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Alt Kretase çamurtaşlarında organik madde birikimini kontrol eden paleoortamsal faktörler: Karabük bölgesi (Batı Pontidler)

Paleoenvironmental controls on organic matter accumulation in Lower Cretaceous mudstones: Karabük area (Western Pontides)

Zeynep Doner(ISTANBUL TECHNICAL UNIVERSITY)0000-0003-2928-3174
Sayfa
1–18
Yayın Tarihi
2026-01-15
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⚡ TL;DR(1 Cümlede Hızlı Çıkarım)

Bulgular, çamurtaşlarının acı su–tuzlu denizel koşulların egemen olduğu sığ kenar havza–şelf geçiş zonunda çökelmiş olduğunu göstermektedir.

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Amaç & Hipotez:Alt Kretase dönemi, küresel ölçekte önemli petrol ve doğal gaz rezervlerinin oluştuğu ve kaynak kaya gelişiminin yaygın olduğu bir dönemdir.
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Temel Bulgular & Veri:Çalışmada köken-tektonik ortam, paleoiklim, paleotuzluluk, detritik girdi, sedimantasyon hızı, paleoüretkenlik ve paleoredoks koşulları değerlendirilmiştir.
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Sonuç & Katkı:Bulgular, çamurtaşlarının acı su–tuzlu denizel koşulların egemen olduğu sığ kenar havza–şelf geçiş zonunda çökelmiş olduğunu göstermektedir.
🔬Tür:Uygulamalı Anket & Alan Araştırması
📍Kapsam:Genişletilmiş Akademik Örneklem
⚙️Değişkenler:Alt Kretase çamurtaşları · Organik madde zenginleşmesi · İz elementler

Özet

Alt Kretase dönemi, küresel ölçekte önemli petrol ve doğal gaz rezervlerinin oluştuğu ve kaynak kaya gelişiminin yaygın olduğu bir dönemdir. Bu çalışmanın amacı, Batı Pontidler’de Çukurca-Karabük bölgesi civarında yüzeyleyen alt Kretase yaşlı organik madde içeren çamurtaşlarında organik madde birikimini kontrol eden çökelme ortamı koşullarını ortaya koymaktadır. Çalışmada köken-tektonik ortam, paleoiklim, paleotuzluluk, detritik girdi, sedimantasyon hızı, paleoüretkenlik ve paleoredoks koşulları değerlendirilmiştir. Bulgular, çamurtaşlarının acı su–tuzlu denizel koşulların egemen olduğu sığ kenar havza–şelf geçiş zonunda çökelmiş olduğunu göstermektedir. Çökelmede yarı nemli–yarı kurak iklim koşulları ve orta dereceli kimyasal ayrışma etkili olmuştur. Paleoiklim ve değişken paleoüretkenlik faktörlerinin organik madde birikiminde birincil bir rol oynamadığı, oksik–suboksik redoks koşulları altında gelişen epizodik oksijen eksikliğinin organik madde korunmasına katkı sağladığı belirlenmiştir. Sedimantasyon hızındaki dalgalanmalar organik maddeyi hem seyreltmiş hem de oksidatif bozunmayı artırmıştır. Bununla birlikte, organik madde ve iz elementlerin birikimini kontrol eden baskın mekanizmaların tanımlanması, farklı oşinografik süreçlerin eşzamanlı ve karmaşık etkileşimi nedeniyle güçlüğünü korumaktadır.

Abstract

The lower Cretaceous period marks a global interval of extensive source rock development and significant oil-natural gas accumulation. The aim of this study is to reveal the depositional controls on organic matter enrichment in lower Cretaceous organic-bearing mudstones exposed around the Çukurca–Karabük area (western Pontides). In this study, origin, tectonic setting, paleoclimate, paleosalinity, detrital input, sedimentation rate, paleoproductivity, and paleoredox conditions were assessed. The findings indicate that the mudstones were deposited in the shallow marginal basin-shelf transition zone where brackish-saltwater marine conditions dominated. Semi-humid-semi-arid climate conditions and moderate chemical weathering were effective in deposition. It has been determined that paleoclimate and variable paleoproductivity factors do not play a primary role in organic matter accumulation, episodic oxygen deficiency developing under oxic–suboxic redox conditions contributes to the preservation of organic matter. Fluctuations in sedimentation rate both diluted the organic matter and increased oxidative degradation. However, identifying the dominant mechanisms controlling the organic matter accumulation and trace elements remains challenging due to the simultaneous and complex interaction of different oceanographic processes.

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Bu Makaleye Atıf Yap

Doner, Z. (2026). Alt Kretase çamurtaşlarında organik madde birikimini kontrol eden paleoortamsal faktörler: Karabük bölgesi (Batı Pontidler). Niğde Ömer Halisdemir Üniversitesi Mühendislik Bilimleri Dergisi, Cilt: 15, 1–18. https://doi.org/10.28948/ngumuh.1816402

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Kaynakça (145)

  1. D. A. Stow and G. Shanmugam, Sequence of Structures in Fine-Grained Turbidites: Comparison of recent deep-sea and ancient flysch sediments. Sedimentary Geology, 25, 23–42, 1980.
  2. A. C. Aplin and J. H. Macquaker, Mudstone Diversity: Origin and Implications for source, seal, and reservoir properties in petroleum systems. AAPG Bulletin, 95, 2031–2059, 2011. https://doi.org/10.1306/032811101 62
  3. Q. Li, S. Wu, D. Xia, X. You, H. Zhang and H. Lu, Major and trace element geochemistry of the lacustrine organic-rich shales from the Upper Triassic Chang 7 Member in the Southwestern Ordos Basin, China: Implications for paleoenvironment and organic matter accumulation. Marine and Petroleum Geology, 111, 852–867, 2020. https://doi.org/10.1016/j.marpetgeo.2 019.09.003
  4. A. V. Moradi, A. Sarı and P. Akkaya, Geochemistry of the Miocene oil shale (Hançili Formation) in the Çankırı-Çorum Basin, Central Turkey: Implications for paleoclimate conditions, Source–Area weathering, provenance and tectonic Setting. Sedimentary Geology, 341, 289–303, 2016. https://doi.org/10.1016/ j.sedgeo.2016.05.002
  5. B. P. Roser and R. J. Korsch, Determination of Tectonic setting of sandstone-mudstone suites using SiO₂ content and K₂O/Na₂O ratio. The Journal of Geology, 94, 635–650, 1986. https://doi.org/10.1086/ 629071
  6. S. M. McLennan and S. R. Taylor, Sedimentary rocks and crustal evolution: Tectonic Setting and Secular Trends. The Journal of Geology, 99, 1–21, 1991. https: //doi.org/10.1086/629470
  7. H. W. Nesbitt and G. M. Young, Petrogenesis of sediments in the absence of chemical weathering: Effects of abrasion and sorting on bulk composition and mineralogy. Sedimentology, 43, 341–358, 1996. https://doi.org/10.1046/j.1365-3091.1996.d01-12.x
  8. T. Hu, X. Pang, S. Jiang, Q. Wang, T. Xu, K. Lu, C. Huang, Y. Chen and X. Zheng. Impact of paleosalinity, dilution, redox, and paleoproductivity on organic matter enrichment in a saline lacustrine rift basin: A Case Study of Paleogene organic-rich shale in Dongpu depression, Bohai Bay Basin, Eastern China. Energy & Fuels, 32, 5045–5061, 2018. https://doi.org/10.1021/a cs.energyfuels.8b00643
  9. X. Wu, L. Xing, Y. Jiang, X. Zhang, R. Xiang and L. Zhou, High-resolution reconstruction of sedimentary organic matter variability during the holocene in the mud area of the Yellow Sea using multiple organic geochemical proxies. Quaternary International, 503, 178–188, 2019. https://doi.org/10.1016/j.quaint.2018. 10.012
  10. S. Liu, C. Wu, T. Li and H. Wang, Multiple geochemical proxies controlling the organic matter accumulation of the marine-continental transitional shale: a case study of the upper permian longtan formation, western Guizhou, China. Journal of Natural Gas Science and Engineering, 56, 152–165, 2018. https://doi.org/10.1016/j.jngse.2018.06.007
  11. G. J. Demaison and G. T. Moore, Anoxic environments and oil source bed genesis. Organic Geochemistry, 2, 9–31, 1980. https://doi.org/10.1016/0146-6380(80)90 017-0
  12. T. J. Algeo and J. B. Maynard. Trace-element behavior and redox facies in core shales of upper Pennsylvanian Kansas-Type Cyclothems. Chemical Geology, 206, 289–318, 2004. https://doi.org/10.1016/j.chemgeo.20 03.12.009
  13. T. J. Algeo and T. W. Lyons, Mo–total organic carbon covariation in modern anoxic marine environments: ımplications for analysis of paleoredox and paleohydrographic conditions. Paleoceanography, 21, 2006. https://doi.org/10.1029/2004PA001112
  14. S. Wang, X. Jin, Q. Bu, L. Jiao and F. Wu, Effects of Dissolved Oxygen Supply Level on Phosphorus Release from Lake Sediments. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 316, 245–252, 2008. https://doi.org/10.1016/j.colsurfa.200 7.09.007
  15. Z. Doner, M. Kumral, I.H. Demirel and Q. Hu, Geochemical characteristics of the silurian shales from the central taurides, southern turkey: organic matter accumulation, preservation and depositional environment modeling. Marine and Petroleum Geology, 102, 155–175, 2019. https://doi.org/10.1016/ j.marpetgeo.2018.12.042
  16. M. A. Arthur and B. B. Sageman, Marine shales: depositional mechanisms and environments of ancient deposits. Annual Review of Earth and Planetary Sciences, 22, 499–551, 1994.
  17. B. B. Sageman, A. E. Murphy, J. P. Werne and C. A. Ver Straeten, D. J. Hollander, T. W. Lyons, A tale of shales: the relative roles of production, decomposition, and dilution in the accumulation of organic-rich strata, Middle–Upper Devonian, Appalachian Basin. Chemical Geology, 195, 229–273, 2003. https://doi. org/10.1016/S0009-2541(02)00397-2
  18. Tenger, W. Liu, Y. Xu and J. Chen, Comprehensive geochemical ıdentification of highly evolved marine carbonate rocks as hydrocarbon-source rocks as exemplified by the Ordos basin. Science in China Series D, 49, 384–396, 2006. https://doi.org/10.1007/ s11430-006-0384-7
  19. Q. Liang, X. Zhang, J. Tian, X. Sun and H. Chang. Geological and geochemical characteristics of marine-continental transitional shale from the lower permian taiyuan formation, taikang uplift, southern north China Basin. Marine and Petroleum Geology, 98, 229–242, 2018. https://doi.org/10.1016/j.marpetgeo.2018.08.02 7
  20. C. Jin, C. Li, T. J. Algeo, S. Wu, M. Cheng, Z. Zhang and W. Shi, Controls on organic matter accumulation on the Early-Cambrian western Yangtze Platform, south China. Marine and Petroleum Geology, 111, 75–87, 2020. https://doi.org/10.1016/j.marpetgeo.2019.0 8.005
  21. Y. Nie, X. Fu, J. Liang, H. Wei, Z. Chen, F. Lin, S. Zeng, Y. Wu, Y. Zou and A. Mansour. The Toarcian oceanic anoxic event in a shelf environment (Eastern Tethys): Implications for weathering and redox conditions. Sedimentary Geology, 455, 106476, 2023. https://doi.org/10.1016/j.sedgeo.2023.106476
  22. C. Diessel, R. Boyd, J. Wadsworth, D. Leckie and G. Chalmers, On balanced and unbalanced accommodation/peat accumulation ratios in the Cretaceous coals from Gates Formation, western Canada, and their sequence-stratigraphic significance. International Journal of Coal Geology, 43, 143–186, 2000. https://doi.org/10.1016/S0166-5162(99)00058-0
  23. R. Tyson, Sedimentation rate, dilution, preservation and total organic carbon: some results of a modelling study". Organic Geochemistry, 32, 333–339, 2001. https://doi.org/10.1016/S0146-6380(00)00161-3
  24. X. Ding, G. Liu, M. Zha, Z. Huang, C. Gao, X. Lu, M. Sun, Z. Chen and X. Liuzhuang, Relationship between total organic carbon content and sedimentation rate in ancient lacustrine sediments, a case study of Erlian Basin, northern China. Journal of Geochemical Exploration, 149, 22–29, 2015. https://doi.org/10.101 6/j.gexplo.2014.11.004
  25. Y. Chen, Y. Wang, M. Guo, H. Wu, J. Li, W. Wu and J. Zhao, Differential enrichment mechanism of organic matters in the marine-continental transitional shale in northeastern Ordos Basin, China: Control of sedimentary environments. Journal of Natural Gas Science and Engineering, 83, 103625, 2020. https:// doi.org/10.1016/j.jngse.2020.103625
  26. D. J. Ross and R. M. Bustin, Investigating the use of sedimentary geochemical proxies for paleoenvironment ınterpretation of thermally mature organic-rich strata: examples from the Devonian–Mississippian Shales, Western Canadian Sedimentary Basin. Chemical Geology, 260, 1–19, 2009. https://doi. org/10.1016/j.chemgeo.2008.10.027
  27. Y. Nie, X. Fu, X. Liu, H. Wei, S. Zeng, F. Lin, Y. Wan and C. Song, Organic matter accumulation mechanism under global/regional warming: Insight from the Late Barremian Calcareous Shales in the Qiangtang Basin (Tibet). Journal of Asian Earth Sciences, 241, 105456, 2023. https://doi.org/10.1016/j.jseaes.2022.105456
  28. N. Tribovillard, T. J. Algeo, T. Lyons and A. Riboulleau, Trace metals as paleoredox and paleoproductivity proxies: An Update. Chemical Geology, 232, 12–32, 2006. https://doi.org/10.1016/j.chemgeo.2006.02.012
  29. P. Ma, L. Wang, C. Wang, X. Wu and Y. Wei, Organic-Matter accumulation of the lacustrine Lunpola oil shale, central Tibetan Plateau: Controlled by the Paleoclimate, Provenance, and Drainage System. International Journal of Coal Geology, 147, 58–70, 2015. https://doi.org/10.1016/j.coal.2015.06.0 11
  30. S. Li, Z. Zhou, H. Nie, M. Liu, F. Meng, B., Shen, X. Zhang, X. Zhaodong and S. Zhang, Organic matter accumulation mechanisms in the Wufeng-Longmaxi shales in western Hubei Province, China and paleogeographic implications for the uplift of the Hunan-Hubei Submarine high. International Journal of Coal Geology, 270, 104223, 2023. https://doi.org/10. 1016/j.coal.2023.104223
  31. Z. Caineng, Y. Zhi, J. W. Cui, R.K. Zhu, L. H. Hou, S. Z. Tao, X. J. Yuan, S. T. Wu, S. H. Lin and L. Wang, Formation mechanism, geological characteristics and development strategy of nonmarine shale oil in China. Petroleum Exploration and Development, 40 (1), 15–27, 2013. https://doi.org/10.1016/S1876-3804(13)600 02-6
  32. F. Hao, H. Zou and Y. Lu, Mechanisms of shale gas storage: implications for shale gas exploration in China. AAPG Bull. 97 (8), 1325–1346, 2013. https:// doi.org/10.1306/02141312091
  33. H. Klemme and G. F. Ulmishek, Effective petroleum source rocks of the world: stratigraphic distribution and controlling depositional factors. AAPG Bulletin, 75, 1809–1851, 1991. https://doi.org/10.1306/0C9B2 A47-1710-11D7-8645000102C1865D
  34. A. S. Gale, S. Culver and P. Rawson, The Cretaceous world, Biotic response to global change: the last. 145 4-19, 2000. https://doi.org/10.1017/CBO9780511535 505.003
  35. W. T. Fratschner, Azdavay, Bartın, Kumluca, Kurucaşile, Ulus bölgelerinde 19-Mayıs- 24 Ekim arasında yapılan etüdlere dair ilk rapor (Rapor No. 1960). MTA Kurumsal Raporu, Ankara, 1952.
  36. W. T. Fratschner, Azdavay sondajlarına ait rapor ve mutalaa (Rapor No. 2408). MTA Kurumsal Raporu, Ankara, 1956.
  37. A. Güven, Stratigraphy and sedimentology of Eocene formations, Karabük Area, Turkey. Ph.D. Thesis, University of Wales, Swansea, 1977.
  38. S. Saner, İ. Taner, Z. Aksoy, M. Siyako and K.A. Bürkan, Karabük-Safranbolu bölgesinin jeolojisi (Rap. No: 1322). TPAO Kurumsal Raporu, Ankara, 1979.
  39. S. Saner, İ. Taner, Z. Aksoy and M. Siyako, K. A. Bürkan, Safranbolu havzasının jeolojik yapısı ve Tersiyer paleocoğrafyası. Türkiye 5. Petrol Kongresi, s. 111- 122, Ankara, 1980.
  40. O. Yılmaz, Daday-Devrekani masifi kuzeydoğu kesimi litostratigrafi birimleri ve tektoniği. Yerbilimleri Dergisi, 5 (5/6), 101-131, 1980.
  41. M. Aydın and Ö. Sahintürk, Cide-Ulus-Azdavay-Araç-Daday-Karadere ve dolaylarının jeolojisi (Rapor No. 1644). TPAO Kurumsal Raporu, Ankara, 1982.
  42. M. Aydın, Ö. Sahintürk and Y. Özçelik, Araç-Daday-Karadere ve dolaylarının jeolojisi ve hidrokarbon olanakları (Rapor No. 1948). TPAO Kurumsal Raporu, Ankara, 1984.
  43. M. Aydın, H. S. Serdar, Ö. Şahintürk, Y. Özçelik, R. Çokugras, İ. Akarsu, A. Üngür ve S. Kasar, Ballıdag-Çangaldagı (Kastamonu) arasındaki bölgenin Jeolojisi. TJK Bülteni, 29, 2, 1-16, 1986.
  44. A. Koçyiğit, Karabük-Safranbolu Tersiyer havzası kuzey kenarının stratigrafisi ve niteliği. TJK. Bülteni, 30-1, 61-69, 1987.
  45. M. Y. Barkurt, E. Bilginer, Ş. Pehlivan, S. Örçen, B. Can, Z. Dağar, C. Bilgi., M. Karabıyıkoğlu ve T. Süer, Kastamonu-Araç güneyinin jeolojisi (Rapor No: 9079), MTA Kurumsal Raporu, Ankara, 1990.
  46. A. S. Derman, Batı Karadeniz bölgesinin Geç Jura-Erken Kretase evrimi. 8. Petrol Kongresi Proceedings, 328-339, 1990.
  47. A. S. Derman, Cretaceous megabreccias and other mass flow deposits in the eastern Ulus Basin, Western Black Sea Region of Turkey. Ph.D. Thesis, METU, The Grad. School of Naturel and Aplied Sciences, Ankara, 1995.
  48. A. S. Derman ve Y. Özçelik, Batı Karadeniz Bölgesi’ndeki Paleozoik birimlerinin stratigrafisi, sedimantolojik özellikleri ve yörenin muhtemel paleocoğrafik evrimi. A. Suat Erk Jeoloji Sempozyumu, Bildiriler, Ankara Üniversitesi Fen Fakültesi Jeoloji Mühendisliği Bölümü, 2-5, 1993.
  49. Y. Özçelik ve A. Çaptuğ, Amasra Dogusu - Cide arasında kalan alanda yapılan saha gözlemleri ve revizyon çalısmaları (Rapor No. 2789). TPAO Kurumsal Raporu, Ankara, 1990.
  50. O. Tüysüz, Geology of the Cretaceous sedimentary basins of the Western Pontides. Geological Journal, 34 (1‐2), 75-93, 1999. https://doi.org/10.1002/(SICI)109 9-1034(199901/06)34:1/2 3.0.CO;2-S
  51. Ş. Şen, Karabük-Safranbolu havzasının sedimanter analizi ve bölgedeki diğer çökel havzalarla ilişkileri. Doktora tezi, İstanbul Üniversitesi Fen Bilimleri Enstitüsü, Jeoloji Mühendisliği Anabilim Dalı, 195, İstanbul, 2001.
  52. O. Tüysüz, A. Aksay ve E. Yiğitbaş, Batı Karadeniz bölgesi litostatigrafi birimleri. MTA Stratigrafi Komitesi, Litostatigrafi Birimleri Serisi, 1.92, 2004.
  53. M. F. Uğuz ve M. Sevin, Türkiye Jeoloji Haritaları, Kastamonu F30 Paftası (Rapor No. 144). Maden Tetkik Arama Jeoloji Etüdleri Dairesi yayınları, Ankara, 2011.
  54. A. S. Derman and Y. H. İztan, Results of geochemical analyses of seeps and potential source rocks from Northern Turkey and Turkish Black Sea. AAPG Memoir, 68, 313-330, 1997. https://doi.org/10.1306 /M68612C16
  55. O. Harput, Batı Karadeniz Bölgesi tortullarının kaynak kaya ve olgunlaşma yöntemiyle incelenmesi. Doktora tezi, Hacettepe Üniversitesi, Fen Bilimleri Enstitüsü, Ankara, 1997.
  56. B. O. Harput, I. H. Demirel, A. I. Karayigit, M. Aydin, O. Sahinturk and R. M. Bustin, Preliminary hydrocarbon source rock assessment of the Paleozoic and Mesozoic formations of the Western Black Sea region of Turkey. Energy sources, 21(10), 945-956, 1999. https://doi.org/10.1080/00908319950014317
  57. S. Sen, Allochthonous blocks and thrust tectonics effects to petroleum exploration in the Ulus Basin, Western Black Sea of Turkey. In AAPG Annual Convention and Exhibition, 2017.
  58. Ş. Şen, Source rock assessment of the Lower Cretaceous Ulus Formation of NW Turkey: Implication to petroleum exploration. Petroleum Science and Technology, 36(22), 1891-1897, 2018. https://doi.org/10.1080/10916466.2018.1517168
  59. O. Mammadov, Evalution of organic matters and hydrocarbon potential in lower cretaceous mudstones: From Ulus and Kilimli formations, Northwestern part of pontides, Turkey. Yüksek Lisans Tezi, İstanbul Teknik Üniversitesi Fen Bilimleri Enstitüsü, Jeoloji Mühendisliği Ana Bilim Dalı, 121, İstanbul, 2017.
  60. W. Dean, O. Monod, R. Rickards, O. Demir and P. Bultynck, Lower Palaeozoic stratigraphy and palaeontology, Karadere–Zirze area, Pontus mountains, northern Turkey. Geological Magazine, 137, 2000, 555-582. https://doi.org/10.1017/S001675 6800004635
  61. N. Özgül, Stratigraphy and some structural features of the İstanbul Paleozoic, Turkish Journal of Earth Sciences, 21 817-866, 2012. https://doi.org/10.3906 /yer-1111-6
  62. F. Chen, W. Siebel, M. Satir, M. Terzioğlu and K. Saka, Geochronology of the Karadere basement (NW Turkey) and implications for the geological evolution of the Istanbul zone, International Journal of Earth Sciences. 91 469-481, 2002. https://doi.org/10.1007/s 00531-001-0239-6
  63. R. Akdoğan, A. I. Okay, G. Sunal, G. Tari, G. Meinhold and A. R. Kylander-Clark, Provenance of a large Lower Cretaceous turbidite submarine fan complex on the active Laurasian margin: Central Pontides, northern Turkey, Journal of Asian Earth Sciences, 134, 309-329, 2017. http://dx.doi.org/10.10 16/j.jseaes.2016.11.028
  64. P. Ayda Ustaömer, R. Mundil and P. R. Renne, U/Pb and Pb/Pb zircon ages for arc‐related intrusions of the Bolu Massif (W Pontides, NW Turkey): evidence for Late Precambrian (Cadomian) age, Terra Nova, 17, 215-223, 2005. https://doi:10.1111/j.1365-3121.2005. 00594.x
  65. S. Y. Şahin, Y. Güngör, N. Aysal and S. Öngen, Istranca ve İstanbul Zonları (KB Türkiye) İçerisinde Yüzeylenen Granitoyidlerin Jeokimyası ve SHRIMP Zirkon U-Pb Yaşlandırması, içinde: Türkiye Jeoloji Kurultayı, Bidiri Özleri, MTA Ankara, 2009: ss. 598-599.
  66. A. I. Okay, G. Sunal, S. Sherlock, D. Altıner, O. Tüysüz, A. R. Kylander‐Clark and M. Aygül, Early Cretaceous sedimentation and orogeny on the active margin of Eurasia: Southern Central Pontides, Turkey. Tectonics, 32, 1247-1271, 2013. https://doi.org/10.100 2/tect.20077
  67. E. Timur ve A. Aksay, Türkiye Jeoloji Haritaları, Zonguldak F29 Paftası (Rapor No. 30), Maden Tetkik Arama Jeoloji Etüdleri Dairesi yayınları., Ankara, 2002.
  68. A. Okay, M. Satir and W. Siebel, Pre-Alpide Palaeozoic and Mesozoic orogenic events in the Eastern Mediterranean region, 2006. https://doi.org/10.1144/GSL.MEM.2006.032.01.23
  69. E. Yiğitbaş, A. Elmas and Y. Yïlmaz, Pre‐Cenozoic tectono‐stratigraphic components of the western pontides and their geological evolution. Geological Journal, 34 55-74, 1999. https://doi.org/10.1002/(SIC I)1099-1034(199901/06)34:1/2 3.0. CO;2-0
  70. A. M. C. Şengör and Y. Yılmaz, Tethyan evolution of Turkey: a plate tectonic approach. Tectonophysics 75, 181–241, 1981. https://doi.org/10.1016/0040-1951(81 )90275-4
  71. N. Görür, A. M. C. Şengör, R. Akkök ve Y. Yılmaz, Pontidlerde Neo-Tetis' in kuzey kolunun açılmasına ilişkin sedimentolojik veriler. Türkiye Jeoloji Kurumu Bülteni, 26 (1), 11-20, 1983.
  72. N. Görür, Timing of opening of the Black Sea basin. Tectonophysics, 147 (3-4), 247-262, 1988. https://doi. org/10.1016/0040-1951(88)90189-8
  73. A. I. Okay and A. M. Nikishin, Tectonic evolution of the southern margin of Laurasia in the Black Sea region. International Geology Review, 57(5-8), 1051-1076, 2015. https://doi.org/10.1080/00206814.2015.1 010609
  74. İ. Ketin ve A. Gümüş, Sinop-Ayancık güneyinde üçüncü bölgeye dahil sahaların jeolojisi hakkında rapor (2. Kısım: Jura ve Kretase formasyonlarının etüdü), Turkish Petroleum Co. Internal Report, 288 33, 1963.
  75. R. L. Cullers, The geochemistry of shales, siltstones and sandstones of Pennsylvanian–Permian age, Colorado, USA: implications for provenance and metamorphic studies. Lithos, 51 181-203, 2000. https://doi.org/10.1016/S0301-9268(00)00090-5
  76. J. Armstrong-Altrin and S. P. Verma, Critical evaluation of six tectonic setting discrimination diagrams using geochemical data of Neogene sediments from known tectonic settings. Sedimentary Geology. 177, 115-129, 2005. https://doi.org/10.1016/j.sedgeo.2005.02.004
  77. E. A. Abou El-Anwar, Mineralogical, petrographical, geochemical, diageneses and provenance of the cretaceous black shales, Duwi formation at Quseir-Safaga, Red Sea, Egypt. Egyptian Journal of Petroleum, 26, 915-926, 2017. https://doi.org/10.1016 /j.ejpe.2016.06.005
  78. S. McLennan, S. Hemming, D. McDaniel and G. Hanson, Geochemical approaches to sedimentation, provenance, and tectonics, 1993. https://doi.org/10.11 30/SPE284-p21
  79. K.-I. Hayashi, H. Fujisawa, H. D. Holland and H. Ohmoto, Geochemistry of∼ 1.9 Ga sedimentary rocks from northeastern Labrador, Canada. Geochimica et Cosmochimica Acta, 61 4115-4137, 1997. https://doi. org/10.1016/S0016-7037(97)00214-7
  80. S. Wang, X. Huang and J. Tuo, Evolutional characteristics and their paleoclimate significance of trace elements in the Hetaoyuan Formation, Biyang depression. Acta Sedimentologica Sinica, 15, 65-70, 1997.
  81. A. K. Adegoke, W. H. Abdullah, M. H. Hakimi and B. M. S. Yandoka, Geochemical characterisation and organic matter enrichment of Upper Cretaceous Gongila shales from Chad (Bornu) Basin, northeastern Nigeria: Bioproductivity versus anoxia conditions. Journal of Petroleum Science and Engineering, 135 73-87, 2015. http://dx.doi.org/10.1016/j.petrol.2015.08.0 12
  82. J. Jia, Z. Liu, A. Bechtel, S. A. Strobl and P. Sun, Tectonic and climate control of oil shale deposition in the Upper Cretaceous Qingshankou Formation (Songliao Basin, NE China). International Journal of Earth Sciences, 102 1717-1734, 2013. https://doi.org/ 10.1007/s00531-013-0903-7
  83. H. Chang, Z. An, F. Wu, Z. Jin, W. Liu and Y. Song, A Rb/Sr record of the weathering response to environmental changes in westerly winds across the Tarim Basin in the late Miocene to the early Pleistocene. Palaeogeography, Palaeoclimatology, Palaeoecology, 386 364-373, 2013. https://doi.org/10. 1016/j.palaeo.2013.06.006
  84. D. K. Roy and B. P. Roser, Climatic control on the composition of Carboniferous–Permian Gondwana sediments, Khalaspir basin, Bangladesh. Gondwana Research, 23 1163-1171, 2013. https://doi.org/10.101 6/j.gr.2012.07.006
  85. J. Cao, M. Wu, Y. Chen, K. Hu, L. Bian, L. Wang and Y. Zhang, Trace and rare earth element geochemistry of Jurassic mudstones in the northern Qaidam Basin, northwest China. Geochemistry, 72, 245-252, 2012. https://doi.org/10.1016/j.chemer.2011.12.002
  86. H. W. Nesbitt and G. M. Young, Formation and diagenesis of weathering profiles. The Journal of Geology, 97, 129-147, 1989. https://doi.org/10.1086/6 29290
  87. H. W. Nesbitt and G. M. Young, Early Proterozoic climates and plate motions inferred from major element chemistry of lutites. Nature, 299 715-717, 1982.
  88. W. He, S. Tao, L. Hai, R. Tao, X. Wei and L. Wang, Geochemistry of the tanshan oil shale in jurassic coal measures, western ordos basin: implications for sedimentary environment and organic matter accumulation. Energies, 15 8535, 2022. https://doi. org/10.3390/en15228535
  89. L. Zhao, Y. Li, C. Zou, S. Zhao and C. Wu, Paleoenvironmental characteristics and organic matter enrichment mechanisms of the upper Ordovician-lower Silurian organic-rich black shales in the Yangtze foreland basin, South China. Frontiers in Earth Science, 11 1237495, 2023. https://doi.org/10.3389/fe art.2023.1237495
  90. C. M. Fedo, G. M. Young and H. W. Nesbitt, Paleoclimatic control on the composition of the Paleoproterozoic Serpent Formation, Huronian Supergroup, Canada: a greenhouse to icehouse transition. Precambrian Research, 86 201-223, 1997. https://doi.org/10.1016/S0301-9268(97)00049-1
  91. H. W. Nesbitt and G. M. Young, Prediction of some weathering trends of plutonic and volcanic rocks based on thermodynamic and kinetic considerations, Geochimica et cosmochimica acta, 48, 1523-1534, 1984. https://doi.org/10.1016/0016-7037(84)90408-3
  92. C. Kasanzu, M. A. Maboko and S. Manya, Geochemistry of fine-grained clastic sedimentary rocks of the Neoproterozoic Ikorongo Group, NE Tanzania: Implications for provenance and source rock weathering. Precambrian Research, 164, 201-213, 2008. https://doi.org/10.1016/j.precamres.2008.04.00 7
  93. S. Han, Y. Zhang, J. Huang, Y. Rui and Z. Tang, Elemental geochemical characterization of sedimentary conditions and organic matter enrichment for Lower Cambrian shale formations in Northern Guizhou, South China. Minerals, 10, 793, 2020. https://doi.org/10.3390/min10090793
  94. S.R. Taylor and S.M. McLennan, The continental crust: its composition and evolution, 1985.
  95. R. Cox, D.R. Lowe and R. Cullers, The influence of sediment recycling and basement composition on evolution of mudrock chemistry in the southwestern United States. Geochimica et Cosmochimica Acta, 59 2919-2940, 1995. https://doi.org/10.1016/0016-7037 (95)00185-9
  96. L. Feng, X. Chu and Q. Zhang, CIA (chemical index of alteration) and its applications in the Neoproterozoic clastic rocks, Earth Science Frontiers, 10, 539-544, 2003.
  97. B. Zhang, P. B. Wignall, S. Yao, W. Hu and B. Liu, Collapsed upwelling and intensified euxinia in response to climate warming during the Capitanian (Middle Permian) mass extinction. Gondwana Research. 89, 31-46, 2021. https://doi.org/10.1016/j.gr.2020.09.003
  98. D. Yan, D. Chen, Q. Wang and J. Wang, Large-scale climatic fluctuations in the latest Ordovician on the Yangtze block, south China. Geology, 38 599-602, 2010. https://doi.org/10.1130/G30961.1
  99. S. Zeng, J. Wang, X. Fu, W. Chen, X. Feng, D. Wang, C. Song and Z. Wang, Geochemical characteristics, redox conditions, and organic matter accumulation of marine oil shale from the Changliang Mountain area, northern Tibet, China. Marine and Petroleum Geology, 64, 203-221, 2015. https://doi.org/10.1016/j.marpetge o.2015.02.031
  100. P. Wignall and R. Newton, Black shales on the basin margin: a model based on examples from the Upper Jurassic of the Boulonnais, northern France, Sedimentary Geology, 144, 335-356, 2001. https://doi. org/10.1016/S0037-0738(01)00125-7
  101. D. J. Wronkiewicz and K. C. Condie, Geochemistry of Archean shales from the Witwatersrand Supergroup, South Africa: source-area weathering and provenance, Geochimica et Cosmochimica Acta. 51, 2401-2416, 1987. https://doi. org/10.1016/0016-7037(87)90293-6
  102. R. V. Tyson and T. H. Pearson, Modern and ancient continental shelf anoxia: an overview, Geological Society, London, Special Publications, 58, 1-24, 1991. https://doi.org/10.1144/GSL.SP.1991.058.01.01
  103. T. J. Algeo and C. Li, Redox classification and calibration of redox thresholds in sedimentary systems. Geochimica et Cosmochimica Acta, 287, 8-26, 2020. https://doi.org/10.1016/j.gca.2020.01.055
  104. B. Jones, D. A. Manning, Comparison of geochemical indices used for the interpretation of palaeoredox conditions in ancient mudstones. Chemical Geology, 111, 111-129, 1994. https://doi.org /10.1016/0009-2541(94)90085-X
  105. T. J. Algeo, K. Kuwahara, H. Sano, S. Bates, T. Lyons, E. Elswick, L. Hinnov, B. Ellwood, J. Moser and J. B. Maynard, Spatial variation in sediment fluxes, redox conditions, and productivity in the Permian–Triassic Panthalassic Ocean. Palaeogeography, Palaeoclimatology, Palaeoecology, 308, 65-83, 2011. http://dx.doi.org/10.1016/j.palaeo.2 010.07.007
  106. S. Zhang, C. Liu, Z. Fan, H. Liang, J. Gao, H. Song, W. Dang, L. Zhang and Y. Gao, Paleoenvironmental Conditions and Shale Oil Potential of the Carboniferous Ha’erjiawu Formation in the Santanghu Basin, NW China. Processes, 11, 2209, 2023. https://doi.org/10.3390/pr11072209
  107. T. J. Algeo and J. Liu, A re-assessment of elemental proxies for paleoredox analysis, 2020. https://doi.org/10.1016/j.chemgeo.2020.119549
  108. P. B. Wignall and R. J. Twitchett, Oceanic anoxia and the end Permian mass extinction. Science, 272, 1155-1158, 1996. https://doi.org/10.1126/science.272.5265.1155
  109. H. Kimura and Y. Watanabe, Oceanic anoxia at the Precambrian-Cambrian boundary. Geology, 29, 995-998, 2001. https://doi.org/10.1130/0091-7613(2001)0 29 2.0.CO;2
  110. C. Scott and T. W. Lyons, Contrasting molybdenum cycling and isotopic properties in euxinic versus non-euxinic sediments and sedimentary rocks: Refining the paleoproxies, Chemical Geology, 324, 19-27, 2012. https://doi.org/10.1016/j.chemgeo.2012. 05.012
  111. T. J. Algeo and N. Tribovillard, Environmental analysis of paleoceanographic systems based on molybdenum–uranium covariation. Chemical Geology, 268, 211-225, 2009. https://doi.org/10.1016 /j.chemgeo.2009.09.001
  112. N.-P. Tribovillard, A. Desprairies, E. Lallier-Vergès, P. Bertrand, N. Moureau, A. Ramdani and L. Ramanampisoa, Geochemical study of organic-matter rich cycles from the Kimmeridge Clay Formation of Yorkshire (UK): productivity versus anoxia. Palaeogeography, Palaeoclimatology, Palaeoecology. 108, 165-181, 1994. https://doi.org/10.1016/0031-01 82(94)90028-0
  113. T. J. Algeo and E. Ingall, Sedimentary Corg: P ratios, paleocean ventilation, and Phanerozoic atmospheric pO2. Palaeogeography, Palaeoclimatology, Palaeoecology, 256 130-155, 2007. http://dx.doi.org/10.1016/j.palaeo.2007.02.029
  114. S. D. Schoepfer, J. Shen, H. Wei, R. V. Tyson, E. Ingall and T. J. Algeo, Total organic carbon, organic phosphorus, and biogenic barium fluxes as proxies for paleomarine productivity, Earth-Science Reviews, 149, 23-52, 2015. https://doi.org/10.1016/j.earscirev. 2014.08.017
  115. Y. Zhang, C. Lyu, X. Gao, Z. Dang, Z. Sun, Q. Zhou and G. Chen, Geochemical Characteristics and Organic Matter Accumulation of Wufeng‐Longmaxi Shales in the Southeast of the Sichuan Basin of South China. Geofluids, 7360065, 2022. https://doi.org/10.11 55/2022/7360065
  116. A. Mansour and M. Wagreich, Earth system changes during the cooling greenhouse phase of the Late Cretaceous: Coniacian-Santonian OAE3 subevents and fundamental variations in organic carbon deposition. Earth-Science Reviews, 229, 104022, 2022. https://doi.org/10.1016/j.earscirev.202 2.104022
  117. H. Dill, Metallogenesis of early Paleozoic graptolite shales from the Graefenthal Horst (northern Bavaria-Federal Republic of Germany). Economic Geology, 81, 889-903, 1986. https://doi.org/10.2113/ gsecongeo.81.4.889
  118. X. Tang, J. Zhang, Y. Liu, C. Yang, Q. Chen, W. Dang and P. Zhao, Geochemistry of organic matter and elements of black shale during weathering in Northern Guizhou, Southwestern China: Their mobilization and inter-connection. Geochemistry, 78, 140-151, 2018. https://doi.org/10.1016/j.chemer.2017.08.002
  119. H. Cao, W. Guo, X. Shan, L. Ma and P. Sun, Paleolimnological environments and organic accumulation of the Nenjiang formation in the southeastern Songliao Basin, China., Oil Shale, 32, 2015. https://doi.org/10.3176/oil.2015.1.02
  120. S. Tao, Y. Xu, D. Tang, H. Xu, S. Li, S. Chen, W. Liu, Y. Cui and M. Gou, Geochemistry of the Shitoumei oil shale in the Santanghu Basin, Northwest China: Implications for paleoclimate conditions, weathering, provenance and tectonic setting. International Journal of Coal Geology, 184 42-56, 2017. https://doi.org/10.1016/j.coal.2017.11.007
  121. W. Wei and T. J. Algeo, Elemental proxies for paleosalinity analysis of ancient shales and mudrocks, Geochimica et Cosmochimica Acta. 287, 341-366, 2020. https://doi.org/10.1016/j.gca.2019.06.034
  122. F. Campbell and G. Williams, Chemical composition of shales of Mannville group (lower Cretaceous) of central Alberta, Canada, AAPG Bulletin. 49, 81-87, 1965. https://doi.org/10.1306/A66 334EA-16C0-11D7-8645000102C1865D
  123. X. Zhang, Z. Gao, T. Fan, J. Xue, W. Li, H. Zhang and F. Cao, Element geochemical characteristics, provenance attributes, and paleosedimentary environment of the Paleogene strata in the Lenghu area, northwestern Qaidam Basin, Journal of Petroleum Science and Engineering, 195,107750, 2020. https://doi.org/10.1016/j.petrol.2020.107750
  124. M. N. Remírez and T. J. Algeo, Paleosalinity determination in ancient epicontinental seas: A case study of the T-OAE in the Cleveland Basin (UK). Earth-Science Reviews, 201 103072, 2020. https://doi. org/10.1016/j.earscirev.2019.103072
  125. L. Tang, Y. Song, S. Jiang, Z. Jiang, Z. Li, Y. Yang, X. Li and L. Xiao, Organic matter accumulation of the Wufeng-Longmaxi shales in southern Sichuan Basin: Evidence and insight from volcanism. Marine and Petroleum Geology, 120, 104564, 2020. https:// doi.org/10.1016/j.marpetgeo.2020.104564
  126. J. Dymond, E. Suess and M. Lyle, Barium in deep‐sea sediment: A geochemical proxy for paleoproductivity. Paleoceanography, 7, 163-181, 1992. https://doi.org/10.1029/92PA00181
  127. R. W. Murray and M. Leinen, Chemical transport to the seafloor of the equatorial Pacific Ocean across a latitudinal transect at 135 W: tracking sedimentary major, trace, and rare earth element fluxes at the Equator and the Intertropical Convergence Zone. Geochimica et Cosmochimica Acta, 57, 4141-4163, 1993. https://doi.org/10.1029/93PA02195
  128. D. Yan, H. Wang, Q. Fu, Z. Chen, J. He and Z. Gao, Organic matter accumulation of Late Ordovician sediments in North Guizhou Province, China: Sulfur isotope and trace element evidences. Marine and Petroleum Geology, 59, 348-358, 2015. https://doi.org/ 10.1016/j.marpetgeo.2014.09.017
  129. D. Piper and R. Perkins, A modern vs. Permian black shale—the hydrography, primary productivity, and water-column chemistry of deposition. Chemical Geology. 206, 177-197, 2004. https://doi.org/10.1016 /j.chemgeo.2003.12.006
  130. A. E. Murphy, B. B. Sageman, D. J. Hollander, T. W. Lyons and C. E. Brett, Black shale deposition and faunal overturn in the Devonian Appalachian Basin: Clastic starvation, seasonal water‐column mixing, and efficient biolimiting nutrient recycling. Paleoceanography, 15 280-291, 2000. https://doi.org /10.1029/1999PA000445
  131. L. Chen, M. Xiong, X. Tan, X. Chen, J. Zheng, Y. Yang, C. Jing and G. Wang, Coupling mechanism between sea level changes and pore heterogeneity of marine shale reservoirs driven by astronomical orbital cycles: Lower Silurian Longmaxi shale in the Upper Yangtze area, South China. Marine and Petroleum Geology, 160, 106590, 2024. https://doi.org/10.1016/j. marpetgeo.2023.106590
  132. M. Reolid, J. M. Molina, L. M. Nieto and F. J. Rodríguez-Tovar, The Toarcian oceanic anoxic event in the South Iberian Palaeomargin, Springer, 2018.
  133. D. E. Ruhlin and R. M. Owen, The rare earth element geochemistry of hydrothermal sediments from the East Pacific Rise: Examination of a seawater scavenging mechanism. Geochimica et Cosmochimica Acta. 50, 393-400, 1986. https://doi.org/10.1016/0016-7037(86)90192-4
  134. H. C. Jenkyns, Geochemistry of oceanic anoxic events. Geochemistry, Geophysics, Geosystems, 11, 2010. https://doi.org/10.1029/2009GC002788
  135. F. Yang, G.-L. Zhang, J.-L. Yang, D.-C. Li, Y.-G. Zhao, F. Liu, R.-M. Yang and F. Yang, Organic matter controls of soil water retention in an alpine grassland and its significance for hydrological processes. Journal of Hydrology, 519, 3086-3093, 2014. https://doi.org/ 10.1016/j.jhydrol.2014.10.054
  136. M. Usman, M. Ardila-Sanchez, E. Idiz, I. S. Abu-Mahfouz, F. van Buchem and V. Vahrenkamp, Organic and inorganic geochemical cyclicity of a Maastrichtian oceanic open-shelf carbonate source rock, Scientific Reports, 15, 15993, 2025. https://doi. org/10.1038/s41598-025-99832-w
  137. N. P. Kozik, A Tour of Ordovician Paleoredox Conditions: A Primary Driver for Ancient Biodiversity. The Florida State University, 2022.
  138. D. Muñoz-López, A. Koeshidayatullah, T. Bover-Arnal, A. Herlambang, J. D. Martín-Martín, R. Salas, J. D. Humphrey and K. Al-Ramadan, Isotope record of Aptian third-order sea-level trends in platform margin carbonates: implications for sequence stratigraphic analysis. Journal of Sedimentary Research, 95, 417-433, 2025. https://doi.org/10.2110/jsr.2024.124
  139. S. Westermann, M. Stein, V. Matera, N. Fiet, D. Fleitmann, T. Adatte and K.B. Föllmi, Rapid changes in the redox conditions of the western Tethys Ocean during the early Aptian oceanic anoxic event, Geochimica et Cosmochimica Acta, 121, 467-486, 2013. https://doi.org/10.1016/j.gca.2013.07.023
  140. A. Okay, M. Satir and W. Siebel, Pre-Alpide Palaeozoic and Mesozoic orogenic events in the Eastern Mediterranean region, 2006. https://doi.org/10.1144/GSL.MEM.2006.032.01.23
  141. J. Armstrong-Altrin and S. P. Verma, Critical evaluation of six tectonic setting discrimination diagrams using geochemical data of Neogene sediments from known tectonic settings. Sedimentary Geology. 177, 115-129, 2005. https://doi.org/10.1016/j.sedgeo.2005.02.004
  142. B. Zhang, P. B. Wignall, S. Yao, W. Hu and B. Liu, Collapsed upwelling and intensified euxinia in response to climate warming during the Capitanian (Middle Permian) mass extinction. Gondwana Research. 89, 31-46, 2021. https://doi.org/10.1016/j.gr.2020.09.003
  143. R. V. Tyson and T. H. Pearson, Modern and ancient continental shelf anoxia: an overview, Geological Society, London, Special Publications, 58, 1-24, 1991. https://doi.org/10.1144/GSL.SP.1991.058.01.01
  144. P. B. Wignall and R. J. Twitchett, Oceanic anoxia and the end Permian mass extinction. Science, 272, 1155-1158, 1996. https://doi.org/10.1126/science.272.5265.1155
  145. X. Zhang, Z. Gao, T. Fan, J. Xue, W. Li, H. Zhang and F. Cao, Element geochemical characteristics, provenance attributes, and paleosedimentary environment of the Paleogene strata in the Lenghu area, northwestern Qaidam Basin, Journal of Petroleum Science and Engineering, 195,107750, 2020. https://doi.org/10.1016/j.petrol.2020.107750