Shallow-water hydrothermal venting linked to the Palaeocene–Eocene Thermal Maximum - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Nature Geoscience Année : 2023

Shallow-water hydrothermal venting linked to the Palaeocene–Eocene Thermal Maximum

Christian Berndt
Sverre Planke
Carlos Alvarez Zarikian
Joost Frieling
Morgan Jones
John Millett
Henk Brinkhuis
Stefan Bünz
Henrik Svensen
  • Fonction : Auteur
Jack Longman
Reed Scherer
Jens Karstens
Ben Manton
Mei Nelissen
Brandon Reed
  • Fonction : Auteur
Jan Inge Faleide
Ritske Huismans
Amar Agarwal
Graham Andrews
Peter Betlem
Joyeeta Bhattacharya
  • Fonction : Auteur
Sayantani Chatterjee
Marialena Christopoulou
  • Fonction : Auteur
Vincent Clementi
Eric Ferré
Irina Filina
Pengyuan Guo
Dustin Harper
  • Fonction : Auteur
Sarah Lambart
Geoffroy Mohn
Reina Nakaoka
  • Fonction : Auteur
Christian Tegner
Natalia Varela
Mengyuan Wang
Weimu Xu
Stacy Yager
  • Fonction : Auteur

Résumé

Abstract The Palaeocene–Eocene Thermal Maximum (PETM) was a global warming event of 5–6 °C around 56 million years ago caused by input of carbon into the ocean and atmosphere. Hydrothermal venting of greenhouse gases produced in contact aureoles surrounding magmatic intrusions in the North Atlantic Igneous Province have been proposed to play a key role in the PETM carbon-cycle perturbation, but the precise timing, magnitude and climatic impact of such venting remains uncertain. Here we present seismic data and the results of a five-borehole transect sampling the crater of a hydrothermal vent complex in the Northeast Atlantic. Stable carbon isotope stratigraphy and dinoflagellate cyst biostratigraphy reveal a negative carbon isotope excursion coincident with the appearance of the index taxon Apectodinium augustum in the vent crater, firmly tying the infill to the PETM. The shape of the crater and stratified sediments suggests large-scale explosive gas release during the initial phase of vent formation followed by rapid, but largely undisturbed, diatomite-rich infill. Moreover, we show that these vents erupted in very shallow water across the North Atlantic Igneous Province, such that volatile emissions would have entered the atmosphere almost directly without oxidation to CO 2 and at the onset of the PETM.

Dates et versions

hal-04603848 , version 1 (06-06-2024)

Identifiants

Citer

Christian Berndt, Sverre Planke, Carlos Alvarez Zarikian, Joost Frieling, Morgan Jones, et al.. Shallow-water hydrothermal venting linked to the Palaeocene–Eocene Thermal Maximum. Nature Geoscience, 2023, 16 (9), pp.803-809. ⟨10.1038/s41561-023-01246-8⟩. ⟨hal-04603848⟩

Collections

UNIV-CERGY
4 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Mastodon Facebook X LinkedIn More