CN109829191A - The system and method for the thermokinematics that Tectonic-thermal evolution restores - Google Patents
The system and method for the thermokinematics that Tectonic-thermal evolution restores Download PDFInfo
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Abstract
The embodiment of the present invention provides a kind of system and method for thermokinematics that Tectonic-thermal evolution restores, and belongs to tectonic geology studying technological domain.By carrying out physical analogy and discrete element numerical simulation to research area, obtain optimal forward modeling tectonic history, and hot chronology simulation is carried out to hot chronology sample and obtains inverting tectonic history, finally carry out the couple solution of optimal forward modeling tectonic history and inverting tectonic history, obtain Tectonic-thermal evolution, by single method tectonic evolution pattern, there are certain defects compared with the prior art, the present invention is by carrying out couple solution to two methods of forward modeling and inverting, not only the defect of single method had been overcome, but also accurate tectonic evolution pattern can be obtained.
Description
Technical field
The present invention relates to tectonic geology studying technological domain, the heat restored more particularly to a kind of Tectonic-thermal evolution is transported
The dynamic system and method learned.
Background technique
Structural evolution refers to that the forming process constructed from time angle analysis and changing rule, i.e. tectonic kinematics are studied.
The research method of tectonic evolution pattern may be summarized to be forward modeling and inverting two major classes, in the majority with inversion method.Wherein, structural physical mould
It fits numerical simulation and belongs to forward modeling method, and thermal-chronological dating and balanced cross section belong to inversion method.These methods all have
Certain applicability and advantage and disadvantage, such as:
Physical analogy: theoretical system is complete, visualization is high, is suitable for almost the recovery of various structural types, is most
Common forward modeling method, but during structural deformation, it is difficult the motion profile and mechanics parameter of particle in record cast.
Numerical simulation: digitlization can be solved the problems, such as very well, but common finite difference or finite element modelling are will to count
Value model net is formatted, different in the presence of essence in thinking and algorithm using granular materials simulation deformation from structural physical simulation, and
And the deformation effect that simulation obtains also can not show a candle to physical analogy.Although another discrete element numerical simulation on modeling approach with structure
Make that physical analogy is identical, but existing mechanics parameter is only limitted to the constructing analog of km scale, lacks identical as physical analogy
Laboratory scale (meter level) parameter set.
Hot chronology: this method quantitative effect is good, and principle is to reflect tectonic history indirectly by recovery temperature history, but influence
The factor of temperature does not only have tectonic subsidence or lifting, also includes the non-structural factors such as basin cooling, and in refutation process
Need to provide detailed geological constraining, this is in complex deformation area than relatively difficult to achieve.
Balanced cross section: this method is that structural evolution restores a kind of common inversion method, its advantage be it is easy to operate and
It is high-efficient, but balanced section technique restoration errors are bigger (20%-30%), and are not particularly suited for strike-slip fault zone recovery.
Therefore, individually may exist and cannot construct using the research that a kind of above-mentioned method carries out tectonic evolution pattern
The defects of parameter or inaccurate result in the process.
Summary of the invention
The purpose of the embodiment of the present invention is that a kind of system and method for thermokinematics that Tectonic-thermal evolution restores is provided,
By carrying out couple solution to optimal forward modeling tectonic history and inverting tectonic history, Tectonic-thermal evolution is obtained.
To achieve the goals above, what the embodiment of the present invention provided the thermokinematics that a kind of Tectonic-thermal evolution restores is
System, which includes: forward modeling module, which includes: physical model and discrete element numerical model, is respectively used to carry out research area
Physical analogy and discrete element numerical simulation obtain optimal forward modeling tectonic history；Inverting module, the module carry out hot chronology sample mould
It is quasi-, obtain inverting tectonic history；And processing output module, the module are used to construct the optimal forward modeling tectonic history and the inverting
History carries out couple solution, obtains Tectonic-thermal evolution.
Optionally, the forward modeling module is also used to geological structure parsing and Evolutionary History analysis result according to the research area
Establish geological model；The physical model and discrete element numerical model are established according to the geological model；
Optionally, the optimal forward modeling tectonic history is joined by adjusting the discrete element granular mechanics of the discrete element numerical model
Number, the object for making the numerical simulation result of the geologic section deformation behaviour in the research area and being simulated by the physical model
Reason analog result approaches to obtain in same scale.
Optionally, the inverting module is also used to corresponding with the hot chronology sample in the discrete element numerical model
The particle motion trajectory of construction location is modified the input parameter of the inverting module as inverting geological constraining.
Optionally, the input parameter of the inverting module is paleogeothermal gradient.
Optionally, the processing output module is also used to output construction-thermal evolution history in the form of balanced cross section.
Correspondingly, a kind of method of the thermokinematics restored the present invention also provides Tectonic-thermal evolution, this method comprises:
Research area's physical analogy and discrete element numerical simulation are carried out, optimal tectonic evolution pattern is obtained；Hot chronology sample simulation is carried out,
Obtain inverting tectonic history；And couple solution is carried out to the optimal forward modeling tectonic history and the inverting tectonic history, obtain construction-heat
Evolutionary History.
Optionally, the optimal forward modeling tectonic history in the discrete element numerical simulation by adjusting discrete element granular mechanics
Parameter, the physics for making the numerical simulation result of the geologic section deformation behaviour in the research area and being obtained by the physical analogy
Analog result approaches to obtain in same scale.
Optionally, this method further include: constructed with corresponding with the hot chronology sample in the discrete element numerical simulation
The particle motion trajectory of position is modified the input parameter of the hot chronology sample simulation as inverting geological constraining；
The input parameter of the hot chronology sample simulation is paleogeothermal gradient.
Optionally, the Tectonic-thermal evolution is exported in the form of balanced cross section.
Through the above technical solutions, the present invention is obtained by carrying out physical analogy and discrete element numerical simulation to research area
Optimal forward modeling tectonic history, and hot chronology simulation is carried out to hot chronology sample and obtains inverting tectonic history, it finally carries out optimal
The couple solution of forward modeling tectonic history and inverting tectonic history obtains Tectonic-thermal evolution, passes through single method compared with the prior art
There are certain defect, the present invention both to overcome list by carrying out couple solution to two methods of forward modeling and inverting for tectonic evolution pattern
The defect of one method, and accurate tectonic evolution pattern can be obtained.
The other feature and advantage of the embodiment of the present invention will the following detailed description will be given in the detailed implementation section.
Detailed description of the invention
Attached drawing is to further understand for providing to the embodiment of the present invention, and constitute part of specification, under
The specific embodiment in face is used to explain the present invention embodiment together, but does not constitute the limitation to the embodiment of the present invention.Attached
In figure:
Fig. 1 is the signal of the system for the thermokinematics that a kind of Tectonic-thermal evolution that one embodiment of the invention provides restores
Figure.
Fig. 2 be another embodiment of the present invention provides a kind of system of thermokinematics restored of Tectonic-thermal evolution show
It is intended to.
Fig. 3 is the process of the method for the thermokinematics that a kind of Tectonic-thermal evolution that one embodiment of the invention provides restores
Figure.
Specific embodiment
It is described in detail below in conjunction with specific embodiment of the attached drawing to the embodiment of the present invention.It should be understood that this
Locate described specific embodiment and be merely to illustrate and explain the present invention embodiment, is not intended to restrict the invention embodiment.
Fig. 1 is the signal of the system for the thermokinematics that a kind of Tectonic-thermal evolution that one embodiment of the invention provides restores
Figure, which includes: forward modeling module, which includes: physical model and discrete element numerical model, is respectively used to carry out research area
Physical analogy and discrete element numerical simulation obtain optimal forward modeling tectonic history；Inverting module, the module carry out hot chronology sample mould
It is quasi-, obtain inverting tectonic history；Output module is handled, for carrying out couple solution to optimal forward modeling tectonic history and inverting tectonic history,
Obtain Tectonic-thermal evolution.
Fig. 2 be another embodiment of the present invention provides a kind of system of thermokinematics restored of Tectonic-thermal evolution show
It is intended to, which includes: geological model, for providing research area's geological information；Forward modeling module, the module include: physical model
With discrete element numerical model, it is respectively used to carry out research area's physical analogy and discrete element according to the geological information that geological model provides
Numerical simulation obtains optimal forward modeling tectonic history；Inverting module, the module carry out hot chronology sample simulation, obtain inverting construction
History；Output module is handled, for carrying out couple solution to optimal forward modeling tectonic history and inverting tectonic history, obtains Tectono-thermal
History.
Specifically, the parsing of research area's geological structure can be carried out using existing geologic information and geophysical information and developed
History analysis, to determine the mechanical properties of rock of Different Strata, correspondence marks off rigidity and moulding stratum, to establish Geological Model
Type.Then according to the geological model of foundation, physical model is on the one hand established, uses the materials such as quartz sand, bead and silicone resin
Physical model is established, realizes the simulation of laboratory scale (meter level)；On the other hand, input discrete element granular mechanics parameter construct from
Dissipate member numerical model.
Discrete element numerical simulation structural physical simulation on modeling approach is identical, but due to existing discrete element granular mechanics
Parameter is only limitted to the constructing analog of km scale, therefore adjusts the discrete element granular mechanics parameter of discrete element numerical model, makes to grind
The numerical simulation result of the geologic section deformation behaviour in area is studied carefully with the results of Physical simulated by physical model same
One scale approaches, to obtain the discrete element numerical model with physical model same scale (meter level).
In summary physical model and the analog result with the discrete element numerical model of physical model same scale, Ji Nengshi
The high level visualization now simulated, but can in record cast particle motion profile and mechanics parameter, it is excellent to embody two kinds of models
The complementation of disadvantage.
It is appreciated that should be with reality according to the physical model of geology model foundation and the analog result of discrete element numerical model
The deformation behaviour of geologic section is approached, therefore during carrying out physical analogy and discrete element numerical simulation, can be tied according to simulation
Fruit deepens geological knowledge, correspondingly adjusts geological model, physical model and discrete element numerical model, reaches preferably simulation effect
Fruit finally obtains optimal forward modeling tectonic history, and corresponding discrete element granular mechanics parameter set is and structural physical simulation ruler at this time
Spend (meter level) identical discrete element granular mechanics parameter set, wherein discrete element granular mechanics parameter set includes rigid stratum and modeling
Two sets of stratum of property mechanics parameter, including parameter have: the bonding power of density, normal stiffness, shear stiffness, method, coefficient of internal friction
And viscosity.The set of discrete member granular mechanics parameter set applicable for the tectonic province based on the folding as shown in table 1.
1 discrete element granular mechanics parameter set of table
Inversion method applied by inverting module is thermal-chronological dating, according to the hot chronology system of practical geology profile collection
Column sample, and mark the construction location of sample, then mineral such as the apatite in screening sample and zircon, carry out fission track and
(U-Th) thermal-chronological datings such as/He, the Tectono-thermal mistake finally undergone using hot chronology simulation softward inverting sample
Journey obtains inverting tectonic history.
When carrying out the simulation of hot chronology sample, the parameter value of paleogeothermal gradient need to be inputted to obtain sample thermal history, i.e., instead
Drill tectonic history.Wherein, inverting module is moved with the particle of construction location corresponding with hot chronology sample in discrete element numerical model
Track is modified paleogeothermal gradient as inverting geological constraining.
It is appreciated that the paleogeothermal gradient of the thermal history and input that are obtained according to inverting module simulation can calculate certain a sample
The particle motion trajectory of particle extracts for being in same structure position in discrete element numerical model with hot chronology sample at this time
Grain motion profile is compared, corresponding to adjust the paleogeothermal gradient inputted in inverting module if two result gaps are obvious,
Make in particle motion trajectory and discrete element numerical model according to the calculated sample particle of paleogeothermal gradient of thermal history and input
The particle motion trajectory for being in same structure position with hot chronology sample approaches.Paleogeothermal gradient can refer to what forefathers had delivered
Paleogeothermal gradient is adjusted, if what the particle motion trajectory for being in same structure position with hot chronology sample inputted when approaching
When the paleogeothermal gradient gap that paleogeothermal gradient and forefathers have delivered is obvious, then the paleogeothermal gradient of input can be stored
Amendment, as the reference simulated later.
It is understood that in conjunction with the particle for being in same structure position in discrete element numerical model with hot chronology sample
Motion profile, inverse model can convert temperature field path for the Depth Domain path of sample, the thermal evolution carried out by the constraint
It simulates more accurate.
Handle output module can include: coupling computing module, for obtained optimal forward modeling tectonic history and inverting to be constructed
History carries out couple solution；And output module, for output construction-thermal evolution history in the form of balanced cross section.
In tectonic evolution pattern recovery process, forward modeling and inversion method needs are worked in coordination and are confirmed, to make up single method
Defect, but the united degree of the prior art is also only limitted to qualitative and non-quantitation, this can no longer meet increasingly complicated research
Demand.It is difficult to meet quantification for forward modeling and combining for inversion method, the present invention constructs one and structural physical simulation ruler
The discrete element numerical model of identical (meter level) is spent, and establishes one for structural physical simulation, discrete element numerical simulation, hot year
For the thermokinematics system of four kinds of method integrated restoration Tectono-thermal history of credit analysis and balanced cross section, structure is overcome
Reason simulation is difficult to record the defect of particle motion trace, and perfect existing discrete element numerical simulation parameter is only applicable to large scale structure
The deficiency for making analysis solves the problems, such as that thermal history simulation in complex structural area lacks kinematical constraint.
Fig. 3 is the process of the method for the thermokinematics that a kind of Tectonic-thermal evolution that one embodiment of the invention provides restores
Figure.This method comprises:
Step 301, geological model is established.
The parsing of research area's geological structure can be carried out using existing geologic information and geophysical information and Evolutionary History is analyzed,
To determine the mechanical properties of rock of Different Strata, correspondence marks off rigidity and moulding stratum, to establish geological model.
Step 302, building research area's physical model, carries out physical analogy.
Step 303, building research area's discrete element numerical model, carries out discrete element numerical simulation.
Specifically, on the one hand establishing object using materials such as quartz sand, bead and silicone resin according to the geological model of foundation
Model is managed, realizes the simulation of laboratory scale (meter level)；On the other hand, input discrete element granular mechanics parameter constructs discrete element number
It is worth model.
Step 304, judge physical analogy and discrete element numerical simulation result whether with practical geologic section deformation behaviour
It approaches, if judging result is "Yes", thens follow the steps 306, conversely, executing step 305.
Step 305, geological model is adjusted.
Specifically, the result and practical geologic section deformation behaviour difference when physical analogy and discrete element numerical simulation are very big
When, geological knowledge can be deepened according to analog result, geological model is readjusted, to adjust again according to geological model adjusted
Whole physical model and discrete element numerical model, until the analog result of physical model and discrete element numerical model and practical geology are cutd open
Face deformation behaviour is approached, and realizes preferably simulation effect.
Step 306, judge study area geologic section deformation behaviour numerical simulation result whether with pass through physical model
It simulates obtained results of Physical to approach in same scale, if judging result is "Yes", thens follow the steps 308 and step 309,
Conversely, executing step 307.
Step 307, discrete element granular mechanics parameter is adjusted.
Specifically, discrete element numerical simulation structural physical simulation on modeling approach is identical, but due to existing discrete element
Granular mechanics parameter is only limitted to the constructing analog of km scale, therefore adjusts the discrete element granular mechanics ginseng of discrete element numerical model
Number makes the numerical simulation knot for studying the geologic section deformation behaviour in area while meeting the deformation behaviour of actual ground section
Fruit approaches with the results of Physical simulated by physical model in same scale, to obtain and physical model same scale
The discrete element numerical model of (meter level).
In summary physical model and the analog result with the discrete element numerical model of physical model same scale, Ji Nengshi
The high level visualization now simulated, but can in record cast particle motion profile and mechanics parameter, it is excellent to embody two kinds of models
The complementation of disadvantage.
Step 308, hot chronology series of samples, marker configurations position are acquired.
Step 309, thermal-chronological dating is carried out.
Specifically, according to the hot chronology series of samples of practical geology profile collection, and the construction location of sample is marked, then
The mineral such as apatite and zircon in screening sample carry out the thermal-chronological datings such as fission track and (U-Th)/He.
Step 310, hot chronology sample simulation is carried out.
Specifically, the parameter value of paleogeothermal gradient need to be inputted when carrying out the simulation of hot chronology sample to obtain sample heat
History, i.e. inverting tectonic history.Wherein, when being simulated, with construction position corresponding with hot chronology sample in discrete element numerical simulation
The particle motion trajectory set is modified paleogeothermal gradient as inverting geological constraining.
It is appreciated that the paleogeothermal gradient for the thermal history and input simulated according to hot chronology sample can calculate it is a certain
The particle motion trajectory of sample particle extracts discrete element numerical simulation at this time and is in same structure with hot chronology sample in the process
The particle motion trajectory of position is compared, if two result gaps are obvious, the paleogeothermal gradient of corresponding adjustment input makes
According in the particle motion trajectory of the calculated sample particle of the paleogeothermal gradient of thermal history and input and discrete element numerical model with
The particle motion trajectory that hot chronology sample is in same structure position approaches.Paleogeothermal gradient can refer to the Gu that forefathers have delivered
Geothermal gradient is adjusted, if the Gu that the particle motion trajectory for being in same structure position with hot chronology sample inputs when approaching
When the paleogeothermal gradient gap that geothermal gradient and forefathers have delivered is obvious, then the paleogeothermal gradient of input can be carried out to storage and repaired
Just, as the reference simulated later.
Step 312, optimal forward modeling tectonic history is obtained.
Step 313, inverting tectonic history is obtained.
Step 314, coupling calculating is carried out to optimal forward modeling tectonic history and inverting tectonic history, obtains the construction-heat in research area
Evolutionary History.
Step 315, the Tectonic-thermal evolution for studying area is exported in the form of balanced cross section.
The optional embodiment of the embodiment of the present invention is described in detail in conjunction with attached drawing above, still, the embodiment of the present invention is simultaneously
The detail being not limited in above embodiment can be to of the invention real in the range of the technology design of the embodiment of the present invention
The technical solution for applying example carries out a variety of simple variants, these simple variants belong to the protection scope of the embodiment of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case where shield, it can be combined in any appropriate way.In order to avoid unnecessary repetition, the embodiment of the present invention pair
No further explanation will be given for various combinations of possible ways.
It will be appreciated by those skilled in the art that implementing the method for the above embodiments is that can pass through
Program is completed to instruct relevant hardware, which is stored in a storage medium, including some instructions are used so that single
Piece machine, chip or processor (processor) execute all or part of the steps of each embodiment the method for the application.And it is preceding
The storage medium stated includes: USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory
The various media that can store program code such as (RAM, Random Access Memory), magnetic or disk.
In addition, any combination can also be carried out between a variety of different embodiments of the embodiment of the present invention, as long as it is not
The thought of the embodiment of the present invention is violated, equally should be considered as disclosure of that of the embodiment of the present invention.
Claims (10)
1. a kind of system for the thermokinematics that Tectonic-thermal evolution restores, which is characterized in that the system includes:
Forward modeling module, comprising:
Physical model and discrete element numerical model are respectively used to carry out research area's physical analogy and discrete element numerical simulation, obtain
Optimal forward modeling tectonic history；
Inverting module obtains inverting tectonic history for carrying out hot chronology sample simulation；And
Output module is handled, for carrying out couple solution to the optimal forward modeling tectonic history and the inverting tectonic history, obtains structure
Make-thermal evolution history.
2. system according to claim 1, which is characterized in that the forward modeling module is also used to the ground according to the research area
Matter tectonic knot and Evolutionary History analysis result establish geological model,
The physical model and discrete element numerical model are established according to the geological model.
3. system according to claim 1, which is characterized in that the optimal forward modeling tectonic history is by adjusting the discrete element
The discrete element granular mechanics parameter of numerical model makes the numerical simulation result of the geologic section deformation behaviour in the research area and leads to
The results of Physical that the physical model is simulated is crossed to approach to obtain in same scale.
4. system according to claim 1, which is characterized in that the inverting module is also used to the discrete element Numerical-Mode
The particle motion trajectory of construction location corresponding with the hot chronology sample is as inverting geological constraining in type, to the inverting mould
The input parameter of block is modified.
5. system according to claim 4, which is characterized in that the input parameter of the inverting module is paleogeothermal gradient.
6. system according to claim 1, which is characterized in that the processing output module is also used to the shape with balanced cross section
Formula output construction-thermal evolution history.
7. a kind of method for the thermokinematics that Tectonic-thermal evolution restores, which is characterized in that this method comprises:
Research area's physical analogy and discrete element numerical simulation are carried out, optimal tectonic evolution pattern is obtained；
Hot chronology sample simulation is carried out, inverting tectonic history is obtained；And
Couple solution is carried out to the optimal forward modeling tectonic history and the inverting tectonic history, obtains Tectonic-thermal evolution.
8. the method according to the description of claim 7 is characterized in that the optimal forward modeling tectonic history passes through in the discrete element number
Value simulation in adjust discrete element granular mechanics parameter, make it is described research area geologic section deformation behaviour numerical simulation result with
The results of Physical obtained by the physical analogy approaches to obtain in same scale.
9. the method according to the description of claim 7 is characterized in that this method further include:
The particle motion trajectory of construction location corresponding with the hot chronology sample is as anti-using in the discrete element numerical simulation
Geological constraining is drilled, the input parameter of the hot chronology sample simulation is modified；
The input parameter of the hot chronology sample simulation is paleogeothermal gradient.
10. the method according to the description of claim 7 is characterized in that the Tectonic-thermal evolution is defeated in the form of balanced cross section
Out.
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