CN118276177A - Hidden carbonate type lead zinc ore prospecting method based on target area prediction - Google Patents
Hidden carbonate type lead zinc ore prospecting method based on target area prediction Download PDFInfo
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- JQJCSZOEVBFDKO-UHFFFAOYSA-N lead zinc Chemical compound [Zn].[Pb] JQJCSZOEVBFDKO-UHFFFAOYSA-N 0.000 title claims abstract description 118
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 title claims abstract description 73
- 238000000034 method Methods 0.000 title claims abstract description 56
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 42
- 239000011707 mineral Substances 0.000 claims abstract description 42
- 238000005065 mining Methods 0.000 claims abstract description 27
- 239000000126 substance Substances 0.000 claims abstract description 11
- 238000010276 construction Methods 0.000 claims description 87
- 230000015572 biosynthetic process Effects 0.000 claims description 81
- 239000011435 rock Substances 0.000 claims description 73
- 238000009826 distribution Methods 0.000 claims description 31
- 238000011160 research Methods 0.000 claims description 25
- 238000012360 testing method Methods 0.000 claims description 21
- 238000004458 analytical method Methods 0.000 claims description 20
- 230000033558 biomineral tissue development Effects 0.000 claims description 20
- 230000009286 beneficial effect Effects 0.000 claims description 17
- 230000002349 favourable effect Effects 0.000 claims description 12
- 238000005553 drilling Methods 0.000 claims description 11
- 238000012545 processing Methods 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 9
- 238000012795 verification Methods 0.000 claims description 9
- 238000011835 investigation Methods 0.000 claims description 7
- 238000001095 inductively coupled plasma mass spectrometry Methods 0.000 claims description 5
- 230000000052 comparative effect Effects 0.000 claims description 4
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 229910052721 tungsten Inorganic materials 0.000 claims description 4
- 238000012876 topography Methods 0.000 claims description 3
- 208000010392 Bone Fractures Diseases 0.000 description 27
- 206010017076 Fracture Diseases 0.000 description 27
- 238000005070 sampling Methods 0.000 description 6
- 235000019738 Limestone Nutrition 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000006028 limestone Substances 0.000 description 5
- 238000011161 development Methods 0.000 description 4
- 230000018109 developmental process Effects 0.000 description 4
- 239000010459 dolomite Substances 0.000 description 4
- 229910000514 dolomite Inorganic materials 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 230000004075 alteration Effects 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000013508 migration Methods 0.000 description 3
- 230000005012 migration Effects 0.000 description 3
- 230000007480 spreading Effects 0.000 description 3
- 238000003892 spreading Methods 0.000 description 3
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 2
- 238000002441 X-ray diffraction Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 229910052745 lead Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- LWEFXXKXNDENJB-UHFFFAOYSA-N [O].[C].[Sr] Chemical compound [O].[C].[Sr] LWEFXXKXNDENJB-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- 229910001748 carbonate mineral Inorganic materials 0.000 description 1
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 1
- 229910052956 cinnabar Inorganic materials 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000007621 cluster analysis Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000009189 diving Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000000556 factor analysis Methods 0.000 description 1
- 229910052949 galena Inorganic materials 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- XCAUINMIESBTBL-UHFFFAOYSA-N lead(ii) sulfide Chemical compound [Pb]=S XCAUINMIESBTBL-UHFFFAOYSA-N 0.000 description 1
- 239000002366 mineral element Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
Abstract
The invention provides a hidden carbonate type lead-zinc ore prospecting method based on target area prediction, and relates to the technical field of mineral resource exploration. The mining working modes of conventional geology, geophysical prospecting, chemical prospecting and remote sensing work are avoided, the workload is greatly reduced, the exploration cost is greatly reduced, and the working efficiency is improved.
Description
Technical Field
The invention relates to the technical field of mineral resource exploration, in particular to a hidden carbonate type lead zinc ore prospecting method based on target area prediction.
Background
Carbonate type lead zinc ore is one of the most important lead zinc ore deposit types in the world, provides about 17% of lead zinc metal reserves for the world, is formed in a front continental rise starting area of the front edge of a diving plate, is used for driving high-salinity basin fluid to move under certain structural events, extracts ore-forming elements such as lead zinc in surrounding rock and base rock construction, and the like, unloads ore in favorable ore-forming spaces, and deposits are reserved in basin edge shallow bench-type carbonate construction. The lead zinc ore is not only a production raw material of lead and zinc, but also an important raw material for the strategic key metal production of industrial germanium, gallium, indium and the like, and has great development and utilization values.
The former summarizes the prospecting methods of various lead-zinc ores, namely a method for prospecting carbonate type lead-zinc ore deposit, which judges the migration path of the mineral forming fluid of the carbonate type lead-zinc ore deposit according to the rare earth geochemical index and the carbon-oxygen-strontium isotope geochemical index of carbonate minerals of key prospecting marks, and realizes the economy and the high efficiency of the potential evaluation and the ore right decision of the carbonate type lead-zinc ore deposit. The hidden lead zinc ore prospecting method adopts geology and geophysical prospecting method to realize searching of hidden lead zinc ore prospecting target area by identifying the lead zinc ore bearing rock system based on the existing research result. The 'Mississippi lead-zinc deposit prospecting prediction method' is based on four factors of stratum, lithology, structure and alteration mineralization, and can gradually and rapidly reduce the range of a prospecting working area. The MVT lead-zinc ore deposit prospecting prediction method based on X-ray diffraction adopts MVT lead-zinc ore deposit surrounding rock carbonate rock to carry out X-ray diffraction scanning, and MDI Jade software is utilized to carry out phase retrieval and quantitative analysis, so that MVT lead-zinc ore deposit prospecting prediction is realized.
At present, a corresponding geological, geophysical prospecting, chemical prospecting and remote sensing comprehensive prospecting method is established for the hidden ore deposit, and good prospecting effect is obtained, but the method has some defects. In actual investigation work, because the carbonate type lead-zinc ore deposit contains a plurality of ore layers, because the understanding of key ore formation and control factors of the carbonate type lead-zinc ore deposit is lacking, the target area is optimized and the drilling verification is lack of scientific and reasonable planning, the investment of the investigation work is increased, the efficiency is low, and great risks are brought to the investigation work.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a hidden carbonate type lead zinc ore prospecting method based on target area prediction.
In order to achieve the above object, the present invention provides the following solutions:
a hidden carbonate type lead zinc ore prospecting method based on target area prediction, comprising:
Carrying out research on the ore formation rule of carbonate type lead zinc ores in the target area to determine an ore formation remote scenic spot;
according to rock construction and construction characteristics and lead-zinc mineralization information of the ore-forming remote scenic spot, inverting the control relation of the construction evolution process on carbonate type lead-zinc ores, and identifying key ore-forming control factors so as to select an ore-forming beneficial area of the lead-zinc ores;
Collecting structural geochemical samples in the ore-forming favorable region, quantitatively testing by adopting an ICP-MS analysis method to obtain sample test data, and carrying out ore-bearing analysis of the ore-forming structure on the sample test data so as to capture mineralization information of the deep ore-forming structure;
collecting audio magnetotelluric sounding data in the mining beneficial region, processing and inverting the collected data, and interpreting the mineral rock construction space distribution characteristics to finely analyze the mineral construction space distribution characteristics;
And comprehensively analyzing according to the mineralization information of the deep ore forming structure and the spatial distribution characteristics of the ore forming structure so as to outline a deep lead-zinc mining target area.
Preferably, after comprehensively analyzing according to the mineralization information of the deep ore formation and the spatial distribution characteristics of the ore formation so as to define a deep lead-zinc mining target area, the method further comprises:
and carrying out deep drilling verification on the deep lead-zinc mining target area.
Preferably, the carbonate type lead zinc ore formation rule research is performed on the target area to determine an ore formation remote scenic spot, including:
obtaining result data; the achievement data comprises: basic geology, geophysical prospecting, chemical prospecting, mineral products, scientific research and papers of areas and mining areas;
According to the result data, carrying out research on the ore formation rule of carbonate type lead zinc ores in the target area so as to determine an ore formation remote scenic spot; the mine-forming distant party comprises: the coupling part of the fracture structural band at the edge of the subsidence basin and the carbonate rock construction distribution area, the known ore formation area, the existing controlled ore fracture structural band and the periphery and deep part of the large and medium-sized ore deposit.
Preferably, after conducting a carbonate type lead zinc ore formation rule study on the target area to determine an ore formation prospect, the method further comprises:
on the basis of the research on the ore formation rule of the carbonate type lead zinc ore, regional mineral investigation is carried out, the contact relation between rock construction, structure, magma rock and fracture edge related to ore formation is ascertained, the construction characteristics of the fracture edge and the rock in the fracture basin are known, and a regional ore formation rule series chart is compiled by combining the ore body output characteristics.
Preferably, the inversion construction evolution process includes: the fractured basin prototype is restored and the reverse thrust tectorial system is restored.
Preferably, the key mineforming control factors include: fracture structure of the edge of the subsidence basin and construction of the inner side of the basin and the overlying carbonate rock.
Preferably, the mineralisation zone comprises a high angle normal fault fracturing the edge of the basin and its inboard and overlying carbonate formation distribution zone.
Preferably, the test items of constructing the geochemical sample include: pb, zn, ag, cd, as, sb, cu, co, ni, cr, W, sn, mo, bi elements.
Preferably, audio magnetotelluric sounding data is acquired in the mineralisation facilitating region and the acquired data is processed and inverted to interpret the mineralisation rock construction space layout features for fine resolution into mineralisation construction space layout features, comprising:
the self-checking and the calibration of the magnetic rod are carried out by a V8-6R multifunctional electric instrument so as to ensure the good working state of the instrument;
The method comprises the steps of utilizing an instrument to collect data, processing the collected data, and utilizing inversion software to invert the nonlinear conjugate gradient of the one-dimensional Occam-TE+two-dimensional TM with the topography;
And (3) establishing a target area rock construction-structure-electrical model through comparative interpretation, interpreting the target area construction grid and the rock construction structure, and finely resolving the target area construction grid and the rock construction structure into the spatial distribution characteristics of the deep structural surface of the mineral construction to form an interpretation graph.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
The invention provides a hidden carbonate type lead zinc ore prospecting method based on target area prediction, which comprises the following steps: carrying out research on the ore formation rule of carbonate type lead zinc ores in the target area to determine an ore formation remote scenic spot; according to rock construction and construction characteristics and lead-zinc mineralization information of the ore-forming remote scenic spot, inverting the control relation of the construction evolution process on carbonate type lead-zinc ores, and identifying key ore-forming control factors so as to select an ore-forming beneficial area of the lead-zinc ores; collecting structural geochemical samples in the ore-forming favorable region, quantitatively testing by adopting an ICP-MS analysis method to obtain sample test data, and carrying out ore-bearing analysis of the ore-forming structure on the sample test data so as to capture mineralization information of the deep ore-forming structure; collecting audio magnetotelluric sounding data in the mining beneficial region, processing and inverting the collected data, and interpreting the mineral rock construction space distribution characteristics to finely analyze the mineral construction space distribution characteristics; and comprehensively analyzing according to the mineralization information of the deep ore forming structure and the spatial distribution characteristics of the ore forming structure so as to outline a deep lead-zinc mining target area. The invention adopts a method of ' fine analysis of an ore formation, exploration of deep ore control structure information and structure geochemical measurement ', analysis of geochemical mineral content of a deep ore formation ', and determination of a deep lead-zinc exploration target area, and exploration of a hidden carbonate type lead-zinc ore deposit controlled by combination of carbonate rock construction and fracture. The mining working modes of conventional geology, geophysical prospecting, chemical prospecting and remote sensing work are avoided, the workload is greatly reduced, the exploration cost is greatly reduced, and the working efficiency is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that 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 according to an embodiment of the present invention;
FIG. 2 is a simplified geological map of a target area provided by an embodiment of the present invention;
FIG. 3 is a geological structure diagram of a target area according to an embodiment of the present invention;
FIG. 4 is a geochemical cross-sectional view of a target area according to an embodiment of the present invention;
FIG. 5 is a diagram of a target area audio magnetotelluric sounding comprehensive interpretation result provided by an embodiment of the present invention;
Fig. 6 is a combined cross-sectional view of a target zone ore body provided in an embodiment 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 hidden carbonate type lead zinc ore prospecting method based on target area prediction, which can greatly reduce the workload, greatly reduce the exploration cost and improve the working efficiency.
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.
Fig. 1 is a flowchart of a method provided by an embodiment of the present invention, and as shown in fig. 1, the present invention provides a method for searching for lead zinc ores of hidden carbonate type based on target area prediction, including:
Step 100: carrying out research on the ore formation rule of carbonate type lead zinc ores in the target area to determine an ore formation remote scenic spot;
step 200: according to rock construction and construction characteristics and lead-zinc mineralization information of the ore-forming remote scenic spot, inverting the control relation of the construction evolution process on carbonate type lead-zinc ores, and identifying key ore-forming control factors so as to select an ore-forming beneficial area of the lead-zinc ores;
Step 300: collecting structural geochemical samples in the ore-forming favorable region, quantitatively testing by adopting an ICP-MS analysis method to obtain sample test data, and carrying out ore-bearing analysis of the ore-forming structure on the sample test data so as to capture mineralization information of the deep ore-forming structure;
Step 400: collecting audio magnetotelluric sounding data in the mining beneficial region, processing and inverting the collected data, and interpreting the mineral rock construction space distribution characteristics to finely analyze the mineral construction space distribution characteristics;
Step 500: and comprehensively analyzing according to the mineralization information of the deep ore forming structure and the spatial distribution characteristics of the ore forming structure so as to outline a deep lead-zinc mining target area.
Preferably, after comprehensively analyzing according to the mineralization information of the deep ore formation and the spatial distribution characteristics of the ore formation to define a deep lead-zinc mining target area, the method further comprises:
and carrying out deep drilling verification on the deep lead-zinc mining target area.
Specifically, the embodiment adopts a method of 'fine analysis of an ore formation structure and analysis of the mineral content of geochemistry', a deep lead-zinc prospecting target area is defined, and a hidden carbonate type lead-zinc deposit controlled by the combination of carbonate rock construction and fracture is prospected, wherein the prospecting method comprises the following steps:
(1) Collecting data, developing a pre-study
And (5) developing the research on the ore forming rule of carbonate type lead zinc ore, and determining an ore forming remote scenic spot.
(2) Determining key ore forming control factors and selecting lead zinc ore forming beneficial areas
And according to the rock construction and construction characteristics of the mine-forming distant region and the lead-zinc mineralization information, inverting the control relation of the construction evolution process on the carbonate type lead-zinc ores, identifying key mine-forming control factors and selecting a lead-zinc ore-forming favorable region.
(3) Capturing mineralization information of deep mineralization structure
In an advantageous ore formation area, collecting structural geochemical samples, quantitatively testing by adopting an ICP-MS analysis method, carrying out ore-bearing analysis of ore formation on sample test data, and capturing mineralization information of deep ore formation.
(4) Exploring deep mine control structure information
In an advantageous ore formation area, audio magnetotelluric sounding (AMT) data are acquired, the acquired data are processed and inverted, and the mineral rock construction space layout features are interpreted and finely resolved into the mineral construction space layout features.
(5) Comprehensive analysis, delineating deep lead-zinc prospecting target area
(6) Deep drilling verification.
Preferably, the carbonate type lead zinc ore formation rule research is performed on the target area to determine an ore formation remote scenic spot, including:
obtaining result data; the achievement data comprises: basic geology, geophysical prospecting, chemical prospecting, mineral products, scientific research and papers of areas and mining areas;
According to the result data, carrying out research on the ore formation rule of carbonate type lead zinc ores in the target area so as to determine an ore formation remote scenic spot; the mine-forming distant party comprises: the coupling part of the fracture structural band at the edge of the subsidence basin and the carbonate rock construction distribution area, the known ore formation area, the existing controlled ore fracture structural band and the periphery and deep part of the large and medium-sized ore deposit.
Preferably, after conducting a carbonate type lead zinc ore formation rule study on the target area to determine an ore formation prospect, the method further comprises:
on the basis of the research on the ore formation rule of the carbonate type lead zinc ore, regional mineral investigation is carried out, the contact relation between rock construction, structure, magma rock and fracture edge related to ore formation is ascertained, the construction characteristics of the fracture edge and the rock in the fracture basin are known, and a regional ore formation rule series chart is compiled by combining the ore body output characteristics.
Specifically, the previous achievement data include: basic geology, geophysical prospecting, chemical prospecting, mineral products, scientific research, papers and the like of the area and the mining area. The ore forming rule research in the step (1) specifically comprises the following steps: and (5) researching regional geological mineral characteristics, primarily analyzing the ore forming rule, and determining an ore forming remote scenic spot. The step (1) of determining the mine forming distant view zone comprises the coupling part of the fracture structural zone at the edge of the subsidence basin and the carbonate rock construction distribution zone, wherein the mine forming zone is known, and the fracture structural zone of the existing mine control, the periphery and the deep part of the large and medium-sized ore deposit are formed. The research content comprises the steps of carrying out regional mineral investigation on the basis of the research of the ore formation rule, finding out the contact relation between rock construction, structure, magma rock and fracture edge related to ore formation, knowing the construction characteristics of the fracture edge and rock in the fracture basin, and compiling a regional ore formation rule series chart by combining the ore body output characteristics.
Preferably, the inversion construction evolution process includes: the fractured basin prototype is restored and the reverse thrust tectorial system is restored.
Preferably, the key mineforming control factors include: fracture structure of the edge of the subsidence basin and construction of the inner side of the basin and the overlying carbonate rock.
Preferably, the mineralisation zone comprises a high angle normal fault fracturing the edge of the basin and its inboard and overlying carbonate formation distribution zone.
Preferably, the test items of constructing the geochemical sample include: pb, zn, ag, cd, as, sb, cu, co, ni, cr, W, sn, mo, bi elements.
Specifically, the step (2) specifically includes the following steps: and developing a geological map special for 1:10000 lithology structural alteration in an ore-forming beneficial region, and finding out the lithology construction and ore-forming and ore-controlling structural characteristics related to lead-zinc ore formation.
Further, the carbonate type lead zinc ore forming condition in the step (2) comprises: high porosity carbonates such as subsidence basin edge, normal fault and limestone, dolomite limestone, and dolomite are built.
Further, the inversion construction evolution described in step (2) involves fracture basin prototype restoration and thrust covered construction system restoration.
Further, the key mineralisation control factor described in step (2) relates to the fractured formation of the fractured basin edge and its inboard and overburden carbonate formation.
Further, the diagenetic beneficial zone in step (2) includes a high angle normal fault fracturing the basin edge and its inboard and overlying carbonate rock build distribution zone.
Preferably, audio magnetotelluric sounding data is acquired in the mineralisation facilitating region and the acquired data is processed and inverted to interpret the mineralisation rock construction space layout features for fine resolution into mineralisation construction space layout features, comprising:
the self-checking and the calibration of the magnetic rod are carried out by a V8-6R multifunctional electric instrument so as to ensure the good working state of the instrument;
The method comprises the steps of utilizing an instrument to collect data, processing the collected data, and utilizing inversion software to invert the nonlinear conjugate gradient of the one-dimensional Occam-TE+two-dimensional TM with the topography;
And (3) establishing a target area rock construction-structure-electrical model through comparative interpretation, interpreting the target area construction grid and the rock construction structure, and finely resolving the target area construction grid and the rock construction structure into the spatial distribution characteristics of the deep structural surface of the mineral construction to form an interpretation graph.
The geochemical sample collection range of the structure in the step (3) comprises a mineral body, fault and fracture development positions and fracture structure non-development sections, the sample collection is mainly performed by fault breccia and altered rock, and a multi-point mixed sample non-crossing lithology collection mode is adopted.
Further, the test item of the constructed geochemical sample in the step (3) comprises Pb, zn, ag, cd, as, sb, cu, co, ni, cr, W, sn, mo, bi and other elements.
Further, the data processing and analysis in the step (3) comprises element content parameter statistics, element combination analysis, factor analysis and cluster analysis. And calculating an anomaly lower limit by taking an average value of five substitutions of the anomaly value as a background value, and compiling a geochemistry anomaly map by utilizing Surfer software. And carrying out mineral analysis on the mineral formation by combining the spatial distribution characteristics of the mineral rock formation and the mineral formation, and determining the comprehensive abnormal characteristics through comprehensive analysis of element geochemistry abnormality and geological geochemistry.
Further, the step (4) specifically includes the following steps:
and (3) developing audio magnetotelluric sounding in the lead-zinc ore-forming beneficial area selected in the second step, and firstly, checking by a V8-6R multifunctional electric instrument and calibrating a magnetic rod, thereby ensuring good working state of the instrument.
The acquired data is processed, and inversion is performed on a 'one-dimensional Occam-TE+two-dimensional TM' terrain nonlinear conjugate gradient (NLCG) by using MTsoft D (version 2.4) inversion software developed by Chengdu university.
And (3) establishing a target area rock construction-structure-electrical model through comparative interpretation, interpreting the target area construction grid and the rock construction structure, and finely resolving the target area construction grid and the rock construction structure into the spatial distribution characteristics of the deep structural surface of the mineral construction to form an interpretation graph.
Further, the step (5) specifically includes the following steps: and (3) on the basis of the steps (1), (2), (3) and (4), synthesizing the rock construction, the ore formation and the spatial distribution characteristics of ore bodies, and carrying out comprehensive research by combining geophysical prospecting and chemical prospecting with the presumed interpretation information.
Further, comprehensively analyzing fracture structure evolution, mineral rock construction, space distribution characteristics of the formed mineral structures and possible migration and positioning characteristics of the formed mineral fluids, combining geochemistry anomaly and audio magnetotelluric sounding interpretation results, carrying out forward modeling and inversion speculation mutual verification, predicting the space distribution of the hidden lead-zinc ore bodies, and enclosing a deep lead-zinc mining target area.
Further, the step (6) specifically includes the following steps: and (5) preferentially arranging drilling holes in the defined deep lead-zinc mining target area in the step (5), and carrying out verification of the deep drilling holes.
The following describes the scheme of the invention in detail with reference to a mining array of a pig arch pool hidden ultra-large lead-zinc ore deposit in Hezhang county in Guizhou province.
The first step: the data of geology, geophysical prospecting, chemical prospecting, mineral products, scientific research, paper and the like are collected, and a pre-study is developed.
Based on research and knowledge of the ore formation rule of carbonate type lead zinc ore, all-python-chamber ore formation far scenic spots in the northwest of Guizhou, which are favorable for ore formation are selected to be deployed for prospecting, the far scenic spots are located in the northwest of the water-city broken basin, the northwest of Qian lead zinc multi-metal ore formation areas of Sichuan Yunnan, the northwest of Qian lead zinc ore formation areas are found to have large-and ultra-large lead zinc ore beds such as Yunnan Huize, zhaotong Mao Ping, sichuan girder, tianbao mountain and the like, the northwest of Qian lead zinc ore formation areas are provided with overpass, , the middle-sized lead zinc ore beds such as Zhi-qin-chamber, all-python-chamber ore formation far scenic spots are located in the northwest of the water-city broken basin, and the developing pot-carbo carbonate rock is built and all-python-chamber are broken (fig. 2), and the favorable ore formation marks describe better geological conditions of carbonate type lead zinc ore formation in the areas.
And a second step of: in all-python ore-forming remote scenic spots, a pig arch pool lead-zinc ore-forming beneficial area is selected to develop a 1:10000 lithology structure alteration special geological map, and geological structure characteristics related to ore forming are ascertained. The late ancient open-land ground phase limestone, dolomite limestone and dolomite in the area are built by a set of carbonate rocks with higher porosity, and are favorable rock building for lead-zinc ore formation in the area (figure 3). The fracture bandwidth of a reverse-flushing fault (F2) fault of a cinnabar factory is 5-60 m, the reverse-flushing fault consists of fault gravel, fault mud, broken rock and limestone lens bodies, and the lithology of the clay-pot-shaped to carbolic-shaped stratum on two sides of the fault is greatly changed. The F2 lower disc ore body is layered and lens-shaped, is intersected with the surrounding rock layer at a small angle, has good integrity and continuity, and is not damaged obviously after ore formation; the F2 fault fracture zone and the upper tray ore body are mostly in pulse shape to form angular gravel-shaped and block-shaped ores, the galena angular gravel has extrusion line arrangement, the contact boundary between the ore-containing angular gravel and surrounding rock is clear, the lead-zinc mineralized body can be clearly seen to be broken, and the lead-zinc mineralized body is cemented by argillaceous substances, and the influence of later-stage damage events is obvious. The F2 fault is a high-angle positive fault in the early stage and a reverse impact fault in the later stage, the early stage has obvious rock and ore control effect, and the later stage has the characteristic of destroying ore bodies. And identifying that the carbonate rock construction and high-angle normal fault on the inner side of the subsidence basin and overlying carbonate rock are key ore forming control factors for controlling lead zinc ore formation through inversion construction evolution process on the control relation of carbonate rock type lead zinc ore.
And a third step of: the method comprises the steps of selecting an ore-forming favorable section according to key ore-forming control factors for controlling lead-zinc ore formation in a pig arch pond lead-zinc ore-forming beneficial region, carrying out geochemical profile sampling and testing according to DZ/T0248-2014 specification of rock geochemical measurement technical specification, sampling 5-20 m at intervals at development positions of ore bodies, faults and cracks, sampling 20-50 m at intervals at sections with weak ore-forming effect, taking fault breccia and altered rock as sampling media, taking lithology changes into consideration, taking multipoint mixed samples in a certain range at the same sampling point without crossing lithology collection, and completing 25Km sampling and testing of the geochemical profile, wherein 820 samples are collected.
The geochemistry anomaly map is compiled by utilizing Surfer software through sample test data processing, and through element geochemistry anomaly and geological geochemistry section comprehensive analysis, a multi-element comprehensive anomaly distributed in North west direction is formed by main mineral element Zn, pb, ag, cu and dispersive elements Ag, sb and Cd, the anomaly area is large, the continuity is good, the anomaly gradient change is large, the concentration center is clear, and the multi-element comprehensive anomaly is well sleeved with the anomaly of leading edge corona elements Pb, sb and Ag (figure 4).
Fourth step: in a pig arch pond lead-zinc ore formation beneficial region, according to lead-zinc ore formation geological conditions and with the combination of geochemistry anomaly, an ore formation beneficial region is selected to develop audio magnetotelluric sounding (AMT), a V8-6R multifunctional electric method instrument is adopted to develop field data acquisition work according to the DZ/T0305-2017 specification of the technical regulations of the natural field audio magnetotelluric method, and before field data acquisition, the field data acquisition work is carried out through the self-inspection of the V8-6R multifunctional electric method instrument and the calibration of a magnetic rod, so that the working state of the instrument is ensured to be good, and after each parameter is confirmed to be correct, the field data acquisition work is carried out.
The induction type electric method using natural field as source for audio magnetotelluric sounding has the characteristics of rich acquisition frequency, large detection depth, no high resistance shielding, high low resistance resolution, high working efficiency, small influence on terrain and the like, can effectively determine the burial depths and spatial spreading of different rock constructions in a target area, can better reflect the extension characteristics of the construction to the deep part, and finely delineates the morphology and spatial spreading of the structural surface of the ore formation in the research of the ore formation.
The prospecting lines of Chenjiazhai ore sections 52, 101 and 104 are selected in the favorable region of pig arch pool lead zinc ore formation, are respectively 3Km, and are used for carrying out audio magnetotelluric sounding measurement, so that the overall measuring effect is good, and the sounding requirement can be met. The MTsoft D (version 2.4) inversion software developed by Du Ji university is selected to carry out an inversion method of 'one-dimensional Occam-TE+two-dimensional TM' with a topographic nonlinear conjugate gradient (NLCG), and the optimal inversion parameters are determined. The inversion result shows that the shallow part has obvious transverse change, the deep part has better layering property, the construction of the basalt in the Emei mountain and the construction of the carbonate rock in the clay pot and the carbolic acid are in the middle-high resistance electric characteristic, the construction of the clastic rock in the volunteer and the binary Longtan sets and the beam mountain sets is in the low resistance electric characteristic, the electric resistivity contour lines are transversely discontinuous, the form of a fracture structure is regularly reflected, particularly, the faults of the ore control structures F1 and F2 have shallow part high angle and deep part gradual space spreading characteristics, and the consistency with drilling verification is better (figure 5).
Fifth step: by arranging geology, geophysical prospecting and chemical prospecting measurement, the evolution of a fracture structure, the construction of mineral rocks, the spatial arrangement characteristics of a mineral formation structure and the possible migration and positioning characteristics of mineral formation fluid are comprehensively analyzed, and the spatial distribution of a hidden lead-zinc ore body is predicted by combining geochemistry anomaly and audio magnetotelluric sounding interpretation results to define a deep lead-zinc prospecting target area.
Sixth step: and selecting the most favorable deep lead-zinc mining target area to lay drilling holes, and carrying out deep drilling hole verification.
The deep lead-zinc mining target area defined by the method provided by the invention is verified by deep drilling, a hidden thick lead-zinc ore body (figure 6) is found in a lead-zinc mining beneficial area of the Qian northbound pig arch pond, the first hidden ultra-large lead-zinc ore deposit in Guizhou is found by systematic exploration, and the lead-zinc resource amount is 327 ten thousand tons, so that the important breakthrough of lead-zinc mining is realized. The method for finding ores proves to be effective.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
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 by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (9)
1. The hidden carbonate type lead zinc ore prospecting method based on target area prediction is characterized by comprising the following steps of:
Carrying out research on the ore formation rule of carbonate type lead zinc ores in the target area to determine an ore formation remote scenic spot;
according to rock construction and construction characteristics and lead-zinc mineralization information of the ore-forming remote scenic spot, inverting the control relation of the construction evolution process on carbonate type lead-zinc ores, and identifying key ore-forming control factors so as to select an ore-forming beneficial area of the lead-zinc ores;
Collecting structural geochemical samples in the ore-forming favorable region, quantitatively testing by adopting an ICP-MS analysis method to obtain sample test data, and carrying out ore-bearing analysis of the ore-forming structure on the sample test data so as to capture mineralization information of the deep ore-forming structure;
collecting audio magnetotelluric sounding data in the mining beneficial region, processing and inverting the collected data, and interpreting the mineral rock construction space distribution characteristics to finely analyze the mineral construction space distribution characteristics;
And comprehensively analyzing according to the mineralization information of the deep ore forming structure and the spatial distribution characteristics of the ore forming structure so as to outline a deep lead-zinc mining target area.
2. The target prediction-based blind carbonate type lead zinc ore prospecting method according to claim 1, wherein after comprehensively analyzing according to the deep mineralization information of the ore formation and the spatial spread characteristics of the ore formation to define the deep lead zinc prospecting target, further comprising:
and carrying out deep drilling verification on the deep lead-zinc mining target area.
3. The target area prediction-based hidden carbonate type lead-zinc ore prospecting method of claim 1, wherein the carbonate type lead-zinc ore prospecting rule study is performed on the target area to determine the prospecting far field area, comprising:
obtaining result data; the achievement data comprises: basic geology, geophysical prospecting, chemical prospecting, mineral products, scientific research and papers of areas and mining areas;
According to the result data, carrying out research on the ore formation rule of carbonate type lead zinc ores in the target area so as to determine an ore formation remote scenic spot; the mine-forming distant party comprises: the coupling part of the fracture structural band at the edge of the subsidence basin and the carbonate rock construction distribution area, the known ore formation area, the existing controlled ore fracture structural band and the periphery and deep part of the large and medium-sized ore deposit.
4. A method of mining blind carbonate type lead-zinc ore prospecting according to claim 3, wherein after conducting a carbonate type lead-zinc ore prospecting rule study on the target area to determine the prospecting future zone, further comprising:
on the basis of the research on the ore formation rule of the carbonate type lead zinc ore, regional mineral investigation is carried out, the contact relation between rock construction, structure, magma rock and fracture edge related to ore formation is ascertained, the construction characteristics of the fracture edge and the rock in the fracture basin are known, and a regional ore formation rule series chart is compiled by combining the ore body output characteristics.
5. The target prediction-based blind carbonate type lead zinc ore prospecting method according to claim 1, wherein the inversion construction evolution process comprises: the fractured basin prototype is restored and the reverse thrust tectorial system is restored.
6. The target prediction-based blind carbonate type lead zinc ore prospecting method according to claim 1, wherein the key mineralisation control factors comprise: fracture structure of the edge of the subsidence basin and construction of the inner side of the basin and the overlying carbonate rock.
7. The target prediction-based blind carbonate type lead zinc ore prospecting method according to claim 1, wherein the mineralisation-facilitating zone comprises a high-angle normal fault of the edge of the subsidence basin and an overlying carbonate rock construction distribution zone inside thereof.
8. The target prediction based blind carbonate type lead zinc ore prospecting method according to claim 1, wherein the test item of the constructed geochemical sample comprises: pb, zn, ag, cd, as, sb, cu, co, ni, cr, W, sn, mo, bi elements.
9. The target prediction-based blind carbonate type lead zinc ore prospecting method according to claim 1, wherein the collecting of the audio magnetotelluric sounding data in the diagenetic advantage region and the processing and inversion of the collected data, interpretation of the mineral rock construction space layout features for fine resolution into the mineral construction space layout features, comprises:
the self-checking and the calibration of the magnetic rod are carried out by a V8-6R multifunctional electric instrument so as to ensure the good working state of the instrument;
The method comprises the steps of utilizing an instrument to collect data, processing the collected data, and utilizing inversion software to invert the nonlinear conjugate gradient of the one-dimensional Occam-TE+two-dimensional TM with the topography;
And (3) establishing a target area rock construction-structure-electrical model through comparative interpretation, interpreting the target area construction grid and the rock construction structure, and finely resolving the target area construction grid and the rock construction structure into the spatial distribution characteristics of the deep structural surface of the mineral construction to form an interpretation graph.
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