Central atlantic magmatic provinces; Large igneous provinces; Magmatic intrusions; Mass extinction; Multiple levels; Sedimentary strata; Seismic activity; Soft-sediment deformation; Geology
Abstract :
[en] 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.
Disciplines :
Earth sciences & physical geography
Author, co-author :
Lindström, Sofie; GEUS-Geological Survey of Denmark and Greenland, Copenhagen K, Denmark
Pedersen, Gunver Krarup; GEUS-Geological Survey of Denmark and Greenland, Copenhagen K, Denmark
Van De Schootbrugge, Bas; Institute of Earth Sciences, Utrecht University, CS Utrecht, Netherlands
Hansen, Katrine Hovedskov; Department of Geosciences and Natural Resource Management, University of Copenhagen, Copenhagen K, Denmark
KUHLMANN, Natascha ; University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Engineering (DoE) ; Steinmann Institute for Geology, Mineralogy and Palaeontology, University of Bonn, Bonn, Germany
Thein, Jean; Steinmann Institute for Geology, Mineralogy and Palaeontology, University of Bonn, Bonn, Germany
Johansson, Leif; Department of Geology, Lund University, Lund, Sweden
Petersen, Henrik Ingermann; Maersk Oil, Exploration, Copenhagen K, Denmark
Alwmark, Carl; Department of Geology, Lund University, Lund, Sweden
Dybkjær, Karen; GEUS-Geological Survey of Denmark and Greenland, Copenhagen K, Denmark
Weibel, Rikke; GEUS-Geological Survey of Denmark and Greenland, Copenhagen K, Denmark
Erlström, Mikael; Geological Survey of Sweden, Lund, Sweden
Nielsen, Lars Henrik; GEUS-Geological Survey of Denmark and Greenland, Copenhagen K, Denmark
Oschmann, Wolfgang; Institute of Geosciences, Goethe University Frankfurt, Frankfurt am Main, Germany
Tegner, Christian; Department of Geoscience, Aarhus University, Aarhus C, Denmark
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