Isotope Geochemistry and Geochronology

Many of our past isotopic studies involved understanding the tectonic and magmatic evolution of world-wide orogenic belts, ranging in age from Paleoproterozoic to Miocene. Because of the enormous utility of radiogenic isotopes in earth sciences, however, a wide variety of other, non-tectonic based studies were also pursued over the years. These studies include using Sr isotopes as a hydrologic tracer for watersheds (Peru, Wyoming and New York); using Nd and Sr isotopic compositions of phenocrysts as a powerful tephrochronologic tool; determining ancient seawater 87Sr/86Sr to constrain ages of critical Cenozoic stratigraphic sections; using Pb isotopes to help source archeological artifacts; development of new methods for provenance studies (Nd isotopes in detrital monazite); isotopic zonation in apatite to constrain magma mingling models; and using radiogenic isotopes in novel environmental studies (e.g., documenting land fill breaches).

Welcome to the Samson Research Group

Scott in Maroc

One of the critical functions of the radiogenic lab has been, and continues to be, determining highly accurate and precise Nd, Sr and Pb isotopic ratios from a wide variety of sample matrices (e.g. silicate whole-rock powders, minerals, water samples, carbonates, etc.). Read more...