Geological Society of America

T244 Integrated Tectono-Sedimentary Records in the Tibetan Plateau and Adjacent Areas

Wednesday, 25 September 2019
8:00 AM - 12:00 PM
Room 231ABC, North Building

MONSOONS VS. WESTERLIES DURING TIBETAN PLATEAU GROWTH AND GREENHOUSE-ICEHOUSE TRANSITION

Paper number: T244-15
Program: Technical Sessions
Time: 11:40 AM – 12:00 PM

Authors

Guillaume Dupont-Nivet Presenting Author
Potsdam University, Potsdam-Golm
Fernando Poblete
Universidad de O'Higgins, Rancagua
Pierrick Roperch
Université de Rennes1, Rennes
Carina Hoorn
University of Amsterdam, Amsterdam
Jean-Noel Proust
CNRS/Universite de Rennes, 35042 Rennes cedex, N/A
Frederic Fluteau
Institut de physique du globe de Paris, Paris
Yannick Donnadieu
CEREGE, Aix en Provence, CA
Niels Meijer
Potsdam University, Potsdam-Golm
Mustafa Kaya
Potsdam University, Potsdam-Golm
Delphine Tardif
Institut de Physique du Globe de Paris, Paris
Lin Li
University of Arizona, Tucson, AZ
Alexis Licht
University of Washington, Seattle, WA
Natasha Barbolini
University of Stockholm, Stockholm
Alexander Rohrmann
Universitaet Potsdam, Potsdam
Jovid Aminov
Potsdam University, Potsdam-Golm

Abstract

The ongoing surge of international research on sedimentary basins from the Himalayan-Tibetan orogen and surrounding regions enable to better constrain the geodynamic setting of the India-Asia collision and the associated tectonic growth of the Tibetan Plateau. Consequently, we can now better assess interactions between these forcing mechanisms and Asian paleoenvironmental changes (monsoons, aridification), land-sea distribution, surface processes, paleobiogeographic evolution and the global carbon cycle. We review here some results from the ERC MAGIC project (Monsoons in Asia caused Greenhouse to Icehouse Change?) integrating regional geodynamic constraints, well-dated paleoenvironmental proxy records and climate modelling. MAGIC focuses on the Paleogene period that includes the early collision and plateau growth, associated regional development of monsoons and westerlies over the proto-Paratethys sea and the global Greenhouse to Icehouse cooling. We report well-dated stratigraphic results integrating palynology, stable isotope, provenance and facies analyses from a continuous 51-25 Ma lacustrine record from NE Tibet (Xining Basin) that are compared to Tarim and Tajik Basin records of the proto-Paratethys sea fluctuations and the Pamir tectonic evolution. Together these results allow for a comprehensive paleogeographic and paleoenvironmental reconstructions that are used to constrain initial climate modelling experiments which permit validation of hypotheses on paleoenvironment-climate interactions during this key period.

Geological Society of America Abstracts with Programs. Vol. 51, No. 5

doi: 10.1130/abs/2019AM-338825

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