Evolution of crust formation through time; Hadean geodynamics; mode and effect of cratonization; influence of crustal composition on other Earth systems; modeling of complex datasets; high precision geochronology of complex samples
B.S., Geology, Hope College, 2009
M.S., University of Alberta, 2011
Ph.D., University of Alberta, 2015
Jesse Reimink is broadly interested in how the crust was formed, deformed, and recycled, particularly on the early Earth. His Ph.D. work was spent mapping within the remote Acasta Gneiss Complex in the Northwest Territories, Canada, an area widely regarded to contain the oldest known evolved crust on Earth. To investigate the formation of evolved crust through time, he employs a wide variety of radiogenic and stable isotope systems including zircon U-Pb, oxygen, and hafnium isotope systems as well as whole rock elemental signatures together with Nd and W isotope data.
In his work at DTM, Reimink will use fundamental geochemical techniques (elemental compositions, U-Pb geochronology) as well as geochemical tracers (feldspar Pb isotope, zircon O and Hf isotope, whole-rock Nd and W isotope analyses) in order to elucidate the timing, processes, and sources of continental crust formation through time. These data will come from understudied rocks within the Slave Craton basement complex, which preserves an excellent record of magmatism throughout the Archean. He will conduct a sampling campaign covering a large regional and temporal range during the 2016 field season. In the case of the Slave Craton, this crustal dataset will be linked to well-studied mantle samples coming from the Northwest Territories diamond fields. There is a great deal of potential for using the resulting data set from this study as inputs to geodynamic models of mantle convection and crust formation on the early Earth.
Recently, Reimink became interested in developing novel techniques for use in modeling complex datasets and the impact of these techniques on the collection interpretation of radiogenic isotope data. At the moment, Reimink and his colleagues have developed procedures designed for analysis of detrital zircon U-Pb, as well as oil field Re-Os datasets. These methods show potential for expansion into other data types, and may potentially be scaled up for the evaluation of age relationships at the terrane and orogen scale.