Release of methane from a volcanic basin as a mechanism for initial Eocene global warming

  title={Release of methane from a volcanic basin as a mechanism for initial Eocene global warming},
  author={Henrik H. Svensen and Sverre Planke and Anders Malthe‐S{\o}renssen and Bj{\o}rn Jamtveit and Reidun Myklebust and Torfinn Rasmussen Eidem and Sebastian Scheel Rey},
A 200,000-yr interval of extreme global warming marked the start of the Eocene epoch about 55 million years ago. Negative carbon- and oxygen-isotope excursions in marine and terrestrial sediments show that this event was linked to a massive and rapid (∼10,000 yr) input of isotopically depleted carbon. It has been suggested previously that extensive melting of gas hydrates buried in marine sediments may represent the carbon source and has caused the global climate change. Large-scale hydrate… 

Mobilization of lithospheric mantle carbon during the Palaeocene-Eocene thermal maximum

The early Cenozoic exhibited profound environmental change influenced by plume magmatism, continental breakup, and opening of the North Atlantic Ocean. Global warming culminated in the transient

Transient mobilization of subcrustal carbon coincident with Palaeocene–Eocene Thermal Maximum

Plume magmatism and continental breakup led to the opening of the northeast Atlantic Ocean during the globally warm early Cenozoic. This warmth culminated in a transient (170 thousand year, kyr)

Very large release of mostly volcanic carbon during the Paleocene-Eocene Thermal Maximum

Boron isotope data are presented that show that the ocean surface pH was persistently low during the PETM, and enhanced burial of organic matter seems to have been important in eventually sequestering the released carbon and accelerating the recovery of the Earth system.

Volcanic controls on seawater sulfate over the past 120 million years

It is demonstrated that the sulfur outgassing associated with emplacement of large igneous provinces can produce the apparent stepwise jumps in the isotopic record when coupled to long-term changes in burial efficiency.

Paleocene/Eocene carbon feedbacks triggered by volcanic activity

Elevated levels of mercury relative to organic carbon are reported directly preceding and within the early PETM from two North Sea sedimentary cores, signifying pulsed volcanism from the North Atlantic Igneous Province likely provided the trigger and subsequently sustained elevated CO2.

Thermogenic methane release as a cause for the long duration of the PETM

Evidence of carbon release during the PETM from a reservoir is provided and implies that carbon release from the vent systems should be included in all future considerations regarding PETM carbon cycling.

Seawater oxygenation during the Paleocene-Eocene Thermal Maximum

Uncertainty over the trajectory of seawater oxygenation in the coming decades is of particular concern in the light of geological episodes of abrupt global warming that were frequently accompanied by

Peraluminous igneous rocks as an indicator of thermogenic methane release from the North Atlantic Volcanic Province at the time of the Paleocene–Eocene Thermal Maximum (PETM)

  • M. Rampino
  • Geology, Environmental Science
    Bulletin of Volcanology
  • 2013
Unusual cordierite-bearing peraluminous dacites, produced by melting of organic-rich sediments by intrusion of basaltic magma, are found within the North Atlantic Volcanic Province (NAVP).



Dissociation of oceanic methane hydrate as a cause of the carbon isotope excursion at the end of the Paleocene

Isotopic records across the “Latest Paleocene Thermal Maximum“ (LPTM) indicate that bottom water temperature increased by more than 4°C during a brief time interval (<104 years) of the latest

Global dinoflagellate event associated with the late Paleocene thermal maximum

The late Paleocene thermal maximum, or LPTM (ca. 55 Ma), represents a geologically brief time interval (∼220 k.y.) characterized by profound global warming and associated environmental change. The

A blast of gas in the latest Paleocene: simulating first-order effects of massive dissociation of oceanic methane hydrate.

Significant CH4 release from oceanic hydrates is a plausible explanation for observed carbon cycle perturbations during the thermal maximum because the flux of CH4 invoked during the maximum is of similar magnitude to that released to the atmosphere from present-day anthropogenic CH4 sources.

The mid-Cretaceous super plume, carbon dioxide, and global warming.

A carbonate-silicate cycle model developed finds that CO2 emissions resulting from super-plume tectonics could have produced atmospheric CO2 levels from 3.7 to 14.7 times the modern pre-industrial value of 285 ppm, which would cause a global warming of from 2.8 to 7.7 degrees C over today's global mean temperature.

North Atlantic volcanic margins: Dimensions and production rates

Early Tertiary lithospheric breakup between Eurasia and Greenland was accompanied by a transient (∼3 m.y.) igneous event emplacing both the onshore flood basalts of the North Atlantic Volcanic

Methane escape from gas hydrate systems in marine environment, and methane‐driven oceanic eruptions

Huge quantities of CH4 are stored in marine sediment in the form of methane hydrate, bubbles, and dissolved CH4 in pore water. Here I discuss the various pathways for methane to enter the ocean and

Hydrothermal vent complexes associated with sill intrusions in sedimentary basins

Abstract Subvolcanic intrusions in sedimentary basins cause strong thermal perturbations and frequently cause extensive hydrothermal activity. Hydrothermal vent complexes emanating from the tips of

Environmental impact of volcanic margin formation

Tectonism and magmatism during NE Atlantic continental break-up: the Vøring Margin

Abstract The temporal and spatial relationships of tectonic and magmatic features on the Vøring volcanic margin show that continental break-up occurred in association with significant magmatic

Seep carbonate formation controlled by hydrothermal vent complexes: a case study from the Vøring Basin, the Norwegian Sea

Several hundred hydrothermal vent complexes were formed in the Vøring Basin as a consequence of magmatic sill emplacement in the late Palaeocene. The 6607/12-1 exploration well was drilled through a