Orbital-scale changes in redox condition and biogenic silica/detrital fluxes of the Middle Jurassic Radiolarite in Tethys (Sogno, Lombardy, N-Italy): Possible link with glaciation?

Ikeda, Masayuki; Bôle, Maximilien; Baumgartner, Peter O.

doi:10.1016/j.palaeo.2016.06.009

Cited by 20 publications

(9 citation statements)

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“…These values are compatible with published empirical data (Table 1) of Ikeda et al. (2016), Huang (2018), and Cheng et al. (2017).…”

Section: Discussionsupporting

confidence: 93%

“…A dominant obliquity signal is evident in Bajocian‐Bathonian, color rank and chert abundance in deep water pelagic facies, Italy (Huang, 2018; Ikeda et al., 2016), and in gamma‐ray logs and resistivity logs of cyclic carbonate‐evaporite platform facies, China (Cheng et al., 2017). The abundant evidence for cool conditions and ice in the Bajocian‐Bathonian suggests that glacioeustasy drove sea level changes at the Milankovitch scale (Dera et al., 2011; Nunn & Price, 2010; Price, 1999; Ruebsam & Schark, 2021).…”

Section: Discussionmentioning

confidence: 99%

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Milankovitch Record From Middle Jurassic Platform Supports Moderate Coolhouse Glaciation

Husinec,

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2023

Paleoceanog and Paleoclimatol

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There are few documentations of far‐field effects of coolhouse glaciation and its signature preserved within Middle Jurassic carbonate platforms. Through outcrop logging and time series analysis we document the cyclostratigraphy of the upper Bajocian‐Bathonian interval of the Adriatic Platform, Croatia. The 200 m thick, ∼3.3 Myr duration cyclic platform record consists of peritidal carbonate parasequences (n = 109) with high‐energy grainstone‐rudstone bases fining up into micritic carbonate caps. There is little evidence of long‐term exposure near purported sequence boundaries, indicating the succession is conformable above the parasequence scale. Time series were constructed using Dunham rank and stratigraphic position, and parasequence thickness and stratigraphic position. A statistical estimation of accumulation rates using average spectral misfit (ASM) and correlation coefficient (COCO) methods that compare spectral peaks with an astronomical model at various sedimentation rates suggests that these rates ranged from 4.5 to 6 cm/kyr, which is compatible with long‐term rates based on thickness divided by duration. The time series analysis of rank series and cycle thickness series indicates long‐term obliquity modulation (∼1 Myr), short obliquity modulation (173 kyr), strong obliquity, and weak precession. The 173 kyr cycle is particularly evident in the cycle thickness series. The similarity of the spectra to the obliquity‐dominated Cenozoic coolhouse supports moderate southern hemisphere glaciation driving glacioeustatic sea level changes during the Middle Jurassic.

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“…These values are compatible with published empirical data (Table 1) of Ikeda et al. (2016), Huang (2018), and Cheng et al. (2017).…”

Section: Discussionsupporting

confidence: 93%

Section: Discussionmentioning

confidence: 99%

Milankovitch Record From Middle Jurassic Platform Supports Moderate Coolhouse Glaciation

Husinec,

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2023

Paleoceanog and Paleoclimatol

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“…The GTS2020 (Gradstein et al 2020) gives a duration of 2.73 Ma for the whole Bajocian stage. A cyclostratigraphic analysis ((Huang 2018) based on the dataset of (Ikeda, et al 2016)), indicate a total duration of 4 Ma for the two Bajocian-Bathonian stages, implying a duration of ~2 Ma for the Bajocian. However, a cyclostratigraphic study based on Chaudon-Norante section in the South Alpine basin suggested that the lower Bajocian stage may last at least 4 Ma (Sucheras-Marx et al 2013), leading to a much longer estimate of 9.5 Ma for the whole Bajocian.…”

Section: -Bajocian Section (~170 Ma)mentioning

confidence: 99%

Are marl-limestone alternations mainly driven by CaCO3 variations at the astronomical timescale? New insights from extraterrestrial 3He

Blard¹,

SUCHERAS-MARX²,

SUAN³

et al. 2023

Preprint

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Marl-limestone alternations are rhythmical inter-bedded deposits that commonly occur in many sedimentological environments. It is quite well established that these lithological variations originate from astronomically-driven climatic variations paced by the Milankovitch cycles of main periods 19, 23, 41, 100 and 405 ka. However, the sedimentological mechanisms involved are not clear: some models attribute these alternations to cyclic changes in the carbonate flux, while terrigenous siliciclastic input remained relatively constant. On the opposite, other models suggest that the carbonate flux was constant while the siliciclastic flux changed cyclically, or that both fluxes varied in antiphase. To disentangle these different scenarios, we collected marlstone and limestone samples from two sedimentary hemipelagic marl-limestone successions of Bajocian, Middle Jurassic (3 marl-limestone couplets over 3.4 m) and Valanginian, Lower Cretaceous (1 marl-limestone couplet over 0.9 m) from the Southern French Alps (Barles). We measured their concentrations in calcium carbonate, organic carbon, nannofossil, as well as in extraterrestrial 3He (3HeET). Carbonate contents range from 45% in marls to 86% in limestones. Importantly, the measured 3HeET concentrations of all samples remained nearly constant in the siliciclastic fractions, within uncertainties (< 20%). Hence, our results indicate that, at the astronomical timescale, sedimentation rates were mainly controlled by large changes in the CaCO3 net fluxes, leading to variable dilution of the terrigenous input. Nannofossil counting shows that pelagic CaCO3 fluxes of coccolithophores are inversely correlated to the total carbonate content along the marl-limestone alternations and represent less than 7% of the total carbonate content. Hence, in this setting, these marl-limestone alternations were driven by fluctuations in micritic CaCO3 supply from the nearby carbonate platform that variably diluted nannofossil and organic carbon particles. Finally, assuming a constant 3HeET flux of 100 pcc.cm-2.Ma-1, total 3HeET-derived sedimentation rates range from 20 to 30 m/Ma in the marl strata, while they reach up to 80 to 100 m/Ma in the limestone layers. These sedimentation rates are broadly compatible with local average rates estimated for the whole Bajocian and Valanginian stages by biostratigraphy.

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“…Mundil et al, 1996;Wotzlaw et al, 2017% Hinnov, 20132 Laskar et al, 2004Fig. 1 Hays et al, 1976OAE Algeo et al, 2010Ikeda et al, 2010Ikeda et al, , 2015Ikeda et al, , 2016Ikeda et al, , 2017Ikeda et al, , 2018Ikeda andTada, 2013, 2014;Ikeda and Hori, 2014;Zhang et al, 2014;Meyer and Malinverno, 2018 Laskar et al, 2004). The red, yellow green, dark green, and blue contour levels are chosen such that 75%, 50%, 25%, and 5% of the wavelet power is above each level, respectively.…”

mentioning

confidence: 99%

“…The cycle can be subdivided into two subcycles involving organic matter (left-hand side) and silicate weathering and carbonate deposition (right-hand side). 2 Hori et al, 1993;De Wever et al, 2015Winguth and Winguth, 2012De Wever et al, 2014Zhang et al, 2015;Ikeda et al, 2016Winckler et al, 2008Woodard et al, 2011Ikeda et al, 2010 1 mm 1994 SiO 2 /Al 2 O 3 K 2 O/Al 2 O 3 Ti 2 O/Al 2 O 3 10 Sugitani and Mimura, 1996;, 10 Grocke et al, 2010Sakuma et al, 2012;Sato et al, 2015;Ikeda et al, 2018, Abe-Ouchi et al, 2013, Winguth and Winguth, 2012Ando et al, 2001Uno et al, 2012Uno et al, , 2015; , --Newark Kent et al, 2017Guandao Li et al, 2016Takemura, 2007Hori et al, 2011 Re-Os 2 1000 , Fischer and Arthur, 1977…”

mentioning

confidence: 99%

Astronomical cycles recorded in the sedimentary rhythms of deep-sea bedded chert and its significance on biogeochemical cycle

Ikeda

2018

Jour. Geol. Soc. Japan

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Quasi-periodic changes in Earth s orbital parameters (i.e., Milankovitch cycles) are widely recorded in rhythmic sediments. Astrochronology, which uses such sedimentary cycles, has been used to improve the geologic timescale and advance our understanding of Earth system dynamics, principally during the Cenozoic Era. Paleozoic to Mesozoic radiolarian bedded chert deposits consist of rhythmic alternations of chert and shale that are potentially related to Milankovitch-scale changes in the flux of biogenic silica . Here we review recent progress in astrochronology and its applications to Permian to Cretaceous bedded chert deposits. The sedimentary rhythms of bedded chert display a full range of climatic precessionand eccentricity-related cycles: a kyr cycle is preserved as a chertshale couplet and ~ , , -, and , kyr cycles are recorded as variations in the thicknesses of individual beds. Using an anchor at the end-Triassic extinction level at . . Ma, an astronomical timescale for the Triassic-Jurassic Inuyama bedded chert (Inuyama-ATS) is established. Estimates of the burial flux of biogenic silica show fluctuations of %-% over kyr to Myr cycles, suggesting that orbital-scale chemical weathering on Pangea would have controlled the sedimentary rhythms of bedded chert through the biogeochemical Si cycle.

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Orbital-scale changes in redox condition and biogenic silica/detrital fluxes of the Middle Jurassic Radiolarite in Tethys (Sogno, Lombardy, N-Italy): Possible link with glaciation?

Cited by 20 publications

References 63 publications

Milankovitch Record From Middle Jurassic Platform Supports Moderate Coolhouse Glaciation

Milankovitch Record From Middle Jurassic Platform Supports Moderate Coolhouse Glaciation

Are marl-limestone alternations mainly driven by CaCO3 variations at the astronomical timescale? New insights from extraterrestrial 3He

Astronomical cycles recorded in the sedimentary rhythms of deep-sea bedded chert and its significance on biogeochemical cycle

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