Martian volcanic systems: using surface strain indicators to investigate magmatically driven stress in the Tharis region, Mars
Dr Emma Bramham (SEE), Dr Mark Thomas (SEE), Dr Paul Byrne (NCSU), Prof Sandra Piazolo (SEE), Prof Douglas Paton (SEE)Project partner(s): Dr Paul Byrne (NCSU)Contact email: E.K.Bramham@leeds.ac.uk
This exciting project aims to decipher the geological history of Mars utilising the ample spacecraft data collected over the last decade. The novelty of the project lies in using the surface expressions of volcanic systems of Mars to infer the planet’s inner workings through time. Scientific outcomes and technique development undertaken as part of the project will be not only important for our understanding of Mars, but also transferable to other planetary bodies – including Earth.
Remote sensing of planets and moons across our solar system has provided us with a view of the topography and surface processes of these distant locations. For Mars, the available data is often both of a higher resolution and a far greater spatial extent than those we have for Earth, presenting unprecedented geological insight into the Red Planet. However, although these data allows for measurement and analysis of volcanic and tectonic structures on Mars, our understanding of the sub-surface processes and driving mechanisms for these structures is limited. We therefore look to analogous structures on Earth, of which we have a greater understanding, but we must also consider differences between both planets, such as lithospheric strength and thickness and variations in surface gravity (Kronberg et al. 2007, Musiol et al., 2016, Heap et al., 2017) that guide the driving mechanisms behind these systems.
This study will focus on the ancient volcanic systems in the Tharsis region of Mars and the extensive systems of radial and circumferential grabens there (e.g. Ohman and Mc Govern, 2014). The aim of the study will be to map and quantify surface fault displacement across the region using high resolution remote-sensing data of the Martian surface: MOLA (Mars Orbiter Laser Altimeter), CTX (Mars Reconnaisance Orbiter Context Camera) and HiRISE (High Resolution Imaging Science Experiment) datasets. The associated strain will then be incorporated with appropriate ranges of surface gravity and lithospheric strength to produce potential models of historical volcanic behaviour. The utility of this process will be tested using equivalent Earth-based analogous data over volcanic zones in Iceland.
You will work within the Planetary Exploration Group (PEG) here at Leeds and with Dr Paul Byrne at NCSU. In particular, according to your particular research interests, the studentship could involve:
1. Analysis of fault systems on Mars, specifically around Alba Mons and other regions of the Tharsis Rise, using MOLA, CTX and HiRISE data to extract, map and compare fault displacement profiles at the different resolutions across the region.
2. Production of associated surface strain maps and use of available Elastic Dislocation (ED) modelling software to produce models of ED and predicted fault plane failure.
3. Development of volcanic modelling processes to include surface fracture prediction via back analysis of measured surface fractures in the Tharsis region.
4. Using a combination of strain measurements from available high-resolution LiDAR data and field work in Iceland to investigate and develop analogous volcanic system models on Earth and to further develop planetary volcanic system modelling processes in general.
5. Utilising Martian meteorite samples to constrain surface material properties and behaviour, including the use of high-end microscopy at UoL as well as possible analysis at synchrotron facilities.
• Cailleau, B., Walter, T.R., Janle, P., Hauber, E. (2005), Unveiling the original of radial grabens on Alba Patera volcano by finite element modelling, Icarus, v. 176, p 44-56
• Heap, M.J., Byrne, P.K., Mikhail, S. (2017), Low surface gravitational acceleration of Mars results in a thick and weak lithosphere: Implications for topography, volcanism, and hydrology. Icarus, 281, p 103-114
• Kronberg, P., Hauber, E., Grott, M., Werner, S.C., Schafer, T., Gwinner, K., Giese, B., Masson, P., Neukum, G. (2007), Acheron Fossae, Mars: Tectonic rifting, volcanism, and implications for lithospheric thickness, Journal of Geophysical Research, v. 112
• Ohman, T., McGovern, P.J. (2014), Circumferential graben and the structural evolution of Alba Mons, Mars. Icarus, v. 233, p 114-125
• O’Neil, J. (2017), Investigating deformation and the effect of planetary gravity in grabens north of the Alba Mons volcano, Tharsis Region, Mars. MSc Thesis, University of Leeds
• Musiol, S., Holohan, E.P., Cailleau, B., Platz, T., Dumke, A., Walter, T.R., Williams, D.A., van Gasselt, S. (2016), Lithospheric flexure and gravity spreading of Olympus Mons volcano, Mars. Journal of Geophysical Research: Planets, v. 121, p 255-272
Related undergraduate subjects:
- Applied mathematics
- Computer science
- Earth science
- Earth system science
- Geological science
- Geophysical science
- Physical science
- Remote sensing