EGU2020-18291
https://doi.org/10.5194/egusphere-egu2020-18291
EGU General Assembly 2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Asian paleoenvironments, paleogeography and paleobiodiversity interactions during the Greenhouse-Icehouse transition

Guillaume Dupont-Nivet1,2, Niels Meijer1, Mustafa Kaya1, Jan Westerweel2, Delphine Tardif3, Natasha Barbolini4, Alexander Rohrmann1, Jovid Aminov5, Diego Ruiz1, Amber Woutersen4, Huansheng Huang4, Fernando Poblete6, Alexis Licht7, Pierrick Roperch2, Carina Hoorn4, Jean-Noël Proust2, Frederic Fluteau3, Yannick Donnadieu8, and Stéphane Guillot9
Guillaume Dupont-Nivet et al.
  • 1CNRS - Potsdam University, Institute of Geosciences, Potsdam - Golm, Germany (guillaume.dupont-nivet@univ-rennes1.fr)
  • 2CNRS - Geosciences Rennes, Univ Rennes, France
  • 3Institut de Physique du Globe de Paris, Paris, France
  • 4Department of Ecosystem & Landscape Dynamics, Institute for Biodiversity & Ecosystem Dynamics (IBED), University of Amsterdam, The Netherlands
  • 5Institute of geology, earthquake engineering and seismology, Academy of Sciences of the Republic of Tajikistan
  • 6Instituto de Ciencias de la Ingeniería, Universidad de O’Higgins, Rancagua, Chile
  • 7Dept. Earth and Space Sciences, University of Washington, Seattle, United States
  • 8Centre Européen de Recherche et d'Enseignement de Géosciences de l'Environnement, CEREGE - Aix-Marseille Univ, Aix en Provence, France
  • 9Institut des Sciences de la Terre, Université Grenoble Alpes, France

The ongoing surge of international research on Asian Climate and Tectonics enables to better assess interactions between forcing mechanisms (global climate, India-Asia collision, Tibetan Plateau growth) and paleoenvironmental changes (monsoons, aridification), land-sea distribution, surface processes, paleobiogeographic evolution and the global carbon cycle. We review here the progress of the ERC MAGIC project (Monsoons in Asia caused Greenhouse to Icehouse Change?) integrating regional geodynamic constraints, well-dated environmental / biodiversity records and climate modeling. MAGIC focuses on the Paleogene period that includes the global Greenhouse to Icehouse cooling, the early collision and plateau growth and associated regional development of monsoons and westerlies over the Proto-Paratethys sea. Our work focuses on three areas constraining Asian paleoenvironments. (1) In Myanmar, paleomagnetic results, new dating of magmatic rocks and sediments along with additional detrital geochronology and basin analysis of the Burmese subduction margin and implications for the history of India-Asia convergence. (2) Along the Northeastern Tibetan Plateau margin, the combination of multiple proxies (leaf wax stable isotope, pollen, grain size, etc…)  applied to an extended lacustrine Paleogene record enables to identify precisely Asian climate changes and their consequences on ecosystems. (3) In westernmost China and Tajikistan, the proto-Paratethys sea fluctuations and the sedimentary records of Pamir tectonic evolution are now precisely dated enabling to constrain driving mechanisms and paleoenvironmental consequences. Together these results are used to constrain climate modeling experiments which permit validation of hypotheses on interactions between paleogeography, paleoenvironments and paleobiodiversity at Asian and global scales in response to long-term and short-term events.

How to cite: Dupont-Nivet, G., Meijer, N., Kaya, M., Westerweel, J., Tardif, D., Barbolini, N., Rohrmann, A., Aminov, J., Ruiz, D., Woutersen, A., Huang, H., Poblete, F., Licht, A., Roperch, P., Hoorn, C., Proust, J.-N., Fluteau, F., Donnadieu, Y., and Guillot, S.: Asian paleoenvironments, paleogeography and paleobiodiversity interactions during the Greenhouse-Icehouse transition , EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-18291, https://doi.org/10.5194/egusphere-egu2020-18291, 2020

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