The Tectonics and Geophysics Research Group researches the breadth of tectonics and magmatism from rapid events such as earthquakes and volcanic eruptions, to slower processes such as solid-state creep and magma flow, and longer time scale processes that shape Earth's crust by deep crustal and mantle deformation.
We use field research, laboratory analysis and numerical modelling to understand dynamic processes occurring in Earth's interior from near-surface to deepest mantle. This work feeds into research priorities in geohazards, deformation of Earth materials and computational Earth sciences.
Aims
We aim to understand the causes and consequences of the dynamic processes changing the solid Earth by using our expertise in structural geology, petrology, geophysics, tectonics and geodynamics.
Research
Tom Blenkinsop, David Buchs, Ake Fagereng, Huw Davies and Chris MacLeod lead this area, investigating the physical processes of the solid Earth using field observations, laboratory analyses, geophysical observations and numerical modelling.
Our research ranges from crustal fault behaviour and fluid flow to the deformation of the mantle, from microscopic to global scales.
Our three focus areas are:
- volcanic, sedimentary and tectonic processes at convergent and divergent margins
- fault mechanics and microstructures
- early Earth tectonics
We examine how faults accommodate slip, seismically and aseismically, and how the range in geophysically observed fault behaviours may be recorded in exhumed rocks, using examples from contractional, extension and strike-slip tectonic regimes.
Magmatism and tectonics
Our research focuses on the formation and evolution of the lithosphere in a variety of oceanic and continental settings. These are split into four areas:
- mid-ocean ridges (Macleod, Lissenberg and Millet)
- subduction zones (Buchs, Fagereng, Kerr, Lissenberg, MacLeod, and Millet)
- intraplate regions (Kerr, Buchs, and Millet)
- ocean islands (Ramalho and Millet)
We adopt a multidisciplinary approach, mostly based on fieldwork on land and at sea (including ocean drilling), using a combination of geochemical/petrological modelling, structural geology and geophysics.
Processes of particular interest to us include:
- magma generation in the sub-oceanic mantle
- crustal accretion at mid-ocean ridges
- deformation of the oceanic lithosphere
- formation of seamounts and oceanic islands
- formation of oceanic plateaus and continental flood basalts and their environmental impacts
- hydrothermal processes
- subduction initiation and the formation of ophiolites.
Mantle geodynamics
Led by Huw Davies, we are interested in understanding how mantle dynamics drive plate tectonics and control planetary evolution using global and regional numerical simulations constrained by observations. Processes of interest include subduction, upwelling plumes and mantle convection. Much of our numerical simulations are undertaken on large clusters including, the University cluster run by Advanced Research Computing at Cardiff (ARCCA), and the UK Supercomputer, Archer2.
Recent grants
- Blenkinsop, T. G. (Lead PI of Cardiff element) Ballistic damage of stone heritage structures in conflict areas, to Dr. Lisa Mol, 2017-2022, £199,745, £81,304 to Cardiff.
- Davies, H. (Lead PI of Cardiff element) Volatile legacy of the Early Earth. NERC Grant – NE/M000400/1. September 2014-March 2021, £123,512
- Davies, H. (Lead PI of Cardiff element) Mantle volatiles : processes, reservoirs and fluxes. NERC Grant - NE/M000397/1. September 2014-March 2021, £221,000
- Davies JH (Lead PI) Mantle Circulation Constrained (MC2): A multidisciplinary 4D Earth framework for understanding mantle upwellings, co-I - MB Andersen, O Shorttle, GG Roberts, A Biggin, J Wookey, T Elliott, A Nowacki, A Walker, C Davies, A Ferreira, P Koelemeijer, NERC Large Grant - NE/T012633/1, November 2020-October-2024, £3,684,000 FEC, £2,963,000 from funder; £804,471 to Cardiff.
- Davies, JH, The Evolution of Terrestrial Planets: Insights from Models of Planetary Evolution with Coupled Internal, Atmospheric/Surface Development, Horizon 2020, Marie Skłodowska-Curie Fellowship to Dr. Matt Weller, 2021-2023, €212,933.76
- Fagereng, A. MICA: Mechanics of slow earthquake phenomena: an Integrated perspective from the Composition, geometry, And rheology of plate boundary faults. ERC Starting Grant 715836. Feb 2017 – Feb 2023, €1,499,244
- Fagereng, A. (Lead of Cardiff element) PREPARE: Enhancing PREParedness for East African Countries through Seismic Resilience Engineering. EPSRC Global Challenges Research Fund EP/P028233/1, May 2017 – Mar 2022. £1,381,845 from funder, £214,818 to Cardiff.
- Lissenberg, C.J., Millet, M.-A. HiDe: A highly heterogeneous depleted mantle? NERC Standard Grant NE/T000317/1. Jan 2020-Jan 2023, £514,889.
- Lissenberg, C.J. Decoding the crystal record of volcanic eruptions, Royal Commission for the Exhibition of 1851 Research Fellowship to Dr. Matthew Gleeson, 2020-2023, £193,578.
- MacLeod, C.J. ULTRA - Ultramafic-hosted mineral Resource Assessment NERC Highlight Topic Grant NE/S004300/1. 2020-2024, £412,842.
- Millet M-A NIIICE: Novel Isotope Insights Into Continent Evolution NERC Standard Grant NE/R001332/1 – £506,772 April 2018 – June 2022
Cwrdd â'r tîm
Publications
- Knight, B. S. , Davies, J. H. and Capitanio, F. A. 2021. Timescales of successful and failed subduction: insights from numerical modelling. Geophysical Journal International 225 (1), pp.261-276. (10.1093/gji/ggaa410)
- Fagereng, Å. and Beall, A. 2021. Is complex fault zone behaviour a reflection of rheological heterogeneity?. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 379 (2193) 20190421. (10.1098/rsta.2019.0421)
- Sanfilippo, A. et al., 2020. Early-stage melt-rock reaction in a cooling crystal mush beneath a slow-spreading mid-ocean ridge (IODP Hole U1473A, Atlantis Bank, Southwest Indian Ridge). Frontiers in Earth Science 8 579138. (10.3389/feart.2020.579138)
- Ciborowski, T. J. R. et al., 2020. Petrogenesis of Siletzia: the world’s youngest oceanic plateau. Chemie der Erde / Geochemistry 1 100004. (10.1016/j.ringeo.2020.100004)
- Hoare, L. et al. 2020. Melt chemistry and redox conditions control titanium isotope fractionation during magmatic differentiation. Geochimica et Cosmochimica Acta 282 , pp.38-54. (10.1016/j.gca.2020.05.015)
- Zhang, H. , Blenkinsop, T. and Yu, Z. 2020. Timing of Triassic tectonic division and postcollisional extension in the eastern part of the Jiaodong Peninsula. Gondwana Research 83 , pp.141-156. (10.1016/j.gr.2020.01.018)
- Moore, A. et al., 2020. Evidence for olivine deformation in kimberlites and other mantle-derived magmas during crustal emplacement. Contributions to Mineralogy and Petrology 175 (2) 15. (10.1007/s00410-020-1653-8)
- Buchs, D. M. and Oemering, S. A. 2020. Long-term non-erosive nature of the south Costa Rican margin supported by arc-derived sediments accreted in the Osa Mélange. Earth and Planetary Science Letters 531 115968. (10.1016/j.epsl.2019.115968)
- Dick, H. J. B. et al., 2019. Dynamic accretion beneath a slow-spreading ridge segment: IODP Hole 1473A and the Atlantis Bank Oceanic Core complex. Journal of Geophysical Research. Solid Earth 124 (12), pp.12631-12659. (10.1029/2018JB016858)
- Bennett, E. N. et al. 2019. Deep roots for mid-ocean-ridge volcanoes revealed by plagioclase-hosted melt inclusions. Nature 572 (7768), pp.235-239. (10.1038/s41586-019-1448-0)
- Fagereng, A. et al. 2019. Mixed deformation styles on a shallow subduction thrust, Hikurangi margin, New Zealand. Geology 47 (9), pp.872-876. (10.1130/G46367.1)
- Price, M. , Davies, J. and Panton, J. 2019. Controls on the deep water cycle within three-dimensional mantle convection models. Geochemistry, Geophysics, Geosystems 20 (5)(10.1029/2018GC008158)
- Buchs, D. M. et al. 2019. Volcanic contribution to emergence of Central Panama in the Early Miocene. Scientific Reports 9 1417. (10.1038/s41598-018-37790-2)
- Lissenberg, C. J. , MacLeod, C. J. and Bennett, E. N. 2019. Consequences of a crystal mush-dominated magma plumbing system: a mid-ocean ridge perspective. Philosophical Transactions A: Mathematical, Physical and Engineering Sciences 377 (2139)(10.1098/rsta.2018.0014)
- Millet, M. et al. 2016. Titanium stable isotope investigation of magmatic processes on the Earth and Moon. Earth and Planetary Science Letters 449 , pp.197-205. (10.1016/j.epsl.2016.05.039)
- Hastie, A. R. et al., 2010. Geochemistry of Compositionally Distinct Late Cretaceous Back-Arc Basin Lavas: Implications for the Tectonomagmatic Evolution of the Caribbean Plate. Journal of Geology 118 (6), pp.655-676. (10.1086/656353)
Ysgolion
Delweddau
Convergent margins - this research focuses on volcanic, sedimentary and tectonic processes, and the formation and evolution of convergent margins.
Fault mechanics and microstructures - we investigate how faults accommodate slip, seismically and aseismically, and how the range in geophysically observed fault behaviours may be recorded in exhumed rocks.
Mantle geodynamics - we study the dynamics and chemistry of the Earth's interior and how it affects the surface, using primarily large-scale numerical modelling.
Ocean lithosphere processes - we focus on the links between tectonic, magmatic and hydrothermal processes associated with the formation and deformation of oceanic lithosphere at mid-ocean ridges and marginal basins.
Volcanology - we study volcanic processes using theory, experiments, isotope geochemistry, numerical modelling and field observations.
Camau nesaf
Ymchwil sy’n gwneud gwahaniaeth
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