Harmonic hierarchy of mantle and lithospheric convective cycles: Time series analysis of hafnium isotopes of zircon

Mitchell, Ross N.; Spencer, Christopher J.; Kirscher, Uwe; He, Xiao-Fang; Murphy, J. Brendan; Li, Zheng‐Xiang; Collins, William J.

doi:10.1016/j.gr.2019.06.003

Cited by 31 publications

(26 citation statements)

References 55 publications

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“…A 10-15 Myr cyclicity has more recently been recorded in continental back-arc process (Wolfram et al, 2019). An extensive review of variations in global magmatic systems brought out cyclicities ranging from 5 to 10 Myr (Mitchell et al, 2019), further supporting tectonic fluctuations at these timescales.…”

Section: Evidence For the 10 And 35 Myr Cyclicities In Astroclimate And Tectonic Archivesmentioning

confidence: 85%

Potential encoding of coupling between Milankovitch forcing and Earth's interior processes in the Phanerozoic eustatic sea-level record

Boulila

Haq

Hara

et al. 2021

Earth-Science Reviews

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The driving mechanisms of Earth's climate system at a multi-Myr timescale have received considerable attention since the 1980's as they are deemed to control largeamplitude climatic variations that result in severe biogeochemical disruptions, major sea-level variations, and the evolution of Earth's land-and seascapes through geological time. The commonly accepted mechanism for these changes derives from the evolution of Earth's coupled plate-mantle system. Connection between Earth's interior and external climate drivers, e.g., Milankovitch insolation forcing, has not been investigated at multi-Myr timescale, because tectonics and astronomical influences at these longer timescales have long been thought as independent pacemakers in the evolution of the Earth system.Here we have analyzed time-series from multiple geological datasets and found common periodicities of 10 and 35 Myr. Additionally, we have highlighted the modulation in amplitude of the 10 Myr cycle band by the 35 Myr cyclicity in sedimentary sea-level data. We then demonstrate the same physical amplitude modulation relationship between these two cyclicities in astronomical (Milankovitch) variations, and establish correlation between Milankovitch and sea-level variations at these two frequency bands. The 10 and 35 Myr cycles are prominent in the geological records, suggesting either unresolved fundamental Milankovitch periodicities, or reflecting a sedimentary energy-transfer process from higher to lower Milankovitch frequencies, as argued here via amplitude modulation analysis in both astronomical and sea-level data.Finally, we find a coherent correlation, at the 35 Myr cycle band, between Milankovitch, sea-level and geodynamic (plate subduction rate) variations, hinting at a coupling between Earth's interior and surface processes via Milankovitch paced climate. Thus, our findings point to a coupling between Milankovitch and Earth's internal forcings, at 10 to 10s of Myr. The most likely scenario that could link insolation-driven climate change to Earth's interior processes is Earth's interior feedbacks to astro-climatically driven mass changes on Earth's surface. We suggest that Earth's interior processes may drive largeamplitude sea-level changes, especially during greenhouse periods, by resonating to astroclimatically driven Earth's surface perturbations.

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Section: Evidence For the 10 And 35 Myr Cyclicities In Astroclimate And Tectonic Archivesmentioning

confidence: 85%

Potential encoding of coupling between Milankovitch forcing and Earth's interior processes in the Phanerozoic eustatic sea-level record

Boulila

Haq

Hara

et al. 2021

Earth-Science Reviews

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“…Earth presently has a global plate tectonic network and the repeated assembly and breakup of supercontinents is an emergent phenomenon of such a self-organizing system. It is likely that the global plate network existed by at least 2 Ga 23 and Earth has experienced 3 supercontinents 10 Independent of palaeogeography, geological and geochemical proxies corroborate the ~600 Myr duration of the supercontinent cycle 37,38,82,96,97 . Even though a ~600 Myr period is dominant 37,38 , other cyclicities of both longer and shorter periods are present 19,37,94,97 and future research needs to address the degree to which the supercontinent cycle is not simply a single cycle, but potentially a more complex 224 spectrum of interacting cyclicities.…”

Section: Igneous Geochemistry Provides a Clear Test Between Introversion And Extroversion Withmentioning

confidence: 83%

“…For example, the East African rift 34 (continued breakup of Pangaea) and the continental collision of India with Eurasia 35 (assembly of the next supercontinent) both occur simultaneously in Cenozoic time. A supercontinent cycle is often considered to last 400-800 million years 36 (Myr), where a statistical basis for such Nature Reviews Earth & Environment a ~600 Myr duration has been identified using time series analysis of hafnium isotopes of zircon 37 , a geochemical proxy for the supercontinent cycle 38 . To be clear, the stable tenure period of a supercontinent (after assembly and before breakup) represents only a small duration of this full cycle, where tenures of the past known supercontinents have lasted between 100 and 300 Myr 39 (Fig.…”

Section: Toc Summarymentioning

confidence: 99%

“…Building on this consensus of robust patterns in temporal proxies for the supercontinent cycle, we explore how geochemistry can be used to depict a timeline of assembly and breakup of the past three supercontinents. Orogenesis during supercontinent assembly should considerably increase the volume of supracrustal reworking in the magmatic systems relative to mantle values 196 , as has been argued for using Hf isotopes of zircon showing fluctuations between crustal reworking (supercontinent assembly) and mantlederived magmatism (supercontinent breakup) 37,38 .…”

Section: Igneous Geochemistry Provides a Clear Test Between Introversion And Extroversion Withmentioning

confidence: 99%

“…4). Using geochemical proxies such as hafnium 37,38 and oxygen (Fig. 4) isotopes on well-dated zircons thus establishes a statistical basis for the supercontinent cycle.…”

Section: Igneous Geochemistry Provides a Clear Test Between Introversion And Extroversion Withmentioning

confidence: 99%

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The supercontinent cycle

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Salminen

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Supercontinents signify self-organization in plate tectonics. Over the past ~2 billion years 3 major supercontinents have been identified, with increasing age: Pangaea, Rodinia, and Columbia. In a prototypal form, a cyclic pattern of continental assembly and breakup likely extends back to ~3 billion years ago, albeit on the smaller scale of Archaean supercratons which, unlike global supercontinents, were tectonically segregated. In this Review, we discuss how the emergence of supercontinents provides a minimum age for the onset of the modern global plate tectonic network, whereas Archaean supercratons might reflect an earlier geodynamic and nascent tectonic regime.

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Long-term cycles of the Solar System concealed in the Mesozoic sedimentary basin record

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Harmonic hierarchy of mantle and lithospheric convective cycles: Time series analysis of hafnium isotopes of zircon

Cited by 31 publications

References 55 publications

Potential encoding of coupling between Milankovitch forcing and Earth's interior processes in the Phanerozoic eustatic sea-level record

Potential encoding of coupling between Milankovitch forcing and Earth's interior processes in the Phanerozoic eustatic sea-level record

The supercontinent cycle

Long-term cycles of the Solar System concealed in the Mesozoic sedimentary basin record

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