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SUMMARY:The interplay of deep Earth and surface processes shaping Southeas
 t Asia and the Australian continents - Sabin Zahirovic -- University of Sy
 dney
DTSTART:20230531T110000Z
DTEND:20230531T120000Z
UID:TALK201055@talks.cam.ac.uk
CONTACT:Megan Holdt
DESCRIPTION:It is now well-established that mantle convection and mantle p
 rocesses influence Earth’s surface. However\, it becomes important to ca
 refully consider the timing and mechanisms that might drive these processe
 s. For Southeast Asia\, a significant Cretaceous-Eocene regional unconform
 ity had been interpreted as a long hiatus in subduction along the southern
  Sundaland margin. I present work\, namely forward geodynamic models of dy
 namic topography\, that reconcile these surface observations with a shorte
 r (~10-15 Myr) hiatus in subduction\, which better explains the geological
  and geodynamic history of this region. In the case of the Cretaceous-age 
 Eromanga Sea in Australia\, new landscape evolution models suggest that dy
 namic topography plays a secondary role to lithospheric flexure and eustat
 ic sea level. These examples highlight the need for numerical modelling ap
 proaches\, and robust geological constraints\, that allow us to test scena
 rios and evaluate the time-evolving dominance of key mechanisms controllin
 g the evolution of Earth’s surface\, which allows us to isolate the rela
 tive contributions of mantle flow\, tectonics\, and climate.
LOCATION:Wolfson Lecture Theatre
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