School of Earth and Environment

Geoff Lloyd Dr Geoff Lloyd

Reader: Microgeodynamics

Telephone number: +44(0) 113 34 35209
Email address: eargel@leeds.ac.uk
Room: 9.152
PA details: Geoffrey E. Lloyd G.E.Lloyd@leeds.ac.uk +44(0) 113 34 35209

Biography

I am Reader in Microgeodynamics in the Institute of Geophysics and Tectonics. I have acted as Secretary of the Tectonic Studies Group of the UK and Ireland and sat on the Electron Microscopy Committee of the Royal Microscopical Society.

I am a founder-member of the LEMAS (Leeds Electron Microscopy and Spectroscopy) Centre, in collaboration with the Institute of Materials Research at Leeds, which provides electron microscopy services to meet both internal and external demands.

Qualifications

1975 B.Sc. Geology and Geography, Univesity of Nottingham

1979 M.Phil. Structural and Numerical Geology, University of Nottingham

1984 Ph.D. Structural Geology, University of Birmingham

Memberships/Fellowships

F.G.S.

F.R.M.S.

Member, A.G.U.

Research Interests

I am a structural geologist with particular interest in microstructural evolution and deformation processes, although I have interest also in the regional geology of SW England, NW Scotland, the western Alps and the NW Himalaya. My early research career focussed on the formation of boudinage and related features, including their usage in strain analysis, and particularly the recognition, measurement, interpretation and significance of crystal lattice preferred orientation (LPO) development in rocks and analogue materials (i.e. metals and ceramics) using electron channelling in the scanning electron microscope. My interest in the latter has continued throughout my career to the present and today involves use of SEM electron backscattered diffraction (EBSD) to characterise the orientation and misorientation characteristics of minerals, rocks, metals and ceramics, from which various petrophysical properties can be derived. My current research therefore involves using petrofabric-derived seismic properties to explain and interpret seismic data in terms of large scale geodynamic processes in both the crust and mantle. In addition, I am particularly interested in the geologicalk evolution of the Rhoscolyn area of Anglesey, a location popular for undergraduate field teaching.

Teaching Interests

I teach at all undergraduate levels within the School. Obviously, my main teaching involves Structural Geology (including Geomechanics) but I have also taught Computing and Statistics, Mineralogy and Petrology, and various aspects of Maps and Stratigraphy.My teaching is heavily practical and field based. As such, I have led/taught on many of the School's field classes (Pembroke, NW Scotland, Lake District, Anglesey, Connemara, SW England), whilst I have supervised undergraduate mapping projects in a number of locations (e.g. Lizard, N. Cornwall, N. Devon, SW, W, NW and N. Highlands, S. France, French and Swiss Alps). More recently, I have co-develloped a project to develop 'virtual geological landscapes' using the Unity game engine, with particular emphasis on brodening outreach and inclusivity for students unable to participate in fieldwork.

Support duties

I am a member of both the Geological Sciences B.Sc. and Structural Geology with Geophysics M.Sc. Programme Development Teams, as well as the core GS PDT team.

I have performed the role of Undergraduate Mapping Project Module Leader for over a decade.

I am the Module Leader for the M.Geol. Independent Research Project module.

For many years I have acted as the convenor for the School Kennedy Library and University Library representative for Earth Sciences and now the School of Earth and Environment.

SEM and Microprobe facility

In 2009 I was part of the project team to replace the School's SEM and microprobe facilities. We obtained 50% matched funding from HEFCE and the instruments were commissioned in 2010-11. Both are modern, top-of-the-range instruments, optimised for geological sample analysis. We are a small research facility (SRF) and welcome enquiries for use. More information, contact details, sample images and data can be found on the Facilities web page. In 2016, I was similarly part of the project team that gained matching funds to replace the old Rock Deformation Research SEM, acquired when RDR was purchased from private/university ownership.

Project details

Project title

Structural and mechanical properties of and processes within the orogenic middle crust (PhD project; Amicia Lee)

Supervisors

Taija Torvela, Geoff Lloyd, Andrew Walker

Funding

School of Earth & Environment Teaching Assistantship

Project outline

The overall aim of the project is to understand middle and lower (M/L) crustal structure and behaviour during orogenesis, and especially during lateral orogenic spreading as seen today in the Tibetan Plateau. Some of the important questions that address this are: i) how weak is the M/L crust overall and what is its rheological behaviour; ii) what are the structural patterns in the M/L crust associated with orogenic spreading; iii) how does partially molten material behave during deformation at a microstructural scale; iv) can e.g. seismic anisotropy be used to investigate M/L crust in situ; and v) what processes can be inferred from the observed structural geometries, crystallographic, seismic, and rheological properties, and how can they drive orogenic spreading. The PhD project addresses some of these questions by e.g. field work and laboratory (SEM/EBSD) analyses of exposed analogues to M/L orogenic (Tibetan) crust, in order to study structural patterns in the M/L crust, and to infer e.g. rheological properties through high-T crystallographic behaviour of partially molten rocks.

Publications