Archean Geodynamics and Environments by Keith Benn, Jean-Claude Mareschal, Kent C. Condie

By Keith Benn, Jean-Claude Mareschal, Kent C. Condie

Released by means of the yank Geophysical Union as a part of the Geophysical Monograph sequence, quantity 164.

The Archean Eon represents 1.3 Gyr of Earth's far away earlier, from approximately 3.8 Ga to 2.5 Ga—nearly one 3rd of our planet's historical past. It used to be throughout the Archean regime of worldwide geodynamics used to be proven, leading to the formation and recycling of the 1st lithosphere, in addition to the formation, development, deformation, differentiation, emergence, and erosion of continents. by means of the top of the Archean, Earth had reached a geodynamic regime ruled via plate tectonic strategies. the resultant environments, at and close to Earth's floor, integrated the several niches during which formative years varieties developed. it truly is to the Archean evolution of Earth that we now glance to raised comprehend some of the tactics that formed the planet, as we all know it.

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If the early Archean is characterized by much smaller continental mass, the effect of internal heating on lithospheric dynamics becomes even more important than suggested by Figure 10. A likely change KORENAGA 27 in the mode of mantle convection is expected to be strongly coupled with the growth of continents. A more refined history of continental growth is much desired from geochemistry, and different modes of mantle convection should be explored for their implications for the petrogenesis of continental crust.

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