arabian carbonate platform, the Mardin-Mazıdağ area, SE Turkey: Sedimentological, stratigraphic, and ichthyofaunal records. Cretaceous Research, 84, 153–167. DOI: 10.1016/j.cretres.2017.09.012
22. Yılmaz, İ.Ö., Altıner, D., & Ocakoğlu, F. (2016). Upper Jurassic–Lower Cretaceous depositional environments and evolution of the Bilecik (Sakarya Zone) and Tauride carbonate platforms, Turkey. Palaeogeography, Palaeoclimatology, Palaeoecology, 449, 321–340. DOI: 10.1016/j.palaeo.2016.02.028
23. Sames, B., Wagreich, M., Wendler, J., Haq, B., Melinte-Dobrinescu, M., Hu, X., Wendler, I., & Yılmaz, İ.Ö. (2015). Review: Short-term sea-level changes in a greenhouse world — A view from the Cretaceous. Palaeogeography, Palaeoclimatology, Palaeoecology, 441, 393–411. DOI: 10.1016/j.palaeo.2015.10.045
24. Tüysüz, O., Melinte-Dobrinescu, M., Yılmaz, İ.Ö., Kirici, S., Šv[a]benick[á], L., & Skupien, P. (2015). The Kapanboğazı formation: A key unit for understanding Late Cretaceous evolution of the Pontides, N Turkey. Palaeogeography, Palaeoclimatology, Palaeoecology, 441, 565–581. DOI: 10.1016/j.palaeo.2015.06.028
25. Yılmaz, İ.Ö., Göncüoğlu, M.C., Demiray, G., & Gedik, İ. (2015). An approach to paleoclimatic conditions for Devonian (upper Lochkovian and middle Givetian) ironstone formation, NW Anatolian carbonate platform. Turkish Journal of Earth Sciences, 24, 21–38. DOI: 10.3906/yer-1406-7
26. Hu, X., Zhao, K., & Yılmaz, İ.Ö. (2012). Stratigraphic transition and palaeoenvironmental changes from the Aptian oceanic anoxic event 1a (OAE1a) to the oceanic red bed 1 (ORB1) in the Yenicesihlar section, central Turkey. Cretaceous Research, 38, 40–51.
27. Hu, X., Wagreich, M., & Yılmaz, İ.Ö. (2012). Marine rapid environmental/climatic change in the Cretaceous greenhouse world. Cretaceous Research, 38, 1–6.
28. Yılmaz, İ.Ö., Altıner, D., Tekin, U.K., & Ocakoğlu, F. (2012). The first record of the “Mid-Barremian” Oceanic Anoxic Event and the Late Hauterivian platform drowning of the Bilecik platform, Sakarya Zone, western Turkey. Cretaceous Research, 38, 16–39. DOI: 10.1016/j.cretres.2012.04.010
29. Yılmaz, İ.Ö., Tüysüz, O., Altıner, D., Ocakoğlu, F., & Tekin, U.K. (2010). Cenomanian–Turonian Oceanic Anoxic Event (OAE2) in the Sakarya Zone, northwestern Turkey: Sedimentological, cyclostratigraphic, and geochemical records. Cretaceous Research, 31(2), 207–226. DOI: 10.1016/j.cretres.2009.10.005
30. Yılmaz, İ.Ö. (2008). Cretaceous Pelagic Red Beds and Black Shales (Aptian–Santonian), NW Turkey: Global Oceanic Anoxic and Oxic Events. Turkish Journal of Earth Sciences, 17(2), 263–296.
31. Yılmaz, İ.Ö., & Altıner, D. (2007). Cyclostratigraphy and sequence boundaries of inner platform mixed carbonate-siliciclastic successions (Barremian–Aptian), Zonguldak, NW Turkey. Journal of Asian Earth Sciences, 30, 253–270.
32. Yılmaz, İ.Ö., & Altıner, D. (2006). Cyclic palaeokarst surfaces in Aptian peritidal carbonate successions (Taurides, southwest Turkey): internal structure and response to mid-Aptian sea-level fall. Cretaceous Research, 27(6), 814–827.
33. Yılmaz, İ.Ö., Altıner, D., Vennemann, T., & Satir, M. (2004). Stable isotope evidence for meter-scale sea-level changes in Lower Cretaceous inner platform and pelagic carbonate successions of Turkey. Geologica Carpathica, 55(1), 19–36.
34. Yılmaz, İ.Ö., & Altıner, D. (2001). Use of sedimentary structures in the recognition of sequence boundaries in Upper Jurassic–Upper Cretaceous peritidal carbonates of the Western Taurides, Turkey. International Geology Review, 43(8), 736–753.

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