CN111090129A - Fast searching method for ore control structure of hard rock type uranium ore based on multi-source data fusion - Google Patents
Fast searching method for ore control structure of hard rock type uranium ore based on multi-source data fusion Download PDFInfo
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- CN111090129A CN111090129A CN201911406792.1A CN201911406792A CN111090129A CN 111090129 A CN111090129 A CN 111090129A CN 201911406792 A CN201911406792 A CN 201911406792A CN 111090129 A CN111090129 A CN 111090129A
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- 229910052770 Uranium Inorganic materials 0.000 title claims abstract description 38
- JFALSRSLKYAFGM-UHFFFAOYSA-N uranium(0) Chemical compound [U] JFALSRSLKYAFGM-UHFFFAOYSA-N 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 27
- 230000004927 fusion Effects 0.000 title claims abstract description 22
- 239000011435 rock Substances 0.000 title claims abstract description 20
- 238000012545 processing Methods 0.000 claims abstract description 6
- 238000007781 pre-processing Methods 0.000 claims abstract description 4
- 238000005520 cutting process Methods 0.000 claims description 7
- 238000012952 Resampling Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 4
- 238000001308 synthesis method Methods 0.000 claims description 3
- 230000002159 abnormal effect Effects 0.000 claims 2
- 229920000642 polymer Polymers 0.000 claims 1
- 230000000007 visual effect Effects 0.000 claims 1
- 238000012790 confirmation Methods 0.000 abstract description 2
- 239000002585 base Substances 0.000 description 2
- 230000033558 biomineral tissue development Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000002285 radioactive effect Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
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Abstract
The invention belongs to the technical field of remote sensing information science and technology and geophysical prospecting technology, and particularly relates to a method for quickly searching a hard rock type uranium ore control structure based on multi-source data fusion. The method of the invention comprises the following steps: aeromagnetic and aeromagnetic data processing; preprocessing high-resolution remote sensing data; fusing data; and (5) confirmation of the uranium ore control structure. The method disclosed by the invention has the characteristics of rapidness and effectiveness in identifying the ore control structure of the hard rock type uranium ore by fusing various data such as aeromagnetic data, aerial release data, high-resolution remote sensing data and the like related to uranium ore exploration, and comprehensively and spatially superposing information related to the uranium ore.
Description
Technical Field
The invention belongs to the technical fields of remote sensing information science and technology and uranium ore geology, and particularly relates to a method for quickly searching a hard rock type uranium ore control structure based on multi-source data fusion.
Background
The ore control structure is an important factor for forming ore deposits, the determination of the ore control elements of the uranium ores is an important link of uranium ore exploration, and how to accurately determine the ore control structure has important significance for the uranium ore exploration.
Formation of hard rock type uranium ores, particularly alkali interbite type uranium ores, is accompanied by magma activity, which inevitably causes changes in geomagnetism. Of course, the radioactive characteristics of uranium ores determine that the emittance of uranium ores, particularly shallow surface uranium ores, is particularly obvious. The high-resolution remote sensing image is greatly helpful for interpreting the earth surface structure, and the interpretation precision can meet the geological exploration requirement.
The measurement and interpretation of geomagnetism, radioactive abnormity and structure by aeromagnetic, aeromagnetic and remote sensing have the characteristics of large area, rapidness and high coverage rate, and the labor cost, the time cost and the incidence rate of safety accidents are greatly reduced. Therefore, aeromagnetic data, aerial emission data and remote sensing data are organically combined, and the method plays an important role in rapid uranium ore exploration.
At present, aeromagnetic and remote sensing are mainly combined on an ArcGIS platform, layers are overlapped, and the defects that coverage among the layers is easily caused and the information of a plurality of layers is difficult to visually display are overcome. The invention is based on the ENVI platform, integrates 3 data information of aeromagnetic, aeromagnetic and high-resolution remote sensing by using three channels of RGB, solves the problem of multilayer information coverage, can very intuitively display various information, and has more direct and intuitive judgment and display on the ore control structure.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: aiming at the problem that currently, multi-source data such as aeromagnetic data, aerial release data, remote sensing data and the like are temporarily not displayed visually on an ore control structure in the same picture, so that the aim of quickly identifying the ore control structure is fulfilled, a method for quickly searching the ore control structure of the hard rock type uranium ore based on multi-source data fusion is provided, the multi-source data are fused into the same picture, the effect of visually displaying and quickly and accurately identifying the position of the ore control structure is achieved, and early-stage preparation is made for uranium ore geological exploration.
The technical scheme of the invention is as follows:
a fast searching method for a hard rock type uranium ore control structure based on multi-source data fusion comprises the following steps:
step 1, aeromagnetic and aeromagnetic data processing;
step 2, preprocessing high-resolution remote sensing data;
step 3, aeromagnetic and high-resolution remote sensing data fusion;
and 4, confirming the uranium ore control structure.
In the step 1, aeromagnetic and aeromagnetic data processing comprises the following substeps:
step 1.1, as aeromagnetic and aeromagnetic data are point set data and the data format is a grid data format, firstly, the data format of the aeromagnetic and aeromagnetic data needs to be converted into a grid data format;
step 1.2, converting coordinate systems of aeromagnetic and aeromagnetic data, wherein coordinate values of the aeromagnetic and aeromagnetic data are only numbers and have no unit significance, defining the coordinate values into a correct coordinate system with the unit significance, and then exporting data with correct coordinates;
and step 1.3, resampling aeromagnetic and aeromagnetic data, including spatial resolution resampling and cutting, so that the spatial resolution and the image size of the remote sensing data are the same as those of the remote sensing data.
In step 2, converting and cutting the high-resolution remote sensing data into a coordinate system, so that the high-resolution remote sensing data has the same coordinate system and map size with the aeromagnetic data and aeromagnetic data in front;
in step 3, packaging the data to be fused into a packaged file, and then fusing aeromagnetic, aeromagnetic and high resolution remote sensing data into a color image by an RGB (red, green and blue) band synthesis method;
in the step 4, the high-level remote sensing image in the synthetic image is equivalent to a base map, a large structure can be clearly interpreted, the place where the color brightness of the wave band where the aeromagnetic data and the navigation amplifier data are located is the superposition area of the aeromagnetic anomaly and the navigation amplifier anomaly, and the superposition area of the aeromagnetic data and the navigation amplifier data is the prediction area of the ore control structure.
As a preferable scheme: in the step 1, the higher the precision of the selected aeromagnetic and aeromagnetic original data and the spatial resolution of the remote sensing data are, the better the display effect of the fused image in the step 3 is.
The invention has the beneficial effects that:
the method for quickly searching the ore control structure of the hard rock type uranium ore based on multi-source data fusion can quickly and accurately identify the position of the ore control structure and make early-stage preparation for geological exploration of the uranium ore.
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Fig. 1 is a flow chart of a fast searching method for a hard rock type uranium ore control structure based on multi-source data fusion.
Detailed Description
The method for quickly searching the ore control structure of the hard rock type uranium ore based on multi-source data fusion is described in detail below with reference to the accompanying drawings and embodiments.
The invention relates to a fast searching method for a hard rock type uranium ore control structure based on multi-source data fusion. Firstly, selecting proper aeromagnetic, aeromagnetic and high-resolution remote sensing data, and then carrying out operations such as coordinate system conversion, resampling, cutting and the like to unify a coordinate system, spatial resolution and image size; then packing the data, and loading aeromagnetic, aeromagnetic and high-resolution remote sensing data in the RGB fusion channel respectively to obtain a fusion color image; the distribution form and position of the ore control structure are comprehensively judged through the shapes and positions of aeromagnetic and aviation amplifier anomalies with high brightness and the structural characteristics displayed by high-resolution remote sensing data.
As shown in fig. 1, the method for quickly finding the ore control structure of hard rock type uranium ore based on multi-source data fusion specifically includes the following steps:
step 1, aeromagnetic and aeromagnetic data processing comprises the following substeps:
step 1.1, aeromagnetic and navigation data of the region of the Longeh mountain in Gansu measured by a nuclear industry aerial survey remote sensing center are selected in the embodiment. Because aeromagnetic and aeromagnetic data are point set data and the data format is a grid data format, the data format of the aeromagnetic and aeromagnetic data needs to be converted into a grid data format;
step 1.2, converting coordinate systems of aeromagnetic and aeromagnetic data, wherein coordinate values of the aeromagnetic and aeromagnetic data are only numbers and have no unit significance, defining the coordinate values into a correct coordinate system with the unit significance, and then exporting data with correct coordinates;
step 1.3, re-sampling aeromagnetic and aeromagnetic data, including two parts of spatial resolution re-sampling and cutting, in this embodiment, a resize data tool in the ENVI platform is used to obtain aeromagnetic and aeromagnetic data with a spatial resolution of 1.2m and a certain size in a manner of establishing a region of interest (ROI).
Step 2, preprocessing high-resolution remote sensing data
In the embodiment, the worldview-3 remote sensing data of Longsho mountain in Gansu province is selected, and the high-resolution remote sensing data is subjected to coordinate system conversion and cutting, so that the high-resolution remote sensing data and the aeromagnetic and aerial release data in the Gansu province have the same coordinate system and picture size.
Step 3, aeromagnetic and high-resolution remote sensing data fusion;
and packaging the data needing to be fused by using a Layer Stacking tool in ENVI software, and then respectively loading aeromagnetic, aerial amplifier and high-resolution remote sensing data into a B (blue) channel, a G (green) channel and an R (red) channel by an RGB (red-green) band synthesis method to fuse into a color image.
Step 4. confirmation of ore control structure of uranium ore
The red high-resolution remote sensing image in the synthetic image is equivalent to a base image, a large structure can be clearly interpreted, the place where the color brightness of the wave band where the aeromagnetic data and the navigation amplifier data are located is the maximum (displayed as cyan) superposition area of the aeromagnetic data and the navigation amplifier data is the prediction area of the ore control structure, and the superposition area of the aeromagnetic data and the navigation amplifier data is the prediction area of the ore control structure.
The selected data is suitable data of a working area, and the selected data of other areas or research projects needs to be specifically selected for problems, especially whether aeromagnetic data are contained in the mineralization factors or not needs to be noticed. If the mineralization elements comprise one or more of U, Th and K in navigation data and main track data, the method can be used for data fusion.
The present invention has been described in detail with reference to the embodiments, but the present invention is not limited to the embodiments, and various changes can be made without departing from the gist of the present invention within the knowledge of those skilled in the art. The prior art can be adopted in the content which is not described in detail in the invention.
Claims (7)
1. A fast searching method for a hard rock type uranium ore control structure based on multi-source data fusion is characterized by comprising the following steps: the method comprises the following steps:
step (1), aeromagnetic and aeromagnetic data processing;
step (2), preprocessing high-resolution remote sensing data;
step (3), aeromagnetic and high-resolution remote sensing data fusion;
and (4) confirming the ore control structure of the uranium ore.
2. The method for rapidly finding the hard rock type uranium ore control structure based on multi-source data fusion according to claim 1, wherein the method comprises the following steps: in the step (1), the aeromagnetic and aeromagnetic data processing comprises the following substeps:
step (1.1), converting the data format of aeromagnetic and aeromagnetic data into a grid data format;
step (1.2), defining the coordinate values of aeromagnetic and aeromagnetic data into a correct coordinate system with unit significance, and deriving data with correct coordinates;
and (1.3) resampling aeromagnetic and aeromagnetic data, wherein the resampling comprises spatial resolution resampling and cutting, so that the spatial resolution and the image size of the remote sensing data are the same as those of the remote sensing data.
3. The method for rapidly finding the hard rock type uranium ore control structure based on multi-source data fusion according to claim 2, wherein the method comprises the following steps: and (3) in the step (2), converting and cutting the high-resolution remote sensing data into a coordinate system, so that the high-resolution remote sensing data has the same coordinate system and map size as the aeromagnetic and aerial playing data in the step (1.3).
4. The method for rapidly finding the hard rock type uranium ore control structure based on multiple data fusion according to claim 3, wherein the method comprises the following steps: in the step (3), the data to be fused are packaged into a packaged file, and then the aeromagnetic data, the aeromagnetic data and the high-resolution remote sensing data are fused into a color image by an RGB band synthesis method.
5. The method for rapidly finding the hard rock type uranium ore control structure based on multiple data fusion according to claim 4, wherein: in the step (4), the high-polymer remote sensing image in the synthetic image is equivalent to a base image, a large structure is clearly interpreted, the maximum color brightness position of the wave band where the aeromagnetic data and the navigation amplifier data are located is an aeromagnetic abnormal and navigation amplifier abnormal overlapping area, and the overlapping area of the aeromagnetic data and the navigation amplifier data is a prediction area of the ore control structure.
6. The method for rapidly searching the ore control structure of the hard rock type uranium ore according to claim 1, wherein: in the step (3), useful information of aeromagnetic, aeromagnetic and high-resolution remote sensing data is integrated into one image, and the method has the advantages that the information is not covered and the information display is visual.
7. The method for rapidly searching the ore control structure of the hard rock type uranium ore according to claim 2, wherein: in the step (1), the higher the precision of the selected aeromagnetic and aeromagnetic original data and the spatial resolution of the remote sensing data are, the better the display effect of the fused image in the step (3) is.
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Cited By (3)
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| CN111580182A (en) * | 2020-06-04 | 2020-08-25 | 核工业航测遥感中心 | Method for searching environment favorable for sodium-substituted uranium mineralization in second prospecting space |
| CN112380492A (en) * | 2020-10-27 | 2021-02-19 | 核工业北京地质研究院 | Uranium deposit mineralization distant view potential comparison evaluation method based on multi-source data |
| CN114386497A (en) * | 2021-12-31 | 2022-04-22 | 核工业北京地质研究院 | Aerial hyperspectral and gamma spectroscopy data fusion method for uranium metallogenic structures |
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| CN114386497A (en) * | 2021-12-31 | 2022-04-22 | 核工业北京地质研究院 | Aerial hyperspectral and gamma spectroscopy data fusion method for uranium metallogenic structures |
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