Did high Neo-Tethys subduction rates contribute to early Cenozoic warming?

Hoareau, Guilhem; Bomou, Brahimsamba; Hinsbergen, Douwe J.J. van; Carry, Nicolas; Marquer, Didier; Donnadieu, Yannick; Hir, Guillaume Le; Vrielynck, Bruno; Walter-Simonnet, Anne-Véronique

doi:10.5194/cp-11-1751-2015

Cited by 23 publications

(10 citation statements)

References 101 publications

(197 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Similarly, Kerrick and Caldeira () suggested that carbon degassing due to metamorphism of Indian margin rocks along the Himalayan belt enhanced paleoatmospheric carbon levels, although revised estimates point to a minor contribution to early Eocene warming (Kerrick & Caldeira, ). A reduction of carbon dioxide emissions is inferred between ~50 and 40 Ma, synchronous with the observed phase of climate cooling, when Tibetan arc volcanism was waning after collision between India and Eurasia (Hoareau et al, ; Jagoutz et al, ; Figure ).…”

Section: Solid Earth Control On Cenozoic Climate Coolingmentioning

confidence: 89%

“…The short‐lived magmatic flare‐up is in striking coincidence with the Early‐Eocene Climate Optimum, suggesting a cause‐effect relationship between the magmatic and climatic event, a possibility that was only marginally investigated thus far. Subduction of the carbonate‐rich Indian passive margin succession in the middle Paleocene may have enhanced carbon recycling at the Transhimalayan volcanic arc (e.g., Kent & Muttoni, ; van Hinsbergen et al, ; Hoareau et al, ). Hoareau et al () modeled the volume of subducted materials and the amount of CO 2 emitted along the northern Tethyan margin and the effects of estimated CO 2 fluxes on global climate.…”

Section: Solid Earth Control On Cenozoic Climate Coolingmentioning

confidence: 99%

“…Subduction of the carbonate‐rich Indian passive margin succession in the middle Paleocene may have enhanced carbon recycling at the Transhimalayan volcanic arc (e.g., Kent & Muttoni, ; van Hinsbergen et al, ; Hoareau et al, ). Hoareau et al () modeled the volume of subducted materials and the amount of CO 2 emitted along the northern Tethyan margin and the effects of estimated CO 2 fluxes on global climate. Enhanced CO 2 degassing due to subduction of thicker Indian continental margin sediments after ~60 Ma would raise surface temperatures to some extent, consistently with the observed early Eocene climate warming.…”

Section: Solid Earth Control On Cenozoic Climate Coolingmentioning

confidence: 99%

See 2 more Smart Citations

Magmatic Forcing of Cenozoic Climate?

et al. 2020

View full text Add to dashboard Cite

Established theories ascribe much of the observed long-term Cenozoic climate cooling to atmospheric carbon consumption by erosion and weathering of tectonically uplifted terrains, but climatic effects due to changes in magmatism and carbon degassing are also involved. At timescales comparable to those of Milankovitch cycles, late Cenozoic building/melting of continental ice sheets, erosion, and sea level changes can affect magmatism, which provides an opportunity to explore possible feedbacks between climate and volcanic changes. Existing data show that extinction of Neo-Tethyan volcanic arcs is largely synchronous with phases of atmospheric carbon reduction, suggesting waning degassing as a possible contribution to climate cooling throughout the early to middle Cenozoic. In addition, the increase in atmospheric CO 2 concentrations during the last deglaciation may be ascribed to enhanced volcanism and carbon emissions due to unloading of active magmatic provinces on continents. The deglacial rise in atmospheric CO 2 points to a mutual feedback between climate and volcanism mediated by the redistribution of surface masses and carbon emissions. This may explain the progression to higher amplitude and increasingly asymmetric cycles of late Cenozoic climate oscillations. Unifying theories relating tectonic, erosional, climatic, and magmatic changes across timescales via the carbon cycle offer an opportunity for future research into the coupling between surface and deep Earth processes. Plain Language Summary Among the most fascinating contemporary developments in theEarth Sciences is the idea that plate tectonics and climate changes are coupled through complex cycles. More than four decades of study have revealed tantalizing examples of relationships between processes near the Earth's surface and deeper within. Accounting for such a surface-deep Earth process coupling has improved our understanding of major climate and tectonic events for virtually all timescales. So far, however, the role of magmatism was overlooked. Magmatism exerts a strong influence on the amount of greenhouse gasses in the atmosphere because of volcanic outgassing. In turn, tectonic and climatic changes control the transfer of rocks, water, and ice masses at the Earth surface and within the Earth's interior, thereby affecting the production, transfer, and eruption of magmas. Unravelling the interactions between surface and deep Earth processes accounting for magmatism will help managing natural resources and mitigating natural hazards. Even more importantly, understanding how climate is naturally related to plate tectonics and magmatism will allow scientists to assess the anthropogenic perturbations to the Earth system and anticipate ongoing and future climate changes.

show abstract

Section: Solid Earth Control On Cenozoic Climate Coolingmentioning

confidence: 89%

Section: Solid Earth Control On Cenozoic Climate Coolingmentioning

confidence: 99%

Section: Solid Earth Control On Cenozoic Climate Coolingmentioning

confidence: 99%

See 1 more Smart Citation

Magmatic Forcing of Cenozoic Climate?

et al. 2020

View full text Add to dashboard Cite

show abstract

“…If arc volcanoes, associated with subduction zones, provide a quick return of materials to the surface, the direct melting of oceanic crust may increase the amount of fluid released, suggesting a recycling of suducted carbon higher than today. According to this assumption, the decarbonation efficiency may exceed Cenozoic values used as reference [Hoareau et al, 2015]. We thus explored the effect of the recycling (R) using the Cenozoic value as reference (R=0.1, corresponding to a recycling efficiency of 10%) and values 3 times higher (R=0.3, a recycling efficiency of 30%).…”

Section: Model Set-up and Boundary Conditionsmentioning

confidence: 99%

A warm or a cold early Earth? New insights from a 3-D climate-carbon model

Charnay

Hir

Fluteau

et al. 2017

Earth and Planetary Science Letters

View full text Add to dashboard Cite

Oxygen isotopes in marine cherts have been used to infer hot oceans during the Archean with temperatures between 60• C (333 K) and 80• C (353 K). Such climates are challenging for the early Earth warmed by the faint young Sun. The interpretation of the data has therefore been controversial. 1D climate modeling inferred that such hot climates would require very high levels of CO 2 (2-6 bars). Previous carbon cycle modeling concluded that such stable hot climates were impossible and that the carbon cycle should lead to cold climates during the Hadean and the Archean. Here, we revisit the climate and carbon cycle of the early Earth at 3.8 Ga using a 3D climate-carbon model. We find that CO 2 partial pressures of around 1 bar could have produced hot climates given a low land fraction and cloud feedback effects. However, such high CO 2 partial pressures should not have been stable because of the weathering of terrestrial and oceanic basalts, producing an efficient stabilizing feedback. Moreover, the weathering of impact ejecta during the Late Heavy Bombardment (LHB) would have strongly reduced the CO 2 partial pressure leading to cold climates and potentially snowball Earth events after large impacts. Our results therefore favor cold or temperate climates with global mean temperatures between around 8• C (281 K) and 30• C (303 K) and with 0.1-0.36 bar of CO 2 for the late Hadean and early Archean. Finally, our model suggests that the carbon cycle was efficient for preserving clement conditions on the early Earth without necessarily requiring any other greenhouse gas or warming process.

show abstract

“…The India plate drifted at a high velocity with the simultaneous counterclockwise rotation until its collision with Eurasia in the Paleocene-Eocene. Although the timing of collisions of Africa-Arabia and India with Eurasia is slightly different, both Africa-Arabia and India plates show consistent counterclockwise rotation with the same angular velocity (Hoareau et al, 2015). The whole process can be concluded as that both the Africa-Arabia and India plates rotated counterclockwise around the Euler pole of northwest Africa, which led to the final closure of the Neo-Tethys Ocean.…”

Section: Plate Rotation In Non-free Boundary Conditions Controls Evol...mentioning

confidence: 91%

Tectonic evolution and geodynamics of the Neo-Tethys Ocean

Zhu

Zhao

2021

Sci. China Earth Sci.

View full text Add to dashboard Cite

The Neo-Tethys Ocean was an eastward-gaping triangular oceanic embayment between Laurasia to the north and Gondwana to the south. The Neo-Tethys Ocean was initiated from the Early Permian with mircoblocks rifted from the northern margin of Gondwana. As the microblocks drifted northwards, the Neo-Tethys Ocean was expanded. Most of these microblocks collided with the Eurasia continent in the Late Triassic, leading to the final closure of the Paleo-Tethys Ocean, followed by oceanic subduction of the Neo-Tethys oceanic slab beneath the newly formed southern margin of the Eurasia continent. As the splitting of Gondwana continued, African-Arabian, Indian and Australian continents were separated from Gondwana and moved northwards at different rates. Collision of these blocks with the Eurasia continent occurred at different time during the Cenozoic, resulting in the closure of the Neo-Tethys Ocean and building of the most significant Alps-Zagros-Himalaya orogenic belt on Earth. The tectonic evolution of the Neo-Tethys Ocean shows different characteristics from west to east: Multi-oceanic basins expansion, bidirectional subduction and microblocks collision dominate in the Mediterranean region; northward oceanic subduction and diachronous continental collision along the Zagros suture occur in the Middle East; the Tibet and Southeast Asia are characterized by multi-block riftings from Gondwana and multi-stage collisions with the Eurasia continent. The negative buoyancy of subducting oceanic slabs can be considered as the main engine for northward drifting of Gondwana-derived blocks and subduction of the Neo-Tethys Ocean. Meanwhile, mantle convection and counterclockwise rotation of Gondwana-derived blocks and the Gondwana continent around an Euler pole in West Africa in non-free boundary conditions also controlled the evolution of the Neo-Tethys Ocean.

show abstract

Did high Neo-Tethys subduction rates contribute to early Cenozoic warming?

Cited by 23 publications

References 101 publications

Magmatic Forcing of Cenozoic Climate?

Magmatic Forcing of Cenozoic Climate?

A warm or a cold early Earth? New insights from a 3-D climate-carbon model

Tectonic evolution and geodynamics of the Neo-Tethys Ocean

Contact Info

Product

Resources

About