Computers and Geosciences – Plate Reconstructions with Continuously Closing Plates

Gurnis, M., Turner, M., Zahirovic, S., DiCaprio, L., Spasojevic, S., Müller, R. D., … & Bower, D. J. (2012). Plate tectonic reconstructions with continuously closing plates. Computers & Geosciences, 38(1), 35-42. doi:10.1016/j.cageo.2011.04.014. We present a new algorithm for modeling a self-consistent set of global plate polygons. Each plate polygon is composed of a finite list … Read more…

Physics of the Earth and Planetary Interiors – Signatures of downgoing plate-buoyancy driven subduction in Cenozoic plate motions

Goes, S., Capitanio, F. A., Morra, G., Seton, M., & Giardini, D. (2011). Signatures of downgoing plate-buoyancy driven subduction in Cenozoic plate motions. Physics of the Earth and Planetary Interiors, 184(1), 1-13. doi:10.1016/j.pepi.2010.10.007. Link to download the paper from Science Direct

EarthByte to attend AGU 2011

EarthByte group members Dietmar Müller, Adriana Dutkiewicz, Nicolas Flament, Leonardo Quevedo, Maria Seton, Simon Williams, Nathaniel Butterworth, Kayla Maloney and Kara Matthews are attending the AGU Fall Meeting 2011 in San Francisco, USA from 5-9 December, 2011. Click here for more details about the AGU Fall Meeting

IODP workshop on Indian Ocean Drilling scheduled for late 2011

An Integrated Ocean Drilling (IODP) workshop on Indian Ocean Drilling to be held in late 2011 in Goa, India has just been approved, funded by $33,000 from IODP, and supported by the Australian IODP Office, which plans to send 15 Australians and Kiwis to the meeting, including EarthByte’s Dietmar Müller, and Stephen Gallagher (UMelb), Neville Exon (ANU), Richard Arculus (ANU), Mike Coffin (Tasmania) and Richard Wysoczanski (NZ, NIWA). The workshop is timed to suit an April 2012 drilling proposal submission deadline. … Read more…

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The subduction reference framework: Unravelling the causes of long-term sea-level change

Project Summary
Sea level has fluctuated by up to 300 m through geological time, creating vast sedimentary basins and associated natural resources. We will use Earth’s subduction history as imaged by seismic tomography to establish a subduction reference framework for the past 200 million years, tracking all tectonic plates in both latitude and longitude. 4D numerical mantle-plate tectonic simulations (3D plus time) will reconstruct how the recycling of old, cold oceanic plates into the mantle have influenced surface topography and sea-level change since the breakup of the supercontinent Pangaea.  … Read more…

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Age and Bathymetry of the World’s Ocean Crust for the last 140 million years

Muller etal Figure1Reconstructing vanished oceans
We establish the locations and geometry of mid ocean ridges through time on the basis of marine magnetic anomaly identifications, geological information such as paleomagnetic data from terranes and microcontinents, especially in the Tethys Ocean, mid-oceanic ridge subduction events and the rules of plate tectonics. Based on a global set of tectonic plate rotations we construct a set of refined seafloor isochrons following the interpolation technique outlined by Müller et al. (1997; 2008) but including a multitude of additional data. … Read more…

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Global subduction and back-arc basin grids and data

Please Note: These age grids are now outdated. Please see the agegrids available from the Müller et al. 2013 study on Ocean Chemistry at the Seawater chemistry driven by supercontinent assembly, break-up and dispersal resource page.

Subduction image 1Downloads
Download global subduction age grid images via FTP here – tgz file
Download global subduction parameter dataset via FTP here – tgz file
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Integrating global multidimensional datasets to underpin subduction process modelling during the past 60 million years

Project Report
Understanding the initiation and processes governing subduction remains one of the greatest challenges in geodynamics. Subduction processes affect every aspect of the Earth system, from its control on the thermal and chemical state of the mantle, to its recycling of oceanic lithosphere, sediments, water and volatiles, to its affect on the atmosphere, hydrosphere, biosphere and solid Earth through earthquakes and volcanic eruptions. Moreover, subduction is generally agreed to be one of the primary driving forces of plate tectonics and mantle convection through slab pull and the addition of raw materials into the mantle. … Read more…

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Seafloor imaging east and south of Australia

Project Summary
Data from three recent cruises on N.O. L’Atalante are used in collaboration with AGSO to use backscatter and bathymetry data for seafloor classification, and to reconstruct the tectonic and sedimentary history of selected areas, also based on 3.5 kHz, seismic reflection, gravity and magnetic data.

Sponsors
Australian Geological Survey Organization
Environment Australia  … Read more…

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