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Leif Johansson

Leif Johansson

Professor

Leif Johansson

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

Summary, in 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.

Department/s

  • Lithosphere and Biosphere Science

Publishing year

2015

Language

English

Pages

387-390

Publication/Series

Geology

Volume

43

Issue

5

Document type

Journal article

Publisher

Geological Society of America

Topic

  • Geology

Status

Published

ISBN/ISSN/Other

  • ISSN: 0091-7613