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Dr. Fred Gaidies

Associate Professor, Department of Earth Sciences

 
 

 

Sikkim2015

Drinking tea, with Freya George and Tenpa Chophel in North Sikkim, March 2015
 

Current Graduate Students

Freya George
PhD candidate (Ontario Trillium Scholar)
MEarthSci (first class degree with honours), 2014, Oxford University

During her MEarthSci at Oxford University, Freya’s research focused on garnet-metagabbros of the Jijal Complex in Pakistan Himalaya. The main aim was to account for microstructural variations between petrographically and compositionally analogous garnet-metagabbros from different depths of the Kohistan Island Arc. Using compositional data obtained with a JEOL JSM-840A SEM, Freya used the Thermocalc software (Powell & Holland, 1988) to obtain fractionated P-T paths for re-equilibrated garnet in samples from different depths of the arc. The hypotheses of the rocks having formed either by dehydration melting or high-pressure crystallisation from an andesite were also tested, using Thermocalc and AlphaMelts software (Ghiorso & Sack, 1995), respectively.
In her PhD at Carleton, Freya is studying the conditions, rates and processes of metamorphic mineral reactions associated with the burrial and exhumation of the Lesser Himalayan Belt in the Sikkim Himalayas (India). A significant part of Freya's work links high-resolution XR-µCT with geochemical analyses of garnet which will be used to calibrate numerical models of metamorphic crystallization. Metamorphic P-T-X-t paths obtained from THERIA_G modelling (Gaidies et al., 2008) for different structural levels of the Sikkim Himalayas together with high-resolution Lu-Hf garnet and in situ Th-Pb monazite geochronology will provide new constraints on models of Himalayan tectonics.
This project is supported by an Ontario Trillium scholarship and a NSERC Discovery Grant.

 

 

Freya

Carolyn Dziawa
MSc candidate

BScH (Metamorphic petrology), 2014, Carleton University

Carolyn did her BScH on the texture and chemistry of garnet in schists from the Ore Chimney Mine area in SE Ontario based on detailed field, petrographic, geochemical, and XR-µCT work. Given the results Carolyn obtained it is now possible to provide new constraints on the tectono-metamorphic evolution of this part of the Grenville Province.
Carolyn's MSc project takes place in collaboration with the Geological Survey of Canada (Dr. J. Percival, GEM program) and is focussed on the timing and conditions of metamorphism experienced by rocks from the Rae Province. In addition to detailed petrographic studies, Carolyn will acquire and utilize phase equilibria, chemical and isotopic data to help decipher the geological history of this part of Canada's North.
Carolyn's MSc project is supported by a GSC Research Affiliate Program (RAP) bursary and a NSERC Discovery Grant.

 

Carolyn

Yannick Morneau
MSc candidate

BScH (Metamorphic petrology), 2015, Carleton University

During his BScH, Yannick studied the size, shape, position and orientation of elongated metamorphic garnet in regional metamorphosed graphitic pelites of the Flinton Group (Mazinaw Domain, Grenville Province, Ontario). In order to understand the relative timing and conditions of graphite precipitation and its relation to garnet texture, Yannick modelled the influence of fluid composition on equilibrium phase relations during metamorphism using Theriak-Domino software (de Capitani & Petrakakis, 2010). Additional methods applied include XR-µCT, EPMA and XRF.
Yannick's MSc project focusses on the metamorphic petrology of the Snowcap Formation of the Stewart River area (Yukon). Yannick started this research in September 2015 after a two-months field season in the Yukon with researchers from the Geological Survey of Canada (GSC). His MSc research takes place in collaboration with Dr. A. Zagorevski and Dr. J. Ryan (both GSC) integrating detailed petrographic analysis with XRF, EPMA, XR-µCT, phase equilibria and metamorphic crystallization modelling, and SHRIMP U-Pb geochronology.
This MSc project is supported by a GSC Research Affiliate Program (RAP) bursary and a NSERC Discovery Grant.

 

 

Yannick

Balie Walker
MSc candidate

BS (Earth and Space Exploration in Geological Sciences), 2015, Arizona State University

During her undergraduate research at ASU, Balie worked on chondrite meteorites that contain unique assemblages of feldspar and chromite. Using reflected and scanning electron microscopy, Balie documented and classified the textures and microstructures of her samples which indicate various degrees of shock and thermal metamorphism.
Balie's MSc research is a collaborative project with the University of Vienna (Dr. R. Abart) and Charles University Prague (Dr. M. Racek, Dr. T. Larik). It focusses on the 3D microstructure and chemical zoning of garnet, plagioclase and pyroxene of mafic granulites from the Dunkelsteiner Wald (Austria). Results obtained from high-resolution XR-CT, serial sectioning and FE-EPMA will be integrated with detailed field and petrographic analyses and phase equilibria modelling in order to better understand the conditions and fundamental processes of the microstructure formation.
This MSc project is supported by a NSERC Discovery Grant.

 

 

Balie

CobaltLake
The Bugaboo team (August 2013): B. Hamilton (Calgary), F. Gaidies and A. Petley-Ragan (Carleton), R. Nair and D. Pattison (Calgary)