Dr Thomas Knott

XRF Geochemist

Contact:
T: 0116 252 3817
E: trk2@le.ac.uk

Research group: Volcanoes, Tectonics and Mineral Resources

Primary Responsibilities

  • Operational responsibility for the PANalytical Axios Advanced PW4400 X-Ray spectrometer located in the Department of Geology.
  • specialise in the qualitative and quantitative inorganic XRF chemical analysis of rocks, minerals, soils, ceramics, concretes, cements, fired clay products and other related materials (e.g, slags and ashes) for research, teaching and commercial enterprises.

Research Interests

Tom at Backwaters
Tom Knott sitting at the base of the 20-30m thick Grey's Landing Ignimbrite.

I am interested in the magnitude, frequency, petrogenesis, and emplacement history of large-scale explosive silicic volcanism. More specifically I am investigating mid-Miocene explosive super-eruptions from the Yellowstone hotspot track, with an emphasis on the rhyolitic pyroclastic record in the central Snake River Plain, Idaho, USA.

I implement a multi-technique approach to characterise individual 'Snake River type' eruption-units and establish widespread (10,000's km2) correlations. Such correlations have been achieved by combining identifiable field criteria with geochemical, mineralogical, palaeomagnetic, and geochronology data. This has lead to the discovery of previously unidentified super-eruption records in the central Snake River Plain, with colossal erupted volumes (several 1000's km3).

For more information please visit our website: http://leicester-geology.beardyscientist.com/volcanology/snake-river-plain.html

Recent publications:

  • Knott, T.R., Reichow, M.K., Branney, M.J., Finn, D.R., Coe, R.S., Storey, M., Bonnichsen, B. 2016,  Rheomorphic ignimbrites of the Rogerson Formation, central Snake River plain, USA: record of mid-Miocene rhyolitic explosive eruptions and associated crustal subsidence along the Yellowstone hotspot track: Bulletin of Volcanology, 78(4), 1-25, doi: 10.1007/s00445-016-1003-x
  • Knott, T.R., Branney, M.J., Reichow, M.K., Finn, D.R., Coe, R.S., Storey, M., Barfod, D., McCurry, M. 2016,  Mid Miocene record of large-scale Snake River-type explosive volcanism and associated subsidence on the Yellowstone hotspot track: The Cassia Formation, Idaho, USA. Geological Society of America Bulletin, 27 pp. doi: 10.1130/B31324.1.
  • Finn, D.R., Coe, R.S., Kelly, H., Branney, M.J., Knott, T.R., Reichow, M.K., 2015, Magnetic anisotropy in rhyolitic ignimbrite, Snake River Plain: implications for using remnant magnetism of volcanic rocks for correlation, paleomagnetic studies and geological reconstructions. Journal of Geophysical Research: Solid Earth, 120: 4014–4033, doi: 10.1002/2014JB011868.

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