Precession-driven climate cycles and time scale prior to the Hirnantian glacial maximum

Sinnesael, Matthias; McLaughlin, Patrick I.; Desrochers, André; Mauviel, Alain; Weirdt, Julie De; Claeys, Philippe; Vandenbroucke, Thijs R.A.

doi:10.1130/g49083.1

Cited by 23 publications

(9 citation statements)

References 32 publications

(52 reference statements)

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“…However, no other sectors of Gondwana record glaciogenic sediments during these time intervals. Furthermore, cyclostratigraphic analysis also indicates the main glaciation initiated in the early Hirnantian stage 64 . In our reconstruction of the latest Katian, Niger was close to the South Pole (Fig.…”

Section: Discussionmentioning

confidence: 96%

Ordovician–Silurian true polar wander as a mechanism for severe glaciation and mass extinction

et al. 2022

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The Ordovician–Silurian transition experienced severe, but enigmatic, glaciation, as well as a paradoxical combination of mass extinction and species origination. Here we report a large and fast true polar wander (TPW) event that occurred 450–440 million years ago based on palaeomagnetic data from South China and compiled reliable palaeopoles from all major continents. Collectively, a ~50˚ wholesale rotation with maximum continental speeds of ~55 cm yr−1 is demonstrated. Multiple isolated continents moving rapidly, synchronously, and unidirectionally is less consistent with and plausible for relative plate motions than TPW. Palaeogeographic reconstructions constrained by TPW controlling for palaeolongitude explain the timing and migration of glacial centers across Gondwana, as well as the protracted end-Ordovician mass extinction. The global quadrature pattern of latitude change during TPW further explains why the extinction was accompanied by elevated levels of origination as some continents migrated into or remained in the amenable tropics.

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Section: Discussionmentioning

confidence: 96%

Ordovician–Silurian true polar wander as a mechanism for severe glaciation and mass extinction

et al. 2022

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“…Chen et al, 2013;Fang et al, 2018;Franco et al, 2012;Montañez, 2022). This similarity extends to the Late Ordovician ice age, where sedimentary records are believed to preserve orbital cycles comparable to those observed in LPIA (Jin et al, 2020;Sinnesael et al, 2021Sinnesael et al, , 2022Zhong et al, 2020), including millennial scale cycles akin to the Dansgaard-Oeschger (D-O) oscillation (Dansgaard et al, 1993) or Hallstatt cycle (Nederbragt & Thurow, 2005). While these millennial-scale cycles are commonly identified in rhythmites (Rodríguez-Tovar & Pardo-Iguízquiza, 2003;Walters et al, 2020), there is a growing recognition that they may also be preserved in sedimentary rocks without visible rhythmites.…”

Section: Introductionmentioning

confidence: 83%

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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“…Details of these methods are in Supporting Information . Testing spectral peaks against astronomical targets using the average spectral misfit (ASM) technique (Meyers & Sageman, 2007). Devising plausible sedimentation accumulation rate (SAR) models for the succession using the TimeOpt methodology (Meyers, 2015), evolutionary TimeOpt (Meyers, 2019; Sinnesael et al., 2021), and timeOptTemplate procedures. The multiple proxies allowed triangulation and testing of the SAR models using the TimeOpt regression coefficients r 2 envelope and r 2 opt (Meyers, 2015), where r 2 opt is the expression of the amplitude envelope*spectral power.…”

Section: Samples and Methodsmentioning

confidence: 99%

Rock Magnetic‐Based Cyclic Expression in Late Visean Ramp Carbonates and an Astrochronology for the Late Asbian From Northwest England

Hounslow,

Cózar,

Somerville

et al. 2024

Paleoceanog and Paleoclimatol

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The late Asbian appears to mark the initial, well‐documented, onset of far‐field glacio‐eustatic changes in equatorial Mississippian strata. This work unravels the nature of cyclicity in upper Asbian shallow marine carbonates, using a combination of petrographic study, rock magnetic proxies and astrochronological testing on samples from the Trowbarrow section, NW England. Rock magnetic data express the content of two types of siliciclastic sources; a marine‐delivered magnetite‐dominated source, and an eolian‐delivered, hematite‐dominated source. The eolian‐sourced material generally peaked during regressive and low‐stand parts of the carbonate rhythms. Astrochronologic testing methods based around the average spectral misfit and TimeOpt methodology show the magnetite abundance proxies are principally carrying the astronomically forced signal. Two likely sedimentation rate models are derived from the five better magnetic proxies using evolutive methods. In addition, a set of three likely major hiatus levels are inferred in the sedimentation rate models, based on testing possible major hiatus scenarios with TimeOpt methods, using eccentricity modulation. From these, using the three best proxies, an average astrochronologic duration for the Trowbarrow section suggests a late Asbian duration of 1976 ± 86 kyr (1σ), and a basal late Asbian age of 334.48 ± 0.35 Ma (2σ). Coupled atmosphere‐ocean models for the late Paleozoic, suggest that lows in short eccentricity correspond to glacials, when inferred delivery of siliciclastic sediment to the carbonate ramp is generally at a maximum. The glacial and lower sea‐level intervals also coincide with maximum delivery of eolian siliciclastics, likely linked to increased aridity and less vegetation cover on adjacent and distal parts of Laurentia.

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Precession-driven climate cycles and time scale prior to the Hirnantian glacial maximum

Cited by 23 publications

References 32 publications

Ordovician–Silurian true polar wander as a mechanism for severe glaciation and mass extinction

Ordovician–Silurian true polar wander as a mechanism for severe glaciation and mass extinction

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

Rock Magnetic‐Based Cyclic Expression in Late Visean Ramp Carbonates and an Astrochronology for the Late Asbian From Northwest England

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