Photo of Braden R.B. Gregory

Braden R.B. Gregory

Ph.D. Candidate, Lab Manager

Degrees:M.Sc. (McMaster University)
Phone:613-520-2600 x 1851
Office:240 Steacie Building,
Carleton University
1125 Colonel By Dr.
K1S 5B6

Braden Gregory is a PhD candidate at Carleton University that uses of testate amoeba and core scanning x-ray fluorescence to reconstruct paleo-arsenic and paleoclimate changes in subarctic lakes near Yellowknife, NWT. Gregory focus on aquatic micropaleontology (foraminifera and arcellinidans), paleolimnology in the Arctic, isotope geochemistry, coastal geology and catastrophic event stratigraphy (hurricane and tsunami overwash), and Quaternary climate change, particularly the response of climate cycles (ENSO, NAO, PDO, etc,) to changes in climate.

Gregory’s current research project has two main focuses: 1) Developing the use of Itrax core-scanning X-ray fluorescence as a method for generating high-resolution geochemical data from sediments material recovered with a freeze corer; and (2) using testate amoeba (Arcellinida) to establish paleo-health and possible historic contamination in the lakes near Yellowknife. Preliminary work on lakes surrounding Yellowknife shows Arcellinida species correlate to arsenic in surface sediments. Further work is needed to determine whether this relationship persists in sediments down core, allowing Arcellinida to be used as a proxy for paleo-arsenic concentrations.