Astronomical forced sequence infill of Early Cambrian Qiongzhusi organic-rich shale of Sichuan Basin, South China

Liu, Sibing; Jin, Song; Liu, Yan; Chen, Anqing

doi:10.1016/j.sedgeo.2022.106261

Cited by 15 publications

(14 citation statements)

References 86 publications

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“…(2022) and S. Liu et al. (2022). Specifically, the DYNOT model was employed to extract water‐depth interrelated noise and detect sea‐level rise and drop processes in Al + K + Ti, Zr/Al, Ba/Al, S/Fe, and Sr/Ca data series.…”

Section: Methodsmentioning

confidence: 99%

“…The sedimentary noise modeling method incorporates two independent approaches: dynamic noise after orbital tuning (DYNOT) and lag-1 autocorrelation coefficient (ρ1) analyses (M. S. . This method Geochemistry, Geophysics, Geosystems 10.1029/2023GC011127 effectively reconstructs sea-level change curves in marine settings, as demonstrated by H. Cao et al (2022) and S. Liu et al (2022). Specifically, the DYNOT model was employed to extract water-depth interrelated noise and detect sea-level rise and drop processes in Al + K + Ti, Zr/Al, Ba/Al, S/Fe, and Sr/Ca data series.…”

Section: Sedimentary Noise Modelingmentioning

confidence: 99%

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Orbital and Millennial‐Scale Cycles Through the Hirnantian (Late Ordovician) in Southern China

Jin,

Cao,

Hou

et al. 2024

Geochem Geophys Geosyst

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The Hirnantian period, making the end of the Ordovician with significant mass extinctions and large ice‐sheets, is a critical interval for studying paleoclimate variations. This research represents the first cyclostratigraphic study of this period, utilizing high‐resolution (1 mm sampling rate) geochemical data from the ∼7‐m thick SH‐1 drill core, capturing the latest Ordovician glaciation. Our analysis identifies the presence of Milankovitch cycles with periods of 17–21, ∼33, and ∼100‐kyr, suggesting an optimal sedimentation rate of 3.1 m/Myr. Notably, we detected signals of millennial‐scale variability, aligning with the ∼1.5‐kyr Dansgaard‐Oeschger and ∼2.4‐kyr Hallstatt heliomagnetic cycles, even in deposits lacking visible laminae alternation. This finding bolsters the hypothesis of an external origin for these millennial‐scale features. Additionally, our reconstruction of sea‐level variations, using principal component analysis and sedimentary noise modeling, reveals two intervals of sea‐level fall and one sea‐level rise, linked to an astronomical forcing cycle of ∼1.2‐Myr. The obliquity band power‐total power ratios correspond to ∼1.2‐Myr periodicities for s4‐s3 term. The synchronization of ∼1.2‐Myr cycle minimum with a sea‐level drop (low PC1 value) suggests that glacio‐eustatic variations were influenced by ∼1.2‐Myr obliquity modulation cycles. This research enhances our understanding of glacio‐eustasy during the latest Ordovician from an astronomical perspective, offering valuable insights into the interplay between orbital cycles and Earth's paleoclimate.

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Section: Methodsmentioning

confidence: 99%

Section: Sedimentary Noise Modelingmentioning

confidence: 99%

Orbital and Millennial‐Scale Cycles Through the Hirnantian (Late Ordovician) in Southern China

Jin,

Cao,

Hou

et al. 2024

Geochem Geophys Geosyst

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“…Jupiter's large mass ensures that this cycle is robustly modeled over several hundreds of Myr (Berger et al, 1992;Laskar et al, 2004;Hinnov, 2013). The long eccentricity cycle therefore serves essentially as a "metronome" in astrochronology and has accordingly been applied for calibrating the geological time scale (e.g., Hinnov and Hilgen, 2012;Wang et al, 2020;Liu et al, 2022;Wei et al, 2023). Tuning the approximately 40-50 m cycles of the time series to the long eccentricity cycle enables the number of eccentricity cycles to be recognized.…”

Section: Cycles In the Time Domainmentioning

confidence: 99%

“…The sedimentary sequence hierarchy is based mostly on the timing and amplitude of sea level oscillations (e.g., Vail et al, 1977;Boulila et al, 2011). Recent reports have argued that climate change associated with orbital forcing is the major factor that controls the development of third-order and higher frequency sequences (Boulila et al, 2011;Liu et al, 2022;Wu et al, 2022). The third-order sequences may be connected to ~2.4 Myr long-period eccentricity and ~1.2 Myr long-period obliquity (e.g., Boulila et al, 2011;Cong et al, 2019;Du et al, 2020).…”

Section: High-frequency Sedimentary Framework Division and Correlationmentioning

confidence: 99%

“…For example, successful orbital tuning in eastern North America's Newark rift basin has revealed a wide range of lake-level changes related to precession periods (Olsen and Kent, 1996;Kent et al, 2017). Liu et al (2022) established a floating timeline that was calibrated to the long eccentricity cycles (405 kyr) and redefined the high-resolution marine sequence framework of the organic-rich Qiongzhusi shale of Early Cambrian age in the Sichuan Basin.…”

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confidence: 99%

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Cyclostratigraphy and high-frequency sedimentary cycle framework for the Late Paleozoic Fengcheng Formation, Junggar Basin

Liu

Zhang

et al. 2023

Front. Earth Sci.

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The Late Paleozoic Fengcheng Formation within the Mahu Sag of the Junggar Basin (China) harbors the world’s oldest alkaline lake hydrocarbon source rocks. Spectral analysis of the natural gamma-ray (GR) series obtained from four boreholes traversing the Fengcheng Formation, with wavelength ranges of 28.4 m–50 m, 5.9 m–12.6 m, 2.3 m–3.9 m, and 1.2 m–2.7 m. These were controlled by Early Permian astronomical cycles, including 405 kyr long eccentricity, 100 kyr short eccentricity, 34.2 kyr obliquity, and 20.7–17.4 kyr precession. The most significant cycle was notably that of the 405 kyr long eccentricity, which was instrumental for dividing and correlating the high-frequency sedimentary sequences in lacustrine shales. Nine intermediate-term and 36 short-term base-level cycles were identified in the P1f1 and P1f2 members of the Fengcheng Formation. These cycle types are equal to the 405 kyr long eccentricity cycle and ∼100 kyr short eccentricity cycle, respectively. The paleolake-level variations in the Fengcheng Formation were reconstructed using sedimentary noise modeling, revealing that lake levels reached their highest value during the deposition of the P1f2 Member. The spatial distribution patterns of lithofacies in the Fengcheng Formation can be clearly demonstrated within the isochronous cycle framework under the constraints of long eccentricity cycles. The use of astronomical cycles in isochronous stratigraphic correlation offers great potential for characterizing alkaline lacustrine sequences and predicting favorable areas for shale oil exploration with higher accuracy.

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Genesis of ultra-deep dolostone and controlling factors of large-scale reservoir: A case study of the Sinian Dengying Formation and the Cambrian Longwangmiao Formation in the Sichuan Basin

Li,

Zhu,

Zhang

2024

Sci. China Earth Sci.

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Astronomical forced sequence infill of Early Cambrian Qiongzhusi organic-rich shale of Sichuan Basin, South China

Cited by 15 publications

References 86 publications

Orbital and Millennial‐Scale Cycles Through the Hirnantian (Late Ordovician) in Southern China

Orbital and Millennial‐Scale Cycles Through the Hirnantian (Late Ordovician) in Southern China

Cyclostratigraphy and high-frequency sedimentary cycle framework for the Late Paleozoic Fengcheng Formation, Junggar Basin

Genesis of ultra-deep dolostone and controlling factors of large-scale reservoir: A case study of the Sinian Dengying Formation and the Cambrian Longwangmiao Formation in the Sichuan Basin

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