Prof Dietmar Müller

Dietmar MüllerGroup Coordinator

dietmar.muller@sydney.edu.au

Phone: +61 2 9351 4255
Fax: +61 2 9351 3644

Madsen Building F09, Room 406
School of Geosciences
The University of Sydney
Sydney, NSW 2006
Australia

View Dietmar's Sydney Uni page

See below for EarthByte content related to Dietmar.

Testing hotspot fixity in the Indian and Atlantic oceans

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Project Summary
We have developed a novel interactive evolutionary inversion approach for computing absolute tectonic plate motions and their uncertainties based on hotspot tracks through time. We use a modified criterion of fit for inverting hotspot-track data, following an approach previously developed by Chang and co-workers for relative plate motions. Using this method, we derive covariance matrices for absolute plate rotations for the last 120 million years for the first time, using dated hotspot tracks in the Atlantic-Indian oceans. This represents a major advance in quantitatively constraining paleogeographic maps for the last 130 million years.  … Read more…

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EarthByte to attend AGU 2011

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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

Geomagnetism

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Project Summary Derivation of Earth’s magnetic field as measured at satellite altitude and implications for Earth evolution, resource exploration, and environmental studies. Funding Agency World University Network for Geomagnetism Project Participants Prof David Gubbins Prof Dietmar Müller Dr David Ivers Prof Denis Winch Related Projects Virtual Geological Observatory Gondwanaland Evolution

Earth’s magnetic field

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Project Summary
The magnetic field measured by satellites has 3 distinct sources: the dynamo in the liquid core, magnetised rocks near the Earth’s surface, and the external, solar terrestrial environment. It is difficult to separate out the large-scale field (originates in the earth’s core) from the small-scale, permanent field (originates in the earth’s crust). This project aims to develop physical theories for the origin of each field to aid separation, accompanied by comparison with satellite data and iterative improvements. It is envisaged that this project will extend our knowledge of the core field to unprecedented fine resolution while establishing the larger scales of the crustal field.  … Read more…

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Earth's magnetic field

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Project Summary
The magnetic field measured by satellites has 3 distinct sources: the dynamo in the liquid core, magnetised rocks near the Earth’s surface, and the external, solar terrestrial environment. It is difficult to separate out the large-scale field (originates in the earth’s core) from the small-scale, permanent field (originates in the earth’s crust). This project aims to develop physical theories for the origin of each field to aid separation, accompanied by comparison with satellite data and iterative improvements. It is envisaged that this project will extend our knowledge of the core field to unprecedented fine resolution while establishing the larger scales of the crustal field.  … Read more…

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The global fracture zone and magnetic lineation data base project

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Project Summary
Plate kinematic models derive from the detailed identifications of conjugate magnetic isochron picks and fracture zones (FZ). These data form the foundation of all relative marine plate tectonic reconstructions and codify our understanding of Earth’s surface evolution since the Mesozoic. Furthermore, FZ traces have extensive uses in many other marine geophysical investigations such as studying the origins of transform fault offsets, identifying seamounts and isolating abyssal hill roughness within fracture zone provinces, examining predictions from competing thermal models of the lithosphere, and much more. Kinematic models also require temporal information and this dimension is provided by identification of key magnetic isochron boundaries from total field magnetic anomalies collected along ship tracks. … Read more…

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Planet scale reorganisations of the plate-mantle system

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Project Summary
Global climate change and shrinking resources have heightened our sense of dependence on the earth as a dynamic and complex system. This project aims to provide a unifying context for enhancing our understanding and appreciation of the workings of the inner earth and, in particular, its complex system behaviour during major tectonic events. … Read more…

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Nature Geoscience – Origin of Indian Ocean Seamount Province by shallow recycling of continental lithosphere

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Hoernle, K., Hauff, F., Werner, R., van den Bogaard, P., Gibbons, A. D., Conrad, S., & Müller, R. D. (2011). Origin of Indian Ocean Seamount Province by shallow recycling of continental lithosphere. Nature Geoscience, 4(12), 883-887. doi:10.1038/ngeo1331. Download the paper – link

Indian Ocean cocktail party leaves trail of party hats behind

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Ana Gibbons, Dietmar Müller and colleagues from IfM-GEOMAR Leibniz Institute of Marine Sciences, Germany research into Indian Ocean Cocktail Party leaves trail of party hats behind has been highlighted on the USyd News page. See the USyd News article ‘Indian Ocean Cocktail Party leaves trail of party hats behind’ here

DICTA – A spatio-temporal knowledge-discovery platform for Earth-Science data

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Landgrebe, T. C. W., & Muller, R. D. (2011, December). A Spatio-Temporal Knowledge-Discovery Platform for Earth-Science Data, Digital Image Computing Techniques and Applications (DICTA). In 2011 International Conference on (pp. 6-8). doi:10.1109/DICTA.2011.73. Download the paper – pdf

EarthByte to attend GSA Fragile Earth conference 2011

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EarthByte group members Dietmar Müller, Christian Heine, Nicolas Flament, Aedon Talsma, Logan Yeo and Grace Shephard are attending the GSA Fragile Earth conference in Munich, Germany from 4-7 September, 2011. Click here for details about the GSA conference

‘Towards a unified East Gondwanaland reconstruction and its implications for Himalayan Orogeny’ wins funding

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EarthByte’s Dietmar Müller, Joanne Whittaker and Ana Gibbons along with Gordon Lister and Lloyd White of the Research School of Earth Sciences at ANU, Canberra, have won funding for their project “Towards a unified East Gondwanaland reconstruction and its implications for Himalayan Orogeny” from the Australia-India Strategic Research Fund (AISRF). This project will involve a close collaboration with Yatheesh Vadakkeyakath, K.A. Kamesh Raju, G.C. Bhattacharya and S. Kiranmai of the National Institute of Oceanography in Goa, India. The project follows on from a successful French-Australian collaboration that unraveled a new high-resolution plate model of the Australia-Antarctica-India plate boundaries, while similar information was obtained for the India-Antarctica-Africa plate boundaries under two recently concluded Indo-French collaborations. … Read more…

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'Towards a unified East Gondwanaland reconstruction and its implications for Himalayan Orogeny' wins funding

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EarthByte’s Dietmar Müller, Joanne Whittaker and Ana Gibbons along with Gordon Lister and Lloyd White of the Research School of Earth Sciences at ANU, Canberra, have won funding for their project “Towards a unified East Gondwanaland reconstruction and its implications for Himalayan Orogeny” from the Australia-India Strategic Research Fund (AISRF). This project will involve a close collaboration with Yatheesh Vadakkeyakath, K.A. Kamesh Raju, G.C. Bhattacharya and S. Kiranmai of the National Institute of Oceanography in Goa, India. The project follows on from a successful French-Australian collaboration that unraveled a new high-resolution plate model of the Australia-Antarctica-India plate boundaries, while similar information was obtained for the India-Antarctica-Africa plate boundaries under two recently concluded Indo-French collaborations. … Read more…

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Cambridge University Press – Next-generation plate-tectonic reconstructions using GPlates

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Boyden, J., Müller, R. D., Gurnis, M., Torsvik, T. H., Clark, J. A., Turner, M., … & Cannon, J. S. (2011). Next-generation plate-tectonic reconstructions using GPlates. Geoinformatics: Cyberinfrastructure for the Solid Earth Sciences. Keller, G. R., & Baru, C. (Eds.). (2011). Geoinformatics: cyberinfrastructure for the solid Earth sciences. Cambridge University Press. Download the paper – pdf

IODP workshop on Indian Ocean Drilling scheduled for late 2011

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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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EarthByte attends 2010 Theo Murphy High Flyers Think Tank

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This month saw the release of the proceedings of the 2010 Theo Murphy High Flyers Think Tank, which was held at the Australian Academy of Sciences in August 2010 and brought together the nation’s top geoscience researchers, including EarthByte’s Prof. Dietmar Müller and Dr Thomas Landgrebe, to address challenges in mineral exploration. Dietmar and Thomas … Read more…

Full-fit, palinspastic reconstruction of the conjugate Australian-Antarctic margins

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AusAntCThick47Ma-1Despite decades of study the pre-rift configuration and early rifting history between Australia and Antarctica is not well established. The plate boundary system during the Cretaceous includes the evolving Kerguelen-Broken Ridge Large Igneous Province in the west as well as the conjugate passive and transform margin segments of the Australian and Antarctic continents. … Read more…

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Dynamic subsidence of eastern Australia during the Cretaceous

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Dynamic Subsidence of Eastern Australia Matthews et al (2011)During the Early Cretaceous Australia’s eastward passage over sinking subducted slabs induced widespread dynamic subsidence and formation of a large eperiogenic sea in the eastern interior. Despite evidence for convergence between Australia and the paleo-Pacific, the subduction zone location has been poorly constrained. Using coupled plate tectonic-mantle convection models, we test two end-member scenarios, one with subduction directly east of Australia’s reconstructed continental margin, and a second with subduction translated ~1000 km east, implying the existence of a back-arc basin. Our models incorporate a rheological model for the mantle and lithosphere, plate motions since 140 Ma and evolving plate boundaries. While mantle rheology affects the magnitude of surface vertical motions, timing of uplift and subsidence depends on plate boundary geometries and kinematics. … Read more…

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High resolution reconstruction of the Central and Eastern Indian Ocean

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Project Summary
Plate reconstruction models for the rifting and separation of Gondwanaland’s conjugate margins continue to be poorly constrained. We propose to develop a new, high-resolution plate model for the central and eastern Indian ocean by synthesizing old and new geological and geophysical data utilizing combined French and Australian advanced software for magnetic anomaly modeling and plate tectonic reconstructions. We will test alternative continental fit reconstruction hypotheses by using a variety of reconstructed data sets. Such a joint research is timely, as the Indian Ocean continental margins become the focus of intense oil and gas exploration.  … Read more…

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

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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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Integration of plate kinematic reconstructions in geodynamic models of mantle convection

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Project Summary
Despite more than 30 years of plate tectonics research, we still do not know exactly what drives the plates or controls the time-dependence of mantle convection. Plate motions are linked to processes in the deeper Earth interior by complex, enigmatic cause-and-effect relationships. While mantle convection is generally accepted as the underlying cause of plate motions, the geometry of mantle flow and its relation to plate motions remains poorly understood. As plate tectonics is the Earth Science paradigm, breakthroughs in this field affect understanding of all branches of Earth Science including formation and distribution of natural resources, long-term climate change and natural hazards. … Read more…

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