Astronomically forced climate cooling across the Eocene–Oligocene transition in the Pearl River Mouth Basin, northern South China Sea

Wei, Xiaosong; Yan, Detian; Luo, Pan; Jiang, Ping; Wang, Hua; Zhou, Jiaxiong; Cong, Fuyun; Niu, Xing; Li, Tong; Liu, Lei; Liu, Entao

doi:10.1016/j.palaeo.2020.109945

Cited by 20 publications

(2 citation statements)

References 80 publications

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“…This age assignment is supported by palynological studies. The floristic assemblage is dominated by Fagaceae and gymnosperms ( Trung et al., 1999a , b ), similar to other Oligocene palynofloras from north Vietnam ( Wysocka et al., 2018 ) and South China ( Herman et al., 2017 ; Wei et al., 2020 ). Palm fossils were collected from the upper part of the Dong Ho Formation ( Fig.…”

Section: Methodsmentioning

confidence: 68%

Leaf fossils of Sabalites (Arecaceae) from the Oligocene of northern Vietnam and their paleoclimatic implications

et al. 2022

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Section: Methodsmentioning

confidence: 68%

Leaf fossils of Sabalites (Arecaceae) from the Oligocene of northern Vietnam and their paleoclimatic implications

et al. 2022

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“…Obliquity is commonly prescribed as a high‐latitude signal. However, nonlinear responses to the insolation gradient between low and high latitudes might spread the obliquity signal out of polar regions (O'Connor et al ., 2020; Wei et al ., 2020). High‐latitude ice sheet growth and increased extent of low‐carbon Arctic biomes are mechanisms evoked to explain the presence of obliquity at lower latitudes (De Vleeschouwer et al ., 2020; Drury et al ., 2021).…”

Section: Discussionmentioning

confidence: 99%

Orbitally‐driven Palaeogene to Neogene deposition in the western South Atlantic (Espírito Santo Basin) and its correlation with global sea level

et al. 2023

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Over the last 66 million years, Earth has undergone dramatic climate changes, shifting from a warm greenhouse to the more recent cold icehouse with polar ice caps in both hemispheres. Geological records show that the transition between these equilibrium states caused significant long‐term eustatic sea‐level and atmospheric CO2 decline paced by external orbital motions. Such eustatic variability influenced the stacking pattern of sedimentary successions, generating cyclic sequence boundaries that may be globally correlated. However, the impact of such oscillation along the Brazilian margin is largely unknown. This study used the natural gamma‐ray log from a well (ES‐2) at the offshore Espírito Santos Basin (western South Atlantic) measured between late‐Palaeocene and late‐Miocene. Null hypothesis tests ‐ evolutionary Average Spectral Misfit and Correlation Coefficient of no orbital modulation ‐ were executed to confirm the influence of astronomical parameters. The evolutionary Time Optimization algorithm was used to extract the sedimentation rate and depositional time. The anchored timescale shows a chronological interval placed between 58.97 and 7.72 ± 0.1 Ma (mid‐Thanetian – late Tortonian), mostly influenced by long‐eccentricity and short‐eccentricity (405 kyr and ca 100 kyr, respectively) and obliquity (ca 40 kyr) and their respective amplitude modulations (ca 2.4 Myr and 1.2 Myr). Applying the Integrated Prediction Error Filter Analysis and a high‐resolution age model, this study identified main depositional trends through time and correlated them to global sea‐level change. The correlation indicates that several intervals of global sea‐level reduction agree with a regressive trend at the ES‐2 site, but this relation is affected during enhanced regional tectonic activity intervals, as related to the emplacement of the Abrolhos Archipelago. The strategy adopted here is a way to join cyclostratigraphy and sequence stratigraphy, and promotes high‐resolution local‐to‐global correlation by identifying key stratigraphic surfaces. This will be relevant for palaeoclimatic studies and the geoscientific industry.

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Lake Level Variation and Its Orbital Constraints in the Ganchaigou Formation of the Kaitemilike Area, Western Qaidam Basin

Wang¹,

Tang

et al. 2022

Springer Series in Geomechanics and Geoengineering

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Astronomically forced climate cooling across the Eocene–Oligocene transition in the Pearl River Mouth Basin, northern South China Sea

Cited by 20 publications

References 80 publications

Leaf fossils of Sabalites (Arecaceae) from the Oligocene of northern Vietnam and their paleoclimatic implications

Leaf fossils of Sabalites (Arecaceae) from the Oligocene of northern Vietnam and their paleoclimatic implications

Orbitally‐driven Palaeogene to Neogene deposition in the western South Atlantic (Espírito Santo Basin) and its correlation with global sea level

Lake Level Variation and Its Orbital Constraints in the Ganchaigou Formation of the Kaitemilike Area, Western Qaidam Basin

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