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2. CLASSIFICATION OF THE GEODYNAMIC SYSTEMS
For segregation the geodynamic systems and their components the
following parameters were used: a) the composition and structure of geological
bodies, b) the age and evolution of litospheral stratums, blocks and segments,
c) the energetic and other features of the thermodynamic state of the earth’s crust
and upper mantle in modern or past geological epochs, d) the direction and,
whenever possible, intensity of acting regional and global forces, resulting to
vertical and horizontal movements of geological bodies (Smyslov,1983).
The Geodynamic systems, that shown as a basis of the present Metallogenic
map, have been subdivided on different age, scale, thermodynamic regime of
degassing the protonic hydrogen out of the core, geodynamic and tectonic
movements and types of the earth’s crust. The geodynamic systems are the self-
regulating geological structures, where the processes of substantial
differentiation, energetic and structural rebuilding have been arisen by
cooperation of global ( core-mantle ) and regional ( crust ) forces of the
Earth (Table 4).
The hierarchy and classification of geodynamic subdivisions should be
allow, alongside with usual parameters: (sizes, morphology, composition), the
interconnection of the energetically sources and active forces, moving to
directional and unalterable development of the Earth. In view of this position,
the geodynamic zoning of lithosphere of the Earth was conducted, for which
geodynamic system is accepted as the major one unit for measurement. In the
hierarchy it holds the central place and corresponds in its scale to such
morphotectonic units as continents and oceans, with a subdivision into global,
regional and local types. As for morphology, the division make into polygonal
and linear types (Table 5).
The following polygonal geodynamic systems are being selected (based
on the features of vertical movements
):
1. with dominating elevation – the Precambrian cratons, shields,
granite-
gneisis domes, median massives;
2. with intensive elevation after considerable depression (till 5-10 km) –
the polygon-geosynclinal-folded areas of Phanerozoic;
3. with directional and long-lived depression - the deep uncompensated
whipping with maximum (10-20 km) for earth’s crust depression and power
sediments.
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Table 4
Classification of the geodynamic systems of the pulsating-expanding Earth
( Krutoyarskiy et.al.,2000 )
Scale of
geodynamic
systems
Thermodynamic
regime of the
degassing protonic
hydrogen
from core
Tectonic and
geodynamic
movements
Geodynamic systems
of the different orders
1
2
3
4
Global
constructions
of continents
Having warmed up
core, cloudy, funnel-
shaped
or ink-jet
cyclic degassing of
the protonic
hydrogen through
mantle
and earth
crust.
In early Archean the
regime of the near-
surface fine-meshed
convection.
1.Continental
cratonization
(preferable
elevation
and stabilization).
2.Intracratonic
geosynclinals
(at first depression,
then elevation).
3. Areas of tectono-
magmatic activating
(plutonic faults and
elevation of magma).
Shield composed from initial
cratons, granite-gneisis
domes and blocks, granite-
greenstone belts.
Median massifs.
Intracratonic geosynclinals
belts, intercontinental and
marginal volcanic belts.
Trapp provinces, kimberlite
provinces, carbonatite fields
and alkaline provinces.
Regional
constructions
of continents
Having warmed up
core, cyclic
degassing of
protonic hydrogen
through
mantle and
earth crust.
1.Differentiated
movements.
2.Preferable
depressing.
3.Tension with
intensive depressing
and sedimentation.
4.Spreading with
depressing
(linear riftogenesis).
Platforms with plate cover.
Marginal submountaines
depressions.
Orogenic depressions. Deep
uncompensated depressions.
Deep depressions with
mantle magmatism.
Orogenic depressions.
Avlacogens.
Continental rifts.
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Regional
transitive
zones from
continents to
oceans.
Having warmed up
core, cyclic
degassing of the
protonic hydrogen
(jet-planar) through
mantle and earth
crust.
1.Differentiated
movements.
2.After
intensive
depressing,
folding
and elevation.
3.Tension,
depressing, elevation
and contraction
Shelf’s areas:
passive and active.
Miogeosynclinales,
eugeosynclinales,
geosynclinal throughs.
Island arcs:
unvolcanic and volcanic.
Deep-sea troughs and arbors,
accompany them.
Global
destructive
constructions
of oceans.
Having warmed up
core, cyclic
degassing of the
protonic hydrogen
(jet-planar) through
mantle and earth
crust.
1.Preferable
tension
and depressing
(linear-riftogenesis).
2.Linear elevation
(orogenes).
3. Elevation.
4.Tension and
depressing,
mantle volcanism.
Georiftogenales: with rift
valley and without rift valley.
Mid-oceanic ridges and their
slopes.
Oceanic plateaus, ridges,
volcanic ridges.
Talassocratons (oceanic
platforms).
Transformic faults.