Evidence of orbital forcing in lake-level fluctuations in the Middle Eocene oil shale-bearing lacustrine successions in the Mudurnu-Göynük Basin, NW Anatolia (Turkey)

Ocakoğlu, Faruk; Açıkalın, Sanem; Yılmaz, İsmail Ömer; Şafak, Ümit; Gökçeoğlu, Candan

doi:10.1016/j.jseaes.2012.04.021

Cited by 15 publications

(14 citation statements)

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“…Indeed, δ 13 C TOC and TOC values in the Fushun Basin reflect increased lake productivity and subsequent burial of organic matter as oil shales across the EECO (Figure ). In fact, lacustrine oil shales with an early‐middle Eocene age are widespread throughout the world, including the Parachute Creek Member of the Green River Formation in North America [ Cumming et al ., ], the Messel oil shale in Germany [ Lenz et al ., ], oil shales in central Jordan [ Alqudah et al ., ], China [ Sun et al ., ; Strobl et al ., ], and Turkey [ Ocakoğlu et al ., ]. Because organic carbon is highly enriched in 12 C during photosynthesis, increased burial of organic matter will remove the 12 C and thus cause less depleted δ 13 C in the exogenic carbon reservoir.…”

Section: Discussionmentioning

confidence: 99%

Paleoweathering and paleoenvironmental change recorded in lacustrine sediments of the early to middle Eocene in Fushun Basin, Northeast China

Chen

Ding

Tang

et al. 2017

Geochem Geophys Geosyst

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Deciphering the long-term interaction among continental silicate weathering, global climate, and atmospheric CO 2 concentrations is helpful in understanding the mechanisms of the Cenozoic climate change and accessing the future climatic and environmental response to anthropogenic carbon emissions. The Eocene, which is characterized by the Early Eocene Climatic Optimum (EECO) and the following global cooling, represents an ideal test case. Here we generate geochemical data of the Eocene lacustrine sediments from the Fushun Basin, northeast China, to explore the regional climatic response to the global climate change. The chemical index of alteration (CIA) and plagioclase index of alteration (PIA) consistently show a gradual, long-term decrease, indicating a climatic transition from warm and humid to relatively cold and arid during the Eocene in the Fushun Basin. This climatic trend is broadly coincident with the global cooling and decreasing CO 2 concentration, implying that the regional climate is closely correlated with the global climate change over geological time scales. Additionally, the extreme silicate weathering and high lake productivity as reflected by relatively positive d 13 C values of lacustrine organic matter are associated with the EECO. This consistency may demonstrate that enhanced continental weathering and lake productivity had served as effective sinks to lower atmospheric CO 2 across the EECO. Collectively, our new geochemical data add supporting evidence for a long-term, close coupling among continental silicate weathering, climate, and global carbon cycle during the Eocene.

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Section: Discussionmentioning

confidence: 99%

Paleoweathering and paleoenvironmental change recorded in lacustrine sediments of the early to middle Eocene in Fushun Basin, Northeast China

Chen

Ding

Tang

et al. 2017

Geochem Geophys Geosyst

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“…A marine succession of a similar age in Massignano, Italy, also displays striking limestone-marl cycles (Jovane et al, 2006). Cyclic lithologic patterns are also seen in the middle Eocene oilshale-bearing lacustrine succession in the Mudurnu-Göynük Basin, Turkey (Ocakoglu et al, 2012), the Eocene oil-shalebearing Green River formation in the United States (Meyers, 2008), and other terrestrial records of similar ages in Asia (e.g., Dupont-Nivet et al, 2007;Xiao et al, 2010). All these lithologic cycles are attributed to orbital forcing and represent orbital cycles (Jovane et al, 2006;Dupont-Nivet et al, 2007;Meyers, 2008;Xiao et al, 2010;Ocakoglu et al, 2012).…”

Section: Major Constraints On a Gptsmentioning

confidence: 93%

Terrestrial responses of low-latitude Asia to the Eocene–Oligocene climate transition revealed by integrated chronostratigraphy

Li¹,

Jiao²,

Liu³

et al. 2015

Preprint

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Abstract. The Paleogene sedimentary records from southern China hold important clues to the impacts of the Cenozoic climate changes on low-latitudes. However, although there are extensive Paleogene terrestrial archives and some contain abundant fossils in this region, few are accurately dated and have a temporal resolution adequate to decipher climate changes. Here we present a detailed stratigraphic and paleomagnetic study of a fossiliferous late Paleogene succession in the Maoming Basin, Guangdong Province. The succession consists of oil shale of the Youganwo Formation (Fm) in the lower part and massive pebbly coarse sandstones of the overlying Huangniuling Fm in the upper part. The conformable transition from oil shale to sandstones represents a major depositional environmental change from a lacustrine to a deltaic environment. The substantially refined chronostratigraphic framework is established based on the litho-, bio-, cyclo-, and magnetostratiphic data that place the environmental transition at 33.88 Ma, coinciding with the Eocene–Oligocene climate transition (EOT) at ~ 33.7 to ~ 33.9 Ma. We suggest that the transition from a lacustrine to deltaic environment in Maoming Basin represents terrestrial responses to the EOT and indicates a significant reduction in hydrodynamics in low-latitude regions during the global cooling at EOT.

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“…Correlative deposits in the eastern SB are interbedded with 51.7‐ to 44.7‐Ma lavas and tuffs, and our section is entirely terrestrial, so it is possible that our section captures at least the early Lutetian prior to the late Lutetian‐Bartonian/Priabonian(?) marine incursion (Ocakoğlu et al, , ; Şahin et al, ).…”

Section: Discussionmentioning

confidence: 99%

Collision Chronology Along the İzmir‐Ankara‐Erzincan Suture Zone: Insights From the Sarıcakaya Basin, Western Anatolia

et al. 2019

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Debate persists concerning the timing and geodynamics of intercontinental collision, style of syncollisional deformation, and development of topography and fold-and-thrust belts along the >1,700-km-long İzmir-Ankara-Erzincan suture zone (İAESZ) in Turkey. Resolving this debate is a necessary precursor to evaluating the integrity of convergent margin models and kinematic, topographic, and biogeographic reconstructions of the Mediterranean domain. Geodynamic models argue either for a synchronous or diachronous collision during either the Late Cretaceous and/or Eocene, followed by Eocene slab breakoff and postcollisional magmatism. We investigate the collision chronology in western Anatolia as recorded in the sedimentary archives of the 90-km-long Sarıcakaya Basin perched at shallow structural levels along the İAESZ. Based on new zircon U-Pb geochronology and depositional environment and sedimentary provenance results, we demonstrate that the Sarıcakaya Basin is an Eocene sedimentary basin with sediment sourced from both the İAESZ and Söğüt Thrust fault to the south and north, respectively, and formed primarily by flexural loading from north-south shortening along the syncollisional Söğüt Thrust. Our results refine the timing of collision between the Anatolides and Pontide terranes in western Anatolia to Maastrichtian-Middle Paleocene and Early Eocene crustal shortening and basin formation. Furthermore, we demonstrate contemporaneous collision, deformation, and magmatism across the İAESZ, supporting synchronous collision models. We show that regional postcollisional magmatism can be explained by renewed underthrusting instead of slab breakoff. This new İAESZ chronology provides additional constraints for kinematic, geodynamic, and biogeographic reconstructions of the Mediterranean domain.

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Evidence of orbital forcing in lake-level fluctuations in the Middle Eocene oil shale-bearing lacustrine successions in the Mudurnu-Göynük Basin, NW Anatolia (Turkey)

Cited by 15 publications

References 46 publications

Paleoweathering and paleoenvironmental change recorded in lacustrine sediments of the early to middle Eocene in Fushun Basin, Northeast China

Paleoweathering and paleoenvironmental change recorded in lacustrine sediments of the early to middle Eocene in Fushun Basin, Northeast China

Terrestrial responses of low-latitude Asia to the Eocene–Oligocene climate transition revealed by integrated chronostratigraphy

Collision Chronology Along the İzmir‐Ankara‐Erzincan Suture Zone: Insights From the Sarıcakaya Basin, Western Anatolia

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