Information - BG1.01 Geodynamic and Metabolic Cycles of the Young Earth
Two recent developments have stimulated interest in the way the Hadean to Archean Earth functioned. The first is the continuing geochemical investigation of Hadean zircons from Jack Hills, which appear to show that 4.4 Ga ago, the Earth's surface was cold and wet. The second is the flood of new information bearing on the origin of life - where and how if first appeared and how it evolved. Other important issues are the rate and manner in which the continental crust formed; geodynamics of the Archean mantle and the nature of oceanic crust; the onset of subduction and the characteristics of Archean subduction zones; deformation of Archean continental lithosphere; changes in the temperature and composition of the oceans and atmosphere.
Contributions to the session are welcome from field geologists, petrologists, geochemists, biochemists, structural geologists, planetologists, thermal modellers and all other scientists interested in the young Earth.
Preliminary List of Solicited Speakers
Roger Buick, Dept. Earth and Space Sciences & Astrobiology Program
University of Washington
Euan Nisbet, Royal Holloway, Univ London
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