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Intense and widespread seismicity during the end-Triassic mass extinction due to emplacement of a large igneous province

Author:
  • Sofie Lindstrom
  • Gunver Krarup Pedersen
  • Bas van de Schootbrugge
  • Katrine Hovedskov Hansen
  • Natascha Kuhlmann
  • Jean Thein
  • Leif Johansson
  • Henrik Ingermann Petersen
  • Carl Alwmark
  • Karen Dybkjaer
  • Rikke Weibel
  • Mikael Erlstrom
  • Lars Henrik Nielsen
  • Wolfgang Oschmann
  • Christian Tegner
Publishing year: 2015
Language: English
Pages: 387-390
Publication/Series: Geology
Volume: 43
Issue: 5
Document type: Journal article
Publisher: Geological Society of America

Abstract english

Multiple levels of earthquake-induced soft-sediment deformations (seismites) are concentrated in the end-Triassic mass extinction interval across Europe. The repetitive nature of the seismites rules out an origin by an extraterrestrial impact. Instead, this intense seismic activity is linked to the formation of the Central Atlantic magmatic province (CAMP). By the earliest Jurassic the seismic activity had ceased, while extrusive volcanism still continued and biotic recovery was on its way. This suggests that magmatic intrusions into sedimentary strata during early stages of CAMP formation caused emission of gases (SO2, halocarbons, polycyclic aromatic hydrocarbons) that may have played a major part in the biotic crisis.

Keywords

  • Geology

Other

Published
  • ISSN: 0091-7613
Leif Johansson
E-mail: leif [dot] johansson [at] geol [dot] lu [dot] se

Professor

Lithosphere and Biosphere Science

+46 46 222 98 87

+46 70 530 76 73

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