CN108562953B - A kind of the physical analogy analysis method and device of plate subduction recession - Google Patents
A kind of the physical analogy analysis method and device of plate subduction recession Download PDFInfo
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- CN108562953B CN108562953B CN201810250612.4A CN201810250612A CN108562953B CN 108562953 B CN108562953 B CN 108562953B CN 201810250612 A CN201810250612 A CN 201810250612A CN 108562953 B CN108562953 B CN 108562953B
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- 238000004458 analytical method Methods 0.000 title claims abstract description 16
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 97
- 239000004576 sand Substances 0.000 claims abstract description 49
- 239000000741 silica gel Substances 0.000 claims abstract description 48
- 229910002027 silica gel Inorganic materials 0.000 claims abstract description 48
- 238000011010 flushing procedure Methods 0.000 claims abstract description 24
- 235000012907 honey Nutrition 0.000 claims abstract description 18
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 7
- 238000001125 extrusion Methods 0.000 claims description 28
- 238000004088 simulation Methods 0.000 claims description 28
- 239000000463 material Substances 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 14
- 230000008014 freezing Effects 0.000 claims description 4
- 238000007710 freezing Methods 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 241000208340 Araliaceae Species 0.000 claims 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 claims 1
- 235000003140 Panax quinquefolius Nutrition 0.000 claims 1
- 235000008434 ginseng Nutrition 0.000 claims 1
- 239000010410 layer Substances 0.000 description 43
- 238000002474 experimental method Methods 0.000 description 9
- 238000010835 comparative analysis Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 239000002344 surface layer Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 241000237983 Trochidae Species 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000916 dilatatory effect Effects 0.000 description 1
- 230000009189 diving Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V20/00—Geomodelling in general
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- Physics & Mathematics (AREA)
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- General Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Geophysics (AREA)
- Management, Administration, Business Operations System, And Electronic Commerce (AREA)
Abstract
The present invention provides the physical analogy analysis method and device of a kind of plate subduction recession, which is a groove body comprising subduction of oceanic crust system, continental crust raise flushing system, asthenosphere and power-driven system；Subduction of oceanic crust system successively includes oceanic crust lower part layer of silica gel, oceanic crust middle part layer of silica gel and oceanic crust top sand from bottom to top；It successively includes continental crust lower part layer of silica gel, continental crust middle part layer of silica gel and continental crust top sand that continental crust raises flushing system from bottom to top；Power-driven system includes the first drive motor, the first force baffle, the second drive motor and the second force baffle；Asthenosphere is honey, is located at the bottom of the groove body.The present invention also provides the physical analogy analysis methods of plate subduction recession.The formation mechenism of extentional basin after plate subduction recession and arc can be determined using the physical analogy analysis method and device of plate subduction provided by the present invention recession.
Description
Technical field
The present invention relates to the physical analogy analysis methods and device of a kind of plate subduction recession, belong to physical modeling technology neck
Domain.
Background technique
It is the important composition stage of Wilson's evolution cycle that oceanic plate, which dives along trench to continental plate, and oceanic plate exists
Cause underriding angle as depth gradually increases since autologous density is gradually increased in process of subduction, and then after generation plate subduction
Remove phenomenon.Being withdrawn backward due to subducted oceanic crust plate causes continental crust to raise punching block lower part to the migration of oceanic crust direction, and then generates arc
Dilating effect forms extentional basin after arc afterwards.Since extentional basin is conducive to source rock development after arc, usually become oil-gas accumulation
Main place.
Therefore, a kind of physical simulating method of plate subduction recession is needed, determines that plate subduction recession leads to arc to analyze
The formation mechenism in basin afterwards provides foundation for in-depth oil-gas bearing basin formation theory.
Summary of the invention
In order to solve the above shortcomings and deficiencies, the purpose of the present invention is to provide a kind of physics moulds of plate subduction recession
Quasi-analytical method.
The object of the invention is also to provide a kind of physical analogy analytical equipments of plate subduction recession.
In order to achieve the above objectives, the present invention provides a kind of physical analogy analytical equipment of plate subduction recession, which is
One groove body comprising: subduction of oceanic crust system, continental crust raise flushing system, asthenosphere and power-driven system；
The subduction of oceanic crust system successively includes on oceanic crust lower part layer of silica gel, oceanic crust middle part layer of silica gel and oceanic crust from bottom to top
Portion's layer of sand；
It successively includes in continental crust lower part layer of silica gel, continental crust middle part layer of silica gel and continental crust that the continental crust raises flushing system from bottom to top
Portion's layer of sand；
The power-driven system includes the first drive motor, the first force baffle, the second drive motor and the second force
Baffle；
The asthenosphere is honey, is located at the bottom of the groove body；
It is described first force baffle, second force baffle be located inside the groove body, respectively with two opposite sides of the groove body
Face is parallel, and the bottom surface of the first force baffle, the second force baffle is just contacted with honey top surface respectively；First driving
The screw that motor and the second drive motor penetrate two opposite flanks of groove body by two respectively with the first force baffle, the
Two force baffles are connected, so that the first force baffle, the second force baffle move back and forth；
The subduction of oceanic crust system and continental crust are raised flushing system and are located inside the groove body, apply between the first force baffle, second
Between power baffle, each layer of correspondence that the subduction of oceanic crust system and continental crust raise flushing system is contacted with each other and is corresponded at the upper plane of each layer
In same level, wherein oceanic crust lower part layer of silica gel, continental crust lower part layer of silica gel are layed on honey, in the middle part of the oceanic crust
Layer of silica gel, layer of silica gel is located at oceanic crust lower part layer of silica gel, on the layer of silica gel of continental crust lower part in the middle part of continental crust, oceanic crust top sand
Layer, continental crust top sand are located at layer of silica gel in the middle part of oceanic crust, on the layer of silica gel of continental crust middle part.
In above-mentioned apparatus, the "lower" refers to that, close to the direction of asthenosphere, the "upper" refers to the side far from asthenosphere
To.
In above-mentioned apparatus, it is preferable that the groove body is cuboid.
In above-mentioned apparatus, it is preferable that the groove body side bottom is provided with aperture, and is equipped with port lid outside aperture.
In above-mentioned apparatus, it is preferable that the color of the oceanic crust top sand and continental crust top sand is different.
The present invention also provides a kind of physical analogy analysis method of plate subduction recession, this method is using the plate
Dive what the physical analogy analytical equipment dropped back was realized comprising following steps:
(1) the theoretical pass between the underlying parameter and the underlying parameter of institute's target plate subduction to be simulated recession is obtained
System, wherein the underlying parameter includes lift height, density, the viscosity of continental crust plate, the lift height of oceanic crust plate, density,
Viscosity, the depth of asthenosphere, density, viscosity；
(2) according to the hierarchical attribute feature of continental crust plate, oceanic crust plate and asthenosphere, continental crust plate, oceanic crust plate are selected
And the simulation material of asthenosphere；And the theory relation according to step (1) between underlying parameter and the underlying parameter and
The property parameters of those simulation materials are respectively set in preset ratio, further according to selected simulation material and the attribute of simulation material
Parameter constructs the physical analogy analytical equipment of the plate subduction recession；
(3) implement the underriding simulation of oceanic crust plate unilateral side: subduction of oceanic crust system being implemented to squeeze with certain extrusion speed and is answered
Power squeezes and carries out an automatic camera and a 3-D scanning after a certain period of time, to observe the deformation on continental crust top sand surface
Feature；Measure the underriding inclination angle of a subduction of oceanic crust system simultaneously, and determine squeeze distance (underriding distance) and underriding inclination angle it
Between relationship with analyze subduction of oceanic crust system recession changing rule；
(4) implement oceanic crust plate subduction, continental crust plate jams simulation: with identical extrusion speed in step (3) to ocean
Shell hell system implements extrusion stress, meanwhile, flushing system is raised to continental crust respectively with different extrusion speeds and implements extrusion stress, is squeezed
Pressure carries out an automatic camera and a 3-D scanning after a certain period of time, to observe the deformation behaviour on continental crust top sand surface；
The underriding inclination angle of a subduction of oceanic crust system is measured simultaneously, and determines the relationship between squeeze distance and underriding inclination angle to analyze ocean
The changing rule of shell hell system recession；
(5) implement oceanic crust plate subduction, continental crust plate stretching, extension simulation: with identical extrusion speed in step (3) to ocean
Shell hell system implement extrusion stress, meanwhile, with certain rate of stretch respectively to continental crust raise flushing system implement stretching, extension stress, one
An automatic camera and a 3-D scanning are carried out after fixing time, to observe the deformation behaviour on continental crust top sand surface；Simultaneously
The underriding inclination angle of a subduction of oceanic crust system is measured, and determines that the relationship between squeeze distance and underriding inclination angle is bowed to analyze oceanic crust
The changing rule of flushing system recession；
(6) deformation behaviour and squeeze distance and underriding on the continental crust top sand surface according to obtained in step (3)-(5)
Relationship between inclination angle determines the formation mechenism of extentional basin after plate subduction recession and arc.
In the above-mentioned methods, the theory relation between the underlying parameter and the underlying parameter is those skilled in the art
Disclosed technical parameter.
In the above-mentioned methods, the hierarchical attribute feature of the continental crust plate, oceanic crust plate and asthenosphere include continental crust plate,
The lithology of oceanic crust plate and asthenosphere, density, viscosity etc..
In the above-mentioned methods, described " preset ratio " refers to the ratio of size and size in practice in model, such as required
Lift height and the different materials in the physical analogy analytical equipment that plate subduction is dropped back of the target continental crust plate of simulation, oceanic crust plate
Ratio between the thickness of material, the present invention do not make specific requirement to this, and those skilled in the art can be according to actual job needs
The preset ratio is rationally set.
In the above-mentioned methods, the extrusion speed, the rate of stretch and extrusion time etc. are that those skilled in the art can be with
The parameter for needing rationally to be arranged according to operation, wherein squeeze distance described in step (3)-(5) is bowing for subduction of oceanic crust system
Distance is rushed, is the product between the extrusion speed and extrusion time of subduction of oceanic crust system.
In the above-mentioned methods, it is preferable that the theory relation between the underlying parameter are as follows:
gρchc+gρcuhcu+gρclhcl+gρmhcm=g ρoho+gρouhou+gρolhol+gρmhom；
In formula, hc、ρcRespectively indicate upper thickness, the density of continental crust plate；
hcu、ρcuRespectively indicate intima-media thickness, the density of continental crust plate；
hcl、ρclRespectively indicate lower thickness, the density of continental crust plate；
ho、ρoRespectively indicate upper thickness, the density of oceanic crust plate；
hou、ρouRespectively indicate intima-media thickness, the density of oceanic crust plate；
hol、ρolRespectively indicate lower thickness, the density of oceanic crust plate；
hcm、ρmNot Biao Shi asthenosphere depth, density.
In the above-mentioned methods, it is preferable that gained continental crust top sand after respectively further comprising in step (3)-(5) to simulation
Layer is sliced, then by respective gained plane result after automatic camera and 3-D scanning in the slice result and step (3)-(5)
Construct the operation of three-dimensional stereo model.
In the above-mentioned methods, it is preferable that the slice of the continental crust top sand is obtained by following manner:
After simulation, by asthenosphere (honey) after being discharged in the physical analogy analytical equipment that plate subduction is dropped back, then
It is sliced after soaking continental crust top sand with water；
Alternatively, by gained subduction of oceanic crust system, continental crust after simulation raise flushing system, asthenosphere integrally carries out it is integrally cold
Freeze, then freezing obtained solid is sliced.
It can determine that plate is bowed using the physical analogy analysis method and device of plate subduction provided by the present invention recession
The formation mechenism of punching recession and extentional basin after arc.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the physical analogy analytical equipment of plate subduction provided by the present invention recession；
Fig. 2 is that the experimental result of the physical analogy analysis method of the recession of plate subduction provided by the embodiment of the present invention develops
Figure.
Main Reference label declaration:
1: the first drive motor；2: the second drive motors；3: the first force baffles；4: the second force baffles；5: honey；6:
Oceanic crust lower part layer of silica gel；7: layer of silica gel in the middle part of oceanic crust；8: oceanic crust top sand；9: continental crust lower part layer of silica gel；10: silicon in the middle part of continental crust
Glue-line；11: continental crust top sand；12: aperture.
Specific embodiment
In order to which technical characteristic of the invention, purpose and beneficial effect are more clearly understood, now in conjunction in detail below
Embodiment carries out following detailed description to technical solution of the present invention, but should not be understood as the limit to enforceable range of the invention
It is fixed.
Embodiment 1
Present embodiments provide a kind of physical analogy analytical equipment of plate subduction recession, structural schematic diagram such as Fig. 1 institute
Show, from figure 1 it appears that the device is cuboid comprising: subduction of oceanic crust system, continental crust are raised flushing system, asthenosphere and are moved
Power-driven system；
The subduction of oceanic crust system successively includes oceanic crust lower part layer of silica gel 6, oceanic crust middle part layer of silica gel 7 and oceanic crust from bottom to top
Top sand 8；
It successively includes continental crust lower part layer of silica gel 9, continental crust middle part layer of silica gel 10 and land that the continental crust raises flushing system from bottom to top
Shell top sand 11；
The power-driven system is applied including the first drive motor 1, first force baffle 3, the second drive motor 2 and second
Power baffle 4；
The asthenosphere is honey 5, is located at the bottom of the groove body；
It is described first force baffle, second force baffle be located inside the groove body, respectively with two opposite sides of the groove body
Face is parallel, and the bottom surface of the first force baffle, the second force baffle is just contacted with honey top surface respectively；First driving
The screw that motor and the second drive motor penetrate two opposite flanks of groove body by two respectively with the first force baffle, the
Two force baffles are connected, so that the first force baffle, the second force baffle move back and forth；
The subduction of oceanic crust system and continental crust are raised flushing system and are located inside the groove body, apply between the first force baffle, second
Between power baffle, each layer of correspondence that the subduction of oceanic crust system and continental crust raise flushing system is contacted with each other and is corresponded at the upper plane of each layer
In same level, wherein oceanic crust lower part layer of silica gel, continental crust lower part layer of silica gel are layed on honey, in the middle part of the oceanic crust
Layer of silica gel, layer of silica gel is located at oceanic crust lower part layer of silica gel, on the layer of silica gel of continental crust lower part in the middle part of continental crust, oceanic crust top sand
Layer, continental crust top sand are located at layer of silica gel in the middle part of oceanic crust, on the layer of silica gel of continental crust middle part.
The groove body side bottom is provided with aperture 12, and port lid (not shown) is equipped with outside aperture.
The color of the oceanic crust top sand and continental crust top sand is different.
Embodiment 2
The physical analogy analysis method for present embodiments providing a kind of plate subduction recession, is mentioned using embodiment 1
What the device of confession was realized, wherein this method specifically includes the following steps:
Step 201: obtaining the underlying parameter that institute's target plate subduction to be simulated is dropped back, the underlying parameter includes continental crust
Lift height, density, the viscosity of plate, lift height, density, the viscosity of oceanic crust plate, the depth of asthenosphere, density, viscosity.
According to the hierarchical attribute feature of continental crust plate, oceanic crust plate, asthenosphere, obtained using simulation material principle of similarity
Experimental model material and property parameters.
Continental crust top sand selects white natural siliceous sand to do simulation material, thickness, density be respectively set to 0.007m,
1300kg/m3, internal friction angle is 31 °；
Thickness, density, the viscosity of layer of silica gel are respectively 0.017m, 1300kg/m in the middle part of continental crust3、3×104Pas；
Continental crust lower part layer of silica gel thickness, density, viscosity are set to 0.003m, 1350kg/m3、1×105Pas；
Oceanic crust top sand selects white natural siliceous sand to do simulation material, thickness, density be respectively set to 0.003m,
1500kg/m3, internal friction angle is 31 °；
Thickness, density, the viscosity of layer of silica gel are respectively 0.006m, 1430kg/m in the middle part of oceanic crust3、1×105Pas；
Oceanic crust lower part layer of silica gel thickness, density, viscosity are set to 0.003m, 1530kg/m3、1×105Pas；
Asthenosphere selection honey does simulation material, and density and viscosity are respectively 1410kg/m3, 100Pas, the height of honey
Degree do not need to be arranged, can according to gravity balance act on and adjust automatically reaches balance.
Step 202: being based on above-mentioned underlying parameter, construct oceanic crust plate unilateral side diving model according to preset ratio.
Wherein, which can be configured in advance, and preset ratio can be 1:106, the 1cm in model is equivalent to
Actual 10km, this experimental model length specification are 70cm, 60cm, 40cm.
Step 203: the underlying parameter based on setting constructs infrastest mounted cast.
Infrastest mounted cast is constructed based on above-mentioned experimental material parameter and experimental provision specification.
Step 204: the infrastest mounted cast based on building implements the underriding experiment simulation of oceanic crust plate unilateral side
Drive the first force baffle to oceanic crust plate using the first drive motor on the right side of the infrastest model constructed
Implement extrusion stress, extrusion speed is set as 0.50cm/ hours.
Every extruding 0.50cm carries out automatic camera and 3-D scanning 1 time, observes continental crust and oceanic crust top sand surface deformation
Feature.
Be squeezed stress influence, oceanic crust plate (original length of subduction of oceanic crust system be 34cm) first along with continental crust plate
Block contact position starts to dive, and generates trench Zona transformans, the increase with oceanic crust plate to continental crust plate subduction depth, oceanic crust plate
The angle of underriding is gradually increased, and generates recession phenomenon, and the effect that plate subduction recession phenomenon generates makes continental crust that extensional deformation occur,
Depression sedimentation is formed, extentional basin after arc is finally budded into；It was surveyed using protractor at interval of 1 hour (i.e. every extruding 0.50cm)
The inclination angle of No. 1 subducting plate is measured, specifically as shown in Fig. 2, in Fig. 2, the residue length of surveyed subduction of oceanic crust system is 30cm in A,
Then its squeeze distance is 4cm, and corresponding extrusion time is 8 hours；The residue length of surveyed subduction of oceanic crust system is 28cm in B,
Its squeeze distance is 6cm, and corresponding extrusion time is 12 hours；The residue length of surveyed subduction of oceanic crust system is 25cm in C,
Squeeze distance is 9cm, and corresponding extrusion time is 18 hours；And the residue length of surveyed subduction of oceanic crust system is 22cm in D,
Squeeze distance is 12cm, and corresponding extrusion time is 24 hours；From the A-D of Fig. 2 as can be seen that as subduction of oceanic crust system is squeezed
The increase of distance is pressed, underriding angle also increases with it.
The relationship between plate subduction distance and underriding inclination angle is worked out according to measurement result to illustrate, and then analyzes subducting plate
The changing rule of recession.
Step 205: the observation of continental crust panel surface layer of sand deformation plane
Oceanic crust plate causes the continental crust top close to trench side to oceanic crust direction Yang Chong to continental crust plate subduction recession, together
When traction continental crust lower part layer of silica gel migrated to subducting plate recession direction, and then cause on continental crust lower part asthenosphere substance (honey)
It gushes, settles to form basin so as to cause continental crust top sand.Since continental crust top sand subsiding extent is smaller, shown in planar picture
Show not clear enough, by 3 D stereo scanning collection data, utilizes Move-3DSoftware can obtain clear back-arc basin development
Range.
Step 206: continental crust panel surface layer of sand deforms cut-plane slices observation
Based on step 205 experiment final result obtained, by the honey in experimental provision set by the experimental provision 12
Honey evacuation aperture slowly exclude after, with water soak layer of sand 24 hours after be sliced, 1/2cm of slice spacings.
Another method is by step 205 experiment final result entirety obtained, and slice, which is put into freezing chamber, to be frozen into
Then solid is sliced, 1/5cm of slice spacings with the mode that hacksaw is cut.
Result and plane result will be sliced in Move-3DThree-dimensional stereo model is constructed on software platform, analyzes different location structure
Make deformation behaviour.
Step 207: oceanic crust plate subduction, continental crust plate are implemented based on infrastest mounted cast constructed by step 203
Extrusion experiment simulation.
Keep step 204 set by the first drive motor drive first force baffle to oceanic crust plate jams speed not
Become, drives the second force baffle to apply extrusion stress to continental crust plate using the second drive motor on the left of simulator, squeeze
Speed is 0.25cm/ hours.
Step 204,205,206 are repeated, experiment is obtained and simulates three-dimensional result map.
In next step, change the extruding speed that the second drive motor drives the second force baffle to apply extrusion stress to continental crust plate
Degree, was increased to 0.75cm/ hours by 0.25cm/ hours, repeated step 204,205,206, is obtained experiment and is simulated three-dimensional result map.
Step 208: oceanic crust plate subduction, continental crust plate are implemented based on infrastest mounted cast constructed by step 203
Stretching, extension experiment simulation.
Keep step 204 set by the first drive motor drive first force baffle to oceanic crust plate jams speed not
Become, drives the second force baffle to apply stretching, extension stress, stretching, extension to continental crust plate using the second drive motor on the left of simulator
Speed is 0.25cm/ hours.
Step 204,205,206 are repeated, experiment is obtained and simulates three-dimensional result map.
Step 209: experimental result comparative analysis obtains extentional basin origin cause of formation Dominated Factors after plate subduction recession arc.
Three-dimensional result map is simulated based on step 206,207,208 experiments obtained, comparative analysis plate subduction recession
Fault development degree after angle change rule, back-arc basin subsiding extent variation tendency, arc, and then comprehensive analysis back-arc basin is sent out
The favorable factor educated.
From comparative analysis result as can be seen that when continental crust plate jams speed is less than oceanic crust plate subduction speed, land
Shell top sand generates extentional basin after arc；When continental crust plate jams speed is greater than oceanic crust plate subduction speed, continental crust top
Layer of sand generates retroarc foreland basin.Oceanic crust plate subduction simultaneously, continental crust plate occur stretching, extension (the deformation journey of continental crust surface layer of sand
Degree increases), apparent rift type basin is generated within the scope of back-arc basin.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (8)
1. a kind of physical analogy analytical equipment of plate subduction recession, which is characterized in that the device is a groove body comprising: ocean
Shell hell system, continental crust raise flushing system, asthenosphere and power-driven system；
The subduction of oceanic crust system successively includes oceanic crust lower part layer of silica gel, oceanic crust middle part layer of silica gel and oceanic crust top sand from bottom to top
Layer；
It successively includes continental crust lower part layer of silica gel, continental crust middle part layer of silica gel and continental crust top sand that the continental crust raises flushing system from bottom to top
Layer；
The power-driven system includes the first drive motor, the first force baffle, the second drive motor and the second force baffle；
The asthenosphere is honey, is located at the bottom of the groove body；
The first force baffle, the second force baffle are located inside the groove body, flat with two opposite sides of the groove body respectively
Row, and the bottom surface of the first force baffle, the second force baffle is just contacted with honey top surface respectively；First drive motor
And second the drive motor screw that penetrates two opposite flanks of groove body by two applied respectively with the first force baffle, second
Power baffle is connected, so that the first force baffle, the second force baffle move back and forth；
The subduction of oceanic crust system and continental crust are raised flushing system and are located inside the groove body, between the first force baffle, the second force gear
Between plate, each layer of correspondence that the subduction of oceanic crust system and continental crust raise flushing system, which contacts with each other and corresponds to the upper plane of each layer, is in same
One horizontal plane, wherein oceanic crust lower part layer of silica gel, continental crust lower part layer of silica gel are layed on honey, silica gel in the middle part of the oceanic crust
Layer, layer of silica gel is located at oceanic crust lower part layer of silica gel, on the layer of silica gel of continental crust lower part in the middle part of continental crust, the oceanic crust top sand,
Continental crust top sand is located at layer of silica gel in the middle part of oceanic crust, on the layer of silica gel of continental crust middle part.
2. the apparatus according to claim 1, which is characterized in that the groove body is cuboid.
3. the apparatus according to claim 1, which is characterized in that the groove body side bottom is provided with aperture, and outside aperture
Port lid is installed.
4. device according to claim 1-3, which is characterized in that the oceanic crust top sand and continental crust top sand
The color of layer is different.
5. a kind of physical analogy analysis method of plate subduction recession, which is characterized in that this method is appointed using claim 1-4
What the physical analogy analytical equipment of the recession of plate subduction described in one was realized comprising following steps:
(1) theory relation between the underlying parameter and the underlying parameter that institute's target plate subduction to be simulated is dropped back is obtained,
Wherein, the underlying parameter includes lift height, density, the viscosity of continental crust plate, and the lift height of oceanic crust plate, sticks density
Degree, the depth of asthenosphere, density, viscosity；
(2) according to the hierarchical attribute feature of continental crust plate, oceanic crust plate and asthenosphere, continental crust plate, oceanic crust plate and soft are selected
Flow the simulation material of circle；And the theory relation according to step (1) between underlying parameter and the underlying parameter and default
The property parameters of those simulation materials are respectively set in ratio, further according to selected simulation material and the property parameters of simulation material
Construct the physical analogy analytical equipment of the plate subduction recession；
(3) implement the underriding simulation of oceanic crust plate unilateral side: extrusion stress being implemented to subduction of oceanic crust system with certain extrusion speed, is squeezed
Pressure carries out an automatic camera and a 3-D scanning after a certain period of time, to observe the deformation behaviour on continental crust top sand surface；
The underriding inclination angle of a subduction of oceanic crust system is measured simultaneously, and determines the relationship between squeeze distance and underriding inclination angle to analyze ocean
The changing rule of shell hell system recession；
(4) implement oceanic crust plate subduction, the simulation of continental crust plate jams: to bow with identical extrusion speed in step (3) to oceanic crust
Flushing system implements extrusion stress, meanwhile, flushing system is raised to continental crust respectively with different extrusion speeds and implements extrusion stress, squeezes one
An automatic camera and a 3-D scanning are carried out after fixing time, to observe the deformation behaviour on continental crust top sand surface；Simultaneously
The underriding inclination angle of a subduction of oceanic crust system is measured, and determines that the relationship between squeeze distance and underriding inclination angle is bowed to analyze oceanic crust
The changing rule of flushing system recession；
(5) implement oceanic crust plate subduction, the stretching, extension simulation of continental crust plate: to bow with identical extrusion speed in step (3) to oceanic crust
Flushing system implements extrusion stress, meanwhile, flushing system is raised to continental crust respectively with certain rate of stretch and implements stretching, extension stress, a timing
Between after carry out an automatic camera and a 3-D scanning, to observe the deformation behaviour on continental crust top sand surface；It measures simultaneously
The underriding inclination angle of subduction of oceanic crust system, and determine the relationship between squeeze distance and underriding inclination angle to analyze subduction of oceanic crust system
The changing rule of system recession；
(6) deformation behaviour and squeeze distance on the continental crust top sand surface according to obtained in step (3)-(5) and underriding inclination angle
Between relationship determine the formation mechenism of extentional basin after plate subduction recession and arc.
6. the physical analogy analysis method of plate subduction recession according to claim 5, which is characterized in that the basis ginseng
Theory relation between number are as follows:
gρchc+gρcuhcu+gρclhcl+gρmhcm=g ρoho+gρouhou+gρolhol+gρmhom；
In formula, hc、ρcRespectively indicate upper thickness, the density of continental crust plate；
hcu、ρcuRespectively indicate intima-media thickness, the density of continental crust plate；
hcl、ρclRespectively indicate lower thickness, the density of continental crust plate；
ho、ρoRespectively indicate upper thickness, the density of oceanic crust plate；
hou、ρouRespectively indicate intima-media thickness, the density of oceanic crust plate；
hol、ρolRespectively indicate lower thickness, the density of oceanic crust plate；
hcm、ρmRespectively indicate depth, the density of asthenosphere.
7. the physical analogy analysis method of plate subduction recession according to claim 5, which is characterized in that step (3)-
(5) gained continental crust top sand is sliced after respectively further comprising in simulation, then by the slice result and step (3)-
(5) in after respective automatic camera and 3-D scanning gained plane result building three-dimensional stereo model operation.
8. the physical analogy analysis method of plate subduction recession according to claim 7, which is characterized in that in the continental crust
The slice of portion's layer of sand is obtained by following manner:
After simulation, by honey from the physical analogy analytical equipment that plate subduction is dropped back be discharged after, then with water soak continental crust
It is sliced after top sand；
Alternatively, gained subduction of oceanic crust system, continental crust after simulation, which are raised flushing system, asthenosphere, integrally carries out whole freezing, then
Freezing obtained solid is sliced.
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