Plate Motions, Mantle Convection And Chaos
Author(s)
S. Qu´er´e & A. A. Berezin
Abstract
Plate tectonics is the theory that the earth’s lithosphere divided into several plates
is linked to processes taking place deep inside the Earth. The motion of the plates
can be divided into two terms: the horizontal divergence (ridge-trench system) and
the radial vorticity (transform faults and plate spin). At present-day, the degree
variance of the horizontal divergence presents two peaks at degrees 4 and 5. So
far, these two peaks have been explained by (1) the dominant large scale flow
that drives the plates (4000 km) and/or (2) the Pacific plate. In this paper, we
propose a new explanation. We compare the two published plate reconstructions
that span the Mesozoic and Cenozoic periods by imposing each of them on top of
a convective code. While the constructal theory provides a conceptual framework
for our modeling, we venture to mention the possibility of a presence of chaotic
behavior in the self-organization of plates linked to mantle convection.
Keywords: plate tectonics, mantle convection, plate motion reconstruction,
constructal theory, chaos theory.
Keywords
Keywords: plate tectonics, mantle convection, plate motion reconstruction,
constructal theory, chaos theory.
Related Book
Other papers in this volume
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