CN109752767A - A kind of hydrothermal-type uranium deposit geophysics field source Boundary Recognition method - Google Patents
A kind of hydrothermal-type uranium deposit geophysics field source Boundary Recognition method Download PDFInfo
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- CN109752767A CN109752767A CN201811517204.7A CN201811517204A CN109752767A CN 109752767 A CN109752767 A CN 109752767A CN 201811517204 A CN201811517204 A CN 201811517204A CN 109752767 A CN109752767 A CN 109752767A
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Abstract
The invention belongs to hydrothermal-type uranium deposit magnetic data processing fields, and in particular to a kind of hydrothermal-type uranium deposit geophysics field source Boundary Recognition method.The present invention is the following steps are included: step 1, earth's surface magnetic anomalies gridding processing, all measuring point accurate coordinates of RTK measurement, elevation information；Step 2 is handled for magnetic anomalies grid progress pole；Step 3 seeks total level directional derivative to magnetic anomaly normalizing polar net lattice；Step 4 is filtered the total level directional derivative grid that step 3 obtains using the peaceful smoothing filter of the Chinese；Step 5 compares nodes all in step 4 grid and its week boundary values；Step 6 projects to all peak values in step 5 in database in the obtained magnetic anomaly △ Tization polar net trrellis diagram of cloth rapid five, and field source boundary is then shown in figure.The present invention can effectively, truly Underground uranium source rock body or geophysics field source body boundary position form and range.
Description
Technical field
The invention belongs to hydrothermal-type uranium deposit magnetic data processing fields, and in particular to a kind of hydrothermal-type uranium deposit earth object
Manage field source Boundary Recognition method.
Background technique
Hydrothermal-type uranium deposit refers to hydrothermal solution containing mine under certain physical and chemical condition, in various advantageous constructions and rock mass
In, the valuable mineral accumulation body that is formed by patterns of metallogeny such as filling, explanation and depositions.Including granite type and volcanic type U-ore
Bed, it is China's key industry type.Uranium ore output position is generally on the inside of rock mass or outer contacting band.Therefore, uranium source rock
The information such as body or geophysics field source body boundary position form, range size, planar distribution feature are particularly important, rock mass side
Boundary and outer contacting band or great fracture have important ore-prospecting meaning to the control of rock mass inside, peripheral mineralization.
Due to being influenced by many factors such as oblique magnetization, the superposition of underground field source buried depth, scale, magnetic anomaly and noises,
Directly the detection at field source edge is carried out based on earth's surface magnetic anomaly and identification is the difficult point to work at present.And in hydrothermal-type uranium deposit
It is previous there is no specific method or not explicitly based on magnetic anomalies progress earth object in geophysical exploration appraisal
The method flow for managing field source Boundary Recognition directly affects hydrothermal-type uranium deposit research and appraisal effect, therefore it is urgent to provide a kind of new
The method on the identification geophysics field source boundary of type.
Summary of the invention
The technical problem to be solved in the present invention: the present invention provides a kind of hydrothermal-type uranium deposit geophysics field source Boundary Recognition
Method, can effectively, truly Underground uranium source rock body or geophysics field source body boundary position form and range.
The technical solution adopted by the present invention:
A kind of hydrothermal-type uranium deposit geophysics field source Boundary Recognition method, successively the following steps are included: step 1, earth's surface
Magnetic anomalies gridding processing, RTK measure all measuring point accurate coordinates, elevation information；Step 2, for magnetic anomalies grid into
The processing of rowization pole；Step 3 seeks total level directional derivative to magnetic anomaly normalizing polar net lattice；Step 4 utilizes the peaceful smoothing filter of the Chinese
The total level directional derivative grid that step 3 obtains is filtered, the superficial part information of short arc, the series of the peaceful filter of the Chinese are suppressed
It is set as 0；Step 5 compares nodes all in step 4 grid and its week boundary values, and peak detection rank is chosen to be 3 grades,
Peak value is selected, then peak extractions all in grid are come out and are put into database；Step 6, will be all in database in step 5
Peak value project in the obtained magnetic anomaly △ Tization polar net trrellis diagram of cloth rapid five, field source boundary is then shown in figure.
The step 1 includes the following steps: step 1.1, is reconnoitring area's development High-accuracy ground magnetic survey, obtains magnetic survey
Data, in order to reach better effect, magnetic survey overall accuracy should be higher than that 2nT, surveys area and is selected in the flat region of landform；Step 1.2,
It reconnoitres area and carries out RTK measurement, obtain the accurate latitude and longitude coordinates of measuring point and altitude data；Step 1.3, the magnetic that step 1.1 is obtained
Measured data carries out diurnal correction, the correction of normal field gradient, altitude correction and base correction, measuring point exception △ T value is obtained, to magnetic
When abnormal data carries out diurnal correction, fundamental magnetic field of the earth parameter need to be searched, this is calculated by the humorous model of ball and reconnoitres area's background
Field strength values, magnetic dip angle and magnetic declination；Step 1.4, magnetic anomaly △ T value resulting to step 1.3 carry out data smoothing processing,
High-frequency Interference is eliminated, smooth magnetic anomaly curve is obtained and the magnetic anomaly △ T value after all smooth treatments is carried out at gridding
Reason, is similarly formed 401 × 402 magnetic anomaly △ T grid file, the preferred minimum-curvature method of gridding difference approach.
The specific steps of the step 2 are as follows: the 1.4 obtained grid data progress pole magnetic anomaly △ T processing rapid to cloth,
Magnetic dip angle needed for changing pole processing, magnetic declination are obtained by step 1.3, form 401 × 402 magnetic anomaly normalizing polar net lattice file,
The preferred minimum-curvature method of gridding difference approach.
The specific steps of the step 3 are as follows: 2 obtained magnetic anomaly △ Tization rapid to cloth pole grid data seeks total level
Directional derivative is sought total level directional derivative method and is calculated using formula (1):
THD indicates to calculate the magnetic anomaly total level directional derivative of point in formula, and Δ T is magnetic anomaly.
In the step 5, all boundary values are referred to: X-direction, Y-direction and two diagonal values；3 grades refer to: nodal value ratio
3 direction value height of surrounding.
In the step 6, geophysics field source boundary is drawn, puts on colour code to peak value, the symbol of drafting passes through long axis side
It is shown to by edge trend, these symbols will track geology contact band boundary.
When projecting to peak value in the total level derivative figure that step 3 obtains, these symbols will track localized variation.
The beneficial technical effect of the present invention lies in: after utilizing technical solution of the present invention, to hydrothermal-type uranium deposit geophysics
Field source boundary has carried out feature identification, effectively has rated the regularity of distribution of subsurface geophysical field source body；To reach quickly,
Mesothermal gold deposits resource is accurately evaluated, there is important practical significance to Exploration.
Detailed description of the invention
Fig. 1 is a kind of hydrothermal-type uranium deposit geophysics field source Boundary Recognition method flow diagram provided by the present invention.
Specific embodiment
Invention is further described in detail with reference to the accompanying drawings and examples.
As shown in Figure 1, a kind of hydrothermal-type uranium deposit geophysics field source Boundary Recognition method provided by the invention, is successively wrapped
Include following steps:
Step 1, earth's surface magnetic anomalies gridding processing, RTK measure all measuring point accurate coordinates, elevation information；
Step 1.1 is reconnoitring area's development High-accuracy ground magnetic survey, magnetic data is obtained, in order to reach better effect
Fruit, magnetic survey overall accuracy should be higher than that 2nT, survey area and are selected in the flat region of landform；
Step 1.2 is reconnoitring area's development RTK measurement (real time kinematic survey system), obtains the accurate latitude and longitude coordinates of measuring point
And altitude data；
Step 1.3, to step 1.1 obtain magnetic data carry out diurnal correction, normal field gradient correction, altitude correction and
Base correction obtains measuring point exception △ T value, when carrying out diurnal correction to magnetic anomaly regular data, need to search fundamental magnetic field of the earth ginseng
Number, calculates this by the humorous model of ball and reconnoitres area's background magnetic field intensity value, magnetic dip angle and magnetic declination；
Step 1.4, magnetic anomaly △ T value resulting to step 1.3 carry out data smoothing processing, eliminate High-frequency Interference, obtain
Smooth magnetic anomaly curve simultaneously carries out gridding processing to the magnetic anomaly △ T value after all smooth treatments, it is similarly formed 401 ×
402 magnetic anomaly △ T grid file, the preferred minimum-curvature method of gridding difference approach；
Step 2 is handled for magnetic anomalies grid progress pole；
The 1.4 obtained grid data progress pole magnetic anomaly △ T processing rapid to cloth, magnetic dip angle needed for changing pole processing,
Magnetic declination is obtained by step 1.3, forms 401 × 402 magnetic anomaly normalizing polar net lattice file, and gridding difference approach is preferably minimum
Curvature method；
Step 3 seeks total level directional derivative to magnetic anomaly normalizing polar net lattice；
2 obtained magnetic anomaly △ Tization rapid to cloth pole grid data seeks total level directional derivative, seeks total level direction
Derivative method is calculated using formula (1):
THD indicates to calculate the magnetic anomaly total level directional derivative of point in formula, and Δ T is magnetic anomaly.
Step 4 is filtered the total level directional derivative grid that step 3 obtains using the peaceful smoothing filter of the Chinese, compacting
The series of the superficial part information of short arc, the peaceful filter of the Chinese is set as 0；
Step 5, nodes all in step 4 grid and its week boundary values are compared (X-direction, Y-direction and two it is diagonal
Value), peak detection rank is chosen to be 3 grades (i.e. nodal value is higher than 3 direction value of surrounding), selects peak value, then by institute in grid
There is peak extraction to come out and is put into database；
All peak values in step 5 in database are projected to the obtained magnetic anomaly △ Tization pole of cloth rapid five by step 6
On grid chart, field source boundary is then shown in figure.Geophysics field source boundary is drawn, puts on colour code, the symbol of drafting to peak value
Edge (geology contact relation) trend is shown by long axis direction, these symbols will track geology contact band boundary.When
When peak value being projected in the total level derivative figure that step 3 obtains, these symbols will track localized variation.
Claims (7)
1. a kind of hydrothermal-type uranium deposit geophysics field source Boundary Recognition method, it is characterised in that: successively the following steps are included: step
Suddenly (1), earth's surface magnetic anomalies gridding processing, RTK measure all measuring point accurate coordinates, elevation information；Step (2) is directed to magnetic
The processing of power pixilated grid progress pole；Step (3) seeks total level directional derivative to magnetic anomaly normalizing polar net lattice；Step (4), benefit
The total level directional derivative grid that step (3) obtains is filtered with the Chinese peaceful smoothing filter, suppresses the superficial part letter of short arc
Breath, the series of the peaceful filter of the Chinese are set as 0；Step (5) compares all nodes and its week boundary values in step (4) grid,
Peak detection rank is chosen to be 3 grades, selects peak value, then peak extractions all in grid are come out and are put into database；Step
(6), all peak values in step (5) in database are projected in the obtained magnetic anomaly △ Tization polar net trrellis diagram of cloth rapid five,
Field source boundary is then shown in figure.
2. hydrothermal-type uranium deposit geophysics field source Boundary Recognition method according to claim 1, it is characterised in that: described
Step (1) includes the following steps: step (1.1), is reconnoitring area's development High-accuracy ground magnetic survey, obtains magnetic data, is
Reach better effect, magnetic survey overall accuracy should be higher than that 2nT, surveys area and is selected in the flat region of landform；Step (1.2) is being reconnoitred
Area carries out RTK measurement, obtains the accurate latitude and longitude coordinates of measuring point and altitude data；Step (1.3), the magnetic that step (1.1) are obtained
Measured data carries out diurnal correction, the correction of normal field gradient, altitude correction and base correction, measuring point exception △ T value is obtained, to magnetic
When abnormal data carries out diurnal correction, fundamental magnetic field of the earth parameter need to be searched, this is calculated by the humorous model of ball and reconnoitres area's background
Field strength values, magnetic dip angle and magnetic declination；Step (1.4), magnetic anomaly △ T value resulting to step (1.3) carry out data smoothing
High-frequency Interference is eliminated in processing, is obtained smooth magnetic anomaly curve and is carried out grid to the magnetic anomaly △ T value after all smooth treatments
Change processing, is similarly formed 401 × 402 magnetic anomaly △ T grid file, the preferred minimum-curvature method of gridding difference approach.
3. hydrothermal-type uranium deposit geophysics field source Boundary Recognition method according to claim 2, it is characterised in that: described
The specific steps of step (2) are as follows: pole processing is changed in (1.4) the grid data progress pole obtained magnetic anomaly △ T processing rapid to cloth
Required magnetic dip angle, magnetic declination are obtained by step (1.3), form 401 × 402 magnetic anomaly normalizing polar net lattice file, gridding
The preferred minimum-curvature method of difference approach.
4. hydrothermal-type uranium deposit geophysics field source Boundary Recognition method according to claim 3, it is characterised in that: described
The specific steps of step (3) are as follows: (2) rapid to cloth obtained magnetic anomaly △ Tization pole grid data seeks total level directional derivative,
Total level directional derivative method is sought to be calculated using formula (1):
THD indicates to calculate the magnetic anomaly total level directional derivative of point in formula, and Δ T is magnetic anomaly.
5. hydrothermal-type uranium deposit geophysics field source Boundary Recognition method according to claim 4, it is characterised in that: described
In step (5), all boundary values are referred to: X-direction, Y-direction and two diagonal values；3 grades refer to: nodal value is than 3 sides of surrounding
It is high to value.
6. hydrothermal-type uranium deposit geophysics field source Boundary Recognition method according to claim 5, it is characterised in that: described
In step (6), geophysics field source boundary is drawn, puts on colour code to peak value, the symbol of drafting is walked edge by long axis direction
To showing, these symbols will track geology contact band boundary.
7. hydrothermal-type uranium deposit geophysics field source Boundary Recognition method according to claim 6, it is characterised in that: as general
When peak value is projected in the total level derivative figure that step (3) obtains, these symbols will track localized variation.
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Cited By (1)
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| CN113933260A (en) * | 2021-09-15 | 2022-01-14 | 核工业北京地质研究院 | Identification method of hydrothermal uranium deposit fluid activity center |
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