CN109709623B - Non-destructive gold mineralization detection method - Google Patents
Non-destructive gold mineralization detection method Download PDFInfo
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- CN109709623B CN109709623B CN201811242240.7A CN201811242240A CN109709623B CN 109709623 B CN109709623 B CN 109709623B CN 201811242240 A CN201811242240 A CN 201811242240A CN 109709623 B CN109709623 B CN 109709623B
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- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 title claims abstract description 47
- 239000010931 gold Substances 0.000 title claims abstract description 47
- 229910052737 gold Inorganic materials 0.000 title claims abstract description 47
- 230000033558 biomineral tissue development Effects 0.000 title claims abstract description 39
- 238000001514 detection method Methods 0.000 title claims abstract description 28
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 79
- 239000011707 mineral Substances 0.000 claims abstract description 79
- 230000004075 alteration Effects 0.000 claims abstract description 75
- 238000000034 method Methods 0.000 claims abstract description 27
- 238000010521 absorption reaction Methods 0.000 claims abstract description 26
- 238000010183 spectrum analysis Methods 0.000 claims abstract description 24
- 238000004458 analytical method Methods 0.000 claims abstract description 18
- 230000001066 destructive effect Effects 0.000 claims abstract description 11
- 238000002329 infrared spectrum Methods 0.000 claims abstract description 8
- 238000003384 imaging method Methods 0.000 claims abstract description 4
- 229910001748 carbonate mineral Inorganic materials 0.000 claims description 12
- 230000008859 change Effects 0.000 claims description 10
- 238000012545 processing Methods 0.000 claims description 8
- 229910021532 Calcite Inorganic materials 0.000 claims description 6
- 238000012844 infrared spectroscopy analysis Methods 0.000 claims description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 3
- 238000005070 sampling Methods 0.000 claims description 3
- 238000001228 spectrum Methods 0.000 claims description 3
- 238000000059 patterning Methods 0.000 claims description 2
- QYFRTHZXAGSYGT-UHFFFAOYSA-L hexaaluminum dipotassium dioxosilane oxygen(2-) difluoride hydrate Chemical compound O.[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[F-].[F-].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[K+].[K+].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O QYFRTHZXAGSYGT-UHFFFAOYSA-L 0.000 description 16
- YGANSGVIUGARFR-UHFFFAOYSA-N dipotassium dioxosilane oxo(oxoalumanyloxy)alumane oxygen(2-) Chemical compound [O--].[K+].[K+].O=[Si]=O.O=[Al]O[Al]=O YGANSGVIUGARFR-UHFFFAOYSA-N 0.000 description 12
- 229910052627 muscovite Inorganic materials 0.000 description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 229910018512 Al—OH Inorganic materials 0.000 description 5
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- 229910052618 mica group Inorganic materials 0.000 description 2
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- 229910052604 silicate mineral Inorganic materials 0.000 description 2
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- 230000005355 Hall effect Effects 0.000 description 1
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- 229910052612 amphibole Inorganic materials 0.000 description 1
- 229910001919 chlorite Inorganic materials 0.000 description 1
- 229910052619 chlorite group Inorganic materials 0.000 description 1
- QBWCMBCROVPCKQ-UHFFFAOYSA-N chlorous acid Chemical compound OCl=O QBWCMBCROVPCKQ-UHFFFAOYSA-N 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
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- 229910001649 dickite Inorganic materials 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052900 illite Inorganic materials 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 229910052622 kaolinite Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- 238000000691 measurement method Methods 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- VGIBGUSAECPPNB-UHFFFAOYSA-L nonaaluminum;magnesium;tripotassium;1,3-dioxido-2,4,5-trioxa-1,3-disilabicyclo[1.1.1]pentane;iron(2+);oxygen(2-);fluoride;hydroxide Chemical compound [OH-].[O-2].[O-2].[O-2].[O-2].[O-2].[F-].[Mg+2].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[Al+3].[K+].[K+].[K+].[Fe+2].O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2.O1[Si]2([O-])O[Si]1([O-])O2 VGIBGUSAECPPNB-UHFFFAOYSA-L 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 229910052903 pyrophyllite Inorganic materials 0.000 description 1
- 229910021647 smectite Inorganic materials 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
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Abstract
The present invention relates to a non-destructive gold mineralization detection method comprising: the method comprises the following steps of firstly, acquiring hydrothermal alteration zone distribution data through wide-area geological exploration; secondly, dividing the hydrothermal alteration zone in wide geology according to the distribution data of the hydrothermal alteration zone; a third step of selecting a hydrothermally altered mineral in the divided hydrothermally altered zones; a fourth step of collecting geological samples and accumulating the short wave infrared spectral analysis data of the hydrothermally altered minerals by a spectrometer; fifthly, imaging absorption wavelength positions and gradient changes in the short wave infrared spectral analysis data, and determining a criterion of altered mineral phases; and a sixth step of comparing the short-wave infrared spectrum analysis result of the hydrothermal alteration mineral with the alteration mineral phase judgment standard by using the portable spectrometer to determine the gold mineralization area.
Description
Technical Field
The present invention relates to a nondestructive gold mineralization detection method as a mineral resource detection, which can confirm gold mineralization by detection of a hydrothermal alteration zone.
Background
In general, in mineral resource exploration, geological and deposit resources are predicted in regions with a high probability of occurrence of useful ore bodies by applying various different exploration techniques differentiated according to the cause types of different deposit types and performing comprehensive analysis.
In particular, in the area/precision exploration of the mineralization zone, as the useful ore body exposed to the vicinity of the earth surface is depleted and the depth of occurrence of the useful ore body as an exploration target is deepened, the importance of the exploration of the hydrothermal alteration zone is more and more prominent.
As hot water (hydrothermally water) released from underground magma rises, useful minerals contained therein precipitate to form a hot water deposit (hydrothermally depots) as an ore deposit, and one of the important characteristics of the hot water deposit is that conventionally the rock reacts with a hot water solution in the periphery of the useful ore body to form a hydrothermally altered zone (hydrothermally altered zone) in which the rock or minerals are altered.
In particular, gold mineralization by hot water has recently attracted attention because it can produce not only natural gold but also invisible gold.
In the conventional hydrothermal alteration zone, the alteration mineral phase was identified mainly by an analysis method requiring a pretreatment process such as X-ray diffraction analysis (X-ray diffraction analysis) and microscopic observation, but in the late 1990 s, the identification of minerals and the exploration and study of alteration zones of various deposit types were actively carried out with the development of short-wavelength infrared analysis techniques and analysis equipment.
In field geological survey, drilling core logging (drilling core logging), aerial photography and remote exploration systems, the visible (visible) to near-infrared (near-infrared) and short-wave infrared (short-wave) hyperspectral (hyperspectral) characteristics of altered minerals (alteration minerals) are used as indicators for detecting economically useful mines, and the method is suitable for dividing altered zones and making altered zone maps.
However, there is no disclosure of a preparatory bed exploration method prior to the precision exploration for identifying useful minerals using the above indicators.
There are a clay mineral detecting apparatus and a clay mineral detecting method using the same disclosed in korean patent laid-open publication No. 1527945 (publication No.: 2015.06.10).
Documents of the prior art
Patent document
Korean granted patent No. 1527945 (announcement date: 2015.06.10)
Disclosure of Invention
Accordingly, the present invention provides a nondestructive gold mineralization detection method for identifying a hydrothermal alteration zone as evidence of gold mineralization by accumulating short-wave infrared spectroscopic analysis data by a portable spectrometer in a subdivision division of geological exploration based on a region and predicting a gold mineralization region in advance from the short-wave infrared spectroscopic analysis data, thereby significantly reducing investment in time, labor and capital required for gold detection and achieving high efficiency.
The technical problems to be solved by the present invention are not limited to the above-mentioned technical problems, and other technical problems not mentioned can be clearly understood by those skilled in the art from the following descriptions.
In order to solve the above technical problems, the present invention provides a nondestructive gold mineralization detecting method including: the method comprises the following steps of firstly, acquiring hydrothermal alteration zone distribution data through wide-area geological exploration; secondly, dividing the hydrothermal alteration zone in wide geology according to the distribution data of the hydrothermal alteration zone; a third step of selecting a hydrothermally altered mineral in the divided hydrothermally altered zones; a fourth step of collecting geological samples and accumulating the short wave infrared spectral analysis data of the hydrothermally altered minerals by a spectrometer; fifthly, imaging absorption wavelength positions and gradient changes in the short wave infrared spectral analysis data, and determining a criterion of altered mineral phases; and a sixth step of comparing the short-wave infrared spectrum analysis result of the hydrothermal alteration mineral with the alteration mineral phase judgment standard by using the portable spectrometer to determine the gold mineralization area.
Furthermore, the wide-area geological exploration can be performed by using terrestrial satellite (LANDSAT) or aerial photograph analysis to obtain hydrothermal alteration zone distribution data.
Moreover, the hydrothermal alteration zone distribution data can be obtained by using a band ratio (band ratio) remote exploration data processing technology.
In the step of selecting the hydrothermally altered mineral, a reference mineral combination group may be selected, and the hydrothermally altered mineral may be selected by spectroscopic analysis of the reference mineral combination group.
The reference mineral composition group may be one or more carbonate minerals including calcite, muscovite, and aragonite.
The hydrothermally altered mineral may be muscovite mica.
The muscovite mica has a specific absorption peak at 2200nm based on the binding vibration of Al-OH in the short-wave infrared spectroscopy.
The specific absorption peak may be determined by the change in the absorption wavelength position and the gradient by the short-wave infrared spectroscopy.
And in the step of accumulating the short wave infrared spectral analysis data by using the spectrometer, the infrared spectral analysis data can be accumulated on a sampling site by using a portable spectrometer.
Moreover, after acquiring the distribution data of the hydrothermal alteration zone through the wide-area geological exploration, the method may further include: the division of the hydrothermal alteration zone may be subdivided using a drone capable of acquiring hyperspectral images.
According to the present invention, the distribution of the hydrothermal alteration zone is confirmed by wide-area geological exploration and the hydrothermal alteration zone is subdivided and partitioned again, and short-wave infrared spectral analysis data is accumulated by short-wave infrared spectral analysis according to the above-mentioned partitioning, by which the gold-mineralization region is predicted more effectively than by an exploration method by surface exploration.
In particular, on the basis of the fact that high-quality gold is accumulated around muscovite mica, which is detected as the center of hot water forming the hydrothermal alteration zone, the muscovite mica is selected as a spectroscopically indicating mineral-hydrothermal alteration mineral, and a sample collected during the division into fine fractions is analyzed by a portable spectrometer, and whether or not the exploration of the gold mineralization area is continued is immediately confirmed and determined at the mineral exploration site.
And, accumulate the short wave infrared spectral analysis result of the muscovite to form the database, along with the accumulation of the spectral analysis result of the above-mentioned data, the detection accuracy of the alteration mineral phase that has muscovite is increased more, thus have the advantage that the prediction of the mineralization area becomes more and more accurate in the course of carrying on the exploration of the mineral.
Further, since the collected sample is not subjected to chemical or physical analysis, but to an exploration process by performing short-wave infrared spectroscopy with a portable spectrometer at a predetermined distance, the gold mineralization is efficiently detected without destroying the sample.
Drawings
FIG. 1 is a flow chart illustrating the sequence of a non-destructive gold mineralization detection method in accordance with an embodiment of the present invention.
FIG. 2 is a short wavelength infrared spectrum showing the absorption peak of muscovite mica in a non-destructive gold mineralization detection method in accordance with an embodiment of the present invention.
Detailed Description
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Advantages, features and methods of accomplishing the same may be understood by reference to the following detailed description of embodiments taken in conjunction with the accompanying drawings.
However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various ways different from each other, and the embodiments are only for complete disclosure of the present invention and are provided for the purpose of enabling those skilled in the art to fully understand the scope of the present invention, which is defined only by the scope of the claims of the present invention.
In describing the present invention, when it is determined that the gist of the present invention may be confused by related known techniques or the like, detailed description thereof will be omitted.
FIG. 1 is a flow chart illustrating the sequence of a non-destructive gold mineralization detection method in accordance with an embodiment of the present invention.
Referring to fig. 1, a non-destructive gold mineralization detection method includes: the method comprises the following steps of firstly, acquiring hydrothermal alteration zone distribution data through wide-area geological exploration; secondly, dividing the hydrothermal alteration zone in wide geology according to the distribution data of the hydrothermal alteration zone; a third step of selecting a hydrothermally altered mineral in the divided hydrothermally altered zones; a fourth step of collecting geological samples and accumulating the short wave infrared spectral analysis data of the hydrothermally altered minerals by a spectrometer; fifthly, imaging absorption wavelength positions and gradient changes in the short wave infrared spectral analysis data, and determining a criterion of altered mineral phases; and a sixth step of comparing the short-wave infrared spectrum analysis result of the hydrothermal alteration mineral with the alteration mineral phase judgment standard by using the portable spectrometer to determine the gold mineralization area.
First, hydrothermal alteration zone distribution data is acquired through wide-area geological exploration (S100).
The above-mentioned hydrothermally altered band may representatively include: silicate minerals including kaolinite, dickite, pyrophyllite, illite, chlorite, amphibole, smectite, micas, and the like; sulfate minerals including gypsum, alunites, and the like; and carbonate minerals including calcite, muscovite, and the like.
The wide-area geological survey described above confirms the rough distribution of the hydrothermal alteration zone, and is repeatedly executed to accumulate it as a database.
The wide area geological survey may be analyzed by terrestrial satellite (LANDSAT) or aerial photographs to obtain hydrothermal alteration zone distribution data.
The above-mentioned terrestrial satellite is a terrestrial observation satellite, and provides spectra of wavelengths in the near infrared band and the visible light band.
The hydrothermal alteration zone is divided in a wide-area geology according to the distribution data of the hydrothermal alteration zone (S200).
The acquisition of distribution data of hydrothermal alteration zone through the wide-area geological exploration can be calculated through data processing technology of satellite or aerial photos.
Derived based on the above-mentioned satellite or aerial photograph data processing in a manner that improves the position accuracy of the hydrothermal alteration zone.
In the case of confirming the hydrothermal alteration zone based on the above data processing, the efficiency of nondestructive gold mineralization detection can be improved by using the acquired terrestrial satellite or aerial photograph.
The hydrothermal alteration zone distribution data can be obtained by a band ratio (band ratio) remote exploration data processing technology.
In the spectrum of the terrestrial satellite photograph, the distribution of the hydrothermal alteration bands may be specified to include the distribution of the hydrothermal alteration bands of carbonate minerals of calcite (calcite) and muscovite (muscovite) in the distribution of the hydrothermal alteration bands, with emphasis on the band 5 at 1500nm to 1800nm versus the band 7 at 2000nm to 2400 nm.
Based on the data processing techniques described above, the distribution of the hydrothermal alteration zone comprised of carbonate minerals in the hydrothermal alteration zone can be specified for compartmentalization.
When the distribution of the hydrothermal alteration zone is confirmed to subdivide the hydrothermal alteration zone, the detection efficiency of the gold mineralization can be improved.
Hydrothermal alteration minerals are selected in the divided hydrothermal alteration zones (S300).
Wherein in the step of selecting the hydrothermally altered mineral, a reference mineral combination group is selected and the hydrothermally altered mineral is selected by spectroscopic analysis of the reference mineral combination group.
The hydrothermally altered mineral may include a silicate mineral, a sulfate mineral, or a carbonate mineral, and the step of obtaining the distribution data of the hydrothermally altered band may select the distribution data for the carbonate mineral.
Thus, the reference mineral composition group is one or more of carbonate minerals including calcite, muscovite and aragonite.
According to the distribution data of the hydrothermal alteration zone, the hydrothermal alteration zone mainly comprising carbonate minerals is confirmed, and the gold mineralization is predicted in a wide area, so that the detection possibility of the gold mineralization can be improved.
Hydrothermally altered minerals can then be selected by spectroscopic analysis in the above-mentioned reference mineral combination group.
The identification of minerals is difficult using a microscope due to the poor particle or crystallinity of most of the above hydrothermally altered minerals.
Since infrared spectroscopy, which is easy to measure in the field, is very effective, muscovite mica, which can be distinguished from optical characteristics by means of a portable short-wave infrared spectrometer, is preferably selected as a hydrothermally altered mineral with reference to a group of mineral combinations.
The muscovite mica (white mica) is widely present in the hydrothermal alteration zone, and can express a change in mineral composition depending on the distance from a useful ore body.
In particular, the distribution of useful ore bodies such as gold ore was confirmed at 5 to 7km around muscovite mica.
Thus, the hydrothermally altered mineral is muscovite mica.
The muscovite mica had a specific absorption peak at 2200nm based on the binding vibration of Al-OH in the short-wave infrared spectroscopic analysis.
The specific absorption peak at 2200nm of the muscovite mica based on Al-OH binding oscillation becomes a spectroscopic indicator for confirmation of hydrothermally altered minerals.
A geological sample is taken and a spectrometer is used to accumulate short wave infrared spectral analysis data of the hydrothermally altered minerals (S400).
The act of acquiring spectral analysis data through the taking of a geological sample may be performed multiple times to accumulate.
The operation of acquiring spectral analysis data by sampling the geological sample described above is preferably performed at a plurality of locations within a divided hydrothermal alteration zone, because the accuracy of comparing the results of short-wave infrared spectral analysis of a hydrothermal alteration mineral and the criterion for determining the phase of the alteration mineral with a portable spectrometer, which will be described later, is improved.
In the short wave infrared spectral analysis data, the absorption wavelength position and the gradient change are patterned, and a criterion for determining a altered mineral phase is determined (S500).
In order to determine the above-mentioned criterion for the altered mineral phase, muscovite mica was selected as the hydrothermally altered mineral.
It was confirmed that the specific absorption peak was determined from the change in the absorption wavelength position and the gradient of the short-wave infrared spectroscopic analysis.
In the step of accumulating the short wave infrared spectral analysis data by using the portable spectrometer, the infrared spectral analysis data is accumulated on site by using the portable spectrometer.
When the portable spectrometer is used to accumulate data, it is possible to determine whether or not to continue the nondestructive gold mineralization immediately on site, and this is a nondestructive method that does not perform physical or chemical analysis on a sample, and is therefore very advantageous.
FIG. 2 is a short wavelength infrared spectrum showing the absorption peak of muscovite mica in a non-destructive gold mineralization detection method in accordance with an embodiment of the present invention.
Referring to FIG. 2, the position and gradient of the 2200nm specific absorption peak based on the Al-OH binding vibration of the muscovite mica were confirmed.
The position and gradient of the specific absorption peak can be changed depending on the surface state of the sample and the moisture content condition when a portable spectrometer is used.
Therefore, when the above-described criterion for determining the altered mineral phase is determined by patterning the absorption wavelength position and the gradient change, the presence or absence of muscovite mica as a hydrothermally altered mineral in the hydrothermally altered band can be predicted very effectively from the above-described criterion even by a portable spectrometer.
Selecting muscovite as a gold mineralization indication mineral, performing short-wavelength infrared spectral analysis specific to the muscovite, taking the absorption wavelength position and gradient change as judgment standards to collect geological samples again, and acquiring a short-wavelength infrared spectral analysis result of the hydrothermally altered mineral by using a portable spectrometer.
And comparing the judgment standard with the result of the short-wavelength infrared analysis of the sample, predicting the presence of the hydrothermally altered mineral on the basis of the judgment standard, and determining a detection area for the nondestructive mineralization of gold, or a detection program for stopping the nondestructive mineralization of gold by causing the hydrothermally altered mineral to be present in the area.
On the other hand, after acquiring the distribution data of the hydrothermal alteration zone through the wide-area geological exploration (S100), the method may further include the step of subdividing the division of the hydrothermal alteration zone by using an unmanned aerial vehicle which acquires a hyperspectral image.
Hydrothermal alteration zones can be distinguished according to the types of hot water minerals by obtaining the hyperspectral images, and when the division is subdivided by using an unmanned aerial vehicle, compared with the division of the hydrothermal alteration zones according to distribution data of the hydrothermal alteration zones, the shortwave infrared spectrum analysis objects are greatly reduced, and the overall efficiency of the nondestructive gold mineralization detection method can be improved.
Hereinafter, preferred embodiments are proposed to facilitate understanding of the present invention, but the following embodiments are merely illustrative of the present invention, and the scope of the present invention is not limited to the following embodiments.
< example 1>
A Thematic Mapper (TM) image of a land satellite in gold mine area of the Australian Sunrise Dam (Sunrise Dam) is obtained and processed by data processing.
Emphasizing the band ratio 5/7, areas with absorption peaks in the 2000nm to 2400nm region were identified, hydrothermal alteration zones mainly comprising carbonate minerals were identified as being divided,
the drilling sample was secured within the divided hydrothermal alteration zone and short wave infrared spectroscopy data was confirmed using a portable spectrometer (TeraSpec Hall Effect identifier).
After repeating the measurement 10 times, it was confirmed that the sample had an absorption peak at 2190 to 2200nm and that the sample had a specific position and a gradient change at a wavelength around 2000nm due to Al-OH bonding of muscovite mica, thereby determining a standard for determining a modified mineral phase.
Compared with the analysis result of the sample in the area around the mine, the sample in the gold mine area has a remarkable absorption peak value of 2000nm, is judged to meet the alteration mineral phase judgment standard, and is predicted to be the gold mineralization area.
The nondestructive gold mineralization detecting method of the present invention obtains distribution data of a hydrothermal alteration zone based on a satellite or an aerial photograph, and divides the hydrothermal alteration zone mainly composed of carbonate minerals, thereby improving accuracy and efficiency of a detection process of gold mineralization, and thereafter, determines a specific absorption peak as a result of short-wave infrared spectrum analysis as an altered mineral phase judgment standard for identifiable muscovite as a method for confirming the presence of muscovite based on a very high probability that gold minerals, which are useful minerals, can be detected around muscovite in the carbonate minerals.
Therefore, when the detection of the non-destructive gold mineralization is continuously performed, it can be quickly judged whether or not the detection of the non-destructive gold mineralization is continued, as compared with the criterion for judging the altered mineral phase.
Further, since whether or not gold is mineralized can be detected on the site by applying short-wavelength infrared analysis as a non-destructive measurement method based on hydrothermal alteration zone distribution data as a pre-accumulated database, the accuracy of mineral detection can be greatly improved compared to the conventional method, and whether or not detection is continued can be determined on the site, and the method is suitable for a preparatory process for confirming the formal deposit detection of gold.
Also, the present invention is a method of reducing the detection division according to the steps, which can reduce the consumption of manpower, expenses, and time for non-destructive gold mineralization detection.
While the present invention has been described with reference to the embodiments of the film roll core and the method for manufacturing the same for preventing the level difference by the precision etching, it is obvious that various modifications can be made without departing from the scope of the present invention.
Accordingly, the scope of the invention should not be limited to the described embodiments, but should be determined with reference to the appended claims along with their full scope of equivalents.
That is, it should be understood that the foregoing embodiments are illustrative in all aspects and not restrictive, the scope of the invention being indicated by the foregoing claims rather than the detailed description, and all changes and modifications that come within the meaning and range of equivalency of the claims are to be construed as being included therein.
Claims (1)
1. A non-destructive gold mineralization detection method, comprising:
acquiring distribution data of hydrothermal alteration zone through wide-area geological exploration (step 1);
dividing the hydrothermal alteration zone according to the distribution data of the hydrothermal alteration zone in wide-area geology (step 2);
selecting a hydrothermally altered mineral in the divided hydrothermally altered zones (step 3);
collecting a geological sample, and accumulating short-wave infrared spectral analysis data of the hydrothermally altered minerals on a sampling site by using a portable spectrometer (step 4);
imaging absorption wavelength positions and gradient changes in the short-wave infrared spectral analysis data, and determining a criterion for determining a altered mineral phase (step 5); and
then, a geological sample is taken again, the short wave infrared spectrum analysis result of the hydrothermally altered mineral and the altered mineral phase judgment standard are compared by a portable spectrometer to determine a gold mineralization area (step 6),
in the step 2, when acquiring distribution data of the hydrothermal alteration zone, dividing the area having an absorption peak in a region of 2,000 to 2,400nm by using a remote survey data processing technique of a band ratio by emphasizing the band ratio of 5/7 through a land satellite (LANDSAT) or aerial photograph analysis, in the step 3, selecting a reference mineral group and selecting a hydrothermal alteration mineral through analysis of a spectroscopic spectrum in the reference mineral group, the reference mineral group being one or more carbonate minerals including calcite and aragonite, in the step 4, accumulating short-wave infrared spectroscopic analysis data with the absorption peak of 2,200nm as a target, confirming a change in the absorption wavelength position and gradient change according to the surface state and moisture content condition of the sample, and patterning the absorption wavelength position and gradient change,
the method further includes the step of subdividing the division of the hydrothermal alteration zone by using an unmanned aerial vehicle after acquiring distribution data of the hydrothermal alteration zone through the wide-area geological exploration, wherein the unmanned aerial vehicle can acquire a hyperspectral image so that shortwave infrared spectral analysis objects are reduced compared with a case of dividing the hydrothermal alteration zone according to the distribution data of the hydrothermal alteration zone.
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