CN114152995B - Gold ore rapid prospecting method suitable for cutting shallow coverage area in south Qin Linggao - Google Patents
Gold ore rapid prospecting method suitable for cutting shallow coverage area in south Qin Linggao Download PDFInfo
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- 239000010931 gold Substances 0.000 title claims abstract description 124
- 229910052737 gold Inorganic materials 0.000 title claims abstract description 115
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 title claims abstract description 111
- 238000000034 method Methods 0.000 title claims abstract description 49
- 238000005520 cutting process Methods 0.000 title claims description 15
- 230000002159 abnormal effect Effects 0.000 claims abstract description 105
- 229910052785 arsenic Inorganic materials 0.000 claims abstract description 68
- 239000002689 soil Substances 0.000 claims abstract description 67
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 claims abstract description 66
- 238000005070 sampling Methods 0.000 claims abstract description 54
- 238000004458 analytical method Methods 0.000 claims abstract description 50
- 238000005553 drilling Methods 0.000 claims abstract description 36
- 238000005259 measurement Methods 0.000 claims abstract description 32
- 230000033558 biomineral tissue development Effects 0.000 claims abstract description 27
- 230000008569 process Effects 0.000 claims abstract description 14
- 238000012795 verification Methods 0.000 claims abstract description 12
- 230000004075 alteration Effects 0.000 claims description 28
- 230000008859 change Effects 0.000 claims description 23
- 238000005065 mining Methods 0.000 claims description 19
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 16
- 239000011707 mineral Substances 0.000 claims description 16
- 239000000126 substance Substances 0.000 claims description 12
- 238000011160 research Methods 0.000 claims description 11
- 238000001228 spectrum Methods 0.000 claims description 11
- 230000002349 favourable effect Effects 0.000 claims description 8
- 239000013049 sediment Substances 0.000 claims description 6
- 238000012876 topography Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 5
- 230000007480 spreading Effects 0.000 claims description 5
- 238000003892 spreading Methods 0.000 claims description 5
- 238000012360 testing method Methods 0.000 claims description 5
- 238000009826 distribution Methods 0.000 claims description 4
- 238000009960 carding Methods 0.000 claims description 3
- 239000004568 cement Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 230000011218 segmentation Effects 0.000 claims 3
- 230000037237 body shape Effects 0.000 claims 2
- 238000010276 construction Methods 0.000 description 12
- 238000011835 investigation Methods 0.000 description 8
- 238000001514 detection method Methods 0.000 description 5
- 230000007613 environmental effect Effects 0.000 description 5
- 230000005856 abnormality Effects 0.000 description 4
- 238000007689 inspection Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 238000012163 sequencing technique Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- VJRVSSUCOHZSHP-UHFFFAOYSA-N [As].[Au] Chemical compound [As].[Au] VJRVSSUCOHZSHP-UHFFFAOYSA-N 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
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- 230000001419 dependent effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V8/00—Prospecting or detecting by optical means
- G01V8/02—Prospecting
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
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Abstract
The invention relates to a gold mine rapid prospecting method suitable for a shallow coverage area cut by south Qin Linggao, which comprises the steps of firstly determining Jin Zhaokuang target area, carrying out 1:1 ten thousand soil geochemical measurement work in Jin Zhaokuang target area, classifying soil high-value points according to a single element anomaly map, sampling basic analysis samples according to classification results and a portable spectrometer, defining mineralization bodies, arranging audio magnetotelluric sounding sections in the trend of the vertical mineralization bodies, carrying out measurement along section lines, forming AMT inversion results, determining deep extension conditions of the mineralization bodies, and finally carrying out deep verification on mineralization body arrangement drilling holes to complete the prospecting process of gold mine. According to the invention, the soil high-value points are introduced to remove the soil result points with smaller gold and arsenic abnormal values, and the portable spectrometer is utilized to sample the basic analysis sample, so that the sampling process is more targeted, the sampling efficiency is improved, and the rapid prospecting of gold ores can be realized.
Description
Technical Field
The invention relates to the technical field of prospecting, in particular to a gold ore rapid prospecting method suitable for cutting shallow coverage areas in south Qin Linggao.
Background
Gold mineral resources in the south Qinling area are rich, but the topography is steep due to high cutting, and the fourth system is seriously covered, so that challenges are presented to the traditional mining method. The common technical means for prospecting is to obtain abnormal prospecting, sequencing and slot prospecting disclosure by utilizing the scanning surface and the map filling work, but gold ores are different from nonferrous metal minerals which are easy to identify, and are relatively dependent on sample testing, and the layout position of the samples is important for the mining of the gold ores.
Based on this, there is a need for a rapid gold mining method suitable for cutting shallow coverage areas in south Qin Linggao.
Disclosure of Invention
The invention aims to provide a gold ore rapid prospecting method suitable for cutting shallow coverage areas in south Qin Linggao, which can rapidly determine the position of gold ores and improve the prospecting efficiency of gold ores.
In order to achieve the above object, the present invention provides the following solutions:
a rapid gold ore prospecting method suitable for cutting shallow coverage areas in south Qin Linggao, the rapid gold ore prospecting method comprising:
performing comprehensive study on the study area to determine a Jin Zhaokuang target area;
performing 1:1 ten thousand soil geochemical measurement work in the Jin Zhaokuang target area to form a single-element anomaly map; the single element anomaly map comprises an Au anomaly map and an As anomaly map;
classifying the high-value points of the soil according to the single element anomaly map, sampling a basic analysis sample by using a portable spectrometer according to the classification result, and defining a mineralizer based on the analysis result of the basic analysis sample; the soil high-value point is a soil result point with a gold abnormal value larger than or equal to a first preset gold abnormal value or an arsenic abnormal value larger than or equal to a first preset arsenic abnormal value in the soil result points of the 1:1 ten thousand soil geochemical measurement work;
an audio magnetotelluric sounding section is arranged perpendicular to the trend of the mineralized body, measurement is carried out along a section line, an AMT inversion result is formed, and the deep extension condition of the mineralized body is determined;
and (5) carrying out deep verification on the mineralized body layout drilling holes to finish the gold ore searching process.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the invention provides a gold mine rapid prospecting method suitable for a shallow coverage area cut by south Qin Linggao, which comprises the steps of determining a Jin Zhaokuang target area, and carrying out 1:1 ten thousand soil geochemical measurement in a Jin Zhaokuang target area to form a single element anomaly map, wherein the single element anomaly map comprises an Au anomaly map and an As anomaly map. And classifying the high-value points of the soil according to the abnormal unit pixel diagram, sampling a basic analysis sample by using a portable spectrometer according to the classification result, delineating a mineralized body based on the analysis result of the basic analysis sample, laying an audio magnetotelluric sounding section on the trend of the vertical mineralized body, carrying out measurement along a section line to form an AMT inversion result, determining the deep extension condition of the mineralized body, finally carrying out deep verification on the laying and drilling of the mineralized body, and finally completing the prospecting process of gold ore by combining the drilling and sample distribution work with the portable spectrometer. According to the invention, the high-value points of the soil are introduced to remove the soil result points with smaller gold and arsenic abnormal values, so that the number of basic analysis samples can be reduced, the sampling efficiency of the basic analysis samples is remarkably improved, and the portable spectrometer is used for sampling the basic analysis samples, so that the sampling process is more targeted and accurate, the sampling efficiency is improved, and the rapid prospecting of gold ores can be realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a method for quick prospecting according to embodiment 1 of the present invention;
FIG. 2 is a flowchart of the method for quick prospecting according to embodiment 1 of the present invention;
FIG. 3 is a schematic view showing an abnormality of the aqueous sediment according to example 1 of the present invention;
FIG. 4 is a schematic diagram of the layout of 1:1 ten thousand soil points in a Wang Zhuangjin mining target area provided in example 1 of the present invention;
FIG. 5 is a gold geochemical diagram of the soil measurement of Wangzhuang provided in example 1 of the present invention;
FIG. 6 is a binary function chart of the soil measurement result of the Wang Zhuangjin mining target area provided in example 1 of the present invention;
FIG. 7 is a plane contour map of the apparent polarizability of a Wang Zhuangjin prospecting target area provided in example 1 of the present invention;
FIG. 8 is a plane contour plot of apparent resistivity of a Wang Zhuangjin prospecting target area provided in example 1 of the present invention;
FIG. 9 is an inversion result of AMT of Wang Zhuangjin mining target area provided in example 1 of the present invention;
fig. 10 is a Wang Zhuangjin mining target area borehole verification scheme provided in example 1 of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention aims to provide a gold ore rapid prospecting method suitable for cutting shallow coverage areas in south Qin Linggao, which can rapidly determine the position of gold ores and improve the prospecting efficiency of gold ores.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
Example 1:
the embodiment is used for providing a gold ore rapid prospecting method suitable for cutting shallow coverage areas in south Qin Linggao, as shown in fig. 1 and fig. 2, the rapid prospecting method includes:
s1: performing comprehensive study on the study area to determine a Jin Zhaokuang target area;
specifically, S1 may include:
1) Determining a gold favorable ore formation area through regional remote sensing data, geophysical prospecting data and chemical prospecting data of a research area;
the regional remote sensing data comprises earth surface construction information, the geophysical prospecting data comprises alteration information and deep geological construction information, and the chemical prospecting data comprises gold anomaly information and arsenic anomaly information.
2) Carrying out 1:5 ten thousand water system sediment measurement work in a gold favorable ore formation area, and determining a key work area;
after carrying out 1:5 ten thousand water system sediment measurement work, gold and arsenic abnormality can be obtained, screening and checking work is carried out according to gold and arsenic abnormality sequencing, and a key work area is selected.
3) And carrying out 1:1 general geological investigation in the key working area to determine a Jin Zhaokuang target area.
Specifically, a 1:1 ten thousand special geological survey is carried out in a key working area, the special geological survey is field actual survey, a structural lithology chart is filled out, the structural lithology chart is used for representing space-time distribution of different structural units and different lithology or lithology combinations related to the structural lithology chart and internal structural element characteristics of the structural lithology chart, and structural information and lithology information of the key working area can be displayed. And then determining a strong alteration area according to the structural lithology graph, specifically, determining an ore control structure and an ore containing construction according to the structural lithology graph, and determining the strong alteration area according to the ore control structure and the ore containing construction. And collecting a basic chemical sample at a region with strong alteration, preliminarily finding out mineralization clues and the trend of an alteration zone according to the analysis result of the basic chemical sample, wherein the alteration zone comprises a mineralization alteration zone and a broken alteration zone, further determining the trend of the mineralization alteration zone, and determining a Jin Zhaokuang target region.
According to the embodiment, on the basis of working in the early-stage area, abnormal verification of the key area is carried out, and the area where gold mineralization is located can be gradually reduced, so that a Jin Zhaokuang target area is determined, the ore finding time is shortened, and the ore finding speed is improved.
As an alternative implementation, before determining the gold favorable ore forming area, the rapid ore finding method of the present embodiment further includes: and (3) carrying out comprehensive research on a research area, carding typical Jin Kuangchuang in the research area, summarizing ore deposit ore forming elements, and obtaining gold mineralization alteration characteristics in the area, wherein the gold mineralization alteration characteristics in the area are used for assisting the ore finding process of gold ores.
S2: performing 1:1 ten thousand soil geochemical measurement work in the Jin Zhaokuang target area to form a single-element anomaly map; the single element anomaly map comprises an Au anomaly map and an As anomaly map;
when 1:1 ten thousand soil geochemical measurement works are carried out in a mining target area, 100m multiplied by 40m or 100m multiplied by 20m is adopted As the network, soil result points are distributed according to the trend of a mineralized change zone, and finally, a single element anomaly map of Au, as and the like is formed, and meanwhile, a comprehensive anomaly map can be generated and can be used for assisting the classification process of high-value points of soil.
S3: classifying the high-value points of the soil according to the single element anomaly map, sampling a basic analysis sample by using a portable spectrometer according to the classification result, and defining a mineralizer based on the analysis result of the basic analysis sample; the soil high-value point is a soil result point with a gold abnormal value larger than or equal to a first preset gold abnormal value or an arsenic abnormal value larger than or equal to a first preset arsenic abnormal value in the soil result points of the 1:1 ten thousand soil geochemical measurement work;
in S3, classifying the soil high value points according to the single element anomaly map (i.e., soil Au, as results) may include:
1) Judging whether the gold abnormal value of each soil high value point is larger than or equal to a second preset gold abnormal value or whether the arsenic abnormal value is larger than or equal to a second abnormal arsenic abnormal value or not, and obtaining a first judging result;
2) If the first judgment result is yes, namely the abnormal value of gold is larger than or equal to a second preset abnormal value of gold, or the abnormal value of arsenic is larger than or equal to a second abnormal value of arsenic, the high-value point of the soil is a 1-level check point; if the first judgment result is negative, judging whether the gold abnormal value of the soil high value point is larger than or equal to a third preset gold abnormal value or whether the arsenic abnormal value is larger than or equal to a third preset arsenic abnormal value, and obtaining a second judgment result; the third preset gold anomaly value is smaller than the second preset gold anomaly value, and the third preset arsenic anomaly value is smaller than the second preset arsenic anomaly value;
3) If the second judgment result is yes, the soil high value point is a 2-level check point; if the second judgment result is negative, judging whether the gold abnormal value of the soil high value point is larger than or equal to a fourth preset gold abnormal value or whether the arsenic abnormal value is larger than or equal to a fourth abnormal arsenic abnormal value, and obtaining a third judgment result; the fourth preset gold anomaly value is smaller than the third preset gold anomaly value, and the fourth preset arsenic anomaly value is smaller than the third preset arsenic anomaly value;
4) If the third judgment result is yes, the soil high value point is a 3-level check point; if the third judgment result is negative, judging whether the gold abnormal value of the soil high value point is larger than or equal to a fifth preset gold abnormal value or whether the arsenic abnormal value is larger than or equal to a fifth abnormal arsenic abnormal value, and obtaining a fourth judgment result; the fifth preset gold anomaly value is less than the fourth preset gold anomaly value, and the fifth preset arsenic anomaly value is less than the fourth preset arsenic anomaly value; the fifth preset gold anomaly value is greater than the first preset gold anomaly value, and the fifth preset arsenic anomaly value is greater than the first preset arsenic anomaly value;
5) If the fourth judgment result is yes, the soil high value point is a 4-level check point; if the fourth judgment result is negative, the soil high value point is a 5-level check point.
More specifically, the first preset gold anomaly value is 20, and the first preset arsenic anomaly value is 40; the second preset Jin Yi constant is 300 and the second preset arsenic abnormal value is 600; the third preset gold anomaly value is 200, and the third preset arsenic anomaly value is 400; the fourth preset gold anomaly value is 100, and the fourth preset arsenic anomaly value is 200; the fifth preset Jin Yi constant is 50 and the fifth preset arsenic anomaly is 100. Classifying the soil high value points by Au (gold), as (arsenic) outliers (unit: ppb) may include: let a=au abnormal, b=as abnormal, and there is a binary function y=f (a; b). Then a class 1 checkpoint with y1=f (a. Gtoreq.300; b. Gtoreq.600); y2=f (300 > a. Gtoreq.200; 600 > b. Gtoreq.400) is a class 2 checkpoint; y3=f (200 > a. Gtoreq.100; 400 > b. Gtoreq.200) is a class 3 checkpoint; y4=f (100 > a. Gtoreq.50; 200 > b. Gtoreq.100) is a class 4 checkpoint; y5=f (50 > a. Gtoreq.20; 100 > b. Gtoreq.40) is a class 5 checkpoint.
In S3, according to the classification result, sampling the basic analysis sample by using the portable spectrometer may include adopting different sampling methods for checkpoints of different grades, which specifically includes:
1) For a class 1 checkpoint, the class 1 checkpoint needs to check the source of the anomaly, and the sampling method is as follows: the method comprises the steps of utilizing a knapsack drill to carry out bedrock abnormal source disclosure, specifically utilizing the knapsack drill to carry out bedrock drilling, determining a plurality of measurement points on a drilling core along the drilling depth direction based on a preset length, wherein the preset length can be 5cm, and then utilizing a portable spectrometer to determine an arsenic abnormal change value of each measurement point on the drilling core. And carrying out sectional sampling according to the abnormal arsenic change value to obtain a plurality of basic analysis samples corresponding to the 1-level check point. Specifically, after determining the As abnormal change value in the columnar drill core, registering the position of the analysis result As abnormal change value more than or equal to 0.02%, and meanwhile, carrying out sectional sampling by adopting basic analysis samples according to the sectional ranges of the As abnormal change value less than 0.1%, the As abnormal change value less than 0.1% and less than 0.5% and the As abnormal change value less than 0.5%, and ensuring that the length meets the sample test quality requirement. During sampling, a split core sampling mode is adopted, namely, a columnar drill core is split into two halves, and half is taken as a basic analysis sample.
2) For class 2 checkpoints and class 3 checkpoints, class 2 checkpoints and class 3 checkpoints require an approximate pinpointing of the source of the anomaly in a sampling manner that is: judging whether the level 2 check point or the level 3 check point is in the extending direction of the mineralization alteration zone where the level 1 check point is located; if yes, sampling the 2-level check point or the 3-level check point in a 1-level check point sampling mode to obtain a plurality of basic analysis samples corresponding to the 2-level check point or the 3-level check point; if not, sampling on a mineralization alteration zone around the class 2 check point or the class 3 check point to obtain a plurality of basic analysis samples or spectrum samples corresponding to the class 2 check point or the class 3 check point; specifically, the sampling mode of the 2-level check point or the 3-level check point is as follows: for the exposed better sections of the bedrock, the main points are the notch samples, and the rest sections are the block picking samples. It should be noted that the spectrum sample and the basic analysis sample do not belong to a class, the basic analysis sample is quantitative, the spectrum sample belongs to semi-quantitative, if the abnormal source of the area is not determined, the spectrum sample can be collected to judge whether the abnormal source exists, and the spectrum analysis cost is low and rapid.
3) For the class 4 check point and the class 5 check point, adopting a route investigation mode, and specifically adopting the sampling mode as follows: sampling is carried out on mineralization alteration zones around the class 4 check point or the class 5 check point, and a plurality of bedrock basic analysis samples or spectrum samples corresponding to the class 4 check point or the class 5 check point are obtained. The sampling mode of the class 4 check point or the class 5 check point is as follows: mainly adopts block sample detection.
The portable spectrometer is an auxiliary means for sampling the notch sample and the core sample, and if the portable spectrometer is used for sampling by means of sample picking, the portable spectrometer is not used. In sampling, sampling of the basic analysis samples was performed sequentially in order from the class 1 checkpoint to the class 5 checkpoint.
As an alternative embodiment, if the analysis results of the basic analysis sample and the spectrum sample in the steps 2) and 3) above show that the position of the check point is an Au abnormal obvious section, that is, the result of the basic analysis sample is greater than 0.1g/t and the result of the spectrum sample is greater than 20ppb, the sampling is required according to the sampling method in the step 1).
Gold ores are different from nonferrous metal ores, the selection of sampling positions is important for accurately delineating gold ore mineralizers completely according to sampling test results, continuous sampling is often adopted by conventional means in the past, accurate boundaries of ore bodies and surrounding rocks are difficult to identify by the means, and the phenomena of grade reduction and even ore leakage exist. The embodiment utilizes the correlation of gold and arsenic, and the position of a gold mineralizer is accurately defined by analyzing the arsenic concentration of the rock core through a portable spectrometer, and the rock core is not easy to leak
In addition, in this embodiment, a high-value point (also referred to as a soil anomaly point) is first introduced, a soil anomaly area is defined by using the correlation of gold and arsenic, and soil anomaly inspection is performed in the area, so that anomaly inspection efficiency can be improved. And secondly, classifying by using the gold-arsenic soil abnormal values, and sequentially checking according to the sequence from the 1-level check point to the 5-level check point, so that the important check area can be accurately identified. For the 1-level check point and other check points of the 1-level check point extending direction, a knapsack drill is adopted to obtain a core, on sampling, the knapsack drill is utilized to rapidly analyze the obtained core, an arsenic abnormal region is effectively distinguished, samples in different arsenic abnormal regions are taken in a segmented mode, the samples are taken in a targeted mode, the sampling efficiency and the accuracy are improved, and more beneficial evidence is provided for defining subsequent ore bodies. Because the topography of the south Qin mountain area is steep, the coverage layer is thick, the trench exploration work is difficult to identify the exposure of the original abnormal source, the local environmental protection policy is strict, the trench exploration work can not expose bedrock according to the conventional method, and meanwhile, the trench exploration work can cause the risk problems of environmental damage and the like for the earth surface excavation. The embodiment uses the knapsack drill to replace the groove detection for construction, and can ensure the engineering progress and quality.
After the mineralized body is defined based on the analysis result of the basic analysis sample, the rapid ore finding method of the embodiment can further comprise drawing a mineral body plane geological map according to the position range of the defined mineralized body.
S4: an audio magnetotelluric sounding section is arranged perpendicular to the trend of the mineralized body, measurement is carried out along a section line, an AMT inversion result is formed, and the deep extension condition of the mineralized body is determined;
an audio magnetotelluric sounding (AMT) section is arranged perpendicular to the direction of the mineralized body, the section distance is 200 meters, the point distance is 20-40 meters, and the point distance between two sides of the mineralized body within 40 meters is encrypted to be 20 meters. And performing line navigation through the GPS handset or the Beidou handset terminal, performing measurement along a section line, performing computer data processing on data acquired in the measurement process to form an AMT inversion result, and determining the deep extension condition of the mineralized body by combining geological awareness. The method of audio magnetotelluric sounding is selected, so that the problem of poor ladder effect in high cutting area excitation is solved, the deep extension condition of a mineralized body is effectively controlled, and a basis is provided for resource potential evaluation.
After determining the deep extension condition of the mineralized body, the rapid mining method of the embodiment further includes: and (3) carrying out comprehensive synthesis on the geophysical prospecting data, the chemical prospecting data, the position and deep extension condition (namely mineralizing information) of the mineralized body and the structural lithology graph (namely geological information) to obtain a mineralized information comprehensive graph, wherein the mineralized information comprehensive graph is used for showing the plane and the space spreading characteristics of the mineralized body so as to basically determine the plane and the space spreading characteristics of the mineralized body.
S5: and (5) carrying out deep verification on the mineralized body layout drilling holes to finish the gold ore searching process.
S5 may include:
1) Arranging a measurer to measure the position of the ore body, the surface-seen engineering position and the topography line by using the RTK, determining the ore body yield, and determining the optimal drilling position by the ore body yield; the mineral body production is an important factor of the mineral body in spatial distribution, including mineral body trend, tendency, dip angle, lateral direction, lateral angle, inclination angle and the like.
2) After retesting the drilling position, a measurer drills holes at the optimal drilling position by using a modularized portable drilling machine to obtain a bedrock core; the modularized portable drilling machine is convenient to move and install, occupies small area and meets the green investigation requirement.
3) And performing core splitting sampling on the bedrock core, wherein the position of the core splitting sample is combined with a portable spectrometer, numbering is performed according to the abnormality of the arsenic element, and the sectional sampling is performed. Finally, determining the real deep extension condition and grade change of the mineralized body according to the surface engineering;
4) And performing geophysical prospecting well detection at the construction drilling position of the modularized portable drilling machine, closely detecting abnormal information and continuity of the mineralized body, evaluating the stability and continuity of the mineralized body, evaluating mineral resource potential, and guiding the construction of the next engineering.
5) And after the logging is finished, carrying out full-hole cement hole sealing on the drilled holes to finish the gold mine prospecting process.
The later verification of the embodiment adopts a modularized portable drilling machine, which meets the technical requirements of green investigation. Because the vegetation in the south Qinling mountain area is exuberant and the topography is steep, the conventional groove detection and drilling construction can damage the vegetation, water and soil loss is caused, the environmental impact is severe, the knapsack drilling and modularized portable drilling machine and other equipment are utilized, new technologies such as 'groove replacement with drilling', 'one-base multi-hole' and the like are adopted, the damage to the surface vegetation and the environmental pollution are reduced as much as possible, and meanwhile, the problems of investigation work and environmental protection in areas which are difficult to enter can be effectively considered, so that the requirements of green investigation and sustainable development are met.
The embodiment provides a gold mine rapid prospecting method with a shallow cutting coverage area in the south Qinling mountain, by refining inspection work in different stages, a portable equipment knapsack drill and a portable spectrometer are utilized to rapidly control a alteration zone, basic analysis samples are accurately taken, the operation quality and the operation efficiency are greatly improved, meanwhile, the requirements of green investigation and sustainable development are met by utilizing a modularized portable drilling machine, and the conventional prospecting thought is optimized.
The following further describes the rapid mining method used in this embodiment by way of a specific example:
a: determining a gold favorable ore forming area according to area remote sensing, geophysical prospecting and chemical prospecting data, carrying out comprehensive research aiming at a selected area, and summarizing ore deposit ore forming elements in a carding area typically Jin Kuangchuang;
b: c, carrying out 1:5 ten thousand water system sediment measurement work in the gold favorable ore-forming area selected in the step A, and simultaneously carrying out screening and checking work according to abnormal sequencing to select a key work area;
c: aiming at the key working area selected in the step B, carrying out 1:1 general geological survey, filling out a structural lithology graph, determining a mineral control structure and a mineral containing construction, collecting basic chemical samples in a strong alteration area, primarily searching mineralization clues and alteration zone trend in the area, and preferably, extracting a mining target area. In this example, according to the abnormal data of 1:5 ten thousand water system sediments in the Shaanxi ten-day area shown in fig. 3, a Wang Zhuangjin mining target area is preferably selected.
D: aiming at the Jin Zhaokuang target area selected in the step C, carrying out 1:1 ten thousand soil geochemical measurement, adopting 100m multiplied by 40m or 100m multiplied by 20m for the network degree, and arranging the mineralization alteration zone trend determined mainly according to the step C. Wang Zhuangjin the mining target area preliminarily determines an abnormal zone, and according to the characteristic, 1:1 thousands of soil geochemical measurement works are laid, in this example, 100m×40m of net degree is adopted, the soil point is laid as shown in fig. 4, and according to the measurement result, a 1:1 thousands of soil measurement unit element abnormal and comprehensive abnormal map is finally formed, and a Wang Zhuangjin geochemical map is shown in fig. 5;
e: the soil high value points generated in the step D are classified according to the abnormal values (unit: ppb) of Au and As As shown in FIG. 6: abnormal a=Au, abnormal b=As, and binary function y=f (a; b), then the 1-level check point is obtained by y1=f (a is more than or equal to 300; b is more than or equal to 600); y2=f (300 > a. Gtoreq.200; 600 > b. Gtoreq.400) is a class 2 checkpoint corresponding to the class 1 examination zone shown in FIG. 6; y3=f (200 > a. Gtoreq.100; 400 > b. Gtoreq.200) is a class 3 checkpoint corresponding to the class 2 examination zone shown in FIG. 6; y4=f (100 > a. Gtoreq.50; 200 > b. Gtoreq.100) is a class 4 checkpoint corresponding to the class 3 examination zone shown in FIG. 6; y5=f (50 > a. Gtoreq.20; 100 > b. Gtoreq.40) is a class 5 checkpoint corresponding to the class 4 examination zone shown in FIG. 6. 1. The level check point needs to find an abnormal source, the example uses a knapsack to drill a bedrock abnormal source to reveal, and simultaneously uses a portable spectrometer to determine a point on a drill core every 5cm, determine the abnormal change of As in the core column, register the position of the analysis result As with the abnormal change of more than or equal to 0.02%, and meanwhile, segment and adopt basic analysis samples (the value of the As abnormal change is more than or equal to 0.02% and less than or equal to 0.1%, the As abnormal change is more than or equal to 0.1% and less than or equal to 0.5%, and the As abnormal change is more than or equal to 0.5%), and ensure that the length meets the test quality requirement of the samples; 2. the 3-level check point needs to roughly find out an abnormal source, the 1-level check point needs to be integrated with the check point in the extending direction of the 1-level zone, other points need to respectively adopt a basic analysis sample and a spectrum sample of bedrock in the alteration zone near the abnormal source, and further work is adopted according to the result; 4. and 5, adopting a route investigation mode by the inspection point of the grade 5, adopting a basic analysis sample of a bedrock alteration zone near the abnormal source, and further carrying out the next work according to the result.
F: e, defining a mineralized body according to the result of the basic analysis sample adopted in the step E, and drawing a mineral body plane geological map;
g: f, arranging an audio magnetotelluric sounding (AMT) section perpendicular to the mineralized body trend determined in the step F, wherein the distance between the sections is 200 meters, and the point distance is 20-40 meters (the point distance between the two sides of the mineralized body within 40 meters is encrypted to be 20 meters). And performing route navigation through the GPS handset or the Beidou handheld terminal, and performing measurement along a section line. And acquiring related data, performing computer data processing to form an AMT inversion result, and determining the deep extension condition of the mineralized body by combining geological awareness. When the power ladder is selected, as can be seen from fig. 7 and 8, apparent resistivity and apparent polarization are greatly affected by the valleys, and interpretation effect and geological information are not coincident. Later, the verification is carried out by adopting an audio magnetotelluric sounding (AMT), as shown in fig. 9, the AMT inversion result shows that the depth of the mineralized body is extended to a certain extent, and the effectiveness of the AMT is reflected in accordance with the geological recognition of the area;
h: and (3) compiling an ore information comprehensive drawing, integrating physical and chemical detection data, mineralization information and geological information into a drawing, and basically determining mineralization body plane and space spreading characteristics.
I: perpendicular to the mineralized body determined in step F, H, the surveyor uses the RTK to determine the position of the body and the topography line, and the optimal borehole position is determined from the mineralized body production. Through earlier-stage related work, the spreading form of the mineralized body is determined, and as shown in fig. 10, drill holes are distributed for deep verification;
j: and retesting the drilling position by a measurer, and subsequently obtaining the bedrock core by using a modularized portable drilling machine.
K: and C, performing split sampling on the core obtained in the step I, and determining the deep extension condition of the mineralized body and the grade change of the mineralized body according to the surface engineering.
L: and D, performing geophysical prospecting well aiming at the construction drilling in the step J, closely detecting abnormal information and continuity of the mineralized body, evaluating the stability and continuity of the mineralized body, evaluating mineral resource potential, and guiding the construction of the next engineering.
M: and D, after the well logging is finished, performing full-hole cement hole sealing on the construction drilling hole in the step J.
Through the steps, the determination and verification work of the mining target area can be conveniently and efficiently completed. The quick prospecting method of the embodiment improves the prospecting efficiency and quality and solves the resource and environment problems on the premise of effectively reducing the environmental damage.
The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to assist in understanding the methods of the present invention and the core ideas thereof; also, it is within the scope of the present invention to be modified in accordance with the teachings of the present invention by those of ordinary skill in the art.
Claims (7)
1. The rapid gold ore finding method suitable for cutting shallow coverage areas in south Qin Linggao is characterized by comprising the following steps of:
performing comprehensive study on the study area to determine a Jin Zhaokuang target area;
performing 1:1 ten thousand soil geochemical measurement work in the Jin Zhaokuang target area to form a single-element anomaly map; the single element anomaly map comprises an Au anomaly map and an As anomaly map;
classifying soil high-value points by utilizing the correlation of gold and arsenic according to the Au anomaly map and the As anomaly map, sampling a basic analysis sample by utilizing a portable spectrometer according to the classification result, and defining a mineralizer based on the analysis result of the basic analysis sample; the soil high-value point is a soil result point with a gold abnormal value larger than or equal to a first preset gold abnormal value or an arsenic abnormal value larger than or equal to a first preset arsenic abnormal value in the soil result points of the 1:1 ten thousand soil geochemical measurement work;
an audio magnetotelluric sounding section is arranged perpendicular to the trend of the mineralized body, measurement is carried out along a section line, an AMT inversion result is formed, and the deep extension condition of the mineralized body is determined;
deep verification is carried out on the mineralized body layout drilling holes, and the gold ore finding process is completed;
the classifying the soil high-value points by utilizing the correlation of gold and arsenic specifically comprises the following steps of:
judging whether the gold abnormal value of the soil high-value point is larger than or equal to a second preset gold abnormal value or whether the arsenic abnormal value is larger than or equal to a second preset arsenic abnormal value, and obtaining a first judging result;
if the first judgment result is yes, the soil high value point is a 1-level check point;
if the first judgment result is negative, judging whether the gold abnormal value of the soil high-value point is larger than or equal to a third preset gold abnormal value or whether the arsenic abnormal value is larger than or equal to the third preset arsenic abnormal value, and obtaining a second judgment result; the third preset gold anomaly value is smaller than the second preset gold anomaly value; the third preset arsenic anomaly value is smaller than the second preset arsenic anomaly value;
if the second judgment result is yes, the soil high value point is a grade 2 check point;
if the second judgment result is negative, judging whether the gold abnormal value of the soil high-value point is larger than or equal to a fourth preset gold abnormal value or whether the arsenic abnormal value is larger than or equal to a fourth preset arsenic abnormal value, and obtaining a third judgment result; the fourth preset gold anomaly value is less than the third preset gold anomaly value; the fourth preset arsenic anomaly value is smaller than the third preset arsenic anomaly value;
if the third judgment result is yes, the soil high value point is a 3-level check point;
if the third judgment result is negative, judging whether the gold abnormal value of the soil high-value point is larger than or equal to a fifth preset gold abnormal value or whether the arsenic abnormal value is larger than or equal to a fifth preset arsenic abnormal value, and obtaining a fourth judgment result; the fifth preset gold anomaly value is less than the fourth preset gold anomaly value; the fifth preset arsenic anomaly value is smaller than the fourth preset arsenic anomaly value;
if the fourth judgment result is yes, the soil high value point is a 4-level check point;
if the fourth judgment result is negative, the soil high value point is a 5-level check point;
specifically, the first preset gold anomaly value is 20ppb, and the first preset arsenic anomaly value is 40ppb; the second predetermined gold anomaly value is 300ppb and the second predetermined arsenic anomaly value is 600ppb; the third predetermined gold anomaly value is 200ppb, and the third predetermined arsenic anomaly value is 400ppb; the fourth preset gold anomaly value is 100ppb, and the fourth preset arsenic anomaly value is 200ppb; the fifth preset gold anomaly value is 50ppb, and the fifth preset arsenic anomaly value is 100ppb; classifying the soil high value points according to the abnormal values of Au and As can comprise: abnormal a=Au, abnormal b=As, and when the binary function y=f (a; b) exists, the 1-level check point is defined As y1=f (a is more than or equal to 300; b is more than or equal to 600); y2=f (300 > a. Gtoreq.200; 600 > b. Gtoreq.400) is a class 2 checkpoint; y3=f (200 > a. Gtoreq.100; 400 > b. Gtoreq.200) is a class 3 checkpoint; y4=f (100 > a. Gtoreq.50; 200 > b. Gtoreq.100) is a class 4 checkpoint; y5=f (50 > a. Gtoreq.20; 100 > b. Gtoreq.40) is a class 5 checkpoint;
according to the classification result, sampling by using the portable spectrometer specifically comprises:
for the grade 1 check point, performing bedrock drilling by using a knapsack drill, determining a plurality of measurement points on a drilling core along the drilling depth direction based on a preset length, and determining an arsenic abnormal change value of each measurement point by using the portable spectrometer; performing sectional sampling according to the arsenic abnormal change value to obtain a plurality of basic analysis samples corresponding to the grade 1 check point; specifically, after determining the As abnormal change value in the columnar drill core, registering the position of the analysis result As abnormal change value which is more than or equal to 0.02%, simultaneously carrying out segmentation and sampling on basic analysis samples, and carrying out segmentation and sampling on the basic analysis samples according to the segmentation ranges of the As abnormal change value which is more than or equal to 0.02% and less than 0.1%, the As abnormal change value which is more than or equal to 0.1% and less than or equal to 0.5% and the As abnormal change value, wherein the length meets the test quality requirement of the samples, and adopting a split sampling mode when sampling, namely splitting the columnar drill core into two halves, and taking half As the basic analysis samples;
judging whether the class 2 check point or the class 3 check point is in the extending direction of the mineralization alteration zone where the class 1 check point is located for the class 2 check point and the class 3 check point; if yes, sampling the 2-level check point or the 3-level check point in a sampling mode of the 1-level check point to obtain a plurality of basic analysis samples corresponding to the 2-level check point or the 3-level check point; if not, sampling on a mineralization alteration zone around the grade 2 check point or the grade 3 check point to obtain a plurality of basic analysis samples or spectrum samples corresponding to the grade 2 check point or the grade 3 check point, wherein the basic analysis samples are quantitative samples, and the spectrum samples belong to semi-quantitative samples; the sampling mode of the 2-level check point or the 3-level check point is as follows: for the exposed better sections of the bedrock, the main sections are engraved samples, and the rest sections are mainly picked up block samples;
sampling the 4-level check point and the 5-level check point on a mineralization alteration zone around the 4-level check point or the 5-level check point to obtain a plurality of basic analysis samples or spectrum samples corresponding to the 4-level check point or the 5-level check point; the sampling mode of the 4-level check point or the 5-level check point is as follows: checking a block sample;
the mineralization body layout drilling is subjected to deep verification, and the ore finding process for completing gold ore specifically comprises the following steps:
determining the mineral body position, the surface mineral engineering position and the topography line by using RTK, determining the mineral body shape, and determining the optimal drilling position by the mineral body shape;
drilling holes at the optimal drilling positions by using a modularized portable drilling machine to obtain a bedrock core;
performing split sampling on the bedrock core, and determining the real deep extension condition and grade change of the mineralized body according to surface engineering;
performing geophysical prospecting well at the drilling position, detecting abnormal information and continuity of the mineralized body, evaluating stability and continuity of the mineralized body, and evaluating mineral resource potential;
and (3) carrying out full-hole cement hole sealing on the drilled holes to finish the prospecting process of the gold mine.
2. The method for rapidly searching for gold ore suitable for cutting shallow coverage areas in south Qin Linggao according to claim 1, wherein the performing of comprehensive research on the research area, determining Jin Zhaokuang the target area specifically comprises:
determining a gold favorable ore formation area through regional remote sensing data, geophysical prospecting data and chemical prospecting data of a research area;
carrying out 1:5 ten thousand water system sediment measurement work in the gold favorable ore formation area, and determining a key work area;
and carrying out 1:1 ten thousand geological surveys in the key working area to determine a Jin Zhaokuang target area.
3. A rapid gold mining method suitable for cutting shallow coverage areas in south Qin Linggao according to claim 2, wherein prior to determining the gold favorable mining area, the rapid mining method further comprises: developing comprehensive research on the research area, carding typical Jin Kuangchuang in the research area, summarizing ore deposit ore-forming elements, and obtaining gold mineralization alteration characteristics in the area; the gold mineralization alteration feature in the zone is used to assist in the gold mine prospecting process.
4. The method for rapidly searching gold ore suitable for cutting shallow coverage areas in south Qin Linggao according to claim 2, wherein the step of performing 1:1 ten thousand geological surveys in the key working area to determine Jin Zhaokuang target areas specifically comprises:
developing 1:1 ten thousand special geological surveys in the key working area, and filling out a structural lithology graph;
determining a region of intense alteration from the tectonic lithology map;
and collecting a basic chemical sample at the strong alteration area, determining the trend of a mineralization alteration zone according to the analysis result of the basic chemical sample, and determining a Jin Zhaokuang target area.
5. The method for rapidly finding gold ore suitable for shallow coverage area cut by south Qin Linggao according to claim 4, wherein when carrying out 1:1 ten thousand soil geochemical measurement work in the Jin Zhaokuang target area, the net degree is 100m×40m or 100m×20m, and the distribution of soil result points is carried out according to the trend of the mineralization zone.
6. A rapid gold mining method suitable for shallow coverage cut by south Qin Linggao according to claim 1, wherein the sampling is performed sequentially in order from the grade 1 checkpoint to the grade 5 checkpoint.
7. A method of rapid gold mining applicable to shallow coverage cut by south Qin Linggao as claimed in claim 4, further comprising, after determining the depth extension of the mineralized body:
combining the geophysical prospecting data, the chemical prospecting data, the position and deep extension condition of the mineralized body and the structural lithology graph into a graph to obtain a comprehensive graph of the mineralized body information; the mineralization information comprehensive graph is used for showing the plane and space spreading characteristics of the mineralization body.
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