TITLE:
The Model of Oceanic Crust Expansion
AUTHORS:
Daoxiong Hu
KEYWORDS:
Oceanic Crust Expansion, Oceanic Crust Top Mounting
JOURNAL NAME:
International Journal of Geosciences,
Vol.5 No.13,
December
25,
2014
ABSTRACT: Oceanic crust expansion
belt is the largest extensional structure on the earth. All the crustal
movement theories have to face the phenomenon of oceanic crust expansion. The
paper tries to interpret the phenomenon of oceanic crust expansion by the
volume change of the earth and the satellite data. The oceanic crust expansion
is the result of the volume change of the earth. The volume change of the
earth’s mantle is the element causing the volume change of the earth; the state
variation of the solid matters within the earth is the element leading to the
volume increase of the earth’s mantle; while the discharge of liquid matters
within the earth is the element leading to the volume decrease of the earth’s
mantle. The process of oceanic crust expansion can be divided into two phases—expansion
and top mounting. The phase of expansion is the volume increase of the earth’s mantle,
that is, the state variation of the solid matters within the earth leading to
the oceanic crust expansion. The phase of top mounting is the volume decrease
of the earth’s mantle; that is, the matters of the earth’s mantle (new oceanic
crust) are uplifted to be the oceanic crust matters under the action of
buoyancy, which is one of the ways to discharge the matters within the earth.
The expansion phase of the oceanic crust is the extensional movement period of
the earth’s crust. The top mounting phase of the oceanic crust is the
compressive movement period of the earth’s crust, that is, the subduction
period of the oceanic crust. The speed of oceanic crust expansion is related to
the state variation speed of the matters within the earth. The width of the
oceanic crust expansion is related to the temperature of the seawater. The
temperature of the hydrothermal flow in the oceanic crust expansion belt is
related to the speed of oceanic crust expansion. The oceanic ridge terrain in
the oceanic crust expansion is related to the thickness of the same density
stratification above the earth’s mantle.