The Eurasian and North American tectonic plates - Thingvellir National Park - Iceland

Environmental Geodesy

Research in geodynamics and environmental geodesy encompasses all aspects of deformation of the solid Earth and its fluid envelope.

science Research area

About

Research in geodynamics and environmental geodesy encompasses all aspects of deformation of the solid Earth and its fluid envelope, including the development of models of the past ice history of the Earth, the effects of climate change on polar ice sheets, sea level variations, elastic tidal deformation of the Earth and more conventional studies of tectonic deformation through earthquakes, Interferometric Synthetic Aperture Radar, GPS etc.

Space-geodetic techniques such as the recent Gravity Recovery and Climate Experiment (GRACE) mission and JASON-1/2 and Cryosat-2 satellite altimetry mission provide new observations of the changing nature of our planet. We can use these tools to investigate how climate change is affecting the environment, notably changes in sea level, rates of melting of polar ice caps and even ground water storage.

The Structure Tectonics Team at ANU engages in research related to the discipline of Structural Geology and Tectonics. Some of us engage in research that attempts to link what we see in the field (with projects in the Alps, the Aegean, the Himalaya and in Indonesia), with what we see in thin section, dating timing of processes such as shear zone movement or episodes of mineral growth or recrystallization using 40Ar/39Ar geochronology in order to link to large-scale processes. Others of us build models of regions using geophysical datasets (e.g., 4D SE Asia), seismotectonics (e.g., using eQuakes) so we can link what is happening now into deeper time, and 4D tectonic reconstruction (using Pplates) in order to develop kinematic models that help us unravel the complexity of the geological process and how these processes link to the interaction of the subducting slabs.

The Rock Physics group investigates macroscopic physical properties such as strength, permeability or seismic wave speeds and attenuation.  These are interpreted through microstructural studies centred around light and electron microscopy. The Group's research centres on investigation of the physical behaviour of geological materials under controlled laboratory conditions and application of the resulting insights to the structure and processes of the Earth. Measurements of macroscopic physical properties such as strength, permeability or seismic wave speeds and attenuation, are interpreted through microstructural studies centred around light and electron microscopy. Often it is necessary to prepare, from either natural or synthetic precursors, simpler synthetic materials whose properties are amenable to more detailed interpretation than those of complex natural rocks. Our interest in Earth materials is shared by members of the School's Petrochemistry and Experimental Petrology Group, who focus primarily upon the chemical aspects of their behaviour.

More information

tectonics.anu.edu.au

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Explore the AuScope Gravity Program, advancing geodesy through high-precision gravity measurements and global collaboration.

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Explore our methods for computing deformations caused by great earthquakes.

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Explore the distinguished past members of the Environmental Geodesy research group.

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Explore our research on Earth's dynamics using geodesy, modeling, and observation analysis.

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Projects

Understanding present-day melting patterns of polar ice caps and the contribution to present-day sea level variations requires first unravelling the puzzle of how the continents are still adjusting after the melting that has occurred since the Last Glacial Maximum around 10,000 years ago. This is a complicated...

Understanding present-day melting patterns of polar ice caps and the contribution to present-day sea level variations requires first unravelling the puzzle of how the continents are still adjusting after the melting that has occurred since the Last Glacial Maximum around 10,000 years ago. This is a complicated...

With the onset of warmer global temperatures, an increase in precipitation is predicted for low-latitude regions of northern Australia, while the southern parts are predicted to become drier. Water is a critical resource, yet little is currently known about the actual amount of groundwater available, let alone how...

Tide gauges are used to measure the rate of change of the ocean surface relative to the land (relative sea level). The vertical movement of the tide gauge itself needs to be considered before such observations can be used to estimate variations in regional or global sea level. Space-geodetic techniques such as the...

Status

Current

The ability to detect monthly mass changes through space-geodetic missions provides the capability to assess changes in the ice sheets of Antarctica and Greenland. Decreases in mass imply that the cryosphere is melting and increasing the volume of the oceans whereas increases in mass imply increased precipitation...

Microstructural analysis with micro-scale based 40 Ar/ 39 Ar geochronology has been used to differentiate between different deformational events in the extensional zone of the central Agean Sea, Greece. North/south directed extension in the central Aegean has been largely accommodated by the...

Status

Current

Members

Leader

Professor
Head of Climate and Ocean Geoscience

Researcher

Dr Sia Ghelichkhan

Lecturer (Tenure-Track) at Research School of Earth Sciences
Institute for Water Futures

Postdoctoral Fellow

Research Officer
Other

Research Fellow

Research support officer

Technical Officer

Student

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PhD Candidate

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Honour Student

PhD Candidate

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PhD Candidate

Member

Research Officer

Visitor and affiliate

Visitor/Research Fellow

Emeritus Professor

News

Seminar presented by: Dr Rebecca McGirr, ACEAS Research Associate, Australian National University.

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When Dr Mahdiyeh Razeghi started her undergraduate degree in Iran, little did she know that she would go on to pioneer a niche area of groundwater evolution study in Australia.

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