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Geodynamics

Subduction

Advanced geodynamic models of giant earthquakes

and September 16, 2020
Advanced geodynamic models of giant earthquakes
Photograph source: https://pixabay.com

Though giant earthquakes are disastrous, they provide essential information to investigate earthquake physics. In this week’s news and views, Thyagarajulu Gollapalli, a PhD student jointly from the Monash University and the Indian Institute of Technology, Bombay, discusses our present understanding of such big earthquakes and how advanced numerical models will help to get a more precise picture of ...[Read More]

The Sassy Scientist – The Cricetinae Model

September 4, 2020
The Sassy Scientist – The Cricetinae Model

Despite workshops and seminars and conference sessions and Zoom colloquia, of which Geraldine has attended many, one big question remains in geophysics: What drives plate tectonics? Dear Geraldine, Slab pull? Ridge push? Mantle drag? Continental keels? Super plumes? Mantle wind? Expanding Earth? God? Nope, there is only one explanation that truly fits the data and passes the common sense test: The ...[Read More]

Can plume-lithosphere interaction initiate a modern subduction zone?

April 15, 2020
Plume-induced subduction inititation?

This week in News & Views, dr. Marzieh Baes from GFZ Potsdam introduces us to the mechanisms behind subduction initiation. Moreover, she discusses the different types of subduction initiation in reaction to plume-lithosphere interaction that she observed in her recent 3-d numerical modelling study. Possible scenarios of subduction initiation According to plate tectonics, oceanic plates are for ...[Read More]

What controlled the evolution of Plate Tectonics on Earth?

August 14, 2019
Great Unconformity - Immensity River, Grand Canyon
The Great Unconformity–boundary between Lower Paleozoic and Proterozoic rocks indicating the global surface erosion event following Snowball Glaciations that might have kick-started the contemporary phase of active plate tectonics. Photo of the Grand Canyon, Immensity River, Colorado (public domain).

Plate tectonics is a key geological process on Earth, shaping its surface, and making it unique among the planets in the Solar System. Yet, how plate tectonics emerged and which factors controlled its evolution remain controversial. The recently published paper in Nature by Sobolev and Brown suggests new ideas to solve this problem…. What makes plate tectonics possible on contemporary Earth? It is ...[Read More]