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Recent Graduates
Tina
Ziten, M.Sc. 2008
Denis
Lacelle, Ph.D. 2007
Denis research interests
revolve around the use of environmental isotopes and low temperature
geochemistry and focuses on two main themes:
i) carbonate geochemistry in
polar regions and Quaternary climate change; and
ii) ground ice processes and
interactions between permafrost and glaciers.
Shane Greene,
M.Sc. 2005.
Shane has been underground at the Lupin Mine up on the Barren Lands,
and a mile down in the Con Mine, Yellowknife, sampling for noble
gases. His research is unravelling the age and recharge temperatures
of groundwaters in these two Canadian Shield
mines. He deployed a diffusion sampler to simplify the collection of
gases from groundwater. The interest is related to the recharge and
movement of water in deep crystalline settings, and in particular, in
permafrost.
Raphaelle Cardyn, M.Sc. 2005.
Raph is working at liquid helium temperatures to extract gas
from ice cores collected from Mount Logan.
Her aim is to develop a chronology for the core based on the O2 and
Ar concentrations. Exciting stuff. So far she has built a new
extraction line in the G.G. Hatch Laboratory, and is now working on
calibrating the mass spectrometer for her samples.
Sean Farrell, M.Sc. 2004.
Sean is working at the high temperatures of carbonatite
volcanism, looking at the variations in 34S in sulphide phases. We
have the expertise of two world renown researchers in carbonatite
mineralogy, genesis and mantle dynamics. Dr. Keith Bell, Carleton
Earth Sciences, is a co-supervisor and brings his extensive
experience (and samples) from the Kola Peninsula in Russia, and from other
international localities. Dr. Don Hogarth, from our department, is
providing local experience and samples from carbonatite sites in
western Quebec.
Nick
Battye, M.Sc.
Co-supervised with Dr. Tom Kotzer (AECL). Nick completed his
B.Sc. in our department working on latitudinal distribution of C-14.
He is now looking at the noble gas concentrations of northern
groundwaters. The temperature- dependency of these gases in water,
and their inert character, allow calculation of recharge
temperatures. His first field trip was to sample Canadian Shield
brines in the Con Mine, Yellowknife.
This field season, he will be sampling karst groundwaters from
perennial flow systems in the continuous permafrost regions to
establish the temperature and seasonality of recharge in talik, in an
effort to study the impacts of climate warming on permafrost
hydrology.
Denis Lacelle, M.Sc. 2002
Co-supervised with Dr. Bernard Lauriol (Department of
Geography). Denis has spent two seasons hanging from cliffs in the
Arctic, sampling the face of thermokarst scars that are melting back
across hectares of permafrost terrain in the Richardson Mountains.
His analyses of stable isotopes in the ice show that much of the
sequence is remnant ice or re-frozen meltwater from the Laurentide
Ice Sheet. Denis has also been sampling Laurentide ice that outcrops
at the base of the Barnes Ice Cap on Baffin
Island. This work, in conjunction with Dr. Chris
Zdanovitch at the Geological Survey of Canada, will form the basis of
his doctoral research.
Rob Renaud, M.Sc. 2002
Co-supervised with Dr. Tom Kotzer. Rob completed his thesis
on the transport and partitioning of Iodine-129 in a natural
groundwaters at the Sturgeon
Falls site, Ontario. His
work looks at the pre- and post-thermonuclear bomb testing
concentrations of I-129 in groundwaters, as part of our program to
look at the distribution and fate of this safety-relevant reactor
waste radionuclide in the natural environment.
Lori Henderson, M.Sc. 2000
Lori completed her thesis on the past variations of CO2
archived in the firn ice of the Devon Island Ice Cap in the Canadian
Arctic. Lori and I spent much of the spring 1998 with Jerome
Chappelaz (University of Grenoble) and Fritz Koerner and David Fisher
(Geological Survey of Canada) drilling an ice core for climate
research. Lori is now working with Environment Canada in charge of
assessing the Canadian Inventory of CO2 emissions, as a
basis for addressing the Kyoto Protocols.
Andrea Cherry, M.Sc. 2000
Andrea spent two field seasons in southeastern Manitoba drilling
and sampling groundwaters in a GSC sponsored program to evaluate
recharge rates in the Sandilands Aquifer that is so important to much
of the local rural population. She undertook a detailed survey of
groundwater ages using CFCs and tritium. After a successful defense,
Andrea headed west to spend the winter with John Buckle (and the
winter 2001) riding snowboard. She now works as a hydrogeological
consultant with Water and Earth Science Associates in Carp, Ontario.
Nic Alvarado-Quiroz, M.Sc. 1998
Nic came with a degree in chemistry to study the geochemical
behaviour of an important nuclear-safety relevant nuclide – 129I.
His work involved the sampling and analysis of iodide and 129I
in the area around the AECL Nuclear Laboratories at Chalk River, Ontario,
and is now summarized in a paper sent to Radiochimica Acta. Nic is
now doing his Ph.D. on U and Th in seawater with Dr. Sanchez at the
University of Texas A&M.
Graham Phipps, Ph.D., 1998
Graham undertook an extensive survey of groundwaters at the Myra
Falls Mine in Strathcona Provincial Park,
Vancouver Island, for geochemical
exploration and mine environment. The study was coordinated and
managed scientifically by Dr. Dan Boyle, of the Geological Survey of
Canada. Dan, a geochemist of international reputation, passed away in
2000 following a short bout with cancer. Graham’s research is
being prepared for publication in a special volume of Geochemical
Exploration dedicated to Dan Boyle. Graham is now the head
hydrogeologist for the Province
of Manitoba.
Malcolm Douglas, M.Sc. 1997
Malcolm spent a lot of time underground in the Con Mine, Yellowknife,
sampling the brines. His research used the Con Mine as an analogue
for the perturbations that a radioactive waste repository would have
on the local hydrogeological flow system. He sampled waters for
geochemical and isotope analysis, and modeled the rates of
circulation. Findings from this research, published in two papers
(see below) showed that a lens of glacial meltwater has sat in the
subsurface since the period of deglaciation about 10,000 years ago.
Malcolm is now in the U.K.
working as a consultant for an environmental firm.
Greg Cane, M.Sc. 1996
Greg undertook a fascinating study looking at the
contaminants that move through farmers fields into the regional
aquifer that the rural population relies on in Eastern Ontario (near Cornwall). He
showed a systematic seasonal change in the amount of water moving
directly through fields, that mixes with regional (natural) recharge
pumped from farmers’ wells. Greg published his findings in
Groundwater, and now has a great job with the Isotope Laboratory at Princeton University as a research
technologist.
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