Dr. Okay Çimen

PUBLICATIONS

 

Note: In order to get pdf files of the publications, please click academia and researchgate links.

 

 

 

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PAPERS

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Çimen, O., Gücer, M.A., Akal, C., Göncüoğlu, M.C., Arslan, M., Simonetti, A., Karaoğlan, F.  2024. Revisiting the depositional age and provenance characteristics of metasedimentary rocks from the basement units in the Central Pontides (N Türkiye): New constraints for tectonic evolution of the southern Black Sea region. Journal of Asian Earth Sciences, 106134. SCI-Expanded

 

Sapancı, O., Tokat, G., Eraslan, N.K., Karakaya, A.O., Gücer, M.A., Çimen, O. 2023. Geochemical and radiometric data for mafic rocks from the Guleman Ophiolite (SE, Turkey): New insights on the geodynamic evolution of the southern Neo-Tethyan ocean. Lithos, 442-443, 107071. SCI-Expanded

 

Çimen, O., Ağrılı, H., Kuebler, C., Simonetti, A., Corcoran, L., Simonetti, S., Çolak, T., İnal, S., Dönmez, C. 2022. Geochemical, isotopic and U-Pb geochronological investigation of the Late Cretaceous Karaçayır carbonatite (Sivas, Turkey): Insights into mantle sources within a post-collisional tectonic setting. Ore Geology Reviews, 141, 104650. SCI-Expanded

 

Çimen, O., Corcoran, L., Kuebler, C., Simonetti, SS., Simonetti, A. 2020. Geochemical, stable (O, C and B) and radiogenic (Sr, Nd, Pb) isotopic data from the Eskişehir-Kızılcaören (NW-Anatolia) and the Malatya-Kuluncak (E-central Anatolia) F-REE-Th deposits, Turkey: Implications for nature of carbonate-hosted mineralization. Turkish Journal of Earth Sciences. 29: 798-814. SCI-Expanded

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Çimen, O. 2020. Geochemical characteristics of the adakite-like Dodurga Pluton (Central Pontides, N Turkey): Implications for Middle Triassic continental arc magmatism in southern Black Sea region. International Journal of Earth Sciences (GR Geologische Rundschau). 109, 809–829. SCI-Expanded

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Çimen, O. 2020. Geochemical characteristics of a pre-Middle Jurassic oceanic crust fragment from the Central Pontides in northern Turkey: Geodynamic implications on intra-oceanic subduction initiation. Geochemistry (Chemie Der Erde). 80 (1), 125535. SCI-Expanded

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Çimen, O., Kuebler, C., Simonetti, SS., Corcoran, L., Mitchell, R., Simonetti, A. 2019. Combined Boron, Radiogenic (Nd, Pb, Sr), Stable (C, O) Isotopic and Geochemical Investigations of Carbonatites From the Blue River Region, British Columbia (Canada): Implications for Mantle Sources and Recycling of Crustal Carbon. Chemical Geology. 529, 119240. SCI-Expanded

 

Gücer, M.A., Arslan, M., Çimen, O., Sherlock, S. 2019. Petrology and 40Ar-39Ar dating of paragneisses from the Devrekani Massif (Central Pontides, Northern Turkey): Implications for the Jurassic high-T metamorphism in an extensional tectonic environment. Journal of Asian Earth Sciences. 181, 103888. SCI-Expanded

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Çimen, O., Kuebler, C., Monaco, B., Simonetti, SS., Corcoran, L., Chen, W., Simonetti, A. 2018. Boron, Carbon, Oxygen and Radiogenic Isotope Investigation of Carbonatite from the Miaoya complex, central China: Evidences for late-stage REE hydrothermal event and mantle source heterogeneity. Lithos. 322, 225-237. SCI-Expanded

 

Çimen, O., Öztüfekçi-Önal, A. 2018. Preliminary geochemical data of the mafic rocks from the Ovacik and Pülümür Ophiolite Zone (Eastern Anatolia, Turkey): Implications for the geodynamic evolution of the northern Neotethyan Ocean. Ofioliti. 43, 2, 103-116. SCI-Expanded

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Çimen, O., Öztüfekçi-Önal, A., Akarsu-Akyol, E. 2018. Assessment of pollution potential of the Hasangazi chromite pit (Tunceli-Turkey): Implications for the natural environment. Environmental Earth Sciences. 77, 199, 1-17. SCI-Expanded

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Çimen, O., Göncüoğlu, M.C., Simonetti, A., Sayıt, K. 2018. New zircon U-Pb LA-ICP-MS ages and Hf isotope data from the Central Pontides: Geological and Geodynamic constraints. Journal of Geodynamics. 116 (23-36). SCI-Expanded

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Çimen, O. 2018. The new findings on the Late Devonian volcanism in the Eastern Taurides (Develi, Kayseri): Preliminary data. Geological Bulletin of Turkey. 61(1), 75-90. (in English)

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Çimen, O., Göncüoğlu, M.C., Simonetti, A., Sayıt, K. 2017. Whole rock geochemistry, Zircon U-Pb and Hf isotope systematics of the Çangaldağ Pluton: Evidences for Middle Jurassic Continental Arc Magmatism in the Central Pontides, Turkey. Lithos. 290-291, 136-158. SCI-Expanded

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Çimen, O., Göncüoğlu, M.C., Sayıt, K. 2016. Geochemistry of the meta-volcanic rocks from the Çangaldağ Complex in Central Pontides: Implications for the Middle Jurassic arc - back - arc system in the Neotethyan Intra - Pontide Ocean. Turkish Journal of Earth Sciences 25(6), 491-512. SCI-Expanded

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Çimen, O., Toksoy Köksal, F., Öztüfekçi Önal, A., Aktağ, A. 2016. Depleted to Refertilized Mantle Peridotites Hosting Chromitites within the Tunceli Ophiolite, Eastern Anatolia (Turkey): Insights on the Back Arc Origin. Ofioliti. Vol. 41 (1), 1-20. SCI-Expanded

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Koç, Ş., Sarı, A., Çimen, O. 2016.  Major and rare earth element contents in sedimentary rocks of the Haymana formation, Ankara, Turkey. Energy Sources, Part A: Recovery, Utilization, and Environmental Effects. 38 (13), 1918-1928. SCI

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Çimen, O., Toksoy-Köksal, F., Öztüfekçi-Önal, A., Örgün-Tutay, Y. 2015. Environmental Contamination of Heavy Metals and Chrysotile Asbestos in the Munzur and Pülümür Streams (Tunceli/Turkey). Ofioliti.  Vol. 40 (1), 27-36. SCI-Expanded

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Çimen, O., Koç, Ş., Sarı, A., 2013. Rare Earth Element (REE) Geochemistry and Genesis of Oil Shales around the Dağhacılar Village (Göynük-Bolu, Turkey). Oil Shale. Vol. 30, No. 3, pp. 419–440. SCI

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INVITED TALKS

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Rare earth elements: Geological and economic potential of the Tauride-Anatolide Platform (Turkey). 2nd Symposium on Geology of the Taurus Belt, General Directorate of Mineral Research and Exploration, Turkey. 30 November 2022.

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Geotectonic importance of Guleman Ophiolite and chromite petrogenesis: New approaches to exploration processes in the light of scientific data.5th Kurultai, Yılmaden Holding Inc., Turkey, 04 November 2022.

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Rare earth elements ecosystem: False facts. Rare earth elements and recovery from waste materials workshop, Istanbul Technical University, Turkey. 01 December 2021.

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Rare earth elements: Current situation and future projection in Turkey. Annual Trainings, Turkish Association of Economic Geologists, Turkey. 14 October 2021.

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The role and importance of critical raw materials in strategic sectors and technologies: Possible opportunities for Turkey. Annual Trainings, Turkish Association of Economic Geologists, Turkey. 30 September 2021.

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CONFERENCE PROCEEDINGS

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Çimen, O., Ağrılı, H.. 2023. Rare Earth Element Deposits: Geological Characteristics and Exploration Strategies. 75th Geological Congress of Turkey with international participation, April 10-14, 2023, Ankara, Turkey.

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Çimen, O., Gücer, M.A., Simonetti, A., Corcoran, L., Karaoğlan, F. 2023. Radiogenic Sr, Nd, Pb Isotope, Zircon U-Pb and Ar-Ar Age Data from the Dodurga Pluton (Central Pontides, Türkiye): New Insights on the Geodynamic Evolution of the Northern Neotethys. 75th Geological Congress of Turkey with international participation, April 10-14, 2023, Ankara, Turkey.

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Çimen, O., Gücer, M.A., Akal, C., Göncüoğlu, M.C., Arslan, M., Simonetti, A., Karaoğlan, F.  2023. Whole Rock Geochemistry and Detrital Zircon U-Pb Age Data from the Söğüt Metamorphites (Central Sakarya, Türkiye): Implications for the Geodynamic Evolution of the Sakarya Composite Terrane. 75th Geological Congress of Turkey with international participation, April 10-14, 2023, Ankara, Turkey.

 

Çimen, O., Gücer, M.A., Akal, C., Göncüoğlu, M.C., Arslan, M., Simonetti, A., Karaoğlan, F.  2022. Whole Rock Geochemistry, Zircon U-Pb and Mica Ar-Ar Age Data from the Sömdiken Metamorphites (Central Sakarya, Türkiye): New Insights on the Geodynamic Evolution of the Tauride-Anatolide Platform. 2nd Symposium on Geology of the Taurus Belt, General Directorate of Mineral Research and Exploration, Turkey. 

 

Çimen, O., Gücer, M.A., Akal, C., Göncüoğlu, M.C., Arslan, M., Simonetti, A., Karaoğlan, F.  2022. Detrital Zircon U-Pb Geochronology and Whole Rock Geochemistry of the Metasediments from the Devrekani, Geme ve Serveçay Complexes (Central Pontides, Turkey): Revisiting the Depositional Ages and Provenances. 74th Geological Congress of Turkey with international participation, 11-15 April 2022, Ankara, Turkey.

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Göncüoğlu, M.C., Çimen, O., Gücer, M.A., Akal, C., Arslan, M., Simonetti, A., Karaoğlan, F. 2022. New Meso-and Neoproterozoic Zircon U/Pb Data From The Crystalline Basement of the Istanbul-Zonguldak Terrane in Safranbolu-Karadere Area: A Non-Gondwanan Provenance?. 74th Geological Congress of Turkey with international participation, 11-15 April 2022, Ankara, Turkey.

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Eraslan, N.K., Sapancı, O., Tokat, G., A.O., Gücer, M.A., Çimen, O. 2022. Petrogenesis of the Chromite Ore-bearing Peridotites from the Guleman Ophiolite (SE, Turkey): Implications for Mantle Source, Melt-Rock Interactions and Tectonic Setting. 74th Geological Congress of Turkey with international participation, 11-15 April 2022, Ankara, Turkey.

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Tokat, G., Sapancı, O., Eraslan, N.K., Karakaya, A.O., Gücer, M.A., Çimen, O. 2022.  Mineral Chemistry and Petrogenesis of the Chromitites from the Guleman Ophiolite (SE, Turkey): Implications for Mantle Source and Tectonic Setting. 74th Geological Congress of Turkey with international participation, 11-15 April 2022, Ankara, Turkey.

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Sapancı, O., Tokat, G., Eraslan, N.K., Karakaya, A.O., Gücer, M.A., Çimen, O. 2022. Whole Rock Geochemistry, Radiogenic Isotope (Sr, Nd) and Zircon U-Pb Systematics of the Mafic Rocks from the Guleman Ophiolite (SE, Turkey): Implications for the Geodynamic Evolution of the Southern Neotethys Ocean. 74th Geological Congress of Turkey with international participation, 11-15 April 2022, Ankara, Turkey.

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Çimen, O. 2021. Rare Earth Element Deposits and Occurrences in Turkey: An Overview of Mineralization Types. International Online Engineering and Natural Sciences Conference (IOCENS'21), 05-07 July 2021, Gümüşhane University. Turkey.

 

Gücer MA, Çimen O, Sipahi F, Akaryalı E, 2021. Field and Petrographic Features of the Akşar Granitoid in the Eastern Pontides (Bayburt, NE-Turkey): Preliminary Results. International Online Engineering and Natural Sciences Conference (IOCENS'21), 05-07 July 2021, Gümüşhane University. Turkey.

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Ağrılı, H., Çolak, T., Çimen, O., Corcoran, L., Kuebler, C., Simonetti, S., Simonetti, A., Çubuk, Y., İnal, S., Ünal, M., Dönmez, C. 2021. Stable and radiogenic isotope systematics of the Karaçayır carbonatite from the Central Anatolian Crystalline Complex (central Turkey): Evidences for mantle source heterogeneity and involvement of recycled crustal carbon within a post-collisional tectonic setting. 73rd Geological Congress of Turkey with international participation, 24-28 May 2021, Ankara, Turkey.

 

Çimen, O. 2021. Adakite-like pre-Jurassic Dodurga Pluton (Central Pontides, N Turkey): Geological and Geochemical Insights into the Tectonic Evolution of the Paleotethyan Ocean. 73rd Geological Congress of Turkey with international participation, 24-28 May 2021, Ankara, Turkey.

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Çimen, O. 2019. Preliminary geochemical data of the cross-cutting dykes from the Devrekani Metaophiolite (Central Pontides, Turkey): Implications for the geodynamic evolution a pre-Middle Jurassic oceanic crust fragment. International Earth Science Colloquium on the Aegean Region” (IESCA), October 7-11, Izmir, Turkey. p. 9.

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Çimen, O., Simonetti, A., Kuebler, C., Corcoran, L. 2019. Radiogenic (Sr, Nd, Pb) and stable (B, O, C) isotope systematics of the Kuluncak F-REE-Th deposit (Malatya-Turkey): Evidences for skarn-type mineralization. 72nd Geological Congess of Turkey. Ankara Turkey. p. 265-266.

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Çimen, O., Kuebler, C., Monaco, B., Simonetti, SS., Corcoran, L., Chen, W., Simonetti, A. 2018. Stable (B, O, C) and radiogenic (Sr, Nd, Pb) isotope signatures of carbonatites from the Miaoya complex, central China: New insights into the mantle source heterogeneity and late-stage REE hydrothermal metasomatism. International participated Cappadocia Geosciences Symposium 24-26 October 2018, Niğde, Turkey. p. 90-91.

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Çimen, O., Göncüoğlu, M.C., Simonetti, A., Sayıt, K. 2018. Inherited zircon U-Pb ages and Hf isotope data from the Middle Jurassic continental magmatism in the Central Pontides (Turkey): Implications on the involvement of Proterozoic and Archean crustal rocks. International participated Cappadocia Geosciences Symposium, 24-26 October 2018, Niğde, Turkey. p. 88-89.

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Çimen, O., Göncüoğlu, M.C., Sayıt, K., Simonetti, A. 2017. A re-evaluation of the geological evolution of the Central Pontides (Turkey). 70th Geological Congess of Turkey. 10-14 April, Ankara, Turkey. p. 28-29.

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Çimen, O., Göncüoğlu, M.C., Simonetti, A., Sayıt, K. 2017. The widespread Middle Jurassic magmatism in the Central Pontides (Turkey): Implications for the geodynamic evolution of the Central Pontides. 70th Geological Congess of Turkey. 10-14 April, Ankara, Turkey. p. 420-421.

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Çimen, O., Göncüoğlu, M.C., Simonetti, A., Sayıt, K. 2016. Zircon U-Pb geochronology, Hf isotopes and whole rock geochemistry of the meta-magmatic rocks from the Çangaldağ Complex (Central Pontides, Turkey). 69th Geological Congress of Turkey. 11-15 April, Ankara. Turkey. p. 268-269.

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Çimen, O., Göncüoğlu, M.C., Sayıt, K., Simonetti, A. 2016. Whole rock geochemistry, zircon U-Pb geochronology and Lu-Hf isotope systematics of the Çangaldağ Pluton (Central Pontides, Turkey). 69th Geological Congress of Turkey. 11-15 April, Ankara. Turkey. p. 148-149.

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Öztüfekçi Önal, A., Çimen O., Toksoy-Köksal, F., Aktağ, A., Önal, A. 2015. Petrogenetic Characteristics of the Chromite Deposits in Tunceli Province (Turkey). Symposium on Eastern Anatolian Geology. 07-11 September, Van, Turkey. p. 152-153.

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Önal, A., Aktağ, A., Toksoy-Köksal F., Çimen, O., Öztüfekçi-Önal, A., 2015. Geological Features of the Chromite Deposits in Tunceli Province.Symposium on Eastern Anatolian Geology. 07-11 September, Van, Turkey. p. 206-207.

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Çimen, O., Sayıt, K., Göncüoğlu, M.C. 2015. Preliminary Geological and Geochemical Data from the Çangaldağ Complex (Kastamonu-Turkey): Implications for the Geodynamic Evolution of the Central Pontides. EGU General Assembly. 12-17 April, Vienna, Austria. 

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Çimen, O., Sayıt, K., Göncüoğlu, M.C., Öztüfekçi-Önal, A., Aktağ, A., 2014. MORB- and SSZ-type mafic rocks from the eastern part of the Ankara-Erzincan-Sevan-Akera Suture Belt: Preliminary geochemical data. Goldschmidt2014. 8-13 June, 2014, Sacramento, USA, p. 428.

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Çimen, O., Sayıt, K., Göncüoğlu, M.C. , Okuyucu, C., 2014. The New Findings on the Mid-Late Paleozoic Volcanism in the Eastern Taurides: Implications for the Geodynamic Evolution of the Anatolide-Tauride Terrane. The 8th International Symposium on Eastern Mediterranean Geology. 13-17 October, Muğla, Turkey. p. 34 

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Çimen, O., Öztüfekçi-Önal, A., Toksoy-Köksal F., Aktağ, A., Önal, A. 2014.  Preliminary Data on the Geochemistry of the Chromites from Tunceli (Eastern-Anatolia). VI. Geochemistry Symposium with International Participation. 14-17 May, Mersin, Turkey. p. 35-36.

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Öztüfekçi-Önal, A., Örgün-Tutay, Y., Önal, A., Aktağ, A., Çimen, O., 2013. The Effects of the Mineralizations and Mining Operations on Water System in Tunceli. 2nd Medical Geology Workshop. 4-6 December, Antalya, Turkey. p. 57-63.

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Aktağ, A., Öztüfekçi-Önal, A., Sançar, T., Önal, A., Çimen, O., 2013. New Petrological Data From the Western Termination of East Anatolian Accretionary Complex (EAAC), Eastern Turkey. EGU General Assembly, 07-12 April, Vienna, Austria.

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Çimen O., Toksoy-Köksal F., Örgün Y, Öztüfekçi-Önal A., 2012. Geochemical Characteristics of Bottom Sediments from Munzur and Pülümür Streams feeding Uzunçayır Dam (Tunceli) and Potential Risks on Water Chemistry. 65. Geological Congress of Turkey, 2-6 April, Ankara. p.140-141

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Çimen, O., Öztüfekçi-Önal A., Toksoy-Köksal F, Akarsu-Akyol E., 2012. Environmental Effects of Hasangazi (Pülümür-Tunceli) Chromite Mine. International Earth Sciences Colloquium on the Aegean Region. 1-5 October, Izmir. p. 180.

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Çimen, O., Sarı, A., Koç, Ş., 2011. Rare Earth Elements Enrichments of Organic Matter Rich Rocks in the South of Dağşeyhler Village. 18th International Petroleum and Natural Gas Congress and Exhibition of Turkey. 11-13 May, Ankara. Turkey. p. 117.

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Yurdagül, E., Sarı, A., Koç, Ş., Çimen, O., Karakuş, A., 2011. Rare Earth Elements (REEs) Enrichments in the Upper Cretaceous Haymana Formation (Haymana/Ankara). 18th International Petroleum and Natural Gas Congress and Exhibition of Turkey. 11-13 May, Ankara. Turkey. p. 185

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