Environmental Magnetic Signature of the Selandian-Thanetian Transition Event (STTE) and Early Late Paleocene Event (ELPE) in the Contessa Road Section (Italy)

Environmental Magnetic Signature of the Selandian-Thanetian Transition Event (STTE) and Early Late Paleocene Event (ELPE) in the Contessa Road Section (Italy)

Geophysical Research Abstracts Vol. 21, EGU2019-18311, 2019 EGU General Assembly 2019 © Author(s) 2019. CC Attribution 4.0 license. Environmental magnetic signature of the Selandian-Thanetian Transition Event (STTE) and Early Late Paleocene Event (ELPE) in the Contessa Road section (Italy) Jairo Savian (1), Rodolfo Coccioni (2), Fabrizio Frontalini (2), Rita Catanzariti (3), Luigi Jovane (4), Daniel Rodelli (4), Ianco Rodrigues (4), Martino Giorgioni (5), and Bruno Galbrun (6) (1) Universidade Federal do Rio Grande do Sul, Instituto de Geociências, Departamento de Geologia, Porto Alegre, Brazil ([email protected]), (2) Università degli Studi di Urbino “Carlo Bo”, Dipartimento di Scienze Pure e Applicate, Campus Scientifico, Località Crocicchia, Urbino, Italy, (3) Istituto di Geoscienze e Georisorse CNR, Pisa, Italy, (4) Universidade de São Paulo, Departamento de Oceanografia Física, Instituto Oceanográfico, São Paulo, Brazil, (5) Universidade de Brasília, Instituto de Geociências, Brasília, Brazil, (6) Université Paris VI, CNRS–UMR 7193, ISTeP ‘Institut des Sciences de la Terre-Paris’, Paris, France The Early Cenozoic has been experienced a ∼350-kyr-long hyperthermal event of environmental disruption, not described before and here named Selandian–Thanetian Transition Event (STTE), has been recognized and well constrained in the western Tethys Contessa Road section (Gubbio, Italy). The STTE exhibits distinct magnetic properties of sediments that record the STTE at Contessa, as low magnetic susceptibility and decrease in total fer- romagnetic mineral content are consistent with reductive dissolution. However, we also document two components in the isothermal remanent magnetization (IRM) and First-Order Reversal Curves (FORC) diagrams that suggest the occurrence of biogenic magnetite throughout the STTE, indicating that the occurrence of magnetofossils is not due to a preservation effect. Systematic variations in magnetic parameters are consistent with increased ocean primary productivity during the STTE, which induced higher populations of magnetotactic bacteria through in- creased terrigenous input and, therefore, increased nutrient supply. Noteworthy, the uppermost part of the STTE includes the equivalent of the suspected hyperthermal, short-lived Early Late Paleocene Event (ELPE). The ELPE event shows an episode of increase in magnetic properties of the sediments, including an increase in magnetofossil concentration, as indicated by IRM components and FORC diagrams..

View Full Text

Details

  • File Type
    pdf
  • Upload Time
    -
  • Content Languages
    English
  • Upload User
    Anonymous/Not logged-in
  • File Pages
    1 Page
  • File Size
    -

Download

Channel Download Status
Express Download Enable

Copyright

We respect the copyrights and intellectual property rights of all users. All uploaded documents are either original works of the uploader or authorized works of the rightful owners.

  • Not to be reproduced or distributed without explicit permission.
  • Not used for commercial purposes outside of approved use cases.
  • Not used to infringe on the rights of the original creators.
  • If you believe any content infringes your copyright, please contact us immediately.

Support

For help with questions, suggestions, or problems, please contact us