Zircon dating ties NE Atlantic sill emplacement to initial Eocene global warming
Henrik Svensen
Sverre Planke
Fernando Corfu
10.6084/m9.figshare.3454796.v1
https://geolsoc.figshare.com/articles/journal_contribution/Zircon_dating_ties_NE_Atlantic_sill_emplacement_to_initial_Eocene_global_warming/3454796
<p>The Earth experienced rapid greenhouse gas induced global warming during the Palaeocene–Eocene thermal maximum (PETM). The
source of the gas is, however, debated. We have, for the first time, determined the ages of magmatic sills in the Vøring Basin
offshore Norway. Zircon U–Pb ages of 55.6 ± 0.3 and 56.3 ± 0.4 Ma demonstrate that sill emplacement was synchronous with the
PETM within small errors. This discovery strengthens the hypothesis that global warming was triggered by rapid release of
greenhouse gases generated by heating of organic-rich sediments around intrusions in the NE Atlantic rather than from dissociation
of gas hydrates.
</p>
2016-06-21 12:21:20
PETM
sill emplacement
NE Atlantic
greenhouse gases
ties NE Atlantic sill emplacement
gas hydrates
greenhouse gas
Zircon
warming
magmatic sills
Geology