Release of methane from a volcanic basin as a mechanism for initial Eocene global warming
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- 1 June 2004
- journal article
- Published by Springer Science and Business Media LLC in Nature
- Vol. 429 (6991), 542-545
- https://doi.org/10.1038/nature02566
Abstract
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 (approximately 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 melting, however, requires a hitherto unknown triggering mechanism. Here we present evidence for the presence of thousands of hydrothermal vent complexes identified on seismic reflection profiles from the Vøring and Møre basins in the Norwegian Sea. We propose that intrusion of voluminous mantle-derived melts in carbon-rich sedimentary strata in the northeast Atlantic may have caused an explosive release of methane--transported to the ocean or atmosphere through the vent complexes--close to the Palaeocene/Eocene boundary. Similar volcanic and metamorphic processes may explain climate events associated with other large igneous provinces such as the Siberian Traps (approximately 250 million years ago) and the Karoo Igneous Province (approximately 183 million years ago).Keywords
This publication has 22 references indexed in Scilit:
- Seismic characteristics and distribution of volcanic intrusions and hydrothermal vent complexes in the Vøring and Møre basinsGeological Society, London, Petroleum Geology Conference series, 2005
- New technique for dating igneous sillsGeology, 2003
- The properties, morphology and distribution of igneous sills: modelling, borehole data and 3D seismic from the Faroe-Shetland areaGeological Society, London, Special Publications, 2002
- High‐velocity breakup‐related sills in the Vøring Basin, off NorwayJournal of Geophysical Research, 2000
- The tectonic evolution of the Norwegian Sea Continental Margin with emphasis on the Vøring and Møre BasinsGeological Society, London, Special Publications, 2000
- Dissociation of oceanic methane hydrate as a cause of the carbon isotope excursion at the end of the PaleocenePaleoceanography and Paleoclimatology, 1995
- Diapiric ascent of magmas through power law crust and mantleJournal of Geophysical Research, 1994
- North Atlantic volcanic margins: Dimensions and production ratesJournal of Geophysical Research, 1994
- Environmental impact of volcanic margin formationEarth and Planetary Science Letters, 1993
- The Mid‐Cretaceous Super Plume, carbon dioxide, and global warmingGeophysical Research Letters, 1991