Global plate boundary evolution and kinematics since the late Paleozoic

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Matthews, K.J., Maloney, K.T., Zahirovic, S., Williams, S.E., Seton, M., and Müller, R.D. (2016). Global plate boundary evolution and kinematics since the late Paleozoic, Global and Planetary Change, 146, 226-250. DOI: 10.1016/j.gloplacha.2016.10.002

Abstract

Many aspects of deep-time Earth System models, including mantle convection, paleoclimatology, paleobiogeography and the deep Earth carbon cycle, require high-resolution plate models that include the evolution of the mosaic of plate boundaries through time. We present the first continuous late Paleozoic to present-day global plate model with evolving plate boundaries, building on and extending two previously published models for the late Paleozoic (410–250 Ma) and Mesozoic-Cenozoic (230–0 Ma). We ensure continuity during the 250–230 Ma transition period between the two models, update the absolute reference frame of the Mesozoic-Cenozoic model and add a new Paleozoic reconstruction for the Baltica-derived Alexander Terrane, now accreted to western North America. This 410–0 Ma open access model provides a framework for deep-time whole Earth modelling and acts as a base for future extensions and refinement.

This model is available with a default mantle reference frame, a hybrid reference frame using moving hotspots and a true polar wander corrected paleomagnetic reference frame (see paper for details) as well as with a paleomagnetic reference frame. For times before 83 Ma, the Pacific is shifted to maintain relative motions with the circum-Pangea continents – largely due to the fact that no paleomagnetic reference frames exist that extend to the birth age of the Pacific Plate. The paleomagnetic reference frame is based on data from Torsvik, T. H., Van der Voo, R., Preeden, U., Mac Niocaill, C., Steinberger, B., Doubrovine, P. V., van Hinsbergen, D. J., Domeier, M., Gaina, C., and Tohver, E., 2012, Phanerozoic polar wander, palaeogeography and dynamics: Earth-Science Reviews, v. 114, no. 3, p. 325-368, DOI: 10.1016/j.earscirev.2012.06.007.

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Large fluctuations of shallow seas in low-lying Southeast Asia driven by mantle flow

Author List: Sabin Zahirovic, Nicolas Flament, Dietmar Müller, Maria Seton, Mike Gurnis. Citation: Zahirovic, S., Flament, N., Müller, R.D., Seton, M., and Gurnis, M. (2016). Large fluctuations of shallow seas in low-lying Southeast Asia driven by mantle flow. Geochemistry, Geophysics, Geosystems. doi:10.1002/2016GC006434 The Sundaland continental promontory, as the core of Southeast Asia, is one of the lowest lying … Read more…

Deep Carbon Modelling Workshop

Date:  August 29 – 30 2016 Venue: The University of Sydney Description: A two-day workshop bringing together climate and geo-scientists from around Sydney and international collaborators on the DCO-funded Deep Carbon Modelling project. Deep carbon science describes the multi-disciplinary effort to unravel the dynamic interactions of carbon-bearing systems in deep time. The workshop will focus on exploring the interplays … Read more…

Taking the pulse of the global ocean

sediments_currents_global_oceanWhen organic particles sink from the surface ocean to the seafloor, a small but significant proportion of atmospheric carbon is stored away. Adriana Dutkiewicz and colleagues at the University of Sydney and Data61/CSIRO have now used global data sets collected over decades combined with cutting-edge big data analysis to understand how this process depends on surface ocean environments.   … Read more…

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Controls on the distribution of deep-sea sediments

Author List: Dr Adriana Dutkiewicz, Dr Simon O’Callaghan, Prof Dietmar Müller Citation: Dutkiewicz, A., O’Callaghan, S., and Müller, R.D. (2016). Controls on the distribution of deep-sea sediments. Geochemistry, Geophysics, Geosystems 17 1–24. doi:10.1002/2016GC006428 Abstract: Deep-sea sediments represent the largest geological deposit on Earth and provide a record of our planet’s response to conditions at the sea surface from … Read more…

Commotion in the deep Southern Ocean

souther_ocean_circulationCongratulations Adriana Dutkiewicz, Dietmar Müller, Andrew Hogg, and Paul Spence for their recent paper published in Geology. Their paper, Vigorous deep-sea currents cause global anomaly in sediment accumulation in the Southern Ocean, revealed an enormous stretch of the Southern Ocean where sediments are building up at a rate that dwarfs other deep ocean locations. The work has attracted the attention of media internationally. … Read more…

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Vigorous deep-sea currents cause global anomaly in sediment accumulation in the Southern Ocean

Author List:  Adriana Dutkiewicz, Dietmar Müller, Andy Hogg and Paul Spence. Citation: Dutkiewicz, A., Müller, R. D., Hogg, A. M. & Spence, P. (2016). Vigorous deep-sea currents cause global anomaly in sediment accumulation in the Southern Ocean. Geology, 44(8), 663–666. doi:10.1130/G38143.1 Abstract: The vigorous current systems in the Southern Ocean play a key role in regulating the Earth’s … Read more…

Commotion in the deep Southern Ocean

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Bathymetry of the Southeast indian Ridge, where a major sediment accumulation rate anomaly has been linked to lateral changes in the vigour of bottom water flow.

A team led by the University of Sydney School of Geosciences has found an 8,000-km long sediment pile-up in the middle of the Southern Ocean, making this feature unique in the world. Their study was published today in the leading international journal Geology. … Read more…

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Abrupt plate accelerations shape rifted continental margins

Author List: Sascha Brune, Simon Williams, Nathaniel Butterworth and Dietmar Müller. Citation: Brune, S., Williams, S.E, Butterworth, N. P., and Müller, R.D. (2016). Abrupt plate accelerations shape rifted continental margins. Nature, 1–4. doi:10.1038/nature18319 Abstract: Rifted margins are formed by persistent stretching of continental lithosphere until breakup is achieved. It is well known that strain-rate-dependent processes control rift evolution, yet quantified extension … Read more…

The pains and strains of a continental breakup in the media

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View of Australia’s western continental margin, looking eastwards from the Indian Ocean.

Congratulations to Dr Sascha Brune, Dr Simon Williams, Dr Nathan Butterworth, and Prof Dietmar Müller on their paper published in Nature earlier this week. The paper,  Abrupt plate accelerations shape rifted continental margins, has been picked up by the media across the globe.

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The pains and strains of a continental breakup

Every now and then in Earth’s history, a pair of continents draws close enough to form one. There comes a time, however, when they must inevitably part ways. Now scientists at Australia’s EarthByte research group, in collaboration with the German Research Centre for Geosciences, have revealed the underlying mechanics of a continental breakup when this … Read more…

Dietmar Müller finalist for AuScope Excellence in Research Award

Recently the Australian geoscience community celebrated a decade of AuScope achievements. EarthByte’s very own Prof Dietmar Muller was an award finalist for excellence in scientific research and providing tools (such as GPlates) that enable scientific development in our community. GPlates is an open-source and cross-platform tool that is accessible to high school teachers, research scientists and anyone … Read more…

Ridge-spotting: A new test for Pacific absolute plate motion models

Author List: Paul Wessel, Dietmar Müller. Citation: Wessel, P., and Müller, R.D. (2016). Ridge-spotting: A new test for Pacific absolute plate motion models. Geochemistry, Geophysics, Geosystems 17 (6): 2408–2420. doi:10.1002/2016GC006404 Abstract: Relative plate motions provide high-resolution descriptions of motions of plates relative to other plates. Yet geodynamically, motions of plates relative to the mantle are required since … Read more…

Ocean Basin Evolution and Global-Scale Plate Reorganization Events Since Pangea Breakup

Author List: Dietmar Müller, Maria Seton, Sabin Zahirovic, Simon Williams, Kara Matthews, Nicky Wright, Grace Shephard, Kayla Maloney, Nicholas Barnett-Moore, Maral Hosseinpour, Dan Bower and John Cannon. Citation: Müller, R.D., Seton, M., Zahirovic, S., Williams, S.E., Matthews, K.J., Wright, N.M., Shephard, G.E., Maloney, K.T., Barnett-Moore, N., Hosseinpour, M., Bower, D.J., & Cannon, J. (2016). Ocean Basin Evolution and … Read more…

Subduction controls the distribution and fragmentation of Earth’s tectonic plates

Author List: Claire Mallard, Nicolas Coltice, Maria Seton, Dietmar Müller and Paul Tackley Citation: Mallard, C., Coltice, N., Seton, M., Müller, R. D. & Tackley, P. J. (2016). Subduction controls the distribution and fragmentation of Earth’s tectonic plates. Nature, 535, 140-143. doi:10.1038/nature17992 Abstract: Volcanic hotspot tracks featuring linear progressions in the age of volcanism are typical surface expressions of plate … Read more…

Solving Earth’s giant jigsaw puzzle of tectonic plates

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Earth’s plate tesselation through time (150 Myr ago to present)

Plate tectonics drives earthquakes and volcanism, forms precious mineral deposits and controls the planet’s long-term carbon cycle.   But why do we have just a few large plates, and many tiny plates?  Does it matter? These questions have now been answered in a French-Swiss-Australian collaborative paper led by PhD student Claire Mallard at the Univ. Lyon, published on 15 June 2016 in the journal Nature. The paper includes Nicolas Coltice (Lyon), EarthByters Dietmar Müller and Maria Seton, and Paul Tackley (ETH). 

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A rapid burst in hotspot motion through the interaction of tectonics and deep mantle flow

Author List: Rakib Hassan, Dietmar Müller, Mike Gurnis, Simon Williams and Nicolas Flament Citation: Hassan, R., Müller, R.D., Gurnis, M., Williams, S.E. and Flament, N. (2016). A rapid burst in hotspot motion through the interaction of tectonics and deep mantle flow. Nature, 533, 239-242. doi:10.1038/nature17422 Abstract: Volcanic hotspot tracks featuring linear progressions in the age of volcanism … Read more…

Tectonic evolution of Western Tethys from Jurassic to present day: coupling geological and geophysical data with seismic tomography models

Author List: Maral Hosseinpour, Simon Williams, Maria Seton, Nicholas Barnett-Moore and Dietmar Müller Citation: Hosseinpour, M., Williams, S., Seton, M., Barnett-Moore, N., and Müller, R.D. (2016). Tectonic evolution of Western Tethys from Jurassic to present day: coupling geological and geophysical data with seismic tomography models. International Geology Review 58 (13): 1616–1645. doi:10.1080/00206814.2016.1183146 Abstract: The geodynamic evolution of the … Read more…

How the Hawaiian-Emperor seamount chain got its spectacular bend

In a paper published in Nature, Rakib Hassan with fellow EarthByters Dietmar Müller, Simon E. Williams & Nicolas Flament, and Caltech’s Michael Gurnis, proposed a solution to a long standing geological mystery – how the distinct bend in the Hawaiian-Emperor Seamount Chain came to be. Using NCI’s Raijin supercomputer, the research team simulated flow patterns in the Earth’s mantle over the past 100 million years. The convection model suggests that the history of subduction has a profound effect on the time-dependent deformation of the edges of the Large Low-Shear Velocity Province (LLSVP) under the Pacific. The Hawaiian plume originates from the edge of this province and the southward migration of the plume during the formation of the Emperor chain reflects the migration of the northern edge of the LLSVP before ~47 million years ago. 
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Geologists Discover How Australia’s Highest Mountain Formed

Eastern_australia_topographyCongratulations to Prof Dietmar Müller, Dr Nicolas Flament, Dr Kara Matthews, Dr Simon Williams, and Prof Michael Gurnis on their paper recently published in Earth and Planetary Science Letters. Their paper, Formation of Australian continental margin highlands driven by plate-mantle interaction, has featured in a variety of Australian and international media outlets.

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Geologists Discover How Australia’s Highest Mountain Formed – Media Release

Eastern_australia_topographyGeologists from the University of Sydney and the California Institute of Technology have solved the mystery of how Australia’s highest mountain – Mount Kosciusko – and surrounding alps came to exist.

Most of the world’s mountain belts are the result of two continents colliding (including the Himalayas) or volcanism. The mountains of Australia’s Eastern highlands – stretching from north-eastern Queensland to western Victoria – are an exception. Until now no one knew how they formed.

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PLOS ONE – The GPlates Portal: Cloud-Based Interactive 3D Visualization of Global Geophysical and Geological Data in a Web Browser

Author List: Dietmar Müller, Xiaodong Qin, David Sandwell, Adriana Dutkiewicz, Simon Williams, Nicolas Flament, Stefan Maus, Maria Seton Citation: Müller, R. D., Qin, X., Sandwell, D. T., Dutkiewicz, A., Williams, S. E., Flament, N., Maus, S., & Seton, M. (2016). The GPlates Portal: Cloud-Based Interactive 3D Visualization of Global Geophysical and Geological Data in a Web Browser. … Read more…

Earth and Planetary Science Letters – Formation of Australian continental margin highlands driven by plate–mantle interaction

Author List: Dietmar Müller, Nicolas Flament, Kara Matthews, Simon Williams and Mike Gurnis Citation: Müller, R. D., Flament, N., Matthews, K. J., Williams, S. E., & Gurnis, M. (2016). Formation of Australian continental margin highlands driven by plate–mantle interaction. Earth and Planetary Science Letters, 441, 60–70. http://dx.doi.org/10.1016/j.epsl.2016.02.025 Formation of Australian continental margin highlands driven by plate–mantle … Read more…

Geophysical Research Letters – Alignment between seafloor spreading directions and absolute plate motions through time

Author List: Simon Williams, Nicolas Flament and Dietmar Müller Citation: Williams, S., Flament, N., & Müller, R. D. (2016). Alignment between seafloor spreading directions and absolute plate motions through time. Geophysical Research Letters, 43, 1472–1480, doi:10.1002/2015GL067155. Alignment between seafloor spreading directions and absolute plate motions through time

Earth-Science Reviews – The Late Cretaceous to recent tectonic history of the Pacific Ocean basin

Wright, N. M., Seton, M., Williams, S. E., & Müller, R. D. (2016). The Late Cretaceous to recent tectonic history of the Pacific Ocean basin. Earth-Science Reviews, 154, 138–173. http://dx.doi.org/10.1016/j.earscirev.2015.11.015 The Late Cretaceous to recent tectonic history of the Pacific Ocean basin 

Earth and Planetary Science Letters – Assessing the role of slab rheology in coupled plate-mantle convection models

Bello, L., Coltice, N., Tackley, P. J., Müller, R. D., & Cannon, J. (2015). Assessing the role of slab rheology in coupled plate-mantle convection models. Earth and Planetary Science Letters, 430, 191–201. http://dx.doi.org/10.1016/j.epsl.2015.08.010 Assessing the role of slab rheology in coupled plate-mantle convection models

Tectonophysics – Full-fit reconstruction of the South China Sea conjugate margins

Bai, Y., Wu, S., Liu, Z., Müller, R. D., Williams, S. E., Zahirovic, S., & Dong, D. (2015). Full-fit reconstruction of the South China Sea conjugate margins. Tectonophysics, 661, 121–135. http://dx.doi.org/10.1016/j.tecto.2015.08.028 Full-fit reconstruction of the South China Sea conjugate margins

GPlates Portal International Media Coverage

gravity_grid_180my_agoThe recent article on the GPlates Portal published in PLOS ONE by Prof Dietmar Müller, Xiaodong Qin, Prof David Sandwell, Dr Adriana Dutkiewicz, Dr Simon Williams, Dr Nicolas Flament, Dr Stefan Maus, and Dr Maria Seton, has received significant international media attention over the past week, featuring in articles from Australia, UK, US, India, and UAE!

See the list of online media below, and check out the interactive globes yourself!

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Virtual Time Machine Of Earth’s Geology Now In The Cloud

gravity_grid_180my_agoHow did Madagascar once slot next to India? Where was Australia a billion years ago?

Cloud-based virtual globes developed by a team led by University of Sydney geologists mean anyone with a smartphone, laptop or computer can now visualise, with unprecedented speed and ease of use, how the Earth evolved geologically. 

Reported today in PLOS ONE, the globes have been gradually made available since September 2014. Some show Earth as it is today while others allow reconstructions through ‘geological time’, harking back to the planet’s origins.  

Uniquely, the portal allows an interactive exploration of supercontinents. It shows the breakup and dispersal of Pangea over the last 200 million years. It also offers a visualisation of the supercontinent Rodinia, which existed 1.1 billion years ago. Rodinia gradually fragmented, with some continents colliding again more than 500 million years later to form Gondwanaland.   

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2016 supercomputing resources

Basin GENESIS Hub logo

The EarthByte group has been awarded 11 million computing hours, representing the equivalent of k$AU440, to carry out research for the Basin GENESIS Hub on the supercomputers Raijin (National Computational Infrastructure) and Magnus (Pawsey Supercomputing Centre) for 2016 through the National Computational Merit Allocation Scheme (7.25 MSUs, one of the top 4 allocations across all disciplines … Read more…