Subduction history reveals Cretaceous slab superflux as a possible cause for the mid-Cretaceous plume pulse and superswell events

East, Madison; Müller, R. Dietmar; Williams, S.; Zahirovic, Sabin; Heine, Christian

doi:10.1016/j.gr.2019.09.001

Cited by 33 publications

(21 citation statements)

References 80 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although numerical simulations and laboratory experiments (Jellinek & Lenardic, ; Lenardic et al, ; Robin et al, ; Thayalan et al, ) show that the changing planform of mantle stirring during isolation and in an isolation‐to‐remixing regime can cause this volcanism to cluster in time after breakup, consistent with the Pangea proxy data in Figure , this behavior is inevitably sensitive to the geometric setup of any model and to the detailed planform of subducting slabs. Indeed, this sensitivity of the timing of LIP volcanism to the planform of subduction and MOR spreading is inferred from new plate motion models of Pangea breakup (East et al, ). A practical consequence is that it is not possible to reliably parameterize changes in this class of volcanism in terms of globally averaged values for

V_{s}

T_{m, o}

.…”

Section: Mantle Thermal Isolation‐to‐remixing and Global Volcanic Soumentioning

confidence: 93%

“…Plate reconstructions and geological data suggest that subduction zones probably encircled Rodinia and to a lesser extent Pangea by the time these supercontinents were each formed (e.g., East et al, ; Evans, ; Lee et al, ; Le Pichon et al, ; Li et al, ; Müller et al, ). Depending on the continuity, geometry, and age of subducting slabs, such a planform can have varied consequences for the character and extent of mantle thermal mixing.…”

Section: The Mantle Response To the Assembly And Breakup Of Supercontmentioning

confidence: 99%

“…To limit the model parameter space and not introduce additional degrees of freedom in the absence of similarly rigorous observational constraints for both epochs, we again take arc and MOR lengths to remain unchanged through the Pangean and Rodinian cycles. We neglect, for example, new plate motion modeling constraints suggesting that an increase in MOR length contributed to a factor of 2 increase in the flux of material subducted at continental arcs from 180 to 130 Ma (East et al, ). We also ignore contributions of crustal carbonate to magmatism and to topography production and weathering since Pangea breakup (Lee et al, , ).…”

Section: Supercontinental Climate Control In An Evolving Mantle Thermmentioning

confidence: 99%

See 2 more Smart Citations

Ice, Fire, or Fizzle: The Climate Footprint of Earth's Supercontinental Cycles

Jellinek

Lenardic

Pierrehumbert

2020

Geochem Geophys Geosyst

View full text Add to dashboard Cite

Supercontinent assembly and breakup can influence the rate and global extent to which insulated and relatively warm subcontinental mantle is mixed globally, potentially introducing lateral oceanic‐continental mantle temperature variations that regulate volcanic and weathering controls on Earth's long‐term carbon cycle for a few hundred million years. We propose that the relatively warm and unchanging climate of the Nuna supercontinental epoch (1.8–1.3 Ga) is characteristic of thorough mantle thermal mixing. By contrast, the extreme cooling‐warming climate variability of the Neoproterozoic Rodinia episode (1–0.63 Ga) and the more modest but similar climate change during the Mesozoic Pangea cycle (0.3–0.05 Ga) are characteristic features of the effects of subcontinental mantle thermal isolation with differing longevity. A tectonically modulated carbon cycle model coupled to a one‐dimensional energy balance climate model predicts the qualitative form of Mesozoic climate evolution expressed in tropical sea‐surface temperature and ice sheet proxy data. Applied to the Neoproterozoic, this supercontinental control can drive Earth into, as well as out of, a continuous or intermittently panglacial climate, consistent with aspects of proxy data for the Cryogenian‐Ediacaran period. The timing and magnitude of this cooling‐warming climate variability depends, however, on the detailed character of mantle thermal mixing, which is incompletely constrained. We show also that the predominant modes of chemical weathering and a tectonically paced abiotic methane production at mid‐ocean ridges can modulate the intensity of this climate change. For the Nuna epoch, the model predicts a relatively warm and ice‐free climate related to mantle dynamics potentially consistent with the intense anorogenic magmatism of this period.

show abstract

V_{s}

T_{m, o}

.…”

Section: Mantle Thermal Isolation‐to‐remixing and Global Volcanic Soumentioning

confidence: 93%

Section: The Mantle Response To the Assembly And Breakup Of Supercontmentioning

confidence: 99%

Section: Supercontinental Climate Control In An Evolving Mantle Thermmentioning

confidence: 99%

See 1 more Smart Citation

Ice, Fire, or Fizzle: The Climate Footprint of Earth's Supercontinental Cycles

Jellinek

Lenardic

Pierrehumbert

2020

Geochem Geophys Geosyst

View full text Add to dashboard Cite

show abstract

“…Overall, the Arc volcanism is at least partially controlled by volatiles, such as water and carbon, entering the subduction system. As a result, a key constraint of volatile input into the trench comes from quantifying the subducting plate area (East et al, 2020) over time. The three plate reconstructions presented here show similar trends in the subducting plate area for the post-Pangea timeframe, with a significant peak between ~160 and 120 Ma (Figure 8a).…”

Section: Resultsmentioning

confidence: 99%

Subduction and carbonate platform interactions

Zahirovic

Eleish

Doss

et al. 2022

Geoscience Data Journal

Self Cite

View full text Add to dashboard Cite

Plate tectonics, as the unifying theory in Earth sciences, controls the functioning of important planetary processes on geological timescales. Here, we present an open‐source workflow that interrogates community digital plate tectonic reconstructions, primarily in the context of the planetary deep carbon cycle. We present an updated plate tectonic reconstruction covering the last 400 million years of Earth evolution and explore components of the plate–mantle system that is involved in the exchange and storage of carbon. First, the workflow enables us to estimate subduction zone lengths through time, which represent the “tap” of carbon that is released at convergent tectonic margins. Second, we explore the role of Andean‐style versus intra‐oceanic subduction regimes during Pangea assembly and breakup. Third, we provide an improved model for carbonate platform evolution since the Devonian and evaluate the interaction of subduction zones and buried carbonate platforms. Last, we present a new model for estimating oceanic age, carbon content in the upper oceanic crust, and estimated (carbon‐containing) sediment thicknesses through time and present methods to track the subduction of this material through time. These components of the deep carbon cycle are key mechanisms controlling, or at least modulating, atmospheric CO2 on geological timescales and hence strongly influencing long‐term climate. We find that the mid to Late Cretaceous greenhouse climates were likely driven by increased subduction fluxes of volatiles and increased subduction zone interactions with carbonate platforms in the Tethyan tectonic domain. Our work highlights the importance of community digital plate tectonic reconstructions as a framework for studying key systems, such as the deep carbon cycle, that influence the life‐support mechanisms on our planet.

show abstract

“…What they show is the fact that mantle convection was unusually active during the CNS. East et al (2020) proposed that high subduction fluxes before the CNS caused the mantle return flow, which increased the activity of LIPs.…”

Section: Large Igneous Provincesmentioning

confidence: 99%

The Cretaceous Normal Superchron: A Mini-Review of Its Discovery, Short Reversal Events, Paleointensity, Paleosecular Variations, Paleoenvironment, Volcanism, and Mechanism

Yoshimura

2022

Front. Earth Sci.

View full text Add to dashboard Cite

The Cretaceous Normal Superchron (CNS) was first defined in the 1960s to explain the Cretaceous Quiet Zone in marine magnetic anomaly profiles, which includes no or fewer geomagnetic reversals. This ∼37 million years period is considered the most unique and extreme geomagnetic feature for the last 160 Myr. Superchrons may be caused by the geodynamo operating at peak efficiency with a unique heat flux at the core-mantle boundary (CMB). Previous studies suggest that the CNS is a sign of the connection between Earth’s interior and surface. During the CNS, the geomagnetic intensity may have fluctuated significantly, and the average may have changed with time, and the paleosecular variations had unique features. The warm climate around the CNS may have been caused by volcanic activity associated with active mantle convection. Such mantle convection increases heat flux at the CMB during the CNS, but geodynamo simulations predict small heat flux, which are inconsistent. This discrepancy may be resolved by the growth and collapse of a superplume or by an increase and decrease in the subduction flux.

show abstract

Subduction history reveals Cretaceous slab superflux as a possible cause for the mid-Cretaceous plume pulse and superswell events

Abstract: 14 15 16 Research Highlights: 17 18 65 transitions. 66 67 68

Cited by 33 publications

References 80 publications

Ice, Fire, or Fizzle: The Climate Footprint of Earth's Supercontinental Cycles

Ice, Fire, or Fizzle: The Climate Footprint of Earth's Supercontinental Cycles

Subduction and carbonate platform interactions

The Cretaceous Normal Superchron: A Mini-Review of Its Discovery, Short Reversal Events, Paleointensity, Paleosecular Variations, Paleoenvironment, Volcanism, and Mechanism

Contact Info

Product

Resources

About