Uri Ryb

Senior Lecture
My overarching research goal is to study the interactions among Earth-internal and Earth-surface
processes by observing and quantifying the fluxes of matter exchange between the lithosphere,
hydrosphere and atmosphere. These interactions are fundamental factors in the rock cycle, global climate,
and the evolution of life; they occur over geological timescales, and therefore are best expressed by
variations in the texture and composition of the minerals and rock records. In recent years, my research
has been focused on the development of new application of clumped isotope thermometry to the
reconstruction of the oxygen isotope composition of the ocean and surface dynamics in the Phanerozoic.
My group at HUJI focuses on three main goals:
1) Study if and how the Precambrian growth and stabilization of the continental lithosphere have
affected surface processes, and through them the global oxygen and carbon cycles, the rise of
atmospheric oxygen and the evolution of life.
2) Developing new analytical and modeling tools aimed to refine thermal compositional and
deformational histories of sedimentary basins and metamorphic environments.
3) Test alternative hypotheses for the ‘Dolomite-Problem’ and the study the relationship between
dolomitization and the Ocean Mg/Ca ratio in the geological past.
Future studies will involve field trips to Thassos (Greece), North America (Canadian Shield, Wyoming),
and Northern Europe, cutting-edge geochemical tools and modeling.